/**
 * AGENTS.md 质量检查（/init-check 与 CLI --check 共用）
 */

import { join } from "node:path";
import { existsSync, readFileSync } from "node:fs";
import type { NotifyLevel } from "./core.ts";

export type NotifyFn = (message: string, level?: NotifyLevel) => void;

const CANDIDATES = ["AGENTS.md", "agent.md", "AGENT.md", "agents.md"];

const CHECKS: { key: string; pattern: RegExp }[] = [
  { key: "项目概述", pattern: /项目概述|概述|简介|overview/i },
  { key: "快速命令", pattern: /快速命令|命令|command|install|build|test/i },
  { key: "目录结构", pattern: /目录结构|结构|structure|src|目录/i },
  { key: "代码风格", pattern: /代码风格|风格|规范|style|convention|lint/i },
  { key: "禁止规则", pattern: /禁止|never|禁止规则|🚫|boundary|边界/i },
  { key: "Git 工作流", pattern: /git|提交|commit|分支|branch|workflow/i },
];

export function checkAgentsMd(root: string, notify: NotifyFn): number {
  const found = CANDIDATES.find((f) => existsSync(join(root, f)));

  if (!found) {
    notify("❌ 未找到 AGENTS.md", "warning");
    notify("💡 运行 codet-pi-init / /init 生成一份", "info");
    return 0;
  }

  const content = readFileSync(join(root, found), "utf-8");
  const size = content.length;
  const lines = content.split("\n").length;

  notify(`📄 找到: ${found}`, "info");
  notify(`   大小: ${size} 字符, ${lines} 行`, "info");

  notify("\n--- 质量检查 ---", "info");
  let passedCount = 0;
  for (const check of CHECKS) {
    const passed = check.pattern.test(content);
    if (passed) passedCount++;
    const icon = passed ? "✅" : "❌";
    const status = passed ? "已覆盖" : "缺失";
    notify(`  ${icon} ${check.key}: ${status}`, passed ? "info" : "warning");
  }

  const score = Math.round((passedCount / CHECKS.length) * 100);
  notify(`\n📊 完整度评分: ${score}% (${passedCount}/${CHECKS.length})`, "info");

  if (score < 50) {
    notify("💡 建议运行 codet-pi-init --force 重新生成", "warning");
  }

  return score;
}