import { NextRequest, NextResponse } from 'next/server';
import admin from '@/lib/firebase/admin';

/**
 * Update work item state (draft/final)
 */
export async function PATCH(
  request: NextRequest,
  { params }: { params: Promise<{ projectId: string; itemId: string }> }
) {
  try {
    const { projectId, itemId } = await params;
    const { state } = await request.json();

    if (!state || !['draft', 'final'].includes(state)) {
      return NextResponse.json(
        { error: 'Invalid state. Must be "draft" or "final"' },
        { status: 400 }
      );
    }

    const db = admin.firestore();

    // Update state in work item
    // For now, store in a separate collection since work items are generated from MVP checklist
    await db
      .collection('projects')
      .doc(projectId)
      .collection('workItemStates')
      .doc(itemId)
      .set(
        {
          state,
          updatedAt: admin.firestore.FieldValue.serverTimestamp(),
        },
        { merge: true }
      );

    return NextResponse.json({
      success: true,
      state,
    });
  } catch (error) {
    console.error('Error updating work item state:', error);
    return NextResponse.json(
      {
        error: 'Failed to update state',
        details: error instanceof Error ? error.message : String(error),
      },
      { status: 500 }
    );
  }
}

/**
 * Get work item state
 */
export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ projectId: string; itemId: string }> }
) {
  try {
    const { projectId, itemId } = await params;
    const db = admin.firestore();

    const stateDoc = await db
      .collection('projects')
      .doc(projectId)
      .collection('workItemStates')
      .doc(itemId)
      .get();

    if (!stateDoc.exists) {
      return NextResponse.json({
        state: 'draft', // Default state
      });
    }

    return NextResponse.json({
      state: stateDoc.data()?.state || 'draft',
      updatedAt: stateDoc.data()?.updatedAt,
    });
  } catch (error) {
    console.error('Error fetching work item state:', error);
    return NextResponse.json(
      {
        error: 'Failed to fetch state',
        details: error instanceof Error ? error.message : String(error),
      },
      { status: 500 }
    );
  }
}