<?php

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

use App\Http\Controllers\Api\V1\ApiController;
use App\Http\Requests\Dumpsite\StoreDumpsiteRequest;
use App\Http\Requests\Dumpsite\UpdateDumpsiteRequest;
use App\Http\Resources\DumpsiteResource;
use App\Models\Dumpsite;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use MatanYadaev\EloquentSpatial\Objects\LineString;
use MatanYadaev\EloquentSpatial\Objects\Point;
use MatanYadaev\EloquentSpatial\Objects\Polygon;

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

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

        $dumpsites = Dumpsite::query()
            ->with('cityMunicipality')
            ->when($request->filled('status'), fn ($q) => $q->where('status', $request->string('status')))
            ->when(
                $request->filled('city_municipality_id'),
                fn ($q) => $q->where('city_municipality_id', $request->integer('city_municipality_id')),
            )
            ->when($request->filled('q'), function ($q) use ($request) {
                $term = '%'.$request->string('q').'%';
                $q->where(fn ($qq) => $qq->where('name', 'like', $term)
                    ->orWhere('code', 'like', $term)
                    ->orWhere('address_line', 'like', $term));
            })
            ->orderBy('name')
            ->paginate($perPage);

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

    public function store(StoreDumpsiteRequest $request): JsonResponse
    {
        $data = $request->validated();

        $payload = $this->mapPayload($data);
        $payload['name'] = $data['name'];
        $payload['code'] = $data['code'];
        $payload['address_line'] = $data['address_line'];
        $payload['city_municipality_id'] = $data['city_municipality_id'] ?? null;
        $payload['accepted_waste_types'] = $data['accepted_waste_types'] ?? null;
        $payload['operating_hours'] = $data['operating_hours'] ?? null;
        $payload['capacity_tons'] = $data['capacity_tons'] ?? null;
        $payload['contact_person'] = $data['contact_person'] ?? null;
        $payload['contact_phone'] = $data['contact_phone'] ?? null;
        $payload['permit_number'] = $data['permit_number'] ?? null;
        $payload['status'] = $data['status'] ?? Dumpsite::STATUS_ACTIVE;

        $dumpsite = Dumpsite::create($payload);

        return $this->created(
            new DumpsiteResource($dumpsite->fresh()->load('cityMunicipality')),
            'Dumpsite created',
        );
    }

    public function show(Dumpsite $dumpsite): JsonResponse
    {
        $dumpsite->load('cityMunicipality.province.region');

        return $this->ok(new DumpsiteResource($dumpsite));
    }

    public function update(UpdateDumpsiteRequest $request, Dumpsite $dumpsite): JsonResponse
    {
        $data = $request->validated();
        $payload = $this->mapPayload($data);

        // Carry through scalar/json fields that mapPayload doesn't touch.
        foreach ([
            'name', 'code', 'address_line', 'city_municipality_id',
            'accepted_waste_types', 'operating_hours', 'capacity_tons',
            'contact_person', 'contact_phone', 'permit_number', 'status',
        ] as $key) {
            if (array_key_exists($key, $data)) {
                $payload[$key] = $data[$key];
            }
        }

        $dumpsite->update($payload);

        return $this->ok(
            new DumpsiteResource($dumpsite->fresh()->load('cityMunicipality')),
            'Dumpsite updated',
        );
    }

    public function destroy(Dumpsite $dumpsite): JsonResponse
    {
        $dumpsite->delete();

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

    /**
     * Translate lat/lng + boundary_polygon[{lat,lng}, ...] inputs into
     * spatial Polygon/Point objects suitable for assignment to the model.
     */
    private function mapPayload(array $data): array
    {
        $payload = [];

        if (isset($data['lat'], $data['lng'])) {
            $payload['coordinates'] = new Point((float) $data['lat'], (float) $data['lng'], 4326);
        }

        if (array_key_exists('boundary_polygon', $data)) {
            $payload['boundary_polygon'] = $data['boundary_polygon']
                ? $this->buildPolygon($data['boundary_polygon'])
                : null;
        }

        return $payload;
    }

    private function buildPolygon(array $points): Polygon
    {
        $ring = array_map(
            fn ($p) => new Point((float) $p['lat'], (float) $p['lng'], 4326),
            $points,
        );

        $first = $ring[0];
        $last = $ring[count($ring) - 1];
        if ($first->latitude !== $last->latitude || $first->longitude !== $last->longitude) {
            $ring[] = new Point($first->latitude, $first->longitude, 4326);
        }

        return new Polygon([new LineString($ring)], 4326);
    }
}