import React, { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react';
import { useNavigate } from 'react-router-dom';
import { Model } from '../types/models';
import { FileText } from '../icons/commonIcons';
import { getCategoryIcon } from '../icons/modelIcons';
import { getPricingMappingLookup, modelApi } from '../services/modelApi';

export interface ModelCardProps {
  model: Model;
  // 可选的额外数据（用于百炼模型）
  bailianData?: {
    image?: string;
    version?: string;
    date?: string;
    tag?: string;
  };
  // 版本信息显示方式：'standard' 或 'bailian'
  versionDisplayMode?: 'standard' | 'bailian';
  // 可选的名称解析函数（用于百炼模型）
  nameParser?: (model: Model, bailianModels?: any[]) => {
    mainName: string;
    versionInfo: string | null;
  };
  bailianModels?: any[];
  // 悬停延迟（毫秒），如果设置则鼠标悬停超过该时间才显示价格
  hoverDelayMs?: number;
}

type PricingLine = {
  text: string;
  original?: string;
  discountLabel?: string;  // 如 "8折"
};

type PricingDisplay = {
  modelCode: string;
  lines: PricingLine[];
};

const pricingCache = new Map<string, PricingDisplay | null>();

const pricingKeyLabels: Record<string, string> = {
  input: '输入',
  output: '输出',
  input_thinking: '输入（思考）',
  output_thinking: '输出（思考）',
  input_cache_hit: '输入（缓存命中）',
  input_cache_hit_thinking: '输入（缓存命中·思考）',
  input_batch: '输入（批量）',
  input_batch_thinking: '输入（批量·思考）',
  output_batch: '输出（批量）',
  output_thinking_batch: '输出（批量·思考）',
  cache_write: '缓存写入',
  cache_read: '缓存读取',
  explicit_cache_create: '显式缓存写入',
  explicit_cache_hit: '显式缓存命中',
  explicit_cache_create_thinking: '显式缓存写入（思考）',
  explicit_cache_hit_thinking: '显式缓存命中（思考）',
  image_input: '图片输入',
  text_input: '文本输入'
};

const categoryKeyLabels: Record<string, string> = {
  image_generation: '图片生成',
  video_generation: '视频生成',
  audio_generation: '音频生成',
  text_generation: '文本生成',
  embedding: '向量生成'
};

const normalizeMappingKey = (value: string): string => {
  return value
    .replace(/[－–—‑]/g, '-')
    .replace(/[\u200B-\u200D\uFEFF]/g, '')
    .replace(/\s*-\s*/g, '-')
    .replace(/\s+/g, ' ')
    .trim();
};

const formatPricingLines = (pricing: any): PricingLine[] => {
  if (!pricing) return [];

  const formatPrice = (price: number, unit?: string): number => {
    const unitStr = (unit || '').toLowerCase();
    const isTokenUnit = unitStr.includes('token') || unitStr.includes('百万') || unitStr.includes('million');
    if (isTokenUnit && price < 0.01) return price * 1000;
    return price;
  };

  const makeLine = (label: string, price: number, originalPrice: number | undefined, unit: string, discountRate?: number): PricingLine => {
    const discounted = formatPrice(price, unit);
    const hasDiscount = originalPrice !== undefined && originalPrice > 0 && Math.abs(originalPrice - price) > 0.000001;
    const original = hasDiscount ? `${formatPrice(originalPrice!, unit)}` : undefined;
    // 折扣标签：discount_rate 是 0~1，如 0.1 = 1折
    const discountLabel = hasDiscount && discountRate && discountRate < 1
      ? `${Math.round(discountRate * 10)}折`
      : hasDiscount
        ? (() => {
            const rate = originalPrice && originalPrice > 0 ? price / originalPrice : 1;
            const tenths = Math.round(rate * 10);
            return tenths < 10 ? `${tenths}折` : undefined;
          })()
        : undefined;
    return {
      text: `${label}：${discounted}${unit}`,
      original: original ? `${label}：${original}${unit}` : undefined,
      discountLabel,
    };
  };

  const normalizeUnit = (u: string) => u.includes('token') && !u.includes('tokens') ? u.replace('token', 'tokens') : u;

  if (Array.isArray(pricing)) {
    // tier 数组：取第一个有效 tier 的输入/输出价格展示，忽略 input_range 技术细节
    const lines: PricingLine[] = [];
    const firstTier = pricing.find(i => i !== null && i !== undefined) as any;
    if (!firstTier || typeof firstTier !== 'object') return [];

    const unit = firstTier.unit ? ` ${normalizeUnit(firstTier.unit)}` : '';

    // 如果是 tier 格式（有 input_range），直接取 input/output
    if (firstTier.input_range || firstTier.range || firstTier.inputRange) {
      if (firstTier.input !== undefined && firstTier.input !== null) {
        lines.push(makeLine('输入', firstTier.input, firstTier.input_original, unit));
      }
      if (firstTier.output !== undefined && firstTier.output !== null && firstTier.output > 0) {
        lines.push(makeLine('输出', firstTier.output, firstTier.output_original, unit));
      }
      return lines;
    }

    const priceVal = firstTier.price ?? firstTier.amount ?? firstTier.value;
    if (firstTier.item && priceVal !== undefined) {
      lines.push(makeLine(firstTier.item, priceVal, firstTier.price_original, unit));
      return lines;
    }

    const handled = new Set([...Object.keys(pricingKeyLabels), 'unit', 'input_range', 'range', 'inputRange',
      'input_original', 'output_original', 'discount_rate', 'price_original']);
    Object.keys(pricingKeyLabels).forEach(key => {
      if (item[key] !== undefined && item[key] !== null) {
        const origKey = `${key}_original`;
        lines.push(makeLine(pricingKeyLabels[key], item[key], item[origKey], item.unit ? ` ${normalizeUnit(item.unit)}` : unit, item.discount_rate));
        handled.add(key);
      }
    });
    return lines;
  }

  if (typeof pricing === 'object') {
    const unit = pricing.unit ? ` ${normalizeUnit(pricing.unit)}` : '';
    const lines: PricingLine[] = [];

    const simplePriceVal = pricing.price ?? pricing.amount ?? pricing.value;
    if (pricing.item && simplePriceVal !== undefined) {
      lines.push(makeLine(pricing.item, simplePriceVal, pricing.price_original, unit));
      return lines;
    }

    const handled = new Set([...Object.keys(pricingKeyLabels), 'unit', 'input_original', 'output_original', 'discount_rate']);
    Object.keys(pricingKeyLabels).forEach(key => {
      if (pricing[key] !== undefined && pricing[key] !== null) {
        const origKey = `${key}_original`;
        lines.push(makeLine(pricingKeyLabels[key], pricing[key], pricing[origKey], unit, pricing.discount_rate));
        handled.add(key);
      }
    });

    Object.entries(pricing).forEach(([key, value]) => {
      if (handled.has(key)) return;
      if (Array.isArray(value)) {
        value.forEach(item => {
          if (!item) return;
          const label = item.item || categoryKeyLabels[key] || key;
          const price = item.price ?? item.amount ?? item.value;
          const unitText = item.unit ? ` ${normalizeUnit(item.unit)}` : unit;
          if (price === undefined || price === null) return;
          lines.push(makeLine(label, price, item.price_original, unitText));
        });
      }
    });

    return lines;
  }

  return [];
};

const ModelCard: React.FC<ModelCardProps> = ({
  model,
  bailianData,
  versionDisplayMode = 'standard',
  nameParser,
  bailianModels,
  hoverDelayMs
}) => {
  const [pricingDisplay, setPricingDisplay] = useState<PricingDisplay | null | undefined>(undefined);
  const [pricingLoading, setPricingLoading] = useState(false);
  const [showOverlay, setShowOverlay] = useState(false);
  const hoverTimerRef = useRef<number | null>(null);
  const headerRef = useRef<HTMLDivElement | null>(null);
  const iconRef = useRef<HTMLDivElement | null>(null);
  const rootRef = useRef<HTMLDivElement | null>(null);
  const [overlayTopPx, setOverlayTopPx] = useState<number>(0);
  
  const navigate = useNavigate();

  // 解析模型名称和版本信息
  let mainName = model.name;
  let versionInfo: string | null = null;

  if (nameParser) {
    const parsed = nameParser(model, bailianModels);
    mainName = parsed.mainName;
    versionInfo = parsed.versionInfo;
  } else if (versionDisplayMode === 'standard') {
    // 标准模式：解析模型名称，支持换行显示
    // 格式：主名称\n最新版本\n版本号
    const nameParts = model.name.split('\n');
    mainName = nameParts[0] || model.name;
    const versionLabel = nameParts[1] || null;
    const versionCode = nameParts[2] || null;
    versionInfo = versionLabel && versionCode ? `${versionLabel} ${versionCode}` : (versionLabel || versionCode || null);
  } else if (versionDisplayMode === 'bailian' && bailianData) {
    // 百炼模式：从 bailianData 获取版本信息
    const nameParts = bailianModels?.find((b: any) => b.标题 === model.id)?.名称.split('\n') || [];
    const version = nameParts[2] || bailianData.version || '';
    versionInfo = version || null;
  }

  // 处理标签显示逻辑（根据 tag1 / tag2 推断“New”）
  const shouldShowNew = model.tag1 === 'New' || model.tag2 === 'New';
  const versionTag = model.tag2;
  
  // 百炼模式的标签处理
  const bailianTag = bailianData?.tag && bailianData.tag !== '最新版本' && bailianData.tag !== 'New' ? bailianData.tag : null;

  const pricingLookupKey = useMemo(() => {
    // 优先使用model.title作为查询键，因为后端存储的是title
    if (model.title) {
      const normalizedTitle = normalizeMappingKey(model.title);
      console.log('Using model.title as lookup key:', normalizedTitle);
      return normalizedTitle;
    }

    const normalizedName = normalizeMappingKey(mainName || '');
    if (normalizedName) {
      console.log('Using mainName as lookup key:', normalizedName);
      return normalizedName;
    }

    const name = model.name || '';
    const nameParts = name
      .split('\n')
      .map((part) => part.trim())
      .filter(Boolean);
    const latestIndex = nameParts.findIndex((part) => part === '最新版本');
    if (latestIndex !== -1 && nameParts[latestIndex + 1]) {
      const versionKey = normalizeMappingKey(nameParts[latestIndex + 1]);
      console.log('Using version from name as lookup key:', versionKey);
      return versionKey;
    }

    const inlineLatest = nameParts.find((part) => part.startsWith('最新版本'));
    if (inlineLatest) {
      const match = inlineLatest.match(/最新版本\s*([A-Za-z0-9._-]+)/);
      if (match?.[1]) {
        const matchKey = normalizeMappingKey(match[1]);
        console.log('Using matched version as lookup key:', matchKey);
        return matchKey;
      }
    }

    const fallbackKey = normalizeMappingKey(model.title || '');
    console.log('Using fallback key:', fallbackKey);
    return fallbackKey;
  }, [mainName, model.name, model.title]);

  useEffect(() => {
    setPricingDisplay(undefined);
  }, [pricingLookupKey]);

  useEffect(() => {
    return () => {
      if (hoverTimerRef.current) {
        window.clearTimeout(hoverTimerRef.current);
        hoverTimerRef.current = null;
      }
    };
  }, []);

  useLayoutEffect(() => {
    const compute = () => {
      const headerEl = headerRef.current;
      const iconEl = iconRef.current;
      const rootEl = rootRef.current;
        if (headerEl && rootEl) {
        const headerRect = headerEl.getBoundingClientRect();
        const rootRect = rootEl.getBoundingClientRect();
        // 以标题底部或图标底部为基准，优先保证覆盖从图标下方开始
        let topPx = headerRect.bottom - rootRect.top;
        if (iconEl) {
          const iconRect = iconEl.getBoundingClientRect();
          topPx = Math.max(topPx, iconRect.bottom - rootRect.top + 12); // 保证距图标底部至少 12px
        }
        // 最小顶部留白，避免 overlay 紧贴边缘；提高到 80px 以避免覆盖图标
        topPx = Math.max(topPx, 80);
        setOverlayTopPx(topPx);
      } else if (headerEl) {
        setOverlayTopPx(headerEl.offsetHeight + 8);
      }
    };

    compute();
    const onResize = () => compute();
    window.addEventListener('resize', onResize);
    return () => window.removeEventListener('resize', onResize);
  }, [headerRef, rootRef]);

  const loadPricing = useCallback(async () => {
    if (!pricingLookupKey) {
      console.log('No pricingLookupKey, setting display to null');
      setPricingDisplay(null);
      return;
    }
    if (pricingDisplay !== undefined && pricingDisplay !== null) {
      console.log('Pricing display already set, returning');
      return;
    }

    if (pricingCache.has(pricingLookupKey)) {
      const cached = pricingCache.get(pricingLookupKey);
      if (cached) {
        console.log('Using cached pricing:', cached);
        setPricingDisplay(cached);
        return;
      }
    }

    try {
      setPricingLoading(true);
      console.log('Loading pricing for:', pricingLookupKey);
      let resolvedCode = pricingLookupKey;
      try {
        const mapping = await getPricingMappingLookup();
        resolvedCode = mapping.get(pricingLookupKey) || pricingLookupKey;
        console.log('Resolved code:', resolvedCode);
      } catch (mappingError) {
        console.log('Mapping error:', mappingError);
        resolvedCode = pricingLookupKey;
      }
      console.log('Fetching pricing for:', resolvedCode);
      const response = await modelApi.getParsedPricing(resolvedCode);
      console.log('Response:', response);
      const pricing = response?.data?.model_pricing;
      console.log('Pricing data:', pricing);
      const lines = formatPricingLines(pricing);
      console.log('Formatted lines:', lines);
      const display = lines.length ? { modelCode: resolvedCode, lines } : null;
      console.log('Display data:', display);
      pricingCache.set(pricingLookupKey, display);
      setPricingDisplay(display);
    } catch (error) {
      console.log('Error loading pricing:', error);
      setPricingDisplay(null);
    } finally {
      setPricingLoading(false);
    }
  }, [pricingDisplay, pricingLookupKey]);

  const pricingMaxLines = 4;

  // 取消悬停延迟，立即显示价格信息（去掉延迟动画）
  const hoverDelay = 0;

  return (
    <div
      ref={rootRef}
      className="bg-white px-6 pt-6 pb-0 rounded-2xl border border-gray-100 hover:shadow-2xl hover:shadow-gray-200/50 transition-all duration-300 group flex flex-col h-full relative overflow-hidden"
      onMouseEnter={() => {
        if (hoverTimerRef.current) {
          window.clearTimeout(hoverTimerRef.current);
          hoverTimerRef.current = null;
        }
        if (hoverDelay <= 0) {
          setShowOverlay(true);
          loadPricing();
        } else {
          hoverTimerRef.current = window.setTimeout(() => {
            setShowOverlay(true);
            loadPricing();
            hoverTimerRef.current = null;
          }, hoverDelay);
        }
      }}
      onMouseLeave={() => {
        if (hoverTimerRef.current) {
          window.clearTimeout(hoverTimerRef.current);
          hoverTimerRef.current = null;
        }
        setShowOverlay(false);
      }}
    >
      {/* 右上角多标签显示 */}
      <div className="absolute top-0 right-3 z-20 flex flex-col items-end">
        <div className="flex items-center rounded-bl-xl rounded-tr-lg shadow-md overflow-hidden min-h-[36px]" style={{ clipPath: 'polygon(0 0, 100% 0, 100% 100%, 15% 100%)' }}>
          {shouldShowNew && (
            <div className="bg-orange-500 px-2.5 py-1 flex items-center">
              <span className="text-orange-50 text-[10px] font-bold whitespace-nowrap" style={{ textShadow: '0 1px 2px rgba(0,0,0,0.3)' }}>New</span>
            </div>
          )}
          {versionTag && versionTag !== 'New' && (
            <div className={`bg-purple-500 px-2.5 py-1 flex items-center ${shouldShowNew ? 'ml-0.5' : ''}`}>
              <span className="text-purple-50 text-[10px] font-bold whitespace-nowrap" style={{ textShadow: '0 1px 2px rgba(0,0,0,0.3)' }}>{versionTag}</span>
            </div>
          )}
          {versionTag && versionTag === 'New' && !shouldShowNew && (
            <div className="bg-orange-500 px-2.5 py-1 flex items-center">
              <span className="text-orange-50 text-[10px] font-bold whitespace-nowrap" style={{ textShadow: '0 1px 2px rgba(0,0,0,0.3)' }}>New</span>
            </div>
          )}
          {bailianTag && (
            <div className={`bg-purple-500 px-2.5 py-1 flex items-center ${shouldShowNew ? 'ml-0.5' : ''}`}>
              <span className="text-purple-50 text-[10px] font-bold whitespace-nowrap" style={{ textShadow: '0 1px 2px rgba(0,0,0,0.3)' }}>{bailianTag}</span>
            </div>
          )}
        </div>
        <button
          onClick={() => {
            const detailCode = pricingLookupKey || model.title || model.name;
            if (!detailCode) return;
            navigate(`/models/pricing/${encodeURIComponent(detailCode)}`);
          }}
          className="mt-1 px-3 py-1.5 text-xs text-blue-600 font-medium rounded-lg backdrop-blur-md bg-blue-50/70 border border-blue-100/50 hover:bg-blue-100/80 hover:text-blue-700 hover:border-blue-200/60 transition-all duration-200 shadow-sm z-30"
        >
          查看详情
        </button>
      </div>
        {/* ‘查看详情’ 按钮已移动到标题容器内以靠近模型名称（见下方） */}
      
      {/* 悬停时覆盖式显示价格与按钮（动态起始位置：基于标题高度，避免遮挡模型名称） */}
      {showOverlay ? (
        <div
          className="absolute left-0 right-0 bottom-0 z-10"
          style={overlayTopPx ? { top: `${overlayTopPx}px`, height: `calc(100% - ${overlayTopPx}px)` } : undefined}
        >
          <div style={{ position: 'absolute', left: 0, right: 0, top: 0, bottom: 0 }}>
            <div className="h-full bg-white/95 rounded-b-2xl p-4 flex flex-col justify-between overflow-hidden">
              <div className="text-xs text-gray-700 overflow-auto">
                <div className="font-semibold text-gray-900 mb-2 text-xs">价格信息</div>
                {pricingLoading && <div className="text-gray-500 text-xs">加载中...</div>}
                {!pricingLoading && pricingDisplay?.lines?.length ? (() => {
                  // 只取有折扣的行，或第一条有价格的行，做简洁展示
                  const discountLines = pricingDisplay.lines.filter(l => l.original);
                  const showLines = discountLines.length > 0
                    ? discountLines.slice(0, 2)
                    : pricingDisplay.lines.filter(l => !l.text.includes('输入范围')).slice(0, 2);
                  return (
                    <ul className="space-y-1.5">
                      {showLines.map((line, idx) => (
                        <li key={idx}>
                          {line.original ? (
                            <div className="flex items-center gap-1 flex-wrap">
                              <span className="line-through text-gray-400 text-[10px] leading-tight">{line.original}</span>
                              {line.discountLabel && (
                                <span className="px-1 py-0.5 bg-red-500 text-white text-[9px] font-bold rounded leading-none flex-shrink-0">
                                  {line.discountLabel}
                                </span>
                              )}
                              <span className="text-blue-600 font-semibold text-[11px] leading-tight">{line.text}</span>
                            </div>
                          ) : (
                            <span className="text-gray-700 text-[11px] leading-tight">{line.text}</span>
                          )}
                        </li>
                      ))}
                      <li className="text-[10px] text-gray-400 pt-0.5">点击查看详情了解完整价格</li>
                    </ul>
                  );
                })() : null}
                {!pricingLoading && !pricingDisplay?.lines?.length && (
                  <div className="text-gray-500 text-xs">暂无价格信息</div>
                )}
              </div>
            </div>
          </div>
        </div>
      ) : null}
      
      {/* 左侧图标和标题区域 */}
      <div ref={headerRef} className="flex items-start mb-4 relative z-0 gap-2">
        <div className="flex items-start space-x-4 flex-1 min-w-0 pr-16">
          {/* 图标 */}
          <div ref={iconRef} className="w-14 h-14 bg-purple-50 rounded-xl flex items-center justify-center border border-purple-100 shadow-inner group-hover:scale-110 transition-transform duration-300 flex-shrink-0">
            {bailianData?.image ? (
              <img src={bailianData.image} alt={model.name} className="w-10 h-10 object-contain" />
            ) : model.img ? (
              <img src={model.img} alt={model.name} className="w-10 h-10 object-contain" />
            ) : (
              // 如果没有图片，则根据模型分类显示默认图标
              <div className="w-10 h-10 flex items-center justify-center rounded-lg bg-blue-50">
                {(() => {
                  const Icon = getCategoryIcon(model.category);
                  return <Icon className="w-6 h-6 text-blue-500" />;
                })()}
              </div>
            )}
          </div>
          
          {/* 标题和版本（包含右侧的“查看详情”按钮） */}
          <div className="flex flex-col flex-1 min-w-0 overflow-hidden relative">
            <div className="flex items-start justify-between gap-3">
              <h3 className="text-lg font-bold text-gray-900 group-hover:text-blue-600 transition-colors leading-tight mb-1 truncate flex-1">{mainName}</h3>
            </div>
            {versionInfo && (
              versionDisplayMode === 'bailian' ? (
                <div className="flex items-center gap-1.5 text-xs text-gray-500 whitespace-nowrap min-w-0">
                  <FileText className="w-3 h-3 flex-shrink-0" />
                  <span className="flex-shrink-0">最新版本</span>
                  <span className="text-gray-400 truncate min-w-0">{versionInfo}</span>
                </div>
              ) : (
                <div className="flex items-center gap-1.5 text-sm text-gray-500 whitespace-nowrap min-w-0">
                  <FileText className="w-3 h-3 flex-shrink-0" />
                  <span className="truncate min-w-0">{versionInfo}</span>
                </div>
              )
            )}

            {/* 查看详情 按钮已移动到标题行最右侧 */}
          </div>
          
        </div>
        {/* 右上角靠左的“查看详情”入口（通过绝对定位显示，避免覆盖最右侧标签） */}
      </div>

      {/* 描述 */}
      <div className="relative mb-4 flex-1">
        <p className="text-sm text-gray-600 leading-relaxed max-h-[4.5rem] overflow-y-auto relative z-0 pr-1">
          {model.description}
        </p>
      </div>

      {/* 底部：关键词和日期 */}
      <div className="flex items-center justify-between pb-4 border-b border-gray-100 relative z-0">
        <div className="flex flex-wrap gap-1.5 flex-1">
          {(model.keyword || '')
            .split('\n')
            .map(t => t.trim())
            .filter(Boolean)
            .map(t => (
              <span key={t} className="px-2.5 py-1 bg-gray-50 text-gray-600 text-[10px] font-medium rounded-md border border-gray-100">
                {t}
              </span>
            ))}
        </div>
        {bailianData?.date && (
          <span className="text-xs text-gray-400 ml-2">{bailianData.date}</span>
        )}
      </div>

      {/* 右下角时间显示 */}
      {model.time && (
        <div className="absolute bottom-4 right-6 text-xs text-gray-400 z-0">
          {model.time}
        </div>
      )}
    </div>
  );
};

export default ModelCard;