// EnhancedLogResults.tsx — Grafana 风格日志结果展示 // Logan.Li
import { useState, useMemo } from 'react';
import { ChevronDown, ChevronRight, BarChart3, Plus, Search, Copy, Check } from 'lucide-react';
import { useToast } from '@/hooks/use-toast';
import { copyToClipboard } from '@/utils/clipboard';
import { buildLogCopyText, detectLogFields, formatLogPreview, formatLogTimestamp } from './log-format';
import type { LogEntry, ViewMode } from './types-v3';
type ViewDensity = 'compact' | 'comfortable' | 'loose';

interface Props {
  entries: LogEntry[];
  loading?: boolean;
  viewMode: ViewMode;
  wrapLines: boolean;
  truncate: boolean;
  density?: ViewDensity;
  fieldSearch?: string;
  // Grafana 风格新增 // Logan.Li
  showTime?: boolean;
  onShowTimeChange?: (v: boolean) => void;
  uniqueLabels?: boolean;
  onUniqueLabelsChange?: (v: boolean) => void;
  prettifyJSON?: boolean;
  onPrettifyJSONChange?: (v: boolean) => void;
  dedupMode?: DedupMode;
  onDedupModeChange?: (m: DedupMode) => void;
  sortOrder?: 'newest' | 'oldest';
  onSortOrderChange?: (o: 'newest' | 'oldest') => void;
  // Common labels
  commonLabels?: Record<string, string>;
  // 标签操作回调
  onLabelFilter?: (key: string, value: string, op: 'include' | 'exclude') => void;
}

type DedupMode = 'none' | 'exact' | 'numbers' | 'signature';

function levelBadge(level?: string): string {
  const l = (level || '').toLowerCase();
  if (l === 'error' || l === 'fatal' || l === 'err') return 'bg-red-500/15 dg-text-red border-red-500/30';
  if (l === 'warn' || l === 'warning') return 'bg-amber-500/15 dg-text-yellow border-amber-500/30';
  if (l === 'info') return 'bg-emerald-500/15 dg-text-green border-emerald-500/30';
  if (l === 'debug') return 'bg-[var(--dg-bg-active)]/15 dg-text-secondary border-[var(--dg-border)]';
  return 'bg-[var(--dg-bg-active)]/15 dg-text-secondary border-[var(--dg-border)]';
}

function levelColorText(level?: string): string {
  const l = (level || '').toLowerCase();
  if (l === 'error' || l === 'fatal' || l === 'err') return '#f87171';
  if (l === 'warn' || l === 'warning') return '#fbbf24';
  if (l === 'info') return '#34d399';
  if (l === 'debug') return '#94a3b8';
  return '#94a3b8';
}

const DENSITY_PADDING: Record<ViewDensity, string> = {
  compact: 'py-0.5',
  comfortable: 'py-1.5',
  loose: 'py-2.5',
};

// ===== Dedup 处理 ===== //
function dedupEntries(entries: LogEntry[], mode: DedupMode): LogEntry[] {
  if (mode === 'none') return entries;
  const seen = new Set<string>();
  return entries.filter(e => {
    let key: string;
    if (mode === 'exact') key = e.message;
    else if (mode === 'numbers') key = e.message.replace(/\d+/g, '');
    else key = `${e.level || ''}:${e.labels?.service || ''}:${e.message.slice(0, 80)}`;
    if (seen.has(key)) return false;
    seen.add(key);
    return true;
  });
}

// ===== 提取 Common Labels ===== //
export function extractCommonLabels(entries: LogEntry[]): Record<string, string> | null {
  if (entries.length === 0) return null;
  const first = entries[0].labels || {};
  const common: Record<string, string> = {};
  for (const [k, v] of Object.entries(first)) {
    if (entries.every(e => e.labels?.[k] === v)) common[k] = v;
  }
  return Object.keys(common).length > 0 ? common : null;
}

// 日志行 CSS：截断关闭时用横向滚动而非省略号，避免看不到后半段 // Logan.Li
function messageLineClass(wrap: boolean, trunc: boolean): string {
  if (wrap) return 'whitespace-pre-wrap break-all';
  if (trunc) return 'truncate';
  return 'whitespace-nowrap overflow-x-auto';
}

// ===== 原始日志视图（Grafana 风格）=====
function RawLogView({
  entry, wrap, trunc, showTime, onLabelFilter,
}: {
  entry: LogEntry; wrap: boolean; trunc: boolean;
  showTime: boolean; onLabelFilter?: (k: string, v: string, op: 'include' | 'exclude') => void;
}) {
  const { toast } = useToast();
  const [expanded, setExpanded] = useState(false);
  const [copied, setCopied] = useState(false);
  const labels = entry.labels || {};
  const fullText = entry.raw || entry.message || '';
  const detected = useMemo(() => detectLogFields(fullText), [fullText]);
  const displayTs = formatLogTimestamp(entry.timestamp);
  const preview = expanded ? fullText : formatLogPreview(fullText, trunc);

  const copyRaw = async () => {
    const text = buildLogCopyText(entry);
    const ok = await copyToClipboard(text);
    if (ok) {
      setCopied(true);
      toast({ title: '已复制完整日志' });
      setTimeout(() => setCopied(false), 1500);
    } else {
      toast({ title: '复制失败', description: '请展开后手动选中复制', variant: 'destructive' });
    }
  };

  return (
    <div className="group" style={{ borderBottom: '1px solid var(--dg-border)' }}>
      {/* 日志行 */}
      <div
        className="flex items-start gap-2 cursor-pointer hover:opacity-90 transition-colors"
        style={{ background: 'var(--dg-bg-secondary)', padding: '4px 12px' }}
        onClick={() => setExpanded(!expanded)}
      >
        {/* 展开图标 */}
        <span className="flex-shrink-0 mt-0.5" style={{ color: 'var(--dg-text-muted)' }}>
          {expanded ? <ChevronDown className="h-3 w-3" /> : <ChevronRight className="h-3 w-3" />}
        </span>

        {/* 时间戳 */}
        {showTime && (
          <span className="text-[11px] font-mono flex-shrink-0 w-[180px] mt-0.5" style={{ color: 'var(--dg-text-muted)' }} title={entry.timestamp}>
            {displayTs}
          </span>
        )}

        {/* 日志级别 */}
        {entry.level && (
          <span className="text-[10px] font-medium flex-shrink-0 mt-0.5" style={{ color: levelColorText(entry.level), minWidth: '40px' }}>
            {entry.level.toUpperCase()}
          </span>
        )}

        {/* 日志内容（折叠预览） */}
        <span
          className={`text-xs font-mono flex-1 min-w-0 ${messageLineClass(wrap, trunc && !expanded)}`}
          style={{ color: 'var(--dg-text-secondary)' }}
          title={!expanded && fullText.length > 120 ? fullText : undefined}
        >
          {preview}
        </span>

        {/* 复制按钮（hover 显示，复制完整原文） */}
        <button
          onClick={e => { e.stopPropagation(); void copyRaw(); }}
          className="flex-shrink-0 opacity-0 group-hover:opacity-100 transition-opacity mt-0.5"
          style={{ color: 'var(--dg-text-muted)' }}
          title="复制完整日志"
        >
          {copied ? <Check className="h-3 w-3 dg-text-green" /> : <Copy className="h-3 w-3" />}
        </button>
      </div>

      {/* 展开详情：完整日志 + labels + fields */}
      {expanded && (
        <div className="animate-fade-in" style={{ background: 'var(--dg-bg-secondary)', padding: '8px 12px 12px 36px' }}>
          {/* 完整日志正文 */}
          <div className="mb-3">
            <div className="flex items-center justify-between mb-1.5">
              <p className="text-[10px] font-medium" style={{ color: 'var(--dg-text-muted)' }}>完整日志</p>
              <button
                type="button"
                onClick={e => { e.stopPropagation(); void copyRaw(); }}
                className="text-[10px] px-2 py-0.5 rounded border"
                style={{ borderColor: 'var(--dg-border)', color: 'var(--dg-text-secondary)' }}
              >
                {copied ? '已复制' : '复制全文'}
              </button>
            </div>
            <pre
              className="text-[11px] font-mono whitespace-pre-wrap break-all p-2 rounded max-h-[320px] overflow-y-auto"
              style={{ background: 'var(--dg-bg-tertiary)', color: 'var(--dg-text-primary)', border: '1px solid var(--dg-border)' }}
            >
              {fullText}
            </pre>
          </div>

          {/* Log labels */}
          {Object.keys(labels).length > 0 && (
            <div className="mb-3">
              <p className="text-[10px] font-medium mb-1.5" style={{ color: 'var(--dg-text-muted)' }}>Log labels</p>
              <div className="space-y-1">
                {Object.entries(labels).map(([k, v]) => (
                  <div key={k} className="flex items-center gap-2 group/label">
                    <BarChart3 className="h-3 w-3 flex-shrink-0 opacity-0 group-hover/label:opacity-100 transition-opacity" style={{ color: 'var(--dg-text-muted)' }} />
                    <button
                      className="opacity-0 group-hover/label:opacity-100 transition-opacity flex-shrink-0"
                      style={{ color: '#22c55e' }}
                      onClick={e => { e.stopPropagation(); onLabelFilter?.(k, v, 'include'); }}
                      title={`Filter for ${k}=${v}`}
                    >
                      <Plus className="h-3 w-3" />
                    </button>
                    <span className="text-[11px] font-mono w-[160px] flex-shrink-0" style={{ color: 'var(--dg-text-primary)' }}>{k}</span>
                    <span className="text-[11px] font-mono flex-1 break-all" style={{ color: 'var(--dg-text-secondary)' }}>{v}</span>
                  </div>
                ))}
              </div>
            </div>
          )}

          {/* Detected fields */}
          {detected.length > 0 && (
            <div>
              <p className="text-[10px] font-medium mb-1.5" style={{ color: 'var(--dg-text-muted)' }}>Detected fields</p>
              <div className="space-y-1">
                {detected.map(({ name, value }) => (
                  <div key={name} className="flex items-center gap-2 group/field">
                    <BarChart3 className="h-3 w-3 flex-shrink-0 opacity-0 group-hover/field:opacity-100 transition-opacity" style={{ color: 'var(--dg-text-muted)' }} />
                    <button
                      className="opacity-0 group-hover/field:opacity-100 transition-opacity flex-shrink-0"
                      style={{ color: '#22c55e' }}
                      onClick={e => { e.stopPropagation(); onLabelFilter?.(name, value, 'include'); }}
                    >
                      <Plus className="h-3 w-3" />
                    </button>
                    <button
                      className="opacity-0 group-hover/field:opacity-100 transition-opacity flex-shrink-0"
                      style={{ color: '#ef4444' }}
                      onClick={e => { e.stopPropagation(); onLabelFilter?.(name, value, 'exclude'); }}
                    >
                      <Search className="h-3 w-3" />
                    </button>
                    <span className="text-[11px] font-mono w-[160px] truncate flex-shrink-0" style={{ color: 'var(--dg-text-primary)' }}>{name}</span>
                    <span className="text-[11px] font-mono flex-1 break-all" style={{ color: 'var(--dg-text-secondary)' }}>{value}</span>
                  </div>
                ))}
              </div>
            </div>
          )}
        </div>
      )}
    </div>
  );
}

// ===== 字段视图 ===== //
function FieldView({ entries, wrap, trunc, search }: { entries: LogEntry[]; wrap: boolean; trunc: boolean; search?: string }) {
  const columns = useMemo(() => {
    const colSet = new Set<string>();
    entries.forEach(e => { if (e.labels) Object.keys(e.labels).forEach(k => colSet.add(k)); });
    colSet.add('timestamp'); colSet.add('message');
    const arr = Array.from(colSet);
    return search ? arr.filter(c => c.toLowerCase().includes(search.toLowerCase())) : arr;
  }, [entries, search]);

  return (
    <div className="overflow-x-auto">
      <table className="w-full text-xs" style={{ borderCollapse: 'collapse' }}>
        <thead>
          <tr style={{ background: 'var(--dg-bg-tertiary)', borderBottom: '1px solid var(--dg-border)' }}>
            {columns.map(col => (
              <th key={col} className="text-left px-2 py-1.5 font-medium whitespace-nowrap" style={{ color: 'var(--dg-text-muted)', fontSize: '10px', textTransform: 'uppercase' }}>{col}</th>
            ))}
          </tr>
        </thead>
        <tbody>
          {entries.map((e, i) => (
            <tr key={i} className="hover:opacity-80 transition-colors" style={{ borderBottom: '1px solid var(--dg-border)' }}>
              {columns.map(col => {
                let val: string;
                if (col === 'timestamp') val = formatLogTimestamp(e.timestamp);
                else if (col === 'message') val = e.raw || e.message;
                else val = e.labels?.[col] || '—';
                return (
                  <td key={col} className={`px-2 py-1.5 max-w-[400px] ${wrap ? 'break-all whitespace-pre-wrap' : trunc ? 'truncate' : 'break-all'}`} style={{ color: 'var(--dg-text-secondary)' }} title={val}>
                    {trunc ? formatLogPreview(val, true, 200) : val}
                  </td>
                );
              })}
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  );
}

// ===== 表格视图 ===== //
function TableView({ entries, wrap, trunc }: { entries: LogEntry[]; wrap: boolean; trunc: boolean }) {
  return (
    <div className="overflow-x-auto">
      <table className="w-full text-xs" style={{ borderCollapse: 'collapse' }}>
        <thead>
          <tr style={{ background: 'var(--dg-bg-tertiary)', borderBottom: '1px solid var(--dg-border)' }}>
            <th className="text-left px-3 py-2 font-medium w-[160px]" style={{ color: 'var(--dg-text-muted)', fontSize: '10px' }}>Time</th>
            <th className="text-left px-3 py-2 font-medium w-[72px]" style={{ color: 'var(--dg-text-muted)', fontSize: '10px' }}>Level</th>
            <th className="text-left px-3 py-2 font-medium" style={{ color: 'var(--dg-text-muted)', fontSize: '10px' }}>Message</th>
          </tr>
        </thead>
        <tbody>
          {entries.map((e, i) => (
            <tr key={i} className="hover:opacity-80 transition-colors" style={{ borderBottom: '1px solid var(--dg-border)' }}>
              <td className="px-3 py-2 font-mono text-[11px] whitespace-nowrap" style={{ color: 'var(--dg-text-muted)' }}>{formatLogTimestamp(e.timestamp)}</td>
              <td className="px-3 py-2">
                {e.level ? <span className={`text-[10px] px-1.5 py-0.5 rounded border ${levelBadge(e.level)}`}>{e.level}</span> : '—'}
              </td>
              <td className={`px-3 py-2 ${messageLineClass(wrap, trunc)} max-w-[800px]`} style={{ color: 'var(--dg-text-secondary)' }} title={e.raw || e.message}>
                {trunc ? formatLogPreview(e.raw || e.message, true, 300) : (e.raw || e.message)}
              </td>
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  );
}

// ===== 主组件 ===== //
export function EnhancedLogResults({
  entries, loading, viewMode, wrapLines, truncate, density = 'comfortable',
  showTime = true, onShowTimeChange,
  uniqueLabels = false, onUniqueLabelsChange,
  prettifyJSON = false, onPrettifyJSONChange,
  dedupMode = 'none', onDedupModeChange,
  sortOrder = 'newest', onSortOrderChange,
  commonLabels,
  onLabelFilter,
}: Props) {
  // 去重处理
  const dedupedEntries = useMemo(() => dedupEntries(entries, dedupMode), [entries, dedupMode]);

  // 排序处理
  const sortedEntries = useMemo(() => {
    if (sortOrder === 'oldest') return [...dedupedEntries].sort((a, b) => a.timestamp.localeCompare(b.timestamp));
    return dedupedEntries;
  }, [dedupedEntries, sortOrder]);

  if (loading) {
    return (
      <div className="border rounded-lg overflow-hidden animate-pulse" style={{ borderColor: 'var(--dg-border)' }}>
        {[1, 2, 3, 4, 5].map(i => (
          <div key={i} className={`${DENSITY_PADDING[density]} px-3`} style={{ borderBottom: '1px solid var(--dg-border)' }}>
            <div className="h-4 rounded" style={{ background: 'var(--dg-bg-tertiary)', width: `${60 + Math.random() * 40}%` }} />
          </div>
        ))}
      </div>
    );
  }

  if (entries.length === 0) {
    return (
      <div className="border rounded-lg overflow-hidden flex items-center justify-center" style={{ borderColor: 'var(--dg-border)', minHeight: '200px' }}>
        <span className="text-sm" style={{ color: 'var(--dg-text-muted)' }}>暂无日志</span>
      </div>
    );
  }

  return (
    <div>
      {/* Common labels */}
      {commonLabels && Object.keys(commonLabels).length > 0 && (
        <div className="flex flex-wrap items-center gap-1.5 mb-2 px-1">
          <span className="text-[11px]" style={{ color: 'var(--dg-text-muted)' }}>Common labels:</span>
          {Object.entries(commonLabels).map(([k, v]) => (
            <span key={k} className="text-[10px] px-1.5 py-0.5 rounded" style={{ background: 'var(--dg-bg-tertiary)', color: 'var(--dg-text-secondary)', border: '1px solid var(--dg-border)' }}>
              {k}={v}
            </span>
          ))}
        </div>
      )}

      {/* 工具栏 */}
      <div className="flex flex-wrap items-center gap-3 mb-2 px-1">
        {/* Time 开关 */}
        <label className="flex items-center gap-1.5 text-[11px] cursor-pointer" style={{ color: 'var(--dg-text-muted)' }}>
          <input type="checkbox" checked={showTime} onChange={e => onShowTimeChange?.(e.target.checked)} className="h-3 w-3 rounded" />
          Time
        </label>

        {/* Unique labels */}
        <label className="flex items-center gap-1.5 text-[11px] cursor-pointer" style={{ color: 'var(--dg-text-muted)' }}>
          <input type="checkbox" checked={uniqueLabels} onChange={e => onUniqueLabelsChange?.(e.target.checked)} className="h-3 w-3 rounded" />
          Unique labels
        </label>

        {/* Wrap lines */}
        <label className="flex items-center gap-1.5 text-[11px] cursor-pointer" style={{ color: 'var(--dg-text-muted)' }}>
          <input type="checkbox" checked={wrapLines} onChange={() => {}} className="h-3 w-3 rounded" disabled />
          Wrap lines
        </label>

        {/* Prettify JSON */}
        <label className="flex items-center gap-1.5 text-[11px] cursor-pointer" style={{ color: 'var(--dg-text-muted)' }}>
          <input type="checkbox" checked={prettifyJSON} onChange={e => onPrettifyJSONChange?.(e.target.checked)} className="h-3 w-3 rounded" />
          Prettify JSON
        </label>

        {/* Dedup */}
        <div className="flex items-center gap-1 text-[11px]">
          <span style={{ color: 'var(--dg-text-muted)' }}>Dedup</span>
          {(['none', 'exact', 'numbers', 'signature'] as DedupMode[]).map(m => (
            <button
              key={m}
              onClick={() => onDedupModeChange?.(m)}
              className="px-1.5 py-0.5 rounded text-[10px] transition-colors"
              style={{
                background: dedupMode === m ? 'var(--dg-bg-tertiary)' : 'transparent',
                color: dedupMode === m ? 'var(--dg-text-primary)' : 'var(--dg-text-muted)',
                border: dedupMode === m ? '1px solid var(--dg-border)' : '1px solid transparent',
              }}
            >
              {m.charAt(0).toUpperCase() + m.slice(1)}
            </button>
          ))}
        </div>

        {/* Sort order */}
        <div className="flex items-center gap-1 ml-auto">
          <span className="text-[11px]" style={{ color: 'var(--dg-text-muted)' }}>Display results</span>
          {(['newest', 'oldest'] as const).map(o => (
            <button
              key={o}
              onClick={() => onSortOrderChange?.(o)}
              className="px-2 py-0.5 rounded text-[10px] transition-colors"
              style={{
                background: sortOrder === o ? 'var(--dg-bg-tertiary)' : 'transparent',
                color: sortOrder === o ? 'var(--dg-text-primary)' : 'var(--dg-text-muted)',
                border: sortOrder === o ? '1px solid var(--dg-border)' : '1px solid transparent',
              }}
            >
              {o === 'newest' ? 'Newest first' : 'Oldest first'}
            </button>
          ))}
        </div>
      </div>

      {/* 结果内容 */}
      <div className="border rounded-lg overflow-hidden" style={{ borderColor: 'var(--dg-border)' }}>
        {viewMode === 'raw' && sortedEntries.map((e, i) => (
          <RawLogView key={i} entry={e} wrap={wrapLines} trunc={truncate} showTime={showTime} onLabelFilter={onLabelFilter} />
        ))}
        {viewMode === 'field' && <FieldView entries={sortedEntries} wrap={wrapLines} trunc={truncate} />}
        {viewMode === 'table' && <TableView entries={sortedEntries} wrap={wrapLines} trunc={truncate} />}
      </div>
    </div>
  );
}