import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/lib/auth/authOptions';
import { query } from '@/lib/db-postgres';

const AGENT_RUNNER_URL = process.env.AGENT_RUNNER_URL ?? 'http://localhost:3333';

// GET — check the current analysis status for a project
export async function GET(
  _req: Request,
  { params }: { params: Promise<{ projectId: string }> }
) {
  const session = await getServerSession(authOptions);
  if (!session?.user?.email) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  const { projectId } = await params;

  const rows = await query<{ data: any }>(
    `SELECT data FROM fs_projects WHERE id = $1 LIMIT 1`,
    [projectId]
  );
  if (!rows.length) return NextResponse.json({ error: 'Project not found' }, { status: 404 });

  const project = rows[0].data;

  if (!project.isImport) {
    return NextResponse.json({ isImport: false });
  }

  const jobId = project.importAnalysisJobId;
  let jobStatus: Record<string, unknown> | null = null;

  // Fetch live job status from agent runner if we have a job ID
  if (jobId) {
    try {
      const jobRes = await fetch(`${AGENT_RUNNER_URL}/api/jobs/${jobId}`);
      if (jobRes.ok) {
        jobStatus = await jobRes.json() as Record<string, unknown>;

        // Sync terminal status back to the project record
        const runnerStatus = jobStatus.status as string | undefined;
        if (runnerStatus && runnerStatus !== project.importAnalysisStatus) {
          await query(
            `UPDATE fs_projects SET data = jsonb_set(data, '{importAnalysisStatus}', $1::jsonb) WHERE id = $2`,
            [JSON.stringify(runnerStatus), projectId]
          );
        }
      }
    } catch {
      // Agent runner unreachable — return last known status
    }
  }

  return NextResponse.json({
    isImport: true,
    status: project.importAnalysisStatus ?? 'pending',
    jobId,
    job: jobStatus,
    githubRepoUrl: project.githubRepoUrl,
    giteaRepo: project.giteaRepo,
  });
}

// POST — (re-)trigger an analysis job for a project
export async function POST(
  _req: Request,
  { params }: { params: Promise<{ projectId: string }> }
) {
  const session = await getServerSession(authOptions);
  if (!session?.user?.email) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  const { projectId } = await params;

  const rows = await query<{ data: any }>(
    `SELECT data FROM fs_projects WHERE id = $1 LIMIT 1`,
    [projectId]
  );
  if (!rows.length) return NextResponse.json({ error: 'Project not found' }, { status: 404 });

  const project = rows[0].data;

  if (!project.giteaRepo) {
    return NextResponse.json({ error: 'Project has no Gitea repo' }, { status: 400 });
  }

  try {
    const jobRes = await fetch(`${AGENT_RUNNER_URL}/api/agent/run`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        agent: 'ImportAnalyzer',
        task: `Analyze this codebase${project.githubRepoUrl ? ` (originally from ${project.githubRepoUrl})` : ''} and produce CODEBASE_MAP.md and MIGRATION_PLAN.md as described in your instructions.`,
        repo: project.giteaRepo,
      }),
    });

    if (!jobRes.ok) {
      const detail = await jobRes.text();
      return NextResponse.json({ error: 'Failed to start analysis', details: detail }, { status: 500 });
    }

    const jobData = await jobRes.json() as { jobId?: string };
    const jobId = jobData.jobId ?? null;

    await query(
      `UPDATE fs_projects SET data = jsonb_set(jsonb_set(data, '{importAnalysisJobId}', $1::jsonb), '{importAnalysisStatus}', '"running"') WHERE id = $2`,
      [JSON.stringify(jobId), projectId]
    );

    return NextResponse.json({ success: true, jobId, status: 'running' });
  } catch (err) {
    return NextResponse.json(
      { error: 'Failed to start analysis', details: err instanceof Error ? err.message : String(err) },
      { status: 500 }
    );
  }
}