import { useState, useCallback, useEffect } from 'react';
import { batchApi, type ApiLogPageResponse, type ApiLogStatus } from '../api/batchApi';
import { formatDateTime } from '../utils/formatters';
import Pagination from './Pagination';
import CopyButton from './CopyButton';

interface ApiLogSectionProps {
    stepExecutionId: number;
    summary: { totalCalls: number; successCount: number; errorCount: number };
}

export default function ApiLogSection({ stepExecutionId, summary }: ApiLogSectionProps) {
    const [open, setOpen] = useState(false);
    const [status, setStatus] = useState<ApiLogStatus>('ALL');
    const [page, setPage] = useState(0);
    const [logData, setLogData] = useState<ApiLogPageResponse | null>(null);
    const [loading, setLoading] = useState(false);

    const fetchLogs = useCallback(async (p: number, s: ApiLogStatus) => {
        setLoading(true);
        try {
            const data = await batchApi.getStepApiLogs(stepExecutionId, { page: p, size: 10, status: s });
            setLogData(data);
        } catch {
            setLogData(null);
        } finally {
            setLoading(false);
        }
    }, [stepExecutionId]);

    useEffect(() => {
        if (open) {
            fetchLogs(page, status);
        }
    }, [open, page, status, fetchLogs]);

    const handleStatusChange = (s: ApiLogStatus) => {
        setStatus(s);
        setPage(0);
    };

    const filters: { key: ApiLogStatus; label: string; count: number }[] = [
        { key: 'ALL', label: '전체', count: summary.totalCalls },
        { key: 'SUCCESS', label: '성공', count: summary.successCount },
        { key: 'ERROR', label: '에러', count: summary.errorCount },
    ];

    return (
        <div className="mt-2">
            <button
                onClick={() => setOpen((v) => !v)}
                className="inline-flex items-center gap-1 text-xs font-medium text-blue-600 hover:text-blue-800 transition-colors"
            >
                <svg
                    className={`w-3 h-3 transition-transform ${open ? 'rotate-90' : ''}`}
                    fill="none" viewBox="0 0 24 24" stroke="currentColor"
                >
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
                </svg>
                개별 호출 로그 ({summary.totalCalls.toLocaleString()}건)
            </button>

            {open && (
                <div className="mt-2">
                    {/* 상태 필터 탭 */}
                    <div className="flex gap-1 mb-2">
                        {filters.map(({ key, label, count }) => (
                            <button
                                key={key}
                                onClick={() => handleStatusChange(key)}
                                className={`px-2.5 py-1 text-xs rounded-full font-medium transition-colors ${
                                    status === key
                                        ? key === 'ERROR'
                                            ? 'bg-red-100 text-red-700'
                                            : key === 'SUCCESS'
                                                ? 'bg-emerald-100 text-emerald-700'
                                                : 'bg-blue-100 text-blue-700'
                                        : 'bg-gray-100 text-gray-500 hover:bg-gray-200'
                                }`}
                            >
                                {label} ({count.toLocaleString()})
                            </button>
                        ))}
                    </div>

                    {loading ? (
                        <div className="flex items-center justify-center py-6">
                            <div className="h-5 w-5 animate-spin rounded-full border-2 border-blue-500 border-t-transparent" />
                            <span className="ml-2 text-xs text-blue-500">로딩중...</span>
                        </div>
                    ) : logData && logData.content.length > 0 ? (
                        <>
                            <div className="overflow-x-auto">
                                <table className="w-full text-xs text-left">
                                    <thead className="bg-blue-100 text-blue-700 sticky top-0">
                                        <tr>
                                            <th className="px-2 py-1.5 font-medium">#</th>
                                            <th className="px-2 py-1.5 font-medium">URI</th>
                                            <th className="px-2 py-1.5 font-medium">Method</th>
                                            <th className="px-2 py-1.5 font-medium">상태</th>
                                            <th className="px-2 py-1.5 font-medium text-right">응답(ms)</th>
                                            <th className="px-2 py-1.5 font-medium text-right">건수</th>
                                            <th className="px-2 py-1.5 font-medium">시간</th>
                                            <th className="px-2 py-1.5 font-medium">에러</th>
                                        </tr>
                                    </thead>
                                    <tbody className="divide-y divide-blue-100">
                                        {logData.content.map((log, idx) => {
                                            const isError = (log.statusCode != null && log.statusCode >= 400) || log.errorMessage;
                                            return (
                                                <tr
                                                    key={log.logId}
                                                    className={isError ? 'bg-red-50' : 'bg-white hover:bg-blue-50'}
                                                >
                                                    <td className="px-2 py-1.5 text-blue-500">{page * 10 + idx + 1}</td>
                                                    <td className="px-2 py-1.5 max-w-[200px]">
                                                        <div className="flex items-center gap-0.5">
                                                            <span className="font-mono text-blue-900 truncate" title={log.requestUri}>
                                                                {log.requestUri}
                                                            </span>
                                                            <CopyButton text={log.requestUri} />
                                                        </div>
                                                    </td>
                                                    <td className="px-2 py-1.5 font-semibold text-blue-900">{log.httpMethod}</td>
                                                    <td className="px-2 py-1.5">
                                                        <span className={`font-semibold ${
                                                            log.statusCode == null ? 'text-gray-400'
                                                                : log.statusCode < 300 ? 'text-emerald-600'
                                                                : log.statusCode < 400 ? 'text-amber-600'
                                                                : 'text-red-600'
                                                        }`}>
                                                            {log.statusCode ?? '-'}
                                                        </span>
                                                    </td>
                                                    <td className="px-2 py-1.5 text-right text-blue-900">
                                                        {log.responseTimeMs?.toLocaleString() ?? '-'}
                                                    </td>
                                                    <td className="px-2 py-1.5 text-right text-blue-900">
                                                        {log.responseCount?.toLocaleString() ?? '-'}
                                                    </td>
                                                    <td className="px-2 py-1.5 text-blue-600 whitespace-nowrap">
                                                        {formatDateTime(log.createdAt)}
                                                    </td>
                                                    <td className="px-2 py-1.5 text-red-500 max-w-[150px] truncate" title={log.errorMessage || ''}>
                                                        {log.errorMessage || '-'}
                                                    </td>
                                                </tr>
                                            );
                                        })}
                                    </tbody>
                                </table>
                            </div>

                            {/* 페이지네이션 */}
                            <Pagination
                                page={page}
                                totalPages={logData.totalPages}
                                totalElements={logData.totalElements}
                                pageSize={10}
                                onPageChange={setPage}
                            />
                        </>
                    ) : (
                        <p className="text-xs text-wing-muted py-3 text-center">조회된 로그가 없습니다.</p>
                    )}
                </div>
            )}
        </div>
    );
}