import { NextResponse } from "next/server";
import { discoverBeadsDir, getRepoUrls } from "@/lib/discover";
import { readFileSync, existsSync } from "fs";
import { join } from "path";
import { parse as parseYaml } from "yaml";

export const dynamic = "force-dynamic";

export async function GET() {
  try {
    const discovery = discoverBeadsDir();

    // Read repos list from config.yaml
    let repos: string[] = ["."];
    const configPath = join(discovery.beadsDir, "config.yaml");
    try {
      if (existsSync(configPath)) {
        const content = readFileSync(configPath, "utf-8");
        const config = parseYaml(content);
        const additional = config?.repos?.additional;
        if (Array.isArray(additional)) {
          repos = [config?.repos?.primary || ".", ...additional];
        }
      }
    } catch {
      // config.yaml unreadable — use defaults
    }

    // Build prefix → GitHub URL mapping from git remotes
    const repoUrls = getRepoUrls(discovery.beadsDir);

    return NextResponse.json({
      name: discovery.issuePrefix || discovery.repoName,
      prefix: discovery.issuePrefix || null,
      repoCount: 1 + discovery.additionalRepos,
      repos,
      repoUrls,
    });
  } catch {
    // No .beads/ found — return safe defaults
    return NextResponse.json({
      name: "Beads",
      prefix: null,
      repoCount: 0,
      repos: [],
    });
  }
}