<?php

namespace App\Http\Controllers\Admin;

use App\Loan;
use App\UsersWallet;
use App\AccountLog;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class LoanController extends Controller
{
    public function index()
    {
        return view('manages.loan.index');
    }

    public function list(Request $request)
    {
        $limit = $request->input('limit', 20);
        $status = $request->input('status', '');

        $query = Loan::query()
            ->leftJoin('users', 'loan.user_id', '=', 'users.id')
            ->select('loan.*', 'users.phone as user_phone', 'users.email as user_email', 'users.account_number');

        if ($status !== '') {
            $query->where('loan.status', $status);
        }

        $keyword = $request->input('keyword');
        if ($keyword) {
            $query->where(function ($q) use ($keyword) {
                $q->where('loan.user_id', $keyword)
                  ->orWhere('users.phone', 'like', "%{$keyword}%")
                  ->orWhere('users.email', 'like', "%{$keyword}%");
            });
        }

        $data = $query->orderBy('loan.id', 'desc')->paginate($limit);

        return $this->layuiData($data);
    }

    public function approve(Request $request)
    {
        $id = $request->input('id');
        $loan = Loan::find($id);
        if (!$loan) return $this->error('Loan not found');
        if ($loan->status != 0) return $this->error('Loan already processed');

        DB::beginTransaction();
        try {
            $wallet = UsersWallet::where('user_id', $loan->user_id)
                ->where('currency', 3)->lockForUpdate()->first();
            if (!$wallet) {
                DB::rollBack();
                return $this->error('User wallet not found');
            }

            $before = $wallet->legal_balance;
            $wallet->legal_balance = bc_add($wallet->legal_balance, $loan->amount, 6);
            $wallet->save();

            AccountLog::insertLog(
                [
                    'user_id' => $loan->user_id,
                    'value' => $loan->amount,
                    'created_time' => time(),
                    'info' => 'Loan Approved - ' . $loan->institution,
                    'type' => AccountLog::USER_LOAN_ORDER_BUY,
                    'currency' => 3,
                ],
                [
                    'balance_type' => 1,
                    'wallet_id' => $wallet->id,
                    'lock_type' => 0,
                    'before' => $before,
                    'change' => $loan->amount,
                    'after' => $wallet->legal_balance,
                    'create_time' => time(),
                ]
            );

            $loan->status = 1;
            $loan->update_time = now();
            $loan->save();

            DB::commit();
            return $this->success('Loan approved');
        } catch (\Exception $e) {
            DB::rollBack();
            return $this->error('Error: ' . $e->getMessage());
        }
    }

    public function reject(Request $request)
    {
        $id = $request->input('id');
        $remark = $request->input('remark', '');
        $loan = Loan::find($id);
        if (!$loan) return $this->error('Loan not found');
        if ($loan->status != 0) return $this->error('Loan already processed');

        $loan->status = 2;
        $loan->remark = $remark;
        $loan->update_time = now();
        $loan->save();

        return $this->success('Loan rejected');
    }
}