import { describe, it, expect } from 'vitest'
import { documentHtml, rupeesInWords } from '../src/templates'

const doc = {
  id: 'd1', docType: 'INVOICE', docNo: 'INV/26-27-0001', fy: '2026-27', clientId: 'c1',
  docDate: '2026-07-10', status: 'draft', refDocId: null, taxablePaise: 10_000_00,
  cgstPaise: 900_00, sgstPaise: 900_00, igstPaise: 0, roundOffPaise: 0, payablePaise: 11_800_00,
  payload: { lines: [{ itemId: 'm1', name: 'POS Billing — yearly', hsn: '998313', qty: 1,
    unitCode: 'NOS', unitPricePaise: 10_000_00, grossPaise: 10_000_00, discountPaise: 0,
    taxablePaise: 10_000_00, taxRateBp: 1800, cgstPaise: 900_00, sgstPaise: 900_00,
    igstPaise: 0, cessPaise: 0, lineTotalPaise: 11_800_00 }], totals: {} },
} as never
const client = { id: 'c1', code: 'CL0001', name: 'Acme', stateCode: '32', address: 'Kochi',
  contacts: [], status: 'active', notes: '' } as never
const company = { 'company.name': 'Tecnostac', 'company.gstin': '', 'company.address': '',
  'company.phone': '', 'company.email': '', 'company.bank': 'HDFC ****1234' }

describe('document html', () => {
  it('renders number, SAC, Indian-grouped totals and TAX INVOICE title', () => {
    const html = documentHtml(doc, client, company)
    expect(html).toContain('INV/26-27-0001')
    expect(html).toContain('TAX INVOICE')
    expect(html).toContain('998313')          // SAC column
    expect(html).toContain('₹11,800.00')      // formatINR grouping
    expect(html).toContain('HDFC ****1234')   // bank block on invoices
  })
  it('titles a quotation QUOTATION and omits the bank block', () => {
    const html = documentHtml({ ...(doc as object), docType: 'QUOTATION', docNo: 'QT/26-27-0001' } as never, client, company)
    expect(html).toContain('QUOTATION')
    expect(html).not.toContain('HDFC')
  })
  it('renders per-line content bullets when present and nothing when absent', () => {
    const withContent = {
      ...(doc as object),
      payload: { lines: (doc as never as { payload: { lines: unknown[] } }).payload.lines,
        lineContents: [['Bulk SMS gateway', 'DLT template registration']], totals: {} },
    } as never
    const html = documentHtml(withContent, client, company)
    expect(html).toContain('<ul class="line-content">')
    expect(html).toContain('Bulk SMS gateway')
    expect(html).toContain('DLT template registration')
    // The base fixture has no lineContents, so no stray content list is emitted.
    expect(documentHtml(doc, client, company)).not.toContain('<ul class="line-content">')
  })
})

describe('rupees in words', () => {
  it('spells the payable in the Indian system', () => {
    expect(rupeesInWords(11_800_00)).toBe('Rupees Eleven Thousand Eight Hundred Only')
    expect(rupeesInWords(1_23_45_678_00)).toBe(
      'Rupees One Crore Twenty Three Lakh Forty Five Thousand Six Hundred Seventy Eight Only')
    expect(rupeesInWords(50)).toBe('Fifty Paise Only')
  })
})

describe('quotation sections (D18 WS-H)', () => {
  const line = (n: number) => ({
    itemId: `m${n}`, name: `Module ${n}`, hsn: '998313', qty: 1, unitCode: 'NOS',
    unitPricePaise: 1_000_00, grossPaise: 1_000_00, discountPaise: 0, taxablePaise: 1_000_00,
    taxRateBp: 1800, cgstPaise: 90_00, sgstPaise: 90_00, igstPaise: 0, cessPaise: 0,
    lineTotalPaise: 1_180_00,
  })
  const fiveModuleQuote = {
    ...(doc as object), docType: 'QUOTATION', docNo: 'QT/26-27-0002',
    payload: {
      lines: [1, 2, 3, 4, 5].map(line),
      totals: {},
      lineContents: [['Core ledgers', 'Day-end'], ['RTGS/NEFT'], [], ['App for members'], ['SMS 50k pack']],
    },
  } as never

  it('a 5-module quotation renders 5 titled sections, the summary line, and NO billing grid', () => {
    const html = documentHtml(fiveModuleQuote, client, company)
    expect(html.match(/class="qsection/g)).toHaveLength(5)
    expect(html.match(/class="qsection qbreak/g)).toHaveLength(4) // fresh page from the 2nd on (print)
    expect(html).toContain('This proposal covers:')
    expect(html).toContain('Module 1')
    expect(html).toContain('Core ledgers')      // per-module contents land in their section
    expect(html).toContain('SMS 50k pack')
    expect(html).not.toContain('<table class="lines">') // proposals are not billing grids
    expect(html).toContain('Grand Total')        // totals block still follows
  })

  it('a module without content prints a tight section (no empty included-block)', () => {
    const html = documentHtml(fiveModuleQuote, client, company)
    expect(html.match(/What&#39;s included/g)).toHaveLength(4) // section 3 has no contents
  })

  it('INVOICE keeps the compact billing grid — layout untouched by WS-H', () => {
    const html = documentHtml(doc, client, company)
    expect(html).toContain('<table class="lines">')
    expect(html).not.toContain('class="qsection')
  })
})