import { createClient } from '@/lib/supabase/server'
import { NextResponse } from 'next/server'
import { requireCompanyId } from '@/lib/company/context'
import { requireWritePermission } from '@/lib/auth/require-write'

/**
 * POST /api/transactions/[id]/ignore
 *
 * Mark a bank transaction as ignored so it stops surfacing in the bank
 * reconciliation view (and other "to book" funnels) without creating a
 * verifikation. Use case: tiny ränteintäkter, rounding noise, opening-balance
 * artefacts — anything the user wants off the unmatched list but doesn't want
 * to fabricate a journal entry for.
 *
 * Refuses when the transaction is already booked; once a verifikation exists,
 * the proper way to revisit it is /uncategorize (storno).
 */
export async function POST(
  _request: Request,
  { params }: { params: Promise<{ id: string }> }
) {
  const supabase = await createClient()
  const { id } = await params

  const { data: { user } } = await supabase.auth.getUser()
  if (!user) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  const writeCheck = await requireWritePermission(supabase, user.id)
  if (!writeCheck.ok) return writeCheck.response

  const companyId = await requireCompanyId(supabase, user.id)

  const { data: transaction, error: fetchError } = await supabase
    .from('transactions')
    .select('id, journal_entry_id, is_ignored')
    .eq('id', id)
    .eq('company_id', companyId)
    .single()

  if (fetchError || !transaction) {
    return NextResponse.json({ error: 'Transaction not found' }, { status: 404 })
  }

  if (transaction.journal_entry_id) {
    return NextResponse.json(
      { error: 'Transaktionen är redan bokförd — använd Avmatcha eller backa verifikationen för att ändra status.' },
      { status: 409 }
    )
  }

  if (transaction.is_ignored) {
    return NextResponse.json({ success: true, already_ignored: true })
  }

  const { error: updateError } = await supabase
    .from('transactions')
    .update({ is_ignored: true })
    .eq('id', id)
    .eq('company_id', companyId)

  if (updateError) {
    return NextResponse.json({ error: updateError.message }, { status: 500 })
  }

  return NextResponse.json({ success: true })
}

/**
 * DELETE /api/transactions/[id]/ignore
 *
 * Reverse a previous ignore. The row comes back into the unmatched list with
 * no further side effects — we never created a verifikation, so there's
 * nothing to storno.
 */
export async function DELETE(
  _request: Request,
  { params }: { params: Promise<{ id: string }> }
) {
  const supabase = await createClient()
  const { id } = await params

  const { data: { user } } = await supabase.auth.getUser()
  if (!user) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  const writeCheck = await requireWritePermission(supabase, user.id)
  if (!writeCheck.ok) return writeCheck.response

  const companyId = await requireCompanyId(supabase, user.id)

  const { error: updateError } = await supabase
    .from('transactions')
    .update({ is_ignored: false })
    .eq('id', id)
    .eq('company_id', companyId)

  if (updateError) {
    return NextResponse.json({ error: updateError.message }, { status: 500 })
  }

  return NextResponse.json({ success: true })
}