import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from '@/lib/auth/authOptions';
import { query } from '@/lib/db-postgres';
import { randomUUID } from 'crypto';
import type { ProjectPhaseData, ProjectPhaseScores } from '@/lib/types/project-artifacts';

export async function POST(request: Request) {
  try {
    const session = await getServerSession(authOptions);
    if (!session?.user?.email) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const email = session.user.email;

    // Resolve Firebase user ID and workspace from fs_users
    const users = await query<{ id: string; data: any }>(`
      SELECT id, data FROM fs_users WHERE data->>'email' = $1 LIMIT 1
    `, [email]);

    const firebaseUserId = users[0]?.id || session.user.id || randomUUID();
    const userData = users[0]?.data || {};
    const workspace =
      userData.workspace ||
      email.split('@')[0].toLowerCase().replace(/[^a-z0-9]+/g, '-') + '-account';

    const body = await request.json();
    const {
      projectName,
      projectType,
      slug,
      vision,
      product,
      workspacePath,
      chatgptUrl,
      githubRepo,
      githubRepoId,
      githubRepoUrl,
      githubDefaultBranch,
    } = body;

    // Check slug uniqueness
    const existing = await query(`SELECT id FROM fs_projects WHERE slug = $1 LIMIT 1`, [slug]);
    if (existing.length > 0) {
      return NextResponse.json({ error: 'Project slug already exists' }, { status: 400 });
    }

    const projectId = randomUUID();
    const now = new Date().toISOString();

    const projectData = {
      id: projectId,
      name: projectName,
      slug,
      userId: firebaseUserId,
      workspace,
      projectType,
      productName: product?.name || projectName,
      productVision: vision || '',
      isForClient: product?.isForClient || false,
      hasLogo: product?.hasLogo || false,
      hasDomain: product?.hasDomain || false,
      hasWebsite: product?.hasWebsite || false,
      hasGithub: !!githubRepo,
      hasChatGPT: !!chatgptUrl,
      workspacePath: workspacePath || null,
      workspaceName: workspacePath ? workspacePath.split('/').pop() : null,
      githubRepo: githubRepo || null,
      githubRepoId: githubRepoId || null,
      githubRepoUrl: githubRepoUrl || null,
      githubDefaultBranch: githubDefaultBranch || null,
      chatgptUrl: chatgptUrl || null,
      extensionLinked: false,
      status: 'active',
      currentPhase: 'collector',
      phaseStatus: 'not_started',
      phaseData: {} as ProjectPhaseData,
      phaseScores: {} as ProjectPhaseScores,
      createdAt: now,
      updatedAt: now,
    };

    await query(`
      INSERT INTO fs_projects (id, data, user_id, workspace, slug)
      VALUES ($1, $2::jsonb, $3, $4, $5)
    `, [projectId, JSON.stringify(projectData), firebaseUserId, workspace, slug]);

    // Associate unlinked sessions for this workspace path
    if (workspacePath) {
      await query(`
        UPDATE fs_sessions
        SET data = jsonb_set(
          jsonb_set(data, '{projectId}', $1::jsonb),
          '{needsProjectAssociation}', 'false'
        )
        WHERE user_id = $2
          AND data->>'workspacePath' = $3
          AND (data->>'needsProjectAssociation')::boolean = true
      `, [JSON.stringify(projectId), firebaseUserId, workspacePath]);
    }

    console.log('[API] Created project', projectId, slug);
    return NextResponse.json({ success: true, projectId, slug, workspace });
  } catch (error) {
    console.error('[POST /api/projects/create] Error:', error);
    return NextResponse.json(
      { error: 'Failed to create project', details: error instanceof Error ? error.message : String(error) },
      { status: 500 }
    );
  }
}