/**
 * Visualization Helpers
 *
 * 数据分析和可视化辅助函数
 */

import type { TrendingProject, Analytics } from './types';

/**
 * 分析项目数据
 */
export function analyzeData(projects: TrendingProject[]): Analytics {
  // 语言分布统计
  const languageDistribution: Record<string, number> = {};
  projects.forEach(project => {
    const lang = project.language;
    languageDistribution[lang] = (languageDistribution[lang] || 0) + 1;
  });

  // 总 stars 数
  const totalStars = projects.reduce((sum, project) => {
    return sum + parseInt(project.stars.replace(/,/g, '') || 0);
  }, 0);

  // 找出 top project
  const topProject = projects.reduce((top, project) => {
    const topStars = parseInt(top.stars.replace(/,/g, '') || 0);
    const projStars = parseInt(project.stars.replace(/,/g, '') || 0);
    return projStars > topStars ? project : top;
  }, projects[0]);

  // 增长统计
  const projectsWithGrowth = projects.filter(p => p.starsThisPeriod);
  const growthValues = projectsWithGrowth.map(p =>
    parseInt(p.starsThisPeriod.replace(/[+,]/g, '') || 0)
  );

  const highestGrowth = projectsWithGrowth.reduce((highest, project) => {
    const highestValue = parseInt(highest.starsThisPeriod.replace(/[+,]/g, '') || 0);
    const projValue = parseInt(project.starsThisPeriod.replace(/[+,]/g, '') || 0);
    return projValue > highestValue ? project : highest;
  }, projectsWithGrowth[0] || projects[0]);

  const averageGrowth = growthValues.length > 0
    ? Math.round(growthValues.reduce((a, b) => a + b, 0) / growthValues.length)
    : 0;

  // 提取唯一语言列表（用于筛选）
  const languages = Object.keys(languageDistribution).sort();

  // 生成图表数据
  const growthData = projects.slice(0, 10).map(p => ({
    name: p.name.split('/')[1] || p.name,
    growth: parseInt(p.starsThisPeriod.replace(/[+,]/g, '') || 0)
  }));

  return {
    languageDistribution,
    totalStars,
    topProject,
    growthStats: {
      highest: highestGrowth,
      average: averageGrowth
    },
    languages,
    growthData
  };
}

/**
 * 格式化 stars 数字
 */
export function formatStars(starsStr: string): number {
  return parseInt(starsStr.replace(/,/g, '') || 0);
}

/**
 * 解析增长数值
 */
export function parseGrowth(growthStr: string): number {
  if (!growthStr) return 0;
  return parseInt(growthStr.replace(/[+,]/g, '') || 0);
}

export default { analyzeData, formatStars, parseGrowth };