<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\DB;

class ApiAuthController extends Controller
{
    public function login(Request $request)
    {
        try {
            $request->validate([
                'nik' => 'required',
                'password' => 'required'
            ]);

            $user = User::where('nik', $request->nik)->first();

            if ($user && Hash::check($request->password, $user->password)) {
                $user->tokens()->delete();

                $token = $user->createToken('auth_token')->plainTextToken;
                $jkDisplay = "";
                if ($user->jenis_kelamin == 'L') {
                    $jkDisplay = 'Laki-laki';
                } elseif ($user->jenis_kelamin == 'P') {
                    $jkDisplay = 'Perempuan';
                }

                $isComplete = !empty($user->nama_lengkap) &&
                    !empty($user->email) &&
                    !empty($user->no_telp) &&
                    !empty($user->alamat) &&
                    !empty($user->jenis_kelamin) &&
                    !empty($user->nama_fasyankes);

                return response()->json([
                    'success' => true,
                    'token' => $token,
                    'is_profile_complete' => $isComplete,
                    'user' => [
                        'id_user' => $user->id_user,
                        'nik' => $user->nik,
                        'role' => $user->role,
                        'nama_lengkap' => $user->nama_lengkap ?? "",
                        'email' => $user->email ?? "",
                        'no_telp' => $user->no_telp ?? "",
                        'alamat' => $user->alamat ?? "",
                        'tgl_lahir' => $user->tgl_lahir ?? "",
                        'jenis_kelamin' => $jkDisplay,
                        'nama_fasyankes' => $user->nama_fasyankes ?? "",
                    ]
                ], 200);
            }

            return response()->json([
                'success' => false,
                'message' => 'NIK atau Password salah!'
            ], 401);
        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Error Server: ' . $e->getMessage()
            ], 500);
        }
    }

    public function switchAccount(Request $request)
    {
        $request->validate(['nik' => 'required']);

        $user = User::where('nik', $request->nik)->first();

        if (!$user) {
            return response()->json([
                'success' => false,
                'message' => 'Akun tidak ditemukan'
            ], 404);
        }

        $jkDisplay = "";
        if ($user->jenis_kelamin == 'L') {
            $jkDisplay = 'Laki-laki';
        } elseif ($user->jenis_kelamin == 'P') {
            $jkDisplay = 'Perempuan';
        }

        return response()->json([
            'success' => true,
            'message' => 'Akun valid',
            'user' => [
                'id_user' => $user->id_user,
                'nik' => $user->nik,
                'role' => $user->role,
                'nama_lengkap' => $user->nama_lengkap ?? "",
                'email' => $user->email ?? "",
                'no_telp' => $user->no_telp ?? "",
                'alamat' => $user->alamat ?? "",
                'tgl_lahir' => $user->tgl_lahir ?? "",
                'jenis_kelamin' => $jkDisplay,
                'nama_fasyankes' => $user->nama_fasyankes ?? "",
            ]
        ], 200);
    }
    public function register(Request $request)
    {
        $request->validate([
            'nik' => 'required|unique:users,nik|digits:16',
            'email' => 'required|email',
            'password' => 'required|min:8'
        ]);

        try {
            $isPasienMedis = DB::table('pasien_medis')
                ->join('users', 'pasien_medis.id_user', '=', 'users.id_user')
                ->where('users.nik', $request->nik)
                ->exists();

            $assignedRole = $isPasienMedis ? 'pasien' : 'umum';

            $user = User::create([
                'nik' => $request->nik,
                'password' => Hash::make($request->password),
                'role' => $assignedRole,
                'nama_lengkap' => "",
                'email' => $request->email,
                'no_telp' => "",
                'alamat' => "",
                'tgl_lahir' => '2000-01-01',
            ]);

            return response()->json([
                'success' => true,
                'message' => 'Registrasi berhasil sebagai ' . $assignedRole . '! Silakan login.',
            ], 201);
        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Gagal registrasi: ' . $e->getMessage()
            ], 500);
        }
    }

    public function updateProfile(Request $request)
    {
        $request->validate([
            'nik' => 'required',
            'nama_lengkap' => 'required|string',
            'email' => 'nullable|email',
            'no_telp' => 'required',
            'alamat' => 'required|string',
            'tgl_lahir' => 'required',
            'jenis_kelamin' => 'nullable',
            'nama_fasyankes' => 'nullable',
            'current_password' => 'nullable',
            'password' => 'nullable|min:8',
        ]);

        $user = User::where('nik', $request->nik)->first();

        if ($user) {
            $user->nama_lengkap = $request->nama_lengkap;
            if ($request->filled('email')) {
                $user->email = $request->email;
            }
            $user->no_telp = $request->no_telp;
            $user->alamat = $request->alamat;
            $user->tgl_lahir = $request->tgl_lahir;

            // OTOMATIS KONVERSI SAAT SIMPAN: Laki-laki -> L, Perempuan -> P
            if ($request->jenis_kelamin == 'Laki-laki') {
                $user->jenis_kelamin = 'L';
            } elseif ($request->jenis_kelamin == 'Perempuan') {
                $user->jenis_kelamin = 'P';
            } else {
                $user->jenis_kelamin = $request->jenis_kelamin;
            }

            $user->nama_fasyankes = $request->nama_fasyankes;


            if ($request->filled('password')) {

                // VALIDASI PASSWORD SAAT INI
                if (!$request->filled('current_password')) {
                    return response()->json([
                        'success' => false,
                        'message' => 'Password saat ini wajib diisi'
                    ], 400);
                }

                // CEK PASSWORD LAMA
                if (!Hash::check($request->current_password, $user->password)) {
                    return response()->json([
                        'success' => false,
                        'message' => 'Password saat ini salah'
                    ], 400);
                }

                // SIMPAN PASSWORD BARU
                $user->password = Hash::make($request->password);
            }

            $user->save();

            $user->save();

            $isComplete = !empty($user->nama_lengkap) &&
                !empty($user->email) &&
                !empty($user->no_telp) &&
                !empty($user->alamat) &&
                !empty($user->jenis_kelamin) &&
                !empty($user->nama_fasyankes);

            return response()->json([
                'success' => true,
                'message' => 'Profil berhasil diperbarui',
                'user' => $user,
                'is_profile_complete' => $isComplete
            ], 200);
        }

        return response()->json([
            'success' => false,
            'message' => 'User tidak ditemukan'
        ], 404);
    }

    public function getProfile(Request $request)
    {
        $nik = $request->query('nik');
        $user = User::where('nik', $nik)->first();

        if ($user) {
            // Konversi L/P database ke teks lengkap untuk Flutter
            $jkDisplay = "";
            if ($user->jenis_kelamin == 'L') {
                $jkDisplay = 'Laki-laki';
            } elseif ($user->jenis_kelamin == 'P') {
                $jkDisplay = 'Perempuan';
            }

            return response()->json([
                'success' => true,
                'user' => [
                    'id_user' => $user->id_user, // WAJIB ADA INI
                    'nik' => $user->nik,
                    'nama_lengkap' => $user->nama_lengkap ?? "",
                    'email' => $user->email ?? "",
                    'no_telp' => $user->no_telp ?? "",
                    'alamat' => $user->alamat ?? "",
                    'tgl_lahir' => $user->tgl_lahir ?? "",
                    'jenis_kelamin' => $jkDisplay,
                    'nama_fasyankes' => $user->nama_fasyankes ?? "",
                    'role' => $user->role ?? ""
                ]
            ], 200);
        }

        return response()->json([
            'success' => false,
            'message' => 'User tidak ditemukan'
        ], 404);
    }

    public function completeProfile(Request $request)
    {
        return $this->updateProfile($request);
    }

    public function forgotPassword(Request $request)
    {
        $request->validate([
            'nik' => 'required',

            // DIUBAH: no_telp menjadi email
            'email' => 'required|email',

            'tgl_lahir' => 'required',
            'password' => 'required|min:8'
        ]);

        $user = User::where('nik', $request->nik)

            // DIUBAH: pencocokan berdasarkan email
            ->where('email', $request->email)

            ->where('tgl_lahir', $request->tgl_lahir)
            ->first();

        if (!$user) {
            return response()->json([
                'success' => false,
                'message' => 'Data tidak cocok.'
            ], 404);
        }

        $user->password = Hash::make($request->password);
        $user->save();

        return response()->json([
            'success' => true,
            'message' => 'Password berhasil diperbarui. Silakan login.'
        ], 200);
    }
}