<?php

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

use App\Http\Controllers\Api\V1\ApiController;
use App\Models\Trip;
use App\Models\Truck;
use App\Models\TruckLocationHistory;
use App\Services\LiveTracking\TruckTracker;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class AdminLiveTrackingController extends ApiController
{
    public function __construct(private readonly TruckTracker $tracker) {}

    public function trucks(): JsonResponse
    {
        return $this->ok([
            'trucks' => $this->tracker->activeTruckPositions(),
            'as_of' => now()->toIso8601String(),
        ]);
    }

    /**
     * Recent breadcrumb trail for a truck — last N pings within the
     * given window (default 30 minutes, max 4 hours). Used by the live
     * map to draw the actual path the truck has taken so far.
     */
    public function trail(Request $request, Truck $truck): JsonResponse
    {
        $data = $request->validate([
            'minutes' => ['nullable', 'integer', 'min:1', 'max:240'],
            'limit' => ['nullable', 'integer', 'min:1', 'max:1000'],
        ]);
        $minutes = (int) ($data['minutes'] ?? 30);
        $limit = (int) ($data['limit'] ?? 500);

        $rows = TruckLocationHistory::query()
            ->where('truck_id', $truck->id)
            ->where('recorded_at', '>=', now()->subMinutes($minutes))
            ->orderBy('recorded_at')
            ->limit($limit)
            ->get(['recorded_at', 'coordinates', 'heading_degrees', 'speed_kmh', 'trip_id']);

        return $this->ok([
            'truck_id' => $truck->uuid,
            'window_minutes' => $minutes,
            'points' => $rows->map(fn ($r) => [
                'lat' => $r->coordinates->latitude,
                'lng' => $r->coordinates->longitude,
                'heading_degrees' => $r->heading_degrees,
                'speed_kmh' => $r->speed_kmh,
                'recorded_at' => $r->recorded_at->toIso8601String(),
            ])->all(),
        ]);
    }

    /**
     * Find the truck's currently-running trip with full route + stops +
     * dumpsite + recent timeline. Powers the click-to-detail panel.
     */
    public function activeTrip(Truck $truck): JsonResponse
    {
        $trip = Trip::query()
            ->whereHas('team', fn ($q) => $q->where('truck_id', $truck->id))
            ->whereIn('status', [Trip::STATUS_IN_PROGRESS, Trip::STATUS_AT_DUMPSITE])
            ->orderByDesc('actual_start_time')
            ->with([
                'route', 'team',
                'dumpsite',
                'stops.dropOffPoint',
                'timelineEvents' => fn ($q) => $q->latest('event_at')->limit(20),
                'timelineEvents.recordedBy',
            ])
            ->first();

        if (! $trip) {
            return $this->ok(['active_trip' => null]);
        }

        $stops = $trip->stops->map(fn ($s) => [
            'id' => $s->id,
            'sequence' => $s->sequence,
            'status' => $s->status,
            'name' => $s->dropOffPoint?->name,
            'lat' => $s->dropOffPoint?->coordinates?->latitude,
            'lng' => $s->dropOffPoint?->coordinates?->longitude,
            'actual_arrival' => $s->actual_arrival?->toIso8601String(),
        ]);

        $dumpsite = $trip->dumpsite ? [
            'name' => $trip->dumpsite->name,
            'lat' => $trip->dumpsite->coordinates?->latitude,
            'lng' => $trip->dumpsite->coordinates?->longitude,
            'boundary' => $this->dumpsiteBoundary($trip->dumpsite),
        ] : null;

        return $this->ok([
            'active_trip' => [
                'id' => $trip->uuid,
                'trip_number' => $trip->trip_number,
                'status' => $trip->status,
                'started_at' => $trip->actual_start_time?->toIso8601String(),
                'route_name' => $trip->route?->name,
                'team_name' => $trip->team?->name,
                'total_load_kg' => $trip->total_load_kg,
                'stops' => $stops,
                'dumpsite' => $dumpsite,
                'timeline' => $trip->timelineEvents->map(fn ($e) => [
                    'event_type' => $e->event_type,
                    'event_at' => $e->event_at->toIso8601String(),
                    'notes' => $e->notes,
                ])->values(),
            ],
        ]);
    }

    private function dumpsiteBoundary($dumpsite): ?array
    {
        if (! $dumpsite->boundary_polygon) {
            return null;
        }

        $rings = $dumpsite->boundary_polygon->getGeometries();
        $ring = $rings->first();
        if (! $ring) {
            return null;
        }

        return $ring->getGeometries()
            ->map(fn ($p) => ['lat' => $p->latitude, 'lng' => $p->longitude])
            ->all();
    }
}