<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\QrTeamMember;
use App\Models\User;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Http;
use Illuminate\Validation\ValidationException;

/**
 * Token login for the Ladill Mini mobile app.
 *
 * Mirrors the web "Sign in with Ladill" flow (SsoLoginController) but uses the
 * OAuth Resource Owner Password grant so the native app can collect the
 * credentials directly. On success we provision the same thin local user
 * mirror keyed by the OIDC `sub` and hand back a Sanctum personal access token
 * the app stores for `auth:sanctum` requests.
 */
class AuthController extends Controller
{
    public function login(Request $request): JsonResponse
    {
        $credentials = $request->validate([
            'email' => ['required', 'email'],
            'password' => ['required', 'string'],
            'device_name' => ['nullable', 'string', 'max:120'],
        ]);

        $issuer = rtrim((string) config('services.ladill_sso.issuer'), '/');

        $tokenRes = Http::asForm()->post($issuer.'/oauth/token', [
            'grant_type' => 'password',
            'client_id' => (string) config('services.ladill_sso.client_id'),
            'client_secret' => (string) config('services.ladill_sso.client_secret'),
            'username' => $credentials['email'],
            'password' => $credentials['password'],
            'scope' => 'openid profile email',
        ]);

        if ($tokenRes->failed()) {
            throw ValidationException::withMessages([
                'email' => ['The email or password is incorrect.'],
            ]);
        }

        $user = $this->provisionFromAccessToken($issuer, (string) $tokenRes->json('access_token'));

        if (! $user) {
            throw ValidationException::withMessages([
                'email' => ['We could not verify your Ladill account. Please try again.'],
            ]);
        }

        QrTeamMember::linkPendingInvitesFor($user);

        $deviceName = $credentials['device_name'] ?? 'Ladill Mini Android';
        $token = $user->createToken($deviceName, ['mini:read', 'mini:write']);

        return response()->json([
            'data' => [
                'token' => $token->plainTextToken,
                'user' => $this->presentUser($user),
            ],
        ]);
    }

    public function logout(Request $request): JsonResponse
    {
        $token = $request->user()?->currentAccessToken();
        $token?->delete();

        return response()->json(['data' => ['message' => 'Signed out.']]);
    }

    public function me(Request $request): JsonResponse
    {
        return response()->json(['data' => $this->presentUser($request->user())]);
    }

    private function provisionFromAccessToken(string $issuer, string $accessToken): ?User
    {
        if ($accessToken === '') {
            return null;
        }

        $claims = Http::withToken($accessToken)->acceptJson()->get($issuer.'/oauth/userinfo');

        if ($claims->failed() || ! $claims->json('sub')) {
            return null;
        }

        $email = (string) ($claims->json('email') ?: '');

        return User::updateOrCreate(
            ['public_id' => (string) $claims->json('sub')],
            [
                'name' => $claims->json('name'),
                'email' => $email !== '' ? $email : (string) $claims->json('sub').'@users.ladill.com',
                'avatar_url' => $claims->json('picture'),
            ],
        );
    }

    /** @return array<string, mixed> */
    private function presentUser(User $user): array
    {
        $account = ladill_account();

        return [
            'id' => $user->id,
            'public_id' => $user->public_id,
            'name' => $user->name,
            'email' => $user->email,
            'avatar_url' => $user->avatarUrl(),
            'acting_account' => [
                'id' => $account->id,
                'public_id' => $account->public_id,
                'name' => $account->name,
                'email' => $account->email,
            ],
            'accessible_account_ids' => $user->accessibleAccounts()->pluck('id')->values(),
        ];
    }
}