/**
 * 下一步行动建议生成逻辑
 */

import type {
  ActionContext,
  ActionRule,
  NextAction,
} from "@/types/next-action";

// 行动定义类型（与 ActionRule 中的 action 类型一致）
type ActionDefinition = Omit<NextAction, "id" | "priority" | "href">;

// 生成唯一ID
function generateActionId(): string {
  return `action_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
}

// 创建行动项
function createAction(
  base: ActionDefinition,
  priority: NextAction["priority"],
): NextAction {
  return {
    ...base,
    href: base.actionUrl, // href 与 actionUrl 保持一致
    id: generateActionId(),
    priority,
  };
}

// 默认行动规则 - 新用户无数据
const newUserRules: ActionRule[] = [
  {
    condition: (ctx) => !ctx.hasBrands || ctx.brandCount === 0,
    primaryAction: {
      title: "创建第一个品牌",
      description:
        "开始您的品牌分析之旅，创建第一个品牌后即可获得详细的AI认知度评分。",
      actionText: "创建品牌",
      actionUrl: "/brands",
      icon: "🎯",
    },
    secondaryAction: null,
    optionalAction: {
      title: "了解GEO",
      description: "了解GEO平台如何帮助您监控品牌在AI平台的表现。",
      actionText: "了解更多",
      actionUrl: "/dashboard/reports",
      icon: "📚",
    },
  },
];

// 有数据但评分低的规则
const lowScoreRules: ActionRule[] = [
  {
    condition: (ctx) =>
      ctx.hasData &&
      ctx.overallScore > 0 &&
      ctx.overallScore < 60 &&
      ctx.competitorCount > 0,
    primaryAction: {
      title: "查看差距分析",
      description: "您的品牌在多个平台落后于竞品，点击查看详细差距分析。",
      actionText: "查看差距分析",
      actionUrl: "/compare",
      icon: "📊",
    },
    secondaryAction: {
      title: "添加更多竞品",
      description: "添加更多竞品可以获得更完整的对比分析。",
      actionText: "添加竞品",
      actionUrl: "/brands",
      icon: "👥",
    },
    optionalAction: {
      title: "设置预警",
      description: "设置竞品超越预警，第一时间获知竞争对手的动态变化。",
      actionText: "立即设置",
      actionUrl: "/dashboard/settings",
      icon: "🔔",
    },
  },
];

// 评分高但无增长的规则
const highScoreNoGrowthRules: ActionRule[] = [
  {
    condition: (ctx) =>
      ctx.hasData && ctx.overallScore >= 60 && ctx.scoreChange <= 0,
    primaryAction: {
      title: "设置涨粉预警",
      description: "您的品牌评分较高但增长停滞，设置预警监控潜在风险。",
      actionText: "设置预警",
      actionUrl: "/dashboard/settings",
      icon: "📈",
    },
    secondaryAction: {
      title: "对比历史趋势",
      description: "查看品牌评分的历史变化趋势，分析增长机会。",
      actionText: "查看趋势",
      actionUrl: "/dashboard/reports",
      icon: "📉",
    },
    optionalAction: {
      title: "导出报告",
      description: "导出详细的分析报告，用于内部汇报或战略制定。",
      actionText: "导出报告",
      actionUrl: "/dashboard/reports",
      icon: "📄",
    },
  },
];

// 竞品威胁规则
const competitorThreatRules: ActionRule[] = [
  {
    condition: (ctx) => ctx.competitorCount > 0 && ctx.hasData,
    primaryAction: {
      title: "查看差距分析",
      description:
        "竞品正在逼近或超越您的品牌，点击查看详细分析并制定应对策略。",
      actionText: "查看差距分析",
      actionUrl: "/compare",
      icon: "⚠️",
    },
    secondaryAction: {
      title: "设置预警",
      description: "设置竞品超越预警，第一时间获知竞争对手的动态变化。",
      actionText: "设置预警",
      actionUrl: "/dashboard/settings",
      icon: "🔔",
    },
    optionalAction: {
      title: "添加查询词",
      description: "添加更多查询词以获得更完整的品牌分析。",
      actionText: "添加查询词",
      actionUrl: "/dashboard/queries",
      icon: "🔍",
    },
  },
];

// 正常数据状态规则
const normalDataRules: ActionRule[] = [
  {
    condition: (ctx) => ctx.hasData && ctx.hasQueryHistory,
    primaryAction: {
      title: "继续优化",
      description: "您的品牌表现良好，继续保持并关注最新动态。",
      actionText: "查看详情",
      actionUrl: "/dashboard",
      icon: "✨",
    },
    secondaryAction: {
      title: "对比分析",
      description: "与竞品进行对比分析，发现更多优化机会。",
      actionText: "查看对比",
      actionUrl: "/compare",
      icon: "📊",
    },
    optionalAction: {
      title: "导出报告",
      description: "导出分析报告用于内部汇报。",
      actionText: "导出报告",
      actionUrl: "/dashboard/reports",
      icon: "📄",
    },
  },
];

// 所有规则按优先级排序
const allRules: ActionRule[] = [
  ...newUserRules,
  ...lowScoreRules,
  ...highScoreNoGrowthRules,
  ...competitorThreatRules,
  ...normalDataRules,
];

/**
 * 根据上下文生成行动建议
 */
export function generateNextActions(context: ActionContext): NextAction[] {
  const actions: NextAction[] = [];

  // 遍历规则，找到第一个匹配的
  for (const rule of allRules) {
    if (rule.condition(context)) {
      // 添加主要行动
      actions.push(createAction(rule.primaryAction, "primary"));

      // 添加次要行动
      if (rule.secondaryAction) {
        actions.push(createAction(rule.secondaryAction, "secondary"));
      }

      // 添加可选行动
      if (rule.optionalAction) {
        actions.push(createAction(rule.optionalAction, "optional"));
      }

      break; // 找到第一个匹配规则后停止
    }
  }

  // 如果没有任何规则匹配，返回默认行动
  if (actions.length === 0) {
    actions.push(
      createAction(
        {
          title: "开始分析",
          description: "创建您的第一个品牌，开始GEO品牌健康分析。",
          actionText: "立即创建",
          actionUrl: "/brands",
          icon: "🚀",
        },
        "primary",
      ),
    );
    actions.push(
      createAction(
        {
          title: "查看教程",
          description: "了解如何使用GEO平台监控您的品牌。",
          actionText: "查看教程",
          actionUrl: "/dashboard/reports",
          icon: "📚",
        },
        "secondary",
      ),
    );
  }

  return actions;
}

/**
 * 获取行动建议的缓存key
 */
export function getCacheKey(context: ActionContext): string {
  return `next_actions_${context.currentPage}_${context.brandId || "global"}_${context.overallScore}`;
}

/**
 * 判断是否可以使用缓存
 */
export function canUseCache(
  cachedActions: NextAction[] | undefined,
  _context: ActionContext,
): boolean {
  if (!cachedActions || cachedActions.length === 0) {
    return false;
  }

  // 简单缓存策略：1分钟内不需要重新生成
  // 这里可以通过localStorage存储时间戳来更精确控制
  return true;
}