<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;

class SetupController extends Controller
{
    public function index()
    {
        $status = [
            'pgcrypto' => $this->checkPgcrypto(),
            'pegawai_columns' => $this->checkPegawaiColumns(),
            'users_view' => $this->checkUsersView(),
            'veri_time' => Schema::hasColumn('transaksi_parkir', 'veri_time'),
        ];

        return view('welcome', compact('status'));
    }

    public function run()
    {
        DB::beginTransaction();

        try {
            // 1. pgcrypto
            if (!$this->checkPgcrypto()) {
                DB::statement('CREATE EXTENSION IF NOT EXISTS pgcrypto');
            }

            // 2. Kolom tabel pegawai
            $this->ensurePegawaiColumn('id', "ALTER TABLE pegawai ADD COLUMN id SERIAL PRIMARY KEY");
            $this->ensurePegawaiColumn('email', "ALTER TABLE pegawai ADD COLUMN email VARCHAR(64)");
            $this->ensurePegawaiColumn('email_verified_at', "ALTER TABLE pegawai ADD COLUMN email_verified_at VARCHAR(64)");
            $this->ensurePegawaiColumn('remember_token', "ALTER TABLE pegawai ADD COLUMN remember_token VARCHAR(64)");

            // 3. View users
            if (!$this->checkUsersView()) {
                DB::statement("
                    CREATE OR REPLACE VIEW users AS
                    SELECT 
                        id,
                        nomer,
                        nama,
                        username,
                        crypt(password, gen_salt('bf')) AS password,
                        email,
                        email_verified_at,
                        foto,
                        bisalogin,
                        status,
                        statusabsen,
                        level_pegawai,
                        remember_token
                    FROM pegawai
                ");
            }

            // 4. Kolom veri_time
            if (!Schema::hasColumn('transaksi_parkir', 'veri_time')) {
                Schema::table('transaksi_parkir', function ($table) {
                    $table->timestamp('veri_time')->nullable();
                });
            }

            DB::commit();

            // return redirect()->back()->with('success', 'Setup berhasil dijalankan ✅');
            return response()->json([
                'success' => true,
                'redirect' => url('/login') // ganti ke /dashboard kalau mau
            ]);

        } catch (\Throwable $e) {
            DB::rollBack();
            // return redirect()->back()->with('error', $e->getMessage());
            return response()->json([
                'success' => false,
                'message' => $e->getMessage()
            ], 500);
        }
    }

    /* =========================
       Helper
       ========================= */

    private function checkPgcrypto()
    {
        $result = DB::select("
            SELECT 1 
            FROM pg_extension 
            WHERE extname = 'pgcrypto'
        ");

        return !empty($result);
    }

    private function checkPegawaiColumns()
    {
        return [
            'id' => Schema::hasColumn('pegawai', 'id'),
            'email' => Schema::hasColumn('pegawai', 'email'),
            'email_verified_at' => Schema::hasColumn('pegawai', 'email_verified_at'),
            'remember_token' => Schema::hasColumn('pegawai', 'remember_token'),
        ];
    }

    private function checkUsersView()
    {
        $result = DB::select("
            SELECT 1 
            FROM information_schema.views 
            WHERE table_name = 'users'
        ");

        return !empty($result);
    }

    private function ensurePegawaiColumn($column, $sql)
    {
        if (!Schema::hasColumn('pegawai', $column)) {
            DB::statement($sql);
        }
    }
}