All files / web/src/app/api/worksheets/preview route.ts

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
import { NextResponse } from 'next/server'
import { generateWorksheetPreview } from '@/app/create/worksheets/generatePreview'
import type { WorksheetFormState } from '@/app/create/worksheets/types'
import { withAuth } from '@/lib/auth/withAuth'

export const dynamic = 'force-dynamic'

/**
 * POST /api/worksheets/preview
 * Generate a preview of a worksheet configuration
 */
export const POST = withAuth(async (request) => {
  try {
    const body = await request.json()
    const { config } = body as { config: WorksheetFormState }

    if (!config) {
      return NextResponse.json({ success: false, error: 'Missing config' }, { status: 400 })
    }

    // Calculate derived state fields
    const problemsPerPage = config.problemsPerPage ?? 20
    const pages = config.pages ?? 1
    const cols = config.cols ?? 5
    const rows = Math.ceil((problemsPerPage * pages) / cols)
    const total = problemsPerPage * pages

    // Add date, seed, and derived fields if missing
    const fullConfig: WorksheetFormState = {
      ...config,
      date:
        config.date ||
        new Date().toLocaleDateString('en-US', {
          month: 'long',
          day: 'numeric',
          year: 'numeric',
        }),
      seed: config.seed || Date.now() % 2147483647,
      rows,
      total,
    }

    // Generate preview
    const result = await generateWorksheetPreview(fullConfig)

    if (!result.success) {
      return NextResponse.json(
        {
          success: false,
          error: result.error,
          details: result.details,
        },
        { status: 422 }
      )
    }

    return NextResponse.json({
      success: true,
      pages: result.pages,
    })
  } catch (error) {
    console.error('Preview generation error:', error)
    return NextResponse.json(
      {
        success: false,
        error: 'Internal server error',
        details: error instanceof Error ? error.message : String(error),
      },
      { status: 500 }
    )
  }
})