import { describe, expect, it } from 'vitest'
import { resolveMessage, renderTemplate, resolveSetting, type MessageRow, type SettingRow } from '@sims/config'

const CTX = { tenantId: 't1', storeId: 's1', counterId: 'c1', userId: 'u1' }

describe('settings hierarchy — nearest scope wins', () => {
  const rows: SettingRow[] = [
    { scopeType: 'system', scopeId: '', key: 'discount.capBp', value: '1000' },
    { scopeType: 'tenant', scopeId: 't1', key: 'discount.capBp', value: '1500' },
    { scopeType: 'store', scopeId: 's1', key: 'discount.capBp', value: '500' },
  ]
  it('store overrides tenant overrides system', () => {
    expect(resolveSetting(rows, 'discount.capBp', CTX, '2026-07-09')).toEqual({
      value: '500',
      scope: 'store',
    })
  })
  it('falls through when the nearer scope has no row', () => {
    const noStore = { ...CTX, storeId: 's-other' }
    expect(resolveSetting(rows, 'discount.capBp', noStore, '2026-07-09')?.value).toBe('1500')
  })
  it('system default applies when nothing overrides', () => {
    expect(resolveSetting(rows, 'discount.capBp', { tenantId: 'tx' }, '2026-07-09')?.value).toBe('1000')
  })
  it('returns undefined for unknown keys', () => {
    expect(resolveSetting(rows, 'nope', CTX, '2026-07-09')).toBeUndefined()
  })
})

describe('settings — effective dating', () => {
  const rows: SettingRow[] = [
    { scopeType: 'system', scopeId: '', key: 'gst.roundToRupee', value: 'true' },
    { scopeType: 'system', scopeId: '', key: 'gst.roundToRupee', value: 'false', effectiveFrom: '2026-08-01' },
  ]
  it('picks the latest row not after the target date', () => {
    expect(resolveSetting(rows, 'gst.roundToRupee', {}, '2026-07-31')?.value).toBe('true')
    expect(resolveSetting(rows, 'gst.roundToRupee', {}, '2026-08-01')?.value).toBe('false')
  })
})

describe('message catalog — language fallback chain', () => {
  const rows: MessageRow[] = [
    { code: 'BILL_ESHARE', channel: 'whatsapp', lang: 'en', template: 'Hi {name}, your bill of {amount}' },
    { code: 'BILL_ESHARE', channel: 'whatsapp', lang: 'hi', template: 'नमस्ते {name}, आपका बिल {amount}' },
    { code: 'BILL_ESHARE', channel: 'whatsapp', lang: 'ml', template: 'നമസ്കാരം {name}, ബിൽ {amount}' },
  ]
  it('prefers user language, then store, then English', () => {
    expect(resolveMessage(rows, 'BILL_ESHARE', 'whatsapp', { userLang: 'ml' })?.lang).toBe('ml')
    expect(resolveMessage(rows, 'BILL_ESHARE', 'whatsapp', { userLang: 'ta', storeLang: 'hi' })?.lang).toBe('hi')
    expect(resolveMessage(rows, 'BILL_ESHARE', 'whatsapp', { userLang: 'ta' })?.lang).toBe('en')
  })
  it('returns undefined for unknown codes (caller surfaces the raw key in dev)', () => {
    expect(resolveMessage(rows, 'NOPE', 'whatsapp', {})).toBeUndefined()
  })
  it('renders placeholders; missing vars stay visible', () => {
    expect(renderTemplate('Hi {name}, bill {amount}', { name: 'Lakshmi', amount: '₹1,431.00' })).toBe(
      'Hi Lakshmi, bill ₹1,431.00',
    )
    expect(renderTemplate('Hi {name}', {})).toBe('Hi {name}')
  })
})