<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Teacher;
use App\Models\University;
use App\Support\ApiResponse;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class UniversityController extends Controller
{
    use ApiResponse;

    public function index(Request $request): JsonResponse
    {
        $query = University::query()->where('status', 1);

        if ($kw = $request->query('keyword')) {
            $query->where(function ($q) use ($kw) {
                $q->where('name', 'like', "%{$kw}%")
                    ->orWhere('city', 'like', "%{$kw}%")
                    ->orWhere('province', 'like', "%{$kw}%")
                    ->orWhere('latitude', 'like', "%{$kw}%")
                    ->orWhere('longitude', 'like', "%{$kw}%");
            });
        }
        if ($request->filled('city')) {
            $query->where('city', 'like', '%'.$request->query('city').'%');
        }
        if ($request->filled('region')) {
            $region = $request->query('region');
            $query->where(function ($q) use ($region) {
                $q->where('city', 'like', "%{$region}%")
                    ->orWhere('province', 'like', "%{$region}%");
            });
        }

        $paginator = $query
            ->orderBy('name')
            ->paginate((int) $request->query('page_size', $request->boolean('simple') ? 50 : 20))
            ->withQueryString();

        $paginator->getCollection()->transform(fn (University $u) => $this->serialize($u));

        return $this->paginated($paginator);
    }

    public function store(Request $request): JsonResponse
    {
        $data = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'province' => ['nullable', 'string', 'max:64'],
            'city' => ['nullable', 'string', 'max:64'],
            'latitude' => ['nullable', 'numeric', 'between:-90,90'],
            'longitude' => ['nullable', 'numeric', 'between:-180,180'],
            'address' => ['nullable', 'string', 'max:512'],
            'remark' => ['nullable', 'string'],
        ]);

        $row = University::query()->create([
            'name' => $data['name'],
            'province' => $data['province'] ?? null,
            'city' => $data['city'] ?? null,
            'latitude' => $data['latitude'] ?? null,
            'longitude' => $data['longitude'] ?? null,
            'address' => $data['address'] ?? null,
            'remark' => $data['remark'] ?? null,
            'status' => 1,
        ]);

        return $this->ok($this->serialize($row), '已创建');
    }

    public function update(Request $request, int $university): JsonResponse
    {
        $row = University::query()->where('status', 1)->findOrFail($university);
        $data = $request->validate([
            'name' => ['sometimes', 'string', 'max:255'],
            'province' => ['nullable', 'string', 'max:64'],
            'city' => ['nullable', 'string', 'max:64'],
            'latitude' => ['sometimes', 'numeric', 'between:-90,90'],
            'longitude' => ['sometimes', 'numeric', 'between:-180,180'],
            'address' => ['nullable', 'string', 'max:512'],
            'remark' => ['nullable', 'string'],
        ]);

        $row->fill($data);
        $row->save();

        return $this->ok($this->serialize($row->fresh()), '已保存');
    }

    public function destroy(int $university): JsonResponse
    {
        $row = University::query()->findOrFail($university);
        if (Teacher::query()->where('university_id', $row->id)->exists()) {
            return $this->fail('该高校下仍有老师，无法删除', 422);
        }

        $row->delete();

        return $this->ok(null, '已删除');
    }

    /**
     * @return array<string, mixed>
     */
    protected function serialize(University $u): array
    {
        return [
            'id' => $u->id,
            'name' => $u->name,
            'province' => $u->province,
            'city' => $u->city,
            'latitude' => $u->latitude !== null ? (float) $u->latitude : null,
            'longitude' => $u->longitude !== null ? (float) $u->longitude : null,
            'address' => $u->address,
            'remark' => $u->remark,
        ];
    }
}