<?php

namespace App\Http\Controllers\Api\V1\Scanner;

use App\Http\Controllers\Api\V1\ApiController;
use App\Http\Resources\CollectionTeamResource;
use App\Http\Resources\TripResource;
use App\Models\CollectionTeam;
use App\Models\DropOffPoint;
use App\Models\Trip;
use App\Models\TripStop;
use App\Services\Scan\ScanService;
use Carbon\Carbon;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;

class ScannerController extends ApiController
{
    public function __construct(private readonly ScanService $scanner) {}

    public function teamDetails(Request $request): JsonResponse
    {
        $user = $request->user();

        $team = CollectionTeam::query()
            ->with(['driver', 'scanner', 'truck', 'helpers.user'])
            ->where('scanner_id', $user->id)
            ->where('status', CollectionTeam::STATUS_ACTIVE)
            ->first();

        if (! $team) {
            return $this->fail('No active collection team assigned to this scanner', null, 404);
        }

        $trip = Trip::query()
            ->with(['route.stops.dropOffPoint', 'stops.dropOffPoint'])
            ->where('team_id', $team->id)
            ->whereIn('status', [Trip::STATUS_SCHEDULED, Trip::STATUS_IN_PROGRESS, Trip::STATUS_AT_DUMPSITE])
            ->orderBy('scheduled_date')
            ->first();

        return $this->ok([
            'team' => CollectionTeamResource::make($team),
            'active_trip' => $trip ? TripResource::make($trip) : null,
        ]);
    }

    public function scan(Request $request): JsonResponse
    {
        Log::info('DEBUG: Entering ScannerController::scan');
        $data = $request->validate([
            'serial' => ['required', 'string', 'max:64'],
            'drop_off_point_id' => ['required', 'integer', 'exists:drop_off_points,id'],
            'lat' => ['required', 'numeric', 'between:-90,90'],
            'lng' => ['required', 'numeric', 'between:-180,180'],
            'trip_id' => ['nullable', 'string', 'exists:trips,uuid'],
            'trip_stop_id' => ['nullable', 'integer', 'exists:trip_stops,id'],
            'weight_kg' => ['nullable', 'integer', 'min:0'],
            'waste_type' => ['nullable', 'string', 'max:50'],
            'photo_path' => ['nullable', 'string', 'max:255'],
            'notes' => ['nullable', 'string', 'max:500'],
            'scanned_at' => ['nullable', 'date'],
        ]);

        $dop = DropOffPoint::findOrFail($data['drop_off_point_id']);
        $trip = isset($data['trip_id']) ? Trip::where('uuid', $data['trip_id'])->first() : null;
        $stop = isset($data['trip_stop_id']) ? TripStop::find($data['trip_stop_id']) : null;
        Log::info('Scan attempt', ['serial' => $data['serial'] ?? 'none']);

        try {
            $result = $this->scanner->scan(
                serial: $data['serial'],
                dropOff: $dop,
                scanner: $request->user(),
                lat: (float) $data['lat'],
                lng: (float) $data['lng'],
                trip: $trip,
                tripStop: $stop,
                weightKg: $data['weight_kg'] ?? null,
                wasteType: $data['waste_type'] ?? null,
                photoPath: $data['photo_path'] ?? null,
                notes: $data['notes'] ?? null,
                scannedAt: isset($data['scanned_at']) ? Carbon::parse($data['scanned_at']) : null,
            );
        } catch (\Throwable $e) {
            Log::error('DEBUG: Scan Exception: '.$e->getMessage()."\n".$e->getTraceAsString());
            throw $e;
        }

        Log::info('DEBUG: Scan completed', ['accepted' => $result->accepted, 'reason' => $result->rejectReason ?? 'none']);

        if (! $result->accepted) {
            Log::warning('Scan rejected internally', ['serial' => $data['serial'], 'reason' => $result->rejectReason]);

            return $this->fail(
                'Scan rejected',
                ['reason' => [$result->rejectReason]],
                422,
            );
        }

        $res = [
            'serial' => $result->code->serial,
            'log_id' => $result->log->id,
            'status' => (string) $result->code->status,
        ];
        Log::info('Scan Response OK', $res);

        return $this->ok($res, 'Scan recorded');
    }

    /**
     * Bulk scan endpoint for offline sync. Each scan is processed
     * independently; failures don't abort the batch.
     */
    public function bulk(Request $request): JsonResponse
    {
        $data = $request->validate([
            'scans' => ['required', 'array', 'min:1', 'max:200'],
            'scans.*.serial' => ['required', 'string'],
            'scans.*.drop_off_point_id' => ['required', 'integer', 'exists:drop_off_points,id'],
            'scans.*.lat' => ['required', 'numeric'],
            'scans.*.lng' => ['required', 'numeric'],
            'scans.*.trip_id' => ['nullable', 'string'],
            'scans.*.trip_stop_id' => ['nullable', 'integer'],
            'scans.*.scanned_at' => ['nullable', 'date'],
        ]);

        $results = [];
        foreach ($data['scans'] as $i => $s) {
            try {
                $dop = DropOffPoint::find($s['drop_off_point_id']);
                if (! $dop) {
                    $results[] = ['index' => $i, 'serial' => $s['serial'], 'accepted' => false, 'reason' => 'dop_not_found'];

                    continue;
                }
                $trip = isset($s['trip_id']) ? Trip::where('uuid', $s['trip_id'])->first() : null;
                $stop = isset($s['trip_stop_id']) ? TripStop::find($s['trip_stop_id']) : null;

                $r = $this->scanner->scan(
                    serial: $s['serial'],
                    dropOff: $dop,
                    scanner: $request->user(),
                    lat: (float) $s['lat'],
                    lng: (float) $s['lng'],
                    trip: $trip,
                    tripStop: $stop,
                    scannedAt: isset($s['scanned_at']) ? Carbon::parse($s['scanned_at']) : null,
                );
                $results[] = [
                    'index' => $i,
                    'serial' => $s['serial'],
                    'accepted' => $r->accepted,
                    'reason' => $r->rejectReason,
                ];
            } catch (\Throwable $e) {
                $results[] = ['index' => $i, 'serial' => $s['serial'], 'accepted' => false, 'reason' => 'exception'];
            }
        }

        $accepted = collect($results)->where('accepted', true)->count();

        return $this->ok([
            'results' => $results,
            'accepted_count' => $accepted,
            'rejected_count' => count($results) - $accepted,
        ], "Processed {$accepted} of ".count($results).' scans');
    }
}