<?php

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

use App\Http\Controllers\Api\V1\ApiController;
use App\Http\Requests\Auth\RegisterRequest;
use App\Http\Resources\UserResource;
use App\Models\Household;
use App\Models\HouseholdMember;
use App\Models\NotificationPreference;
use App\Models\OtpCode;
use App\Models\User;
use App\Services\DropOff\DropOffPointFinder;
use App\Services\Otp\OtpService;
use App\Tenancy\Tenancy;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use MatanYadaev\EloquentSpatial\Objects\Point;

class RegisterController extends ApiController
{
    public function __invoke(RegisterRequest $request, OtpService $otp, DropOffPointFinder $dopFinder): JsonResponse
    {
        $data = $request->validated();

        // Tenant gate. New residents always belong to one LGU; the
        // ResolveTenant middleware sets it from the X-Tenant-Code header.
        $tenant = Tenancy::current();
        if (! $tenant) {
            return $this->fail('Pick your LGU first.', ['tenant' => ['LGU code required']], 400);
        }

        $user = DB::transaction(function () use ($data, $tenant, $dopFinder) {
            $user = User::create([
                'tenant_id' => $tenant->id,
                'first_name' => $data['first_name'],
                'middle_name' => $data['middle_name'] ?? null,
                'last_name' => $data['last_name'],
                'email' => $data['email'],
                'phone' => $data['phone'],
                'password' => Hash::make($data['password']),
                'role' => $data['role'],
                'status' => User::STATUS_PENDING,
                'preferred_language' => $data['preferred_language'] ?? 'en',
            ]);

            $user->assignRole($data['role']);

            $profileClass = User::profileModelForRole($data['role']);
            if ($profileClass) {
                $profileClass::create(['user_id' => $user->id]);
            }

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

            if ($data['role'] === User::ROLE_RESIDENT) {
                $point = new Point((float) $data['lat'], (float) $data['lng'], 4326);
                $nearestDop = $dopFinder->nearest((float) $data['lat'], (float) $data['lng']);

                $household = Household::create([
                    'tenant_id' => $tenant->id,
                    'head_user_id' => $user->id,
                    'barangay_id' => $data['barangay_id'] ?? null,
                    'address_line' => $data['address_line'],
                    'coordinates' => $point,
                    'household_size' => $data['household_size'] ?? 1,
                    'assigned_drop_off_point_id' => $nearestDop?->id,
                    'verification_status' => Household::VERIFICATION_PENDING,
                ]);

                HouseholdMember::create([
                    'household_id' => $household->id,
                    'user_id' => $user->id,
                    'relationship' => HouseholdMember::RELATIONSHIP_HEAD,
                    'full_name' => $user->full_name,
                ]);

                app(\App\Services\Qr\QrAllocator::class)->allocateFreeToHousehold($household);
            }

            return $user;
        });

        $issue = $otp->issue(
            destination: $user->phone,
            purpose: OtpCode::PURPOSE_REGISTER,
            user: $user,
        );

        // Fire-and-forget email verification link. If the mail backend is
        // misconfigured we don't block registration.
        try {
            $user->sendEmailVerificationNotification();
        } catch (\Throwable $e) {
            \Log::warning('Failed to send verification email', [
                'user_id' => $user->id, 'error' => $e->getMessage(),
            ]);
        }

        return $this->created([
            'user' => new UserResource($user),
            'otp_sent' => $issue->issued,
            'otp_destination' => $user->phone,
            'debug_code' => app()->environment('local', 'testing') ? $issue->plainCode : null,
        ], 'Registration successful. Verify the OTP sent to your phone.');
    }
}