import { NextResponse } from 'next/server'
import { withRouteContext } from '@/lib/api/with-route-context'
import { validateBody } from '@/lib/api/validate'
import { CreateMappingRuleSchema } from '@/lib/api/schemas'
import { getErrorMessage as getUserErrorMessage } from '@/lib/errors/get-error-message'

export const GET = withRouteContext('mapping_rules.list', async (_request, ctx) => {
  const { supabase, companyId } = ctx

  const { data, error } = await supabase
    .from('mapping_rules')
    .select('*')
    .or(`company_id.eq.${companyId},company_id.is.null`)
    .eq('is_active', true)
    .order('priority')

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

  return NextResponse.json({ data })
})

export const POST = withRouteContext(
  'mapping_rules.create',
  async (request, ctx) => {
    const { supabase, companyId, user, log } = ctx

    const result = await validateBody(request, CreateMappingRuleSchema, {
      log,
      operation: 'mapping_rules.create',
    })
    if (!result.success) return result.response
    const body = result.data

    const { data, error } = await supabase
      .from('mapping_rules')
      .insert({
        user_id: user.id,
        company_id: companyId,
        rule_name: body.rule_name,
        rule_type: body.rule_type,
        // ?? not || — the schema allows 0 for priority and confidence_score,
        // and || would silently coerce those to the defaults.
        priority: body.priority ?? 10,
        mcc_codes: body.mcc_codes ?? null,
        merchant_pattern: body.merchant_pattern ?? null,
        description_pattern: body.description_pattern ?? null,
        amount_min: body.amount_min ?? null,
        amount_max: body.amount_max ?? null,
        debit_account: body.debit_account,
        credit_account: body.credit_account,
        vat_treatment: body.vat_treatment ?? null,
        risk_level: body.risk_level ?? 'NONE',
        default_private: body.default_private ?? false,
        requires_review: body.requires_review ?? false,
        confidence_score: body.confidence_score ?? 0.9,
      })
      .select()
      .single()

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

    return NextResponse.json({ data })
  },
  { requireWrite: true },
)