<?php

namespace App\Http\Controllers\Qms;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Qms\Concerns\ScopesToAccount;
use App\Models\Branch;
use App\Services\Qms\OrganizationResolver;
use App\Services\Qms\QmsPermissions;
use App\Services\Qms\ReportService;
use Illuminate\Http\Request;
use Illuminate\Support\Carbon;
use Illuminate\View\View;
use Symfony\Component\HttpFoundation\StreamedResponse;

class ReportController extends Controller
{
    use ScopesToAccount;

    public function __construct(
        protected ReportService $reports,
    ) {}

    public function index(Request $request): View
    {
        $this->authorizeAbility($request, 'reports.view');
        $organization = $this->organization($request);

        $branches = Branch::owned($this->ownerRef($request))
            ->where('organization_id', $organization->id)
            ->where('is_active', true)
            ->orderBy('name')
            ->get();

        return view('qms.reports.index', [
            'organization' => $organization,
            'branches' => $branches,
            'reports' => config('qms.report_types'),
            'heroStats' => [
                'reports' => count(config('qms.report_types')),
                'branches' => $branches->count(),
            ],
        ]);
    }

    public function show(Request $request, string $type): View
    {
        $this->authorizeReport($request, $type);
        $organization = $this->organization($request);
        $branchScope = app(OrganizationResolver::class)->branchScope($this->member($request));
        $branchId = $request->input('branch_id') ? (int) $request->input('branch_id') : $branchScope;
        [$from, $to] = $this->dateRange($request);
        $owner = $this->ownerRef($request);

        $data = match ($type) {
            'tickets' => $this->reports->ticketsReport($owner, $organization->id, $from, $to, $branchId),
            'wait_times' => $this->reports->waitTimesReport($owner, $organization->id, $from, $to, $branchId),
            'counters' => $this->reports->countersReport($owner, $organization->id, $from, $to, $branchId),
            'appointments' => $this->reports->appointmentsReport($owner, $organization->id, $from, $to, $branchId),
            'feedback' => $this->reports->feedbackReport($owner, $organization->id, $from, $to, $branchId),
            'service_sessions' => $this->reports->serviceSessionsReport($owner, $organization->id, $from, $to, $branchId),
            default => abort(404),
        };

        $branches = Branch::owned($owner)
            ->where('organization_id', $organization->id)
            ->orderBy('name')
            ->get();

        return view('qms.reports.show', [
            'type' => $type,
            'label' => config('qms.report_types')[$type] ?? $type,
            'data' => $data,
            'from' => $from->toDateString(),
            'to' => $to->toDateString(),
            'branchId' => $branchId,
            'branches' => $branches,
            'canExport' => app(QmsPermissions::class)->can($this->member($request), 'reports.export'),
        ]);
    }

    public function export(Request $request, string $type): StreamedResponse
    {
        $this->authorizeReport($request, $type);
        abort_unless(app(QmsPermissions::class)->can($this->member($request), 'reports.export'), 403);

        $organization = $this->organization($request);
        $branchScope = app(OrganizationResolver::class)->branchScope($this->member($request));
        $branchId = $request->input('branch_id') ? (int) $request->input('branch_id') : $branchScope;
        [$from, $to] = $this->dateRange($request);
        $owner = $this->ownerRef($request);

        $data = match ($type) {
            'tickets' => $this->reports->ticketsReport($owner, $organization->id, $from, $to, $branchId),
            'wait_times' => $this->reports->waitTimesReport($owner, $organization->id, $from, $to, $branchId),
            'counters' => $this->reports->countersReport($owner, $organization->id, $from, $to, $branchId),
            'appointments' => $this->reports->appointmentsReport($owner, $organization->id, $from, $to, $branchId),
            'feedback' => $this->reports->feedbackReport($owner, $organization->id, $from, $to, $branchId),
            'service_sessions' => $this->reports->serviceSessionsReport($owner, $organization->id, $from, $to, $branchId),
            default => abort(404),
        };

        $filename = "queue-report-{$type}-".now()->format('Y-m-d').'.csv';

        return response()->streamDownload(function () use ($data, $type) {
            $handle = fopen('php://output', 'w');
            if ($type === 'wait_times' && isset($data['hourly'])) {
                fputcsv($handle, ['Hour', 'Avg wait (seconds)']);
                foreach ($data['hourly'] as $row) {
                    fputcsv($handle, [$row['hour'], $row['avg_wait_seconds']]);
                }
            } elseif ($type === 'counters' && isset($data['counters'])) {
                fputcsv($handle, ['Counter', 'Served']);
                foreach ($data['counters'] as $row) {
                    fputcsv($handle, [$row['name'], $row['served']]);
                }
            } else {
                fputcsv($handle, ['Metric', 'Value']);
                foreach ($data as $key => $value) {
                    if (is_array($value)) {
                        continue;
                    }
                    fputcsv($handle, [$key, $value]);
                }
            }
            fclose($handle);
        }, $filename, ['Content-Type' => 'text/csv']);
    }

    protected function authorizeReport(Request $request, string $type): void
    {
        abort_unless(array_key_exists($type, config('qms.report_types')), 404);
        $this->authorizeAbility($request, 'reports.view');
    }

    /**
     * @return array{0: Carbon, 1: Carbon}
     */
    protected function dateRange(Request $request): array
    {
        $from = Carbon::parse($request->input('from', now()->subDays(30)->toDateString()))->startOfDay();
        $to = Carbon::parse($request->input('to', now()->toDateString()))->endOfDay();

        return [$from, $to];
    }
}