import { textMatchesProgram } from "./identity.js";

export function assessCredibility(result, programName, candidate = null) {
  if (!result || result.status !== "ok") {
    return {
      level: result?.status === "no_match" ? "rejected" : "",
      label: result?.status === "no_match" ? "拒绝" : "",
      reason: result?.status === "no_match" ? "页面标题和证据不足以确认属于当前节目" : "",
    };
  }

  const titleMatch = textMatchesProgram(result.page_title, programName);
  const evidenceMatch = textMatchesProgram(result.evidence, programName);
  const candidateMatch = textMatchesProgram(candidate?.pageTitle, programName)
    || textMatchesProgram(candidate?.evidence, programName);

  if (titleMatch && evidenceMatch) {
    return {
      level: "high",
      label: "高可信",
      reason: "页面标题和提取证据均匹配当前节目",
    };
  }

  if (evidenceMatch) {
    return {
      level: "medium",
      label: "中可信",
      reason: "提取证据匹配当前节目，页面标题可能是合集或同系列入口",
    };
  }

  if (titleMatch) {
    return {
      level: "medium",
      label: "中可信",
      reason: "页面标题匹配当前节目，但提取证据未包含节目名",
    };
  }

  if (candidateMatch) {
    return {
      level: "low",
      label: "低可信",
      reason: "仅搜索候选匹配当前节目，页面证据不足",
    };
  }

  return {
    level: "rejected",
    label: "拒绝",
    reason: "页面标题和证据均未匹配当前节目",
  };
}