<?php

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

use App\Http\Controllers\Api\V1\ApiController;
use App\Http\Requests\Team\StoreTruckRequest;
use App\Http\Resources\TruckResource;
use App\Models\CollectionTeam;
use App\Models\Trip;
use App\Models\Truck;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class AdminTruckController extends ApiController
{
    public function index(Request $request): JsonResponse
    {
        $request->validate([
            'status' => ['nullable', 'in:active,maintenance,retired'],
            'q' => ['nullable', 'string', 'max:100'],
            'per_page' => ['nullable', 'integer', 'min:1', 'max:500'],
        ]);

        $perPage = (int) $request->input('per_page', 25);

        $trucks = Truck::query()
            ->when($request->filled('status'), fn ($q) => $q->where('status', $request->string('status')))
            ->when($request->filled('q'), function ($q) use ($request) {
                $term = '%'.$request->string('q').'%';
                $q->where(fn ($qq) => $qq->where('plate_number', 'like', $term)->orWhere('model', 'like', $term));
            })
            ->orderBy('plate_number')
            ->paginate($perPage);

        return $this->ok(
            TruckResource::collection($trucks),
            null,
            [
                'page' => $trucks->currentPage(),
                'per_page' => $trucks->perPage(),
                'total' => $trucks->total(),
                'last_page' => $trucks->lastPage(),
            ],
        );
    }

    public function store(StoreTruckRequest $request): JsonResponse
    {
        $truck = Truck::create($request->validated());

        return $this->created(new TruckResource($truck), 'Truck created');
    }

    public function show(Truck $truck): JsonResponse
    {
        return $this->ok(new TruckResource($truck));
    }

    public function update(StoreTruckRequest $request, Truck $truck): JsonResponse
    {
        $validated = $request->validated();
        $oldStatus = $truck->status;
        $newStatus = $validated['status'] ?? $oldStatus;

        DB::transaction(function () use ($truck, $validated, $oldStatus, $newStatus) {
            $truck->update($validated);

            if ($newStatus !== Truck::STATUS_ACTIVE && $oldStatus === Truck::STATUS_ACTIVE) {
                // 1. Cancel active/scheduled trips
                $trips = Trip::where('truck_id', $truck->id)
                    ->whereIn('status', [Trip::STATUS_SCHEDULED, Trip::STATUS_IN_PROGRESS, Trip::STATUS_AT_DUMPSITE])
                    ->get();

                foreach ($trips as $trip) {
                    $trip->update([
                        'status' => Trip::STATUS_CANCELLED,
                        'notes' => trim(($trip->notes ?? '')."\nSystem: Trip cancelled because the truck was moved to ".$newStatus.' status.'),
                    ]);
                }

                // 2. Unassign from collection teams
                CollectionTeam::where('truck_id', $truck->id)
                    ->update(['truck_id' => null]);
            }
        });

        return $this->ok(new TruckResource($truck->fresh()), 'Truck updated');
    }

    public function destroy(Truck $truck): JsonResponse
    {
        $truck->delete();

        return $this->ok(null, 'Truck deleted');
    }
}