<?php

namespace App\Services\Qms;

use App\Models\CustomerFeedback;
use App\Models\QueueAppointment;
use App\Models\ServiceQueue;
use App\Models\Ticket;
use Illuminate\Support\Carbon;

class AnalyticsService
{
    public function __construct(
        protected DashboardStats $dashboard,
    ) {}

    /**
     * @return array<string, mixed>
     */
    public function overview(string $ownerRef, int $organizationId, ?int $branchId = null): array
    {
        $stats = $this->dashboard->forOrganization($ownerRef, $organizationId, $branchId);

        $today = Ticket::owned($ownerRef)
            ->where('organization_id', $organizationId)
            ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
            ->whereDate('issued_at', today());

        $bySource = (clone $today)
            ->selectRaw('source, COUNT(*) as total')
            ->groupBy('source')
            ->pluck('total', 'source')
            ->all();

        $byPriority = (clone $today)
            ->selectRaw('priority, COUNT(*) as total')
            ->groupBy('priority')
            ->pluck('total', 'priority')
            ->all();

        $appointmentsToday = QueueAppointment::owned($ownerRef)
            ->where('organization_id', $organizationId)
            ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
            ->whereDate('scheduled_at', today())
            ->count();

        $feedbackAvg = CustomerFeedback::owned($ownerRef)
            ->where('organization_id', $organizationId)
            ->when($branchId, fn ($q) => $q->whereHas('ticket', fn ($t) => $t->where('branch_id', $branchId)))
            ->where('created_at', '>=', now()->subDays(30))
            ->avg('rating');

        $queueLoad = ServiceQueue::owned($ownerRef)
            ->where('organization_id', $organizationId)
            ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
            ->where('is_active', true)
            ->withCount(['tickets as waiting_count' => fn ($q) => $q->where('status', 'waiting')])
            ->orderByDesc('waiting_count')
            ->limit(5)
            ->get()
            ->map(fn ($q) => ['name' => $q->name, 'waiting' => $q->waiting_count])
            ->all();

        return array_merge($stats, [
            'tickets_by_source' => $bySource,
            'tickets_by_priority' => $byPriority,
            'appointments_today' => $appointmentsToday,
            'feedback_avg_30d' => round((float) $feedbackAvg, 1),
            'busiest_queues' => $queueLoad,
        ]);
    }

    /**
     * @return list<array{date: string, issued: int, completed: int}>
     */
    public function dailyTrend(string $ownerRef, int $organizationId, int $days = 14, ?int $branchId = null): array
    {
        $from = now()->subDays($days - 1)->startOfDay();

        $issued = Ticket::owned($ownerRef)
            ->where('organization_id', $organizationId)
            ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
            ->where('issued_at', '>=', $from)
            ->selectRaw('DATE(issued_at) as d, COUNT(*) as c')
            ->groupBy('d')
            ->pluck('c', 'd');

        $completed = Ticket::owned($ownerRef)
            ->where('organization_id', $organizationId)
            ->when($branchId, fn ($q) => $q->where('branch_id', $branchId))
            ->where('status', 'completed')
            ->where('completed_at', '>=', $from)
            ->selectRaw('DATE(completed_at) as d, COUNT(*) as c')
            ->groupBy('d')
            ->pluck('c', 'd');

        $trend = [];
        for ($i = 0; $i < $days; $i++) {
            $date = $from->copy()->addDays($i)->toDateString();
            $trend[] = [
                'date' => $date,
                'issued' => (int) ($issued[$date] ?? 0),
                'completed' => (int) ($completed[$date] ?? 0),
            ];
        }

        return $trend;
    }
}