<?php

namespace Longyi\RewardPoints\Http\Controllers\Admin;

use Illuminate\Http\Request;
use Webkul\Admin\Http\Controllers\Controller;
use Longyi\RewardPoints\Models\RewardPointHistory;
use Longyi\RewardPoints\Models\RewardPointCustomer;
use Carbon\Carbon;
use Maatwebsite\Excel\Facades\Excel;
use Longyi\RewardPoints\Exports\TransactionsExport;

class TransactionController extends Controller
{
    protected $_config;

    public function __construct()
    {
        $this->_config = request('_config') ?: [];
    }

    public function earnedIndex()
    {
        request()->merge(['view_type' => 'earned']);
        return $this->index();
    }

    /**
     * Display a listing of reward point transactions
     */
    public function index()
    {
        $startDate = request()->get('start_date', Carbon::now()->subDays(30)->format('Y-m-d'));
        $endDate = request()->get('end_date', Carbon::now()->format('Y-m-d'));
        $customerEmail = request()->get('customer_email');
        $transactionType = request()->get('transaction_type');
        $amountType = request()->get('amount_type'); // all, earned, redeemed
        $viewType = request()->get('view_type', 'all'); // all or earned

        $query = RewardPointHistory::with('customer');

        // 日期筛选
        if ($startDate && $endDate) {
            $startDateTime = Carbon::parse($startDate)->startOfDay();
            $endDateTime = Carbon::parse($endDate)->endOfDay();
            $query->whereBetween('transaction_time', [$startDateTime, $endDateTime]);
        }

        // 客户邮箱筛选
        if ($customerEmail) {
            $query->whereHas('customer', function ($q) use ($customerEmail) {
                $q->where('email', 'like', "%{$customerEmail}%");
            });
        }

        // 交易类型筛选
        if ($transactionType !== null && $transactionType !== '') {
            $query->where('type_of_transaction', $transactionType);
        }

        // 根据视图类型筛选（仅获取或全部）
        if ($viewType === 'earned') {
            $query->where('amount', '>', 0);
        } elseif ($amountType === 'earned') {
            $query->where('amount', '>', 0);
        } elseif ($amountType === 'redeemed') {
            $query->where('amount', '<', 0);
        }

        $transactions = $query->orderBy('transaction_time', 'desc')->paginate(20);

        // 统计数据 - 根据视图类型调整
        if ($viewType === 'earned') {
            $totalEarned = (clone $query)->sum('amount');
            $totalRedeemed = 0;
            $totalTransactions = (clone $query)->count();
        } else {
            $totalEarned = (clone $query)->where('amount', '>', 0)->sum('amount');
            $totalRedeemed = abs((clone $query)->where('amount', '<', 0)->sum('amount'));
            $totalTransactions = (clone $query)->count();
        }

        $view = isset($this->_config['view']) ? $this->_config['view'] : 'rewardpoints::admin.transactions.index';

        return view($view, compact(
            'transactions',
            'startDate',
            'endDate',
            'customerEmail',
            'transactionType',
            'amountType',
            'viewType',
            'totalEarned',
            'totalRedeemed',
            'totalTransactions'
        ));
    }

    /**
     * Export transactions
     */
    public function export(Request $request)
    {
        $startDate = $request->get('start_date', Carbon::now()->subDays(30)->format('Y-m-d'));
        $endDate = $request->get('end_date', Carbon::now()->format('Y-m-d'));
        $customerEmail = $request->get('customer_email');
        $transactionType = $request->get('transaction_type');
        $amountType = $request->get('amount_type');

        $query = RewardPointHistory::with('customer');

        // 应用相同的筛选条件
        if ($startDate && $endDate) {
            $startDateTime = Carbon::parse($startDate)->startOfDay();
            $endDateTime = Carbon::parse($endDate)->endOfDay();
            $query->whereBetween('transaction_time', [$startDateTime, $endDateTime]);
        }

        if ($customerEmail) {
            $query->whereHas('customer', function ($q) use ($customerEmail) {
                $q->where('email', 'like', "%{$customerEmail}%");
            });
        }

        if ($transactionType !== null && $transactionType !== '') {
            $query->where('type_of_transaction', $transactionType);
        }

        if ($amountType === 'earned') {
            $query->where('amount', '>', 0);
        } elseif ($amountType === 'redeemed') {
            $query->where('amount', '<', 0);
        }

        $transactions = $query->orderBy('transaction_time', 'desc')->get();

        $filename = "reward_point_transactions_" . date('Y-m-d_His') . ".csv";

        $headers = [
            'Content-Type' => 'text/csv',
            'Content-Disposition' => "attachment; filename={$filename}",
        ];

        $callback = function() use ($transactions) {
            $file = fopen('php://output', 'w');

            // CSV 头部
            fputcsv($file, [
                'ID',
                'Customer ID',
                'Customer Name',
                'Customer Email',
                'Transaction Type',
                'Amount',
                'Balance',
                'Transaction Time',
                'Description',
                'Status'
            ]);

            $typeNames = [
                1 => 'Order',
                2 => 'Registration',
                3 => 'Product Review',
                4 => 'Daily Sign In',
                5 => 'Referral',
                6 => 'Birthday',
                8 => 'Subscribe',
                0 => 'Admin Adjustment',
                99 => 'Admin Action'
            ];

            $statusNames = [
                0 => 'Pending',
                1 => 'Completed',
                2 => 'Cancelled',
                3 => 'Expired'
            ];

            foreach ($transactions as $transaction) {
                fputcsv($file, [
                    $transaction->history_id,
                    $transaction->customer_id,
                    $transaction->customer ? $transaction->customer->first_name . ' ' . $transaction->customer->last_name : 'N/A',
                    $transaction->customer ? $transaction->customer->email : 'N/A',
                    $typeNames[$transaction->type_of_transaction] ?? 'Unknown',
                    $transaction->amount,
                    $transaction->balance,
                    $transaction->transaction_time,
                    $transaction->transaction_detail,
                    $statusNames[$transaction->status] ?? 'Unknown'
                ]);
            }

            fclose($file);
        };

        return response()->stream($callback, 200, $headers);
    }
}