import type { ContentZone, ContentItem } from './types';
import { STATS } from '@/lib/constants/stats';
import { SERVICES } from '@/lib/constants/services';
import { getFeaturedCases } from '@/lib/constants/cases';
import { NEWS } from '@/lib/constants/news';
import { SOLUTIONS } from '@/lib/constants/solutions';

function createBaseItem(id: string, modelCode: string, title: string, slug: string, index: number): Omit<ContentItem, 'data'> {
  return {
    id,
    modelId: modelCode,
    modelCode,
    title,
    slug,
    status: 'published',
    version: 1,
    sortOrder: index,
    createdAt: '2024-01-01T00:00:00Z',
    updatedAt: '2024-01-01T00:00:00Z',
    publishedAt: '2024-01-01T00:00:00Z',
    createdBy: 'system',
    updatedBy: 'system',
  };
}

function statToContentItem(stat: Record<string, unknown>, index: number): ContentItem {
  return {
    ...createBaseItem(`stat-${index}`, 'stat-item', String(stat.label || ''), `stat-${index}`, index),
    data: {
      icon: stat.icon,
      label: stat.label,
      value: stat.value,
      suffix: stat.suffix,
      prefix: stat.prefix || '',
      decimals: stat.decimals || 0,
      description: stat.description || '',
      trendValue: stat.trend || '',
      trendDirection: typeof stat.trend === 'string' && stat.trend.startsWith('+') ? 'up' : 'down',
      accentColor: stat.color || 'brand',
    },
  };
}

function serviceToContentItem(service: { id: string; title: string; description: string; icon?: string; overview?: string; features?: unknown[]; benefits?: unknown[] }, index: number): ContentItem {
  return {
    ...createBaseItem(service.id, 'service', service.title, service.id, index),
    data: {
      description: service.description,
      icon: service.icon,
      overview: service.overview,
      features: service.features || [],
      benefits: service.benefits || [],
    },
  };
}

function caseStudyToContentItem(cs: { id: string; title: string; slug: string; client?: string; industry?: string; subtitle?: string; challenge?: string; result?: string; metrics?: unknown[]; color?: string; featured?: boolean }, index: number): ContentItem {
  return {
    ...createBaseItem(cs.id, 'case-study', cs.title, cs.slug, index),
    data: {
      client: cs.client,
      industry: cs.industry,
      subtitle: cs.subtitle,
      challenge: cs.challenge,
      result: cs.result,
      metrics: cs.metrics || [],
      color: cs.color,
      featured: cs.featured,
    },
  };
}

function newsToContentItem(news: { id: string; title: string; excerpt?: string; date?: string; category?: string; image?: string; content?: string }, index: number): ContentItem {
  return {
    ...createBaseItem(news.id, 'news', news.title, news.id, index),
    data: {
      excerpt: news.excerpt,
      date: news.date,
      category: news.category,
      image: news.image,
      content: news.content,
    },
  };
}

function solutionToContentItem(solution: { id: string; title: string; description: string; icon?: string; industry?: string; overview?: string }, index: number): ContentItem {
  return {
    ...createBaseItem(solution.id, 'solution', solution.title, solution.id, index),
    data: {
      description: solution.description,
      icon: solution.icon,
      industry: solution.industry || '',
      overview: solution.overview || '',
    },
  };
}

export function getMockHomeHeroBanner(): ContentItem {
  return {
    ...createBaseItem('hero-home-main', 'hero-banner', '企业数字化转型的可靠伙伴', 'hero-home-main', 0),
    data: {
      heading: '企业数字化转型的可靠伙伴',
      subheading: '深耕企业数字化 10+ 年',
      description: '从战略规划到落地实施，为成长型企业提供端到端的数字化解决方案。以务实的态度、专业的能力、长期的陪伴，帮助企业实现可持续增长。',
      primaryCtaText: '了解解决方案',
      primaryCtaLink: '/solutions',
      secondaryCtaText: '联系我们',
      secondaryCtaLink: '/contact',
      theme: 'brand',
    },
  };
}

export function getMockHomeStatsZone(): ContentZone {
  const statList = Array.isArray(STATS) ? STATS : (STATS as { stats?: unknown[] }).stats || [];
  const items = statList.slice(0, 4).map((s, i) => statToContentItem(s as Record<string, unknown>, i));
  return {
    id: 'zone-home-stats',
    code: 'home-stats',
    name: '首页数据指标区',
    zoneKey: 'home-stats',
    pageCode: 'home',
    allowedModels: ['stat-item'],
    items: items.map((item, i) => ({
      item,
      itemId: item.id,
      sortOrder: i,
      variant: 'default',
    })),
    settings: {
      layout: 'grid',
      columns: 4,
      gap: 'large',
    },
  };
}

export function getMockHomeServicesZone(): ContentZone {
  const items = SERVICES.slice(0, 4).map((s, i) => serviceToContentItem(s, i));
  return {
    id: 'zone-home-services',
    code: 'home-services',
    name: '首页服务区',
    zoneKey: 'home-services',
    pageCode: 'home',
    allowedModels: ['service'],
    items: items.map((item, i) => ({
      item,
      itemId: item.id,
      sortOrder: i,
      variant: 'default',
    })),
    settings: {
      layout: 'grid',
      columns: 4,
      gap: 'large',
    },
  };
}

export function getMockHomeCasesZone(): ContentZone {
  const items = getFeaturedCases().slice(0, 3).map((cs, i) => caseStudyToContentItem(cs, i));
  return {
    id: 'zone-home-cases',
    code: 'home-cases',
    name: '首页案例区',
    zoneKey: 'home-cases',
    pageCode: 'home',
    allowedModels: ['case-study'],
    items: items.map((item, i) => ({
      item,
      itemId: item.id,
      sortOrder: i,
      variant: 'default',
    })),
    settings: {
      layout: 'grid',
      columns: 3,
      gap: 'large',
    },
  };
}

export function getMockHomeNewsZone(): ContentZone {
  const items = NEWS.slice(0, 3).map((n, i) => newsToContentItem(n, i));
  return {
    id: 'zone-home-news',
    code: 'home-news',
    name: '首页新闻区',
    zoneKey: 'home-news',
    pageCode: 'home',
    allowedModels: ['news'],
    items: items.map((item, i) => ({
      item,
      itemId: item.id,
      sortOrder: i,
      variant: 'default',
    })),
    settings: {
      layout: 'grid',
      columns: 3,
      gap: 'large',
    },
  };
}

export function getMockHomeSolutionsZone(): ContentZone {
  const items = SOLUTIONS.slice(0, 4).map((s, i) => solutionToContentItem(s, i));
  return {
    id: 'zone-home-solutions',
    code: 'home-solutions',
    name: '首页方案区',
    zoneKey: 'home-solutions',
    pageCode: 'home',
    allowedModels: ['solution'],
    items: items.map((item, i) => ({
      item,
      itemId: item.id,
      sortOrder: i,
      variant: 'default',
    })),
    settings: {
      layout: 'grid',
      columns: 4,
      gap: 'large',
    },
  };
}

export function getMockContentZone(zoneKey: string, _page = 'home'): ContentZone | null {
  const zones: Record<string, ContentZone> = {
    'home-stats': getMockHomeStatsZone(),
    'home-services': getMockHomeServicesZone(),
    'home-cases': getMockHomeCasesZone(),
    'home-news': getMockHomeNewsZone(),
    'home-solutions': getMockHomeSolutionsZone(),
  };
  return zones[zoneKey] || null;
}