import { NextRequest, NextResponse } from "next/server";
import { query } from "@/lib/db";

export const runtime = "nodejs";

export async function GET(req: NextRequest) {
  try {
    const { searchParams } = req.nextUrl;
    const page = Math.max(1, parseInt(searchParams.get("page") || "1", 10));
    const pageSize = Math.max(1, parseInt(searchParams.get("pageSize") || "30", 10));
    const projectId = searchParams.get("projectId") || "";
    const search = searchParams.get("search") || "";
    const offset = (page - 1) * pageSize;

    const conditions: string[] = ["1=1"];
    const params: (string | number)[] = [];
    let paramIdx = 1;

    if (projectId) {
      conditions.push(`r.project = $${paramIdx++}`);
      params.push(projectId);
    }
    if (search) {
      conditions.push(`r.repo_name ILIKE $${paramIdx++}`);
      params.push(`%${search}%`);
    }

    const whereCond = conditions.join(" AND ");
    const limitIdx = paramIdx++;
    const offsetIdx = paramIdx++;

    const [reposResult, countResult] = await Promise.all([
      query<{
        id: string;
        repo_name: string;
        project_id: string;
        project_name: string;
        workspace_name: string;
        default_branch: string;
        is_private: boolean;
        created_by: string;
        created_at: Date;
        ai_code_review_enabled: boolean;
        collaborator_count: string;
        branch_count: string;
      }>(
        `SELECT
           r.id, r.repo_name, r.project as project_id,
           p.name as project_name,
           COALESCE(w.name, '') as workspace_name,
           r.default_branch, r.is_private,
           r.created_by::text as created_by,
           r.created_at::text as created_at,
           r.ai_code_review_enabled,
           (SELECT COUNT(*) FROM repo_collaborator WHERE repo = r.id)::text as collaborator_count,
           (SELECT COUNT(*) FROM repo_branch WHERE repo = r.id)::text as branch_count
         FROM repo r
         JOIN project p ON p.id = r.project
         LEFT JOIN workspace w ON w.id = p.workspace_id
         WHERE ${whereCond}
         ORDER BY r.created_at DESC
         LIMIT $${limitIdx} OFFSET $${offsetIdx}`,
        [...params, pageSize, offset]
      ),
      query<{ count: string }>(
        `SELECT COUNT(*)::text as count
         FROM repo r
         JOIN project p ON p.id = r.project
         WHERE ${whereCond}`,
        params
      ),
    ]);

    const repos = reposResult.rows.map((r) => ({
      id: r.id,
      repoName: r.repo_name,
      projectId: r.project_id,
      projectName: r.project_name,
      workspaceName: r.workspace_name,
      defaultBranch: r.default_branch,
      isPrivate: r.is_private,
      createdBy: r.created_by,
      createdAt: String(r.created_at),
      aiCodeReviewEnabled: r.ai_code_review_enabled,
      collaboratorCount: parseInt(r.collaborator_count || "0", 10),
      branchCount: parseInt(r.branch_count || "0", 10),
    }));

    const total = parseInt(countResult.rows[0]?.count || "0", 10);

    return NextResponse.json({ repos, total, page, pageSize });
  } catch (e) {
    console.error("Repos error:", e);
    return NextResponse.json({ error: "服务器错误" }, { status: 500 });
  }
}