/**
 * Deep Research V2.0 — Agent Terminal
 *
 * 暗色终端风格展示 AI 思考与执行过程：
 * - 每条日志展示完整思考内容
 * - 自动过滤无意义内容（任务 ID 等）
 * - 条件 auto-scroll
 */

import { useRef, useEffect, useCallback, useState } from 'react';
import { Spin, Typography, Alert } from 'antd';
import { LoadingOutlined } from '@ant-design/icons';
import type { DeepResearchTask, ExecutionLogEntry } from '../../types/deepResearch';

const { Text } = Typography;

interface AgentTerminalProps {
  task: DeepResearchTask | null;
  isRunning: boolean;
  isFailed: boolean;
}

const LOG_COLORS: Record<string, string> = {
  thinking: '#8b949e',
  searching: '#58a6ff',
  reading: '#d2a8ff',
  analyzing: '#7ee787',
  summary: '#ffa657',
  info: '#79c0ff',
};

const LOG_PREFIXES: Record<string, string> = {
  thinking: '🤔 思考',
  searching: '🔍 搜索',
  reading: '📖 阅读',
  analyzing: '🧪 分析',
  summary: '📊 总结',
  info: 'ℹ️ 信息',
};

const AgentTerminal: React.FC<AgentTerminalProps> = ({ task, isRunning, isFailed }) => {
  const containerRef = useRef<HTMLDivElement>(null);
  const [userScrolled, setUserScrolled] = useState(false);
  const prevLogCountRef = useRef(0);

  const logs = (task?.executionLogs || []).filter(
    (log: ExecutionLogEntry) => !log.text.includes('Unifuncs 任务 ID')
  );

  const handleScroll = useCallback(() => {
    const el = containerRef.current;
    if (!el) return;
    const distanceFromBottom = el.scrollHeight - el.scrollTop - el.clientHeight;
    setUserScrolled(distanceFromBottom > 50);
  }, []);

  useEffect(() => {
    if (!userScrolled && containerRef.current && logs.length > prevLogCountRef.current) {
      containerRef.current.scrollTop = containerRef.current.scrollHeight;
    }
    prevLogCountRef.current = logs.length;
  }, [logs.length, userScrolled]);

  return (
    <div>
      <div className="flex items-center gap-3 mb-4">
        {isRunning && <Spin indicator={<LoadingOutlined spin />} size="small" />}
        <Text strong className="text-lg">
          {isRunning ? 'Deep Research 执行中...' : isFailed ? '执行失败' : '执行完成'}
        </Text>
      </div>

      {isFailed && task?.errorMessage && (
        <Alert
          type="error"
          message="执行失败"
          description={task.errorMessage}
          className="mb-4"
          showIcon
        />
      )}

      <div
        ref={containerRef}
        onScroll={handleScroll}
        className="rounded-xl overflow-hidden"
        style={{
          background: '#0d1117',
          color: '#c9d1d9',
          fontFamily: "'JetBrains Mono', 'Fira Code', 'Consolas', monospace",
          fontSize: 13,
          lineHeight: 1.8,
          padding: '16px 20px',
          maxHeight: 500,
          minHeight: 200,
          overflowY: 'auto',
        }}
      >
        {/* Header */}
        <div className="flex items-center gap-2 mb-4 pb-3" style={{ borderBottom: '1px solid #21262d' }}>
          <span style={{ width: 12, height: 12, borderRadius: '50%', background: '#ff5f56', display: 'inline-block' }} />
          <span style={{ width: 12, height: 12, borderRadius: '50%', background: '#ffbd2e', display: 'inline-block' }} />
          <span style={{ width: 12, height: 12, borderRadius: '50%', background: '#27c93f', display: 'inline-block' }} />
          <span className="ml-3" style={{ color: '#8b949e' }}>Deep Research Agent</span>
        </div>

        {/* Log entries */}
        {logs.map((log: ExecutionLogEntry, i: number) => (
          <div key={i} className="mb-3 pb-2" style={{ borderBottom: '1px solid #161b22' }}>
            <div className="flex items-center gap-2 mb-1">
              <span style={{ color: LOG_COLORS[log.type] || '#c9d1d9', fontWeight: 600, fontSize: 12 }}>
                {LOG_PREFIXES[log.type] || log.title}
              </span>
              <span style={{ color: '#484f58', fontSize: 11 }}>
                {new Date(log.ts).toLocaleTimeString()}
              </span>
            </div>
            <div style={{ color: '#c9d1d9', paddingLeft: 4, whiteSpace: 'pre-wrap', wordBreak: 'break-word' }}>
              {log.text}
            </div>
          </div>
        ))}

        {/* Blinking cursor */}
        {isRunning && (
          <span className="inline-block mt-1" style={{
            width: 8,
            height: 16,
            background: '#58a6ff',
            animation: 'blink 1s step-end infinite',
          }} />
        )}

        {logs.length === 0 && (
          <div style={{ color: '#484f58' }}>等待任务启动...</div>
        )}
      </div>

      {userScrolled && isRunning && (
        <div className="text-center mt-2">
          <Text
            type="secondary"
            className="text-xs cursor-pointer hover:text-blue-400 transition-colors"
            onClick={() => {
              setUserScrolled(false);
              if (containerRef.current) {
                containerRef.current.scrollTop = containerRef.current.scrollHeight;
              }
            }}
          >
            ↓ 回到底部查看最新日志
          </Text>
        </div>
      )}

      <style>{`
        @keyframes blink {
          50% { opacity: 0; }
        }
      `}</style>
    </div>
  );
};

export default AgentTerminal;