<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Modules\EcommerceFinance\AccountBillColumns;
use Modules\EcommerceFinance\JdBillPlatform;
use Modules\EcommerceFinance\Repositories\DewuSettlementBillRepository;
use Modules\EcommerceFinance\Repositories\JdDailyBillRepository;
use Modules\EcommerceFinance\Repositories\PinduoduoSettlementBillRepository;
use Modules\EcommerceFinance\Repositories\StoreReceivingAlipayBillMirrorRepository;
use Modules\EcommerceFinance\Repositories\StoreReceivingDewuBillMirrorRepository;
use Modules\EcommerceFinance\Repositories\StoreReceivingDouyinBillMirrorRepository;
use Modules\EcommerceFinance\Repositories\StoreReceivingJdWalletBillRepository;
use Modules\EcommerceFinance\Repositories\StoreReceivingPinduoduoBillMirrorRepository;
use Modules\EcommerceFinance\Repositories\TaobaoWechatSettlementBillRepository;
use Modules\EcommerceFinance\Services\AccountBillsExportTasks;
use Modules\EcommerceFinance\Services\AccountLedgerRemarkMap;
use Throwable;

/**
 * 后台执行「店铺收款账户账单」导出任务：生成 CSV 并更新任务状态，供页面列表下载。
 */
class RunAccountBillsExportTask extends Command
{
    protected $signature = 'account-bills:export-run {token : 导出任务 token}';

    protected $description = '执行店铺收款账户账单导出任务（后台进程调用）';

    public function handle(AccountBillsExportTasks $tasks, AccountLedgerRemarkMap $remarkMap): int
    {
        $token = (string) $this->argument('token');
        $task = $this->findTask($tasks, $token);
        if ($task === null) {
            $this->error('导出任务不存在：' . $token);

            return self::FAILURE;
        }

        $task = $tasks->patch($task, ['status' => 'running', 'started_at' => AccountBillsExportTasks::beijingNow()]);

        try {
            if (! empty($task['cancel'])) {
                $tasks->patch($task, ['status' => 'cancelled', 'finished_at' => AccountBillsExportTasks::beijingNow()]);
                $this->info('任务已取消。');

                return self::SUCCESS;
            }
            $columns = array_values((array) ($task['columns'] ?? []));
            if ($columns === []) {
                throw new \RuntimeException('导出任务没有可用字段。');
            }

            $csv = fopen($tasks->csvPath($task), 'w');
            if ($csv === false) {
                throw new \RuntimeException('无法创建导出文件。');
            }

            fputs($csv, chr(0xEF) . chr(0xBB) . chr(0xBF));
            fputcsv($csv, array_map(static fn (array $column): string => (string) ($column['label'] ?? ''), $columns));

            $written = 0;
            foreach ($this->rows($task, $remarkMap) as $row) {
                fputcsv($csv, array_map(
                    static fn (array $column): string => self::cellValue($row, $column),
                    $columns,
                ));
                $written++;
                if ($written % 2000 === 0) {
                    // 用户在弹窗里点了「取消」：停止导出并删掉半成品文件。
                    $fresh = $tasks->find((int) $task['user_id'], (string) $task['token']);
                    if (! empty($fresh['cancel'])) {
                        fclose($csv);
                        @unlink($tasks->csvPath($task));
                        $tasks->patch($task, ['status' => 'cancelled', 'rows' => $written, 'finished_at' => AccountBillsExportTasks::beijingNow(), 'size' => 0]);
                        $this->info('任务已取消（已写入 ' . $written . ' 行后停止）。');

                        return self::SUCCESS;
                    }
                    $task = $tasks->patch($task, ['status' => 'running', 'rows' => $written]);
                }
            }
            fclose($csv);

            $task = $tasks->patch($task, [
                'status' => 'done',
                'rows' => $written,
                'size' => (int) @filesize($tasks->csvPath($task)),
                'finished_at' => AccountBillsExportTasks::beijingNow(),
                'error' => null,
            ]);
            $this->info('导出完成：' . $written . ' 行');

            return self::SUCCESS;
        } catch (Throwable $exception) {
            $tasks->patch($task, [
                'status' => 'failed',
                'finished_at' => AccountBillsExportTasks::beijingNow(),
                'error' => mb_substr($exception->getMessage(), 0, 200),
            ]);
            $this->error('导出失败：' . $exception->getMessage());

            return self::FAILURE;
        }
    }

    private function findTask(AccountBillsExportTasks $tasks, string $token): ?array
    {
        $root = storage_path('app/account-bills-exports');
        foreach (glob($root . '/*/' . $token . '.json') ?: [] as $path) {
            $task = json_decode((string) file_get_contents($path), true);
            if (is_array($task) && ($task['token'] ?? null) === $token) {
                return $task;
            }
        }

        return null;
    }

    /** @return iterable<int,array<string,mixed>> */
    private function rows(array $task, AccountLedgerRemarkMap $remarkMap): iterable
    {
        $tab = (string) ($task['tab'] ?? '');
        $filters = (array) ($task['filters'] ?? []);
        // 后台导出固定按「记录编码」（数据库自增列）顺序取数：
        // 整月按「发生时间」排序要先对上千万行排序，首批数据要几分钟，阶段进度长时间是 0；按自增列取数快很多。
        $sort = 'record_code';
        $dir = strtolower((string) ($filters['dir'] ?? 'desc')) === 'asc' ? 'asc' : 'desc';
        unset($filters['sort'], $filters['dir'], $filters['export'], $filters['token'], $filters['total'], $filters['columns']);

        $rows = match ($tab) {
            'taobao-alipay' => app(StoreReceivingAlipayBillMirrorRepository::class)->exportRows($filters, $sort, $dir),
            'taobao-wechat' => app(TaobaoWechatSettlementBillRepository::class)->exportAccountBills($filters, $sort, $dir),
            'pinduoduo' => app(PinduoduoSettlementBillRepository::class)->exportAccountBills($filters, $sort, $dir),
            'dewu' => app(DewuSettlementBillRepository::class)->exportAccountBills($filters, $sort, $dir),
            'jd-transactions', 'jingxi' => JdBillPlatform::isJdBillTab($tab)
                ? app(JdDailyBillRepository::class)->forPlatform(JdBillPlatform::platformForBillType($tab))->exportRows($filters, $sort, $dir)
                : [],
            'jd-wallet' => app(StoreReceivingJdWalletBillRepository::class)->exportRows($filters, $sort, $dir),
            'douyin' => app(StoreReceivingDouyinBillMirrorRepository::class)->exportRows($filters, $sort, $dir),
            default => throw new \RuntimeException('该页签暂不支持后台导出：' . $tab),
        };

        return $remarkMap->decorateAll($rows, $tab);
    }

    /** @param array<string,mixed> $row */
    private static function cellValue(array $row, array $column): string
    {
        $field = (string) ($column['field'] ?? '');
        $value = str_starts_with($field, 'payload.')
            ? data_get($row['payload'] ?? [], substr($field, 8))
            : data_get($row, $field);

        $text = trim((string) ($value ?? ''));
        if ($text === '') {
            return '';
        }
        if (preg_match('/^\d{12,}$/', $text) === 1) {
            return '="' . $text . '"';
        }

        return preg_match('/^[=+\-@]/u', $text) === 1 ? "'" . $text : $text;
    }
}