<?php

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

use App\Http\Controllers\Api\V1\ApiController;
use App\Http\Requests\SuperAdmin\StoreTenantRequest;
use App\Http\Resources\SuperAdmin\SuperAdminTenantResource;
use App\Models\NotificationPreference;
use App\Models\Tenant;
use App\Models\User;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use MatanYadaev\EloquentSpatial\Objects\LineString;
use MatanYadaev\EloquentSpatial\Objects\Point;
use MatanYadaev\EloquentSpatial\Objects\Polygon;

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

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

        $tenants = Tenant::query()
            ->with(['cityMunicipality.province.region'])
            ->withCount(['users', 'households', 'trucks', 'barangays'])
            ->when($request->filled('status'), fn ($q) => $q->where('status', $request->string('status')))
            ->when($request->filled('q'), function ($q) use ($request) {
                $term = '%'.$request->string('q').'%';
                $q->where(function ($qq) use ($term) {
                    $qq->where('name', 'like', $term)
                        ->orWhere('code', 'like', $term)
                        ->orWhere('short_name', 'like', $term);
                });
            })
            ->orderBy('name')
            ->paginate($perPage);

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

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

        $tenant = DB::transaction(function () use ($data) {
            $boundary = $this->buildPolygon($data['boundary_polygon']);

            $tenant = Tenant::create([
                'name' => $data['name'],
                'short_name' => $data['short_name'],
                'city_municipality_id' => $data['city_municipality_id'],
                'boundary_polygon' => $boundary,
                'theme_color' => $data['theme_color'] ?? '#16a34a',
                'logo_path' => $data['logo_path'] ?? null,
                'contact_email' => $data['contact_email'],
                'contact_phone' => $data['contact_phone'],
                'status' => $data['status'] ?? Tenant::STATUS_ONBOARDING,
                'timezone' => $data['timezone'] ?? 'Asia/Manila',
            ]);

            // Create default LGU admin account
            $user = User::create([
                'tenant_id' => $tenant->id,
                'first_name' => 'LGU',
                'last_name' => 'Admin',
                'email' => $data['admin_email'],
                'phone' => $data['contact_phone'],
                'password' => Hash::make($data['admin_password']),
                'role' => User::ROLE_ADMIN,
                'status' => User::STATUS_ACTIVE,
            ]);
            $user->assignRole(User::ROLE_ADMIN);

            NotificationPreference::create([
                'user_id' => $user->id,
                'language' => 'en',
            ]);

            return $tenant;
        });

        return $this->created(
            new SuperAdminTenantResource(
                $tenant->load(['cityMunicipality.province.region', 'users'])
            ),
            'LGU onboarded successfully'
        );
    }

    public function show(Tenant $tenant): JsonResponse
    {
        $tenant->load(['cityMunicipality.province.region', 'users']);
        $tenant->loadCount(['users', 'households', 'trucks', 'barangays']);

        return $this->ok(new SuperAdminTenantResource($tenant));
    }

    public function update(StoreTenantRequest $request, Tenant $tenant): JsonResponse
    {
        $data = $request->validated();

        DB::transaction(function () use ($tenant, $data) {
            $boundary = $this->buildPolygon($data['boundary_polygon']);

            $tenant->update([
                'name' => $data['name'],
                'short_name' => $data['short_name'],
                'city_municipality_id' => $data['city_municipality_id'],
                'boundary_polygon' => $boundary,
                'theme_color' => $data['theme_color'] ?? $tenant->theme_color,
                'logo_path' => $data['logo_path'] ?? $tenant->logo_path,
                'contact_email' => $data['contact_email'],
                'contact_phone' => $data['contact_phone'],
                'status' => $data['status'] ?? $tenant->status,
                'timezone' => $data['timezone'] ?? $tenant->timezone,
            ]);

            $admin = $tenant->users()->where('role', User::ROLE_ADMIN)->first();
            if (! $admin && ! empty($data['admin_email']) && ! empty($data['admin_password'])) {
                $admin = User::create([
                    'tenant_id' => $tenant->id,
                    'first_name' => 'LGU',
                    'last_name' => 'Admin',
                    'email' => $data['admin_email'],
                    'phone' => $data['contact_phone'],
                    'password' => Hash::make($data['admin_password']),
                    'role' => User::ROLE_ADMIN,
                    'status' => User::STATUS_ACTIVE,
                ]);
                $admin->assignRole(User::ROLE_ADMIN);
                NotificationPreference::create([
                    'user_id' => $admin->id,
                    'language' => 'en',
                ]);
            } elseif ($admin) {
                if (! empty($data['admin_email'])) {
                    // Ignore unique constraint on the same user
                    $existing = User::where('email', $data['admin_email'])->where('id', '!=', $admin->id)->first();
                    if (! $existing) {
                        $admin->email = $data['admin_email'];
                    }
                }
                if (! empty($data['admin_password'])) {
                    $admin->password = Hash::make($data['admin_password']);
                }
                if ($admin->isDirty('email') || $admin->isDirty('password')) {
                    $admin->save();
                }
            }
        });

        $tenant->load(['cityMunicipality.province.region', 'users']);
        $tenant->loadCount(['users', 'households', 'trucks', 'barangays']);

        return $this->ok(new SuperAdminTenantResource($tenant), 'LGU updated successfully');
    }

    public function destroy(Tenant $tenant): JsonResponse
    {
        $tenant->delete();

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

    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);
    }
}