<?php

namespace App\Services\Care;

use App\Models\Appointment;
use App\Models\Assessment;
use App\Models\AssessmentAnswer;
use App\Models\AssessmentQuestion;
use App\Models\AssessmentScore;
use App\Models\AssessmentTemplate;
use App\Models\Bill;
use App\Models\BillLineItem;
use App\Models\Branch;
use App\Models\Consultation;
use App\Models\Department;
use App\Models\Drug;
use App\Models\DrugBatch;
use App\Models\InvestigationRequest;
use App\Models\InvestigationType;
use App\Models\Member;
use App\Models\Organization;
use App\Models\Patient;
use App\Models\Payment;
use App\Models\Practitioner;
use App\Models\Prescription;
use App\Models\User;
use App\Models\Visit;
use App\Models\VitalSign;
use App\Support\DemoWorld;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

/**
 * Idempotent, plan-aware demo data for a Care tenant (keyed by owner_ref / public_id).
 */
class DemoTenantSeeder
{
    public const DEMO_TEMPLATE_CODE = 'demo_triage';

    /** @var list<string> */
    private const FIRST_NAMES = [
        'Ama', 'Kofi', 'Abena', 'Kwame', 'Akosua', 'Yaw', 'Efua', 'Kojo',
        'Adwoa', 'Kwesi', 'Afia', 'Kwadwo', 'Esi', 'Fiifi', 'Mansa', 'Nana',
    ];

    /** @var list<string> */
    private const LAST_NAMES = [
        'Mensah', 'Asante', 'Osei', 'Boateng', 'Owusu', 'Adjei', 'Appiah', 'Darko',
        'Agyeman', 'Sarpong', 'Nyarko', 'Ankrah', 'Tetteh', 'Quaye', 'Addo', 'Frimpong',
    ];

    /** @var list<string> */
    private const BRANCH_NAMES = [
        'Ridge Clinic', 'Osu Medical Centre', 'East Legon Care', 'Tema Harbour Clinic',
        'Kaneshie Health Hub', 'Spintex Wellness', 'Madina Family Clinic', 'Airport Residential Care',
    ];

    /** @var list<array{name: string, type: string}> */
    private const CORE_DEPARTMENTS = [
        ['name' => 'Outpatient', 'type' => 'outpatient'],
        ['name' => 'General Practice', 'type' => 'general'],
        ['name' => 'Nursing', 'type' => 'nursing'],
        ['name' => 'Specialist Clinic', 'type' => 'specialist'],
    ];

    /** @var list<array{name: string, type: string}> */
    private const PAID_DEPARTMENTS = [
        ['name' => 'Laboratory', 'type' => 'laboratory'],
        ['name' => 'Pharmacy', 'type' => 'pharmacy'],
    ];

    /** @var list<string> */
    private const SPECIALTIES = [
        'General Practice', 'Internal Medicine', 'Paediatrics', 'Obstetrics',
        'Emergency', 'Nursing', 'Laboratory', 'Pharmacy',
    ];

    /**
     * @return array{
     *     organization: Organization,
     *     branches: int,
     *     patients: int,
     *     appointments: int,
     *     plan: string
     * }
     */
    public function seed(User $user, string $plan, bool $reset = false): array
    {
        $plan = $this->normalizePlan($plan);
        $ownerRef = $user->ownerRef();
        $volumes = $this->volumes($plan);

        if ($reset) {
            DB::transaction(fn () => $this->resetTenant($ownerRef));
        }

        return DB::transaction(function () use ($user, $ownerRef, $plan, $volumes) {
            $organization = $this->upsertOrganization($user, $ownerRef, $plan, $volumes['branches']);
            $this->upsertOwnerMember($organization, $ownerRef);

            $branches = $this->seedBranches($organization, $ownerRef, $volumes);
            $this->seedStaffMembers($organization, $ownerRef, $plan, $branches);
            $departments = $this->seedDepartments($branches, $ownerRef, $volumes);
            $practitioners = $this->seedPractitioners($organization, $branches, $departments, $ownerRef, $volumes);
            $patients = $this->seedPatients($organization, $branches, $ownerRef, $volumes);
            $appointmentCount = $this->seedAppointmentsAndClinical(
                $organization,
                $branches,
                $departments,
                $practitioners,
                $patients,
                $ownerRef,
                $volumes,
            );

            if ($volumes['paid_modules']) {
                $this->seedPaidModules(
                    $organization,
                    $branches,
                    $practitioners,
                    $patients,
                    $ownerRef,
                    $volumes,
                );
            }

            if ($volumes['assessments'] > 0) {
                $this->seedAssessments(
                    $organization,
                    $branches,
                    $practitioners,
                    $patients,
                    $ownerRef,
                    $volumes['assessments'],
                );
            }

            return [
                'organization' => $organization->fresh(),
                'branches' => count($branches),
                'patients' => count($patients),
                'appointments' => $appointmentCount,
                'plan' => $plan,
            ];
        });
    }

    public function resetTenant(string $ownerRef): void
    {
        $orgIds = DB::table('care_organizations')->where('owner_ref', $ownerRef)->pluck('id');

        DB::table('care_assessment_answers')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_assessment_scores')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_assessments')->where('owner_ref', $ownerRef)->update(['patient_pathway_id' => null]);
        DB::table('care_patient_pathways')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_assessments')->where('owner_ref', $ownerRef)->delete();

        if ($orgIds->isNotEmpty()) {
            $templateIds = DB::table('care_assessment_templates')
                ->whereIn('organization_id', $orgIds)
                ->pluck('id');
            if ($templateIds->isNotEmpty()) {
                DB::table('care_assessment_questions')->whereIn('template_id', $templateIds)->delete();
                DB::table('care_assessment_templates')->whereIn('id', $templateIds)->delete();
            }
        }

        // Orphaned demo templates left behind by nullOnDelete on prior resets.
        $orphanIds = DB::table('care_assessment_templates')
            ->where('code', self::DEMO_TEMPLATE_CODE)
            ->whereNull('organization_id')
            ->pluck('id');
        if ($orphanIds->isNotEmpty()) {
            DB::table('care_assessment_questions')->whereIn('template_id', $orphanIds)->delete();
            DB::table('care_assessment_templates')->whereIn('id', $orphanIds)->delete();
        }

        DB::table('care_dispensing_records')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_payments')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_bill_line_items')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_bills')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_investigation_result_values')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_investigation_attachments')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_investigation_results')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_investigation_requests')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_prescription_items')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_prescriptions')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_drug_batches')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_drugs')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_investigation_types')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_consultation_documents')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_diagnoses')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_vital_signs')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_consultations')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_appointments')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_visits')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_patient_allergies')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_patient_conditions')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_patient_family_history')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_emergency_contacts')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_insurance_policies')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_patient_attachments')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_patients')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_practitioner_schedules')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_practitioners')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_members')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_departments')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_branches')->where('owner_ref', $ownerRef)->delete();

        DB::table('care_messaging_credentials')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_payment_gateway_settings')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_audit_logs')->where('owner_ref', $ownerRef)->delete();
        DB::table('care_organizations')->where('owner_ref', $ownerRef)->delete();
    }

    /**
     * @return array{
     *     branches: int,
     *     departments_per_branch: int,
     *     practitioners: int,
     *     patients: int,
     *     appointments: int,
     *     paid_modules: bool,
     *     assessments: int,
     *     lab_requests: int,
     *     prescriptions: int,
     *     bills: int
     * }
     */
    public function volumes(string $plan): array
    {
        $testing = app()->runningUnitTests();

        return match ($this->normalizePlan($plan)) {
            'free' => [
                'branches' => 1,
                'departments_per_branch' => 2,
                'practitioners' => 3,
                'patients' => $testing ? 12 : 30,
                'appointments' => $testing ? 20 : 50,
                'paid_modules' => false,
                'assessments' => 0,
                'lab_requests' => 0,
                'prescriptions' => 0,
                'bills' => 0,
            ],
            'pro' => [
                'branches' => 3,
                'departments_per_branch' => 3,
                'practitioners' => 8,
                'patients' => $testing ? 24 : 200,
                'appointments' => $testing ? 40 : 300,
                'paid_modules' => true,
                'assessments' => 0,
                'lab_requests' => $testing ? 8 : 40,
                'prescriptions' => $testing ? 8 : 40,
                'bills' => $testing ? 10 : 60,
            ],
            'enterprise' => [
                'branches' => 6,
                'departments_per_branch' => 4,
                'practitioners' => 16,
                'patients' => $testing ? 36 : 500,
                'appointments' => $testing ? 60 : 800,
                'paid_modules' => true,
                'assessments' => $testing ? 12 : 80,
                'lab_requests' => $testing ? 12 : 80,
                'prescriptions' => $testing ? 12 : 80,
                'bills' => $testing ? 15 : 120,
            ],
            default => throw new \InvalidArgumentException("Unsupported plan [{$plan}]"),
        };
    }

    private function normalizePlan(string $plan): string
    {
        $plan = strtolower(trim($plan));

        return in_array($plan, ['free', 'pro', 'enterprise'], true) ? $plan : 'free';
    }

    private function upsertOrganization(User $user, string $ownerRef, string $plan, int $billedBranches): Organization
    {
        $slug = 'demo-'.Str::slug(Str::limit($user->email ?: $ownerRef, 40, ''));
        if ($slug === 'demo-' || $slug === 'demo') {
            $slug = 'demo-'.Str::lower(Str::substr($ownerRef, 0, 8));
        }

        $name = DemoWorld::business($plan)['name'];

        $organization = Organization::withTrashed()
            ->where('owner_ref', $ownerRef)
            ->first();

        $settings = array_merge($organization?->settings ?? [], [
            'onboarded' => true,
            'facility_type' => $plan === 'enterprise' ? 'hospital' : 'clinic',
            'plan' => $plan,
            'plan_expires_at' => now()->addYear()->toIso8601String(),
            'billed_branches' => max(1, $billedBranches),
            'demo' => true,
        ]);

        if ($organization) {
            if ($organization->trashed()) {
                $organization->restore();
            }
            $organization->update([
                'name' => $name,
                'slug' => $slug,
                'timezone' => 'Africa/Accra',
                'settings' => $settings,
            ]);

            return $organization->fresh();
        }

        return Organization::create([
            'owner_ref' => $ownerRef,
            'name' => $name,
            'slug' => $slug,
            'timezone' => 'Africa/Accra',
            'settings' => $settings,
        ]);
    }

    private function upsertOwnerMember(Organization $organization, string $ownerRef): Member
    {
        return Member::query()->updateOrCreate(
            [
                'organization_id' => $organization->id,
                'user_ref' => $ownerRef,
            ],
            [
                'owner_ref' => $ownerRef,
                'role' => 'hospital_admin',
                'branch_id' => null,
            ],
        );
    }

    /**
     * @param  array<string, mixed>  $volumes
     * @return list<Branch>
     */
    private function seedBranches(Organization $organization, string $ownerRef, array $volumes): array
    {
        $catalog = DemoWorld::branches($this->normalizePlan(
            (string) data_get($organization->settings, 'plan', 'free')
        ), $volumes['branches']);
        $branches = [];
        foreach ($catalog as $i => $spec) {
            $code = $spec['code'] !== '' ? $spec['code'] : sprintf('DEMO-BR-%02d', $i + 1);
            $branches[] = Branch::withTrashed()->updateOrCreate(
                [
                    'organization_id' => $organization->id,
                    'code' => $code,
                ],
                [
                    'owner_ref' => $ownerRef,
                    'name' => $spec['name'],
                    'address' => $spec['address'],
                    'phone' => $spec['phone'],
                    'is_active' => true,
                    'deleted_at' => null,
                ],
            );
        }

        return $branches;
    }

    /**
     * Local Member rows for DemoWorld staff (user_ref = email until SSO remaps to public_id).
     *
     * @param  list<Branch>  $branches
     */
    private function seedStaffMembers(Organization $organization, string $ownerRef, string $plan, array $branches): void
    {
        $hq = $branches[0] ?? null;
        foreach (DemoWorld::staff($plan) as $staff) {
            $role = $staff['roles']['care'] ?? null;
            if (! is_string($role) || $role === '') {
                continue;
            }

            Member::query()->updateOrCreate(
                [
                    'organization_id' => $organization->id,
                    'user_ref' => strtolower($staff['email']),
                ],
                [
                    'owner_ref' => $ownerRef,
                    'role' => $role,
                    'branch_id' => in_array($role, ['hospital_admin'], true) ? null : $hq?->id,
                ],
            );
        }
    }

    /**
     * @param  list<Branch>  $branches
     * @param  array<string, mixed>  $volumes
     * @return array<int, list<Department>> keyed by branch id
     */
    private function seedDepartments(array $branches, string $ownerRef, array $volumes): array
    {
        $catalog = self::CORE_DEPARTMENTS;
        if ($volumes['paid_modules']) {
            $catalog = array_merge($catalog, self::PAID_DEPARTMENTS);
        }

        $byBranch = [];
        foreach ($branches as $branch) {
            $byBranch[$branch->id] = [];
            $count = min($volumes['departments_per_branch'], count($catalog));
            for ($i = 0; $i < $count; $i++) {
                $spec = $catalog[$i];
                $byBranch[$branch->id][] = Department::withTrashed()->updateOrCreate(
                    [
                        'branch_id' => $branch->id,
                        'name' => $spec['name'],
                    ],
                    [
                        'owner_ref' => $ownerRef,
                        'type' => $spec['type'],
                        'is_active' => true,
                        'deleted_at' => null,
                    ],
                );
            }
        }

        return $byBranch;
    }

    /**
     * @param  list<Branch>  $branches
     * @param  array<int, list<Department>>  $departments
     * @param  array<string, mixed>  $volumes
     * @return list<Practitioner>
     */
    private function seedPractitioners(
        Organization $organization,
        array $branches,
        array $departments,
        string $ownerRef,
        array $volumes,
    ): array {
        $practitioners = [];
        for ($i = 0; $i < $volumes['practitioners']; $i++) {
            $branch = $branches[$i % count($branches)];
            $branchDepts = $departments[$branch->id] ?? [];
            $department = $branchDepts[$i % max(1, count($branchDepts))] ?? null;
            $key = sprintf('demo-prac-%s-%02d', $ownerRef, $i + 1);

            $practitioners[] = Practitioner::withTrashed()->updateOrCreate(
                [
                    'organization_id' => $organization->id,
                    'user_ref' => $key,
                ],
                [
                    'owner_ref' => $ownerRef,
                    'branch_id' => $branch->id,
                    'department_id' => $department?->id,
                    'member_id' => null,
                    'name' => 'Dr. '.self::FIRST_NAMES[$i % count(self::FIRST_NAMES)].' '.self::LAST_NAMES[$i % count(self::LAST_NAMES)],
                    'specialty' => self::SPECIALTIES[$i % count(self::SPECIALTIES)],
                    'is_active' => true,
                    'deleted_at' => null,
                ],
            );
        }

        return $practitioners;
    }

    /**
     * @param  list<Branch>  $branches
     * @param  array<string, mixed>  $volumes
     * @return list<Patient>
     */
    private function seedPatients(
        Organization $organization,
        array $branches,
        string $ownerRef,
        array $volumes,
    ): array {
        $worldPeople = DemoWorld::people();
        $patients = [];
        for ($i = 0; $i < $volumes['patients']; $i++) {
            $branch = $branches[$i % count($branches)];
            $number = sprintf('DEMO-%s-%05d', Str::upper(Str::substr(md5($ownerRef), 0, 4)), $i + 1);
            $person = $worldPeople[$i] ?? null;
            if ($person === null) {
                $base = $worldPeople[$i % count($worldPeople)];
                $seq = $i + 1;
                $person = [
                    'first_name' => $base['first_name'],
                    'last_name' => $base['last_name'],
                    'gender' => $base['gender'],
                    'dob' => $base['dob'],
                    'phone' => '+23324'.str_pad((string) (1000000 + $seq), 7, '0', STR_PAD_LEFT),
                    'email' => sprintf('patient.%d@demo.ladill.com', $seq),
                    'national_id' => sprintf('GHA-729%06d', $seq),
                    'city' => $base['city'],
                    'address' => $base['address'],
                ];
            }

            $patients[] = Patient::withTrashed()->updateOrCreate(
                [
                    'organization_id' => $organization->id,
                    'patient_number' => $number,
                ],
                [
                    'uuid' => $this->demoUuid("patient|{$ownerRef}|{$i}"),
                    'owner_ref' => $ownerRef,
                    'branch_id' => $branch->id,
                    'first_name' => $person['first_name'],
                    'last_name' => $person['last_name'],
                    'gender' => $person['gender'],
                    'date_of_birth' => $person['dob'],
                    'phone' => $person['phone'],
                    'email' => $person['email'],
                    'national_id' => $person['national_id'],
                    'city' => $person['city'],
                    'region' => 'Greater Accra',
                    'address' => $person['address'],
                    'deleted_at' => null,
                ],
            );
        }

        return $patients;
    }

    /**
     * @param  list<Branch>  $branches
     * @param  array<int, list<Department>>  $departments
     * @param  list<Practitioner>  $practitioners
     * @param  list<Patient>  $patients
     * @param  array<string, mixed>  $volumes
     */
    private function seedAppointmentsAndClinical(
        Organization $organization,
        array $branches,
        array $departments,
        array $practitioners,
        array $patients,
        string $ownerRef,
        array $volumes,
    ): int {
        $statuses = [
            Appointment::STATUS_SCHEDULED,
            Appointment::STATUS_CHECKED_IN,
            Appointment::STATUS_WAITING,
            Appointment::STATUS_COMPLETED,
            Appointment::STATUS_COMPLETED,
            Appointment::STATUS_CANCELLED,
        ];
        $reasons = ['Follow-up', 'New complaint', 'Review labs', 'Chronic care'];
        $symptoms = ['Fever', 'Cough', 'Headache', 'Fatigue'];

        $count = 0;
        for ($i = 0; $i < $volumes['appointments']; $i++) {
            $patient = $patients[$i % count($patients)];
            $practitioner = $practitioners[$i % count($practitioners)];
            $branch = $branches[$i % count($branches)];
            $branchDepts = $departments[$branch->id] ?? [];
            $department = $branchDepts[$i % max(1, count($branchDepts))] ?? null;
            $status = $statuses[$i % count($statuses)];
            $scheduledAt = now()->subDays(14)->addHours($i * 3);

            $visit = null;
            if (in_array($status, [Appointment::STATUS_CHECKED_IN, Appointment::STATUS_WAITING, Appointment::STATUS_COMPLETED], true)) {
                $visit = Visit::withTrashed()->updateOrCreate(
                    ['uuid' => $this->demoUuid("visit|{$ownerRef}|{$i}")],
                    [
                        'owner_ref' => $ownerRef,
                        'organization_id' => $organization->id,
                        'branch_id' => $branch->id,
                        'patient_id' => $patient->id,
                        'status' => $status === Appointment::STATUS_COMPLETED
                            ? Visit::STATUS_COMPLETED
                            : Visit::STATUS_IN_PROGRESS,
                        'checked_in_at' => $scheduledAt->copy()->addMinutes(5),
                        'completed_at' => $status === Appointment::STATUS_COMPLETED
                            ? $scheduledAt->copy()->addHour()
                            : null,
                        'checked_in_by' => $ownerRef,
                        'deleted_at' => null,
                    ],
                );
            }

            Appointment::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("appt|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'branch_id' => $branch->id,
                    'patient_id' => $patient->id,
                    'practitioner_id' => $practitioner->id,
                    'department_id' => $department?->id,
                    'visit_id' => $visit?->id,
                    'type' => $i % 5 === 0 ? Appointment::TYPE_WALK_IN : Appointment::TYPE_SCHEDULED,
                    'status' => $status,
                    'scheduled_at' => $scheduledAt,
                    'checked_in_at' => $visit?->checked_in_at,
                    'completed_at' => $status === Appointment::STATUS_COMPLETED
                        ? $scheduledAt->copy()->addHour()
                        : null,
                    'cancelled_at' => $status === Appointment::STATUS_CANCELLED
                        ? $scheduledAt->copy()->subHour()
                        : null,
                    'reason' => $reasons[$i % count($reasons)],
                    'created_by' => $ownerRef,
                    'deleted_at' => null,
                ],
            );

            if ($visit && $status === Appointment::STATUS_COMPLETED) {
                $consultation = Consultation::withTrashed()->updateOrCreate(
                    ['uuid' => $this->demoUuid("consult|{$ownerRef}|{$i}")],
                    [
                        'owner_ref' => $ownerRef,
                        'visit_id' => $visit->id,
                        'appointment_id' => null,
                        'practitioner_id' => $practitioner->id,
                        'patient_id' => $patient->id,
                        'status' => Consultation::STATUS_COMPLETED,
                        'symptoms' => $symptoms[$i % count($symptoms)],
                        'clinical_notes' => 'Demo consultation notes.',
                        'started_at' => $scheduledAt->copy()->addMinutes(15),
                        'completed_at' => $scheduledAt->copy()->addHour(),
                        'completed_by' => $ownerRef,
                        'deleted_at' => null,
                    ],
                );

                VitalSign::query()->updateOrCreate(
                    [
                        'consultation_id' => $consultation->id,
                        'recorded_at' => $scheduledAt->copy()->addMinutes(10),
                    ],
                    [
                        'owner_ref' => $ownerRef,
                        'bp_systolic' => 110 + ($i % 30),
                        'bp_diastolic' => 70 + ($i % 15),
                        'pulse' => 60 + ($i % 40),
                        'temperature' => 36.5 + (($i % 10) / 10),
                        'weight_kg' => 55 + ($i % 40),
                        'height_cm' => 150 + ($i % 40),
                        'spo2' => 95 + ($i % 5),
                        'respiratory_rate' => 14 + ($i % 6),
                        'recorded_by' => $ownerRef,
                    ],
                );
            }

            $count++;
        }

        return $count;
    }

    /**
     * @param  list<Branch>  $branches
     * @param  list<Practitioner>  $practitioners
     * @param  list<Patient>  $patients
     * @param  array<string, mixed>  $volumes
     */
    private function seedPaidModules(
        Organization $organization,
        array $branches,
        array $practitioners,
        array $patients,
        string $ownerRef,
        array $volumes,
    ): void {
        $types = [];
        foreach ([
            ['name' => 'Fasting Blood Glucose', 'code' => 'FBG', 'category' => 'blood', 'unit' => 'mmol/L', 'low' => 3.9, 'high' => 6.1, 'price' => 2500],
            ['name' => 'Full Blood Count', 'code' => 'FBC', 'category' => 'blood', 'unit' => null, 'low' => null, 'high' => null, 'price' => 4500],
            ['name' => 'Malaria Parasite', 'code' => 'MP', 'category' => 'blood', 'unit' => null, 'low' => null, 'high' => null, 'price' => 1500],
            ['name' => 'Urinalysis', 'code' => 'UA', 'category' => 'urine', 'unit' => null, 'low' => null, 'high' => null, 'price' => 2000],
        ] as $i => $spec) {
            $types[] = InvestigationType::withTrashed()->updateOrCreate(
                [
                    'organization_id' => $organization->id,
                    'code' => $spec['code'],
                ],
                [
                    'owner_ref' => $ownerRef,
                    'name' => $spec['name'],
                    'category' => $spec['category'],
                    'unit' => $spec['unit'],
                    'reference_low' => $spec['low'],
                    'reference_high' => $spec['high'],
                    'price_minor' => $spec['price'],
                    'is_active' => true,
                    'deleted_at' => null,
                ],
            );
        }

        $drugs = [];
        foreach ([
            ['name' => 'Amoxicillin 500mg', 'unit' => 'capsule', 'price' => 1500],
            ['name' => 'Paracetamol 500mg', 'unit' => 'tablet', 'price' => 50],
            ['name' => 'Metformin 500mg', 'unit' => 'tablet', 'price' => 80],
            ['name' => 'Amlodipine 5mg', 'unit' => 'tablet', 'price' => 120],
        ] as $i => $spec) {
            $drug = Drug::withTrashed()->updateOrCreate(
                [
                    'organization_id' => $organization->id,
                    'sku' => 'DEMO-DRUG-'.($i + 1),
                ],
                [
                    'owner_ref' => $ownerRef,
                    'branch_id' => $branches[0]->id,
                    'name' => $spec['name'],
                    'generic_name' => $spec['name'],
                    'unit' => $spec['unit'],
                    'unit_price_minor' => $spec['price'],
                    'reorder_level' => 20,
                    'is_active' => true,
                    'deleted_at' => null,
                ],
            );
            DrugBatch::query()->updateOrCreate(
                [
                    'drug_id' => $drug->id,
                    'batch_number' => 'DEMO-BATCH-'.($i + 1),
                ],
                [
                    'owner_ref' => $ownerRef,
                    'expiry_date' => now()->addYear()->toDateString(),
                    'quantity_on_hand' => 200,
                    'cost_minor' => (int) ($spec['price'] * 0.6),
                    'received_at' => now()->subDays(10),
                ],
            );
            $drugs[] = $drug;
        }

        for ($i = 0; $i < $volumes['lab_requests']; $i++) {
            $patient = $patients[$i % count($patients)];
            $branch = $branches[$i % count($branches)];
            $practitioner = $practitioners[$i % count($practitioners)];
            $type = $types[$i % count($types)];

            $visit = Visit::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("lab-visit|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'branch_id' => $branch->id,
                    'patient_id' => $patient->id,
                    'status' => Visit::STATUS_IN_PROGRESS,
                    'checked_in_at' => now()->subDays($i % 10),
                    'checked_in_by' => $ownerRef,
                    'deleted_at' => null,
                ],
            );

            $consultation = Consultation::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("lab-consult|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'visit_id' => $visit->id,
                    'practitioner_id' => $practitioner->id,
                    'patient_id' => $patient->id,
                    'status' => Consultation::STATUS_DRAFT,
                    'started_at' => now()->subDays($i % 10),
                    'deleted_at' => null,
                ],
            );

            InvestigationRequest::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("lab-req|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'branch_id' => $branch->id,
                    'visit_id' => $visit->id,
                    'consultation_id' => $consultation->id,
                    'patient_id' => $patient->id,
                    'investigation_type_id' => $type->id,
                    'practitioner_id' => $practitioner->id,
                    'status' => InvestigationRequest::STATUS_PENDING,
                    'priority' => 'routine',
                    'clinical_notes' => 'Demo lab request',
                    'requested_by' => $ownerRef,
                    'deleted_at' => null,
                ],
            );
        }

        for ($i = 0; $i < $volumes['prescriptions']; $i++) {
            $patient = $patients[$i % count($patients)];
            $branch = $branches[$i % count($branches)];
            $practitioner = $practitioners[$i % count($practitioners)];
            $drug = $drugs[$i % count($drugs)];

            $visit = Visit::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("rx-visit|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'branch_id' => $branch->id,
                    'patient_id' => $patient->id,
                    'status' => Visit::STATUS_IN_PROGRESS,
                    'checked_in_at' => now()->subDays($i % 7),
                    'checked_in_by' => $ownerRef,
                    'deleted_at' => null,
                ],
            );

            $consultation = Consultation::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("rx-consult|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'visit_id' => $visit->id,
                    'practitioner_id' => $practitioner->id,
                    'patient_id' => $patient->id,
                    'status' => Consultation::STATUS_DRAFT,
                    'started_at' => now()->subDays($i % 7),
                    'deleted_at' => null,
                ],
            );

            $prescription = Prescription::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("rx|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'visit_id' => $visit->id,
                    'consultation_id' => $consultation->id,
                    'patient_id' => $patient->id,
                    'practitioner_id' => $practitioner->id,
                    'status' => Prescription::STATUS_ACTIVE,
                    'prescribed_by' => $ownerRef,
                    'deleted_at' => null,
                ],
            );

            $prescription->items()->updateOrCreate(
                [
                    'prescription_id' => $prescription->id,
                    'name' => $drug->name,
                ],
                [
                    'owner_ref' => $ownerRef,
                    'drug_id' => $drug->id,
                    'dosage' => '1 '.$drug->unit,
                    'frequency' => 'BD',
                    'duration' => '5 days',
                    'quantity' => 10,
                    'sort_order' => 0,
                ],
            );
        }

        for ($i = 0; $i < $volumes['bills']; $i++) {
            $patient = $patients[$i % count($patients)];
            $branch = $branches[$i % count($branches)];
            $fee = 5000 + (($i % 5) * 1000);

            $visit = Visit::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("bill-visit|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'branch_id' => $branch->id,
                    'patient_id' => $patient->id,
                    'status' => Visit::STATUS_COMPLETED,
                    'checked_in_at' => now()->subDays($i % 12),
                    'completed_at' => now()->subDays($i % 12)->addHour(),
                    'checked_in_by' => $ownerRef,
                    'deleted_at' => null,
                ],
            );

            $bill = Bill::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("bill|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'branch_id' => $branch->id,
                    'visit_id' => $visit->id,
                    'patient_id' => $patient->id,
                    'invoice_number' => sprintf('DEMO-INV-%s-%04d', Str::upper(Str::substr(md5($ownerRef), 0, 4)), $i + 1),
                    'status' => $i % 3 === 0 ? Bill::STATUS_PAID : Bill::STATUS_OPEN,
                    'subtotal_minor' => $fee,
                    'discount_minor' => 0,
                    'tax_minor' => 0,
                    'total_minor' => $fee,
                    'amount_paid_minor' => $i % 3 === 0 ? $fee : 0,
                    'balance_minor' => $i % 3 === 0 ? 0 : $fee,
                    'created_by' => $ownerRef,
                    'finalized_at' => now()->subDays($i % 12),
                    'deleted_at' => null,
                ],
            );

            BillLineItem::query()->updateOrCreate(
                [
                    'bill_id' => $bill->id,
                    'description' => 'Consultation fee',
                ],
                [
                    'owner_ref' => $ownerRef,
                    'type' => 'consultation',
                    'quantity' => 1,
                    'unit_price_minor' => $fee,
                    'total_minor' => $fee,
                ],
            );

            if ($bill->status === Bill::STATUS_PAID) {
                Payment::query()->updateOrCreate(
                    ['uuid' => $this->demoUuid("pay|{$ownerRef}|{$i}")],
                    [
                        'owner_ref' => $ownerRef,
                        'bill_id' => $bill->id,
                        'amount_minor' => $fee,
                        'method' => Payment::METHOD_CASH,
                        'status' => Payment::STATUS_PAID,
                        'reference' => 'DEMO-PAY-'.($i + 1),
                        'paid_at' => now()->subDays($i % 12),
                        'recorded_by' => $ownerRef,
                    ],
                );
            }
        }
    }

    /**
     * @param  list<Branch>  $branches
     * @param  list<Practitioner>  $practitioners
     * @param  list<Patient>  $patients
     */
    private function seedAssessments(
        Organization $organization,
        array $branches,
        array $practitioners,
        array $patients,
        string $ownerRef,
        int $count,
    ): void {
        $template = AssessmentTemplate::withTrashed()->updateOrCreate(
            [
                'code' => self::DEMO_TEMPLATE_CODE,
                'version' => 1,
            ],
            [
                'organization_id' => $organization->id,
                'name' => 'Demo Triage Screen',
                'category' => AssessmentTemplate::CATEGORY_SCREENING,
                'description' => 'Lightweight demo assessment for enterprise analytics.',
                'is_current' => true,
                'is_active' => true,
                'scoring_strategy' => 'sum_items',
                'deleted_at' => null,
            ],
        );

        $question = AssessmentQuestion::query()->updateOrCreate(
            [
                'template_id' => $template->id,
                'code' => 'severity',
            ],
            [
                'section' => 'Triage',
                'label' => 'Severity (0-10)',
                'answer_type' => AssessmentQuestion::TYPE_SCALE,
                'is_required' => true,
                'sort_order' => 1,
                'score_key' => 'severity',
                'options' => ['min' => 0, 'max' => 10],
            ],
        );

        for ($i = 0; $i < $count; $i++) {
            $patient = $patients[$i % count($patients)];
            $branch = $branches[$i % count($branches)];
            $practitioner = $practitioners[$i % count($practitioners)];
            $scoreValue = (float) ($i % 11);

            $assessment = Assessment::withTrashed()->updateOrCreate(
                ['uuid' => $this->demoUuid("assess|{$ownerRef}|{$i}")],
                [
                    'owner_ref' => $ownerRef,
                    'organization_id' => $organization->id,
                    'branch_id' => $branch->id,
                    'patient_id' => $patient->id,
                    'template_id' => $template->id,
                    'practitioner_id' => $practitioner->id,
                    'status' => Assessment::STATUS_COMPLETED,
                    'assessed_at' => now()->subDays($i % 30),
                    'completed_at' => now()->subDays($i % 30),
                    'completed_by' => $ownerRef,
                    'started_by' => $ownerRef,
                    'notes' => 'Demo assessment',
                    'deleted_at' => null,
                ],
            );

            AssessmentAnswer::query()->updateOrCreate(
                [
                    'assessment_id' => $assessment->id,
                    'question_id' => $question->id,
                ],
                [
                    'owner_ref' => $ownerRef,
                    'value_number' => $scoreValue,
                ],
            );

            AssessmentScore::query()->updateOrCreate(
                ['assessment_id' => $assessment->id],
                [
                    'owner_ref' => $ownerRef,
                    'template_code' => self::DEMO_TEMPLATE_CODE,
                    'total_score' => $scoreValue,
                    'max_score' => 10,
                    'subscores' => ['severity' => $scoreValue],
                    'severity_label' => $scoreValue >= 7 ? 'high' : ($scoreValue >= 4 ? 'moderate' : 'low'),
                    'computed_at' => now()->subDays($i % 30),
                ],
            );
        }
    }

    private function demoUuid(string $key): string
    {
        $hex = md5('ladill-care-demo|'.$key);

        return sprintf(
            '%s-%s-%s-%s-%s',
            substr($hex, 0, 8),
            substr($hex, 8, 4),
            substr($hex, 12, 4),
            substr($hex, 16, 4),
            substr($hex, 20, 12),
        );
    }
}