import { describe, it, expect } from 'vitest'
import {
  getMentorBulkAssignmentTemplate,
  getTeamMentorIntroductionTemplate,
} from '@/lib/email'

describe('getMentorBulkAssignmentTemplate', () => {
  it('includes team-member emails, the instructions block, and a custom note', () => {
    const t = getMentorBulkAssignmentTemplate(
      'Alice',
      [
        {
          title: 'Reef Project',
          url: 'https://x/mentor/workspace/1',
          teamMembers: [{ name: 'Bob', email: 'bob@team.com' }],
        },
      ],
      'https://x/mentor',
      'Reach out <b>now</b> & soon',
    )
    expect(t.html).toContain('bob@team.com')
    expect(t.html).toContain('How to mentor on MOPC')
    // The admin-supplied custom note must be HTML-escaped in the HTML body.
    expect(t.html).toContain('&lt;b&gt;')
    expect(t.html).not.toContain('<b>now</b>')
    expect(t.text).toContain('bob@team.com')
    expect(t.text).toContain('How to mentor on MOPC')
    // The plain-text body keeps the raw note unescaped.
    expect(t.text).toContain('Reach out <b>now</b> & soon')
  })

  it('renders without team members or note (backward compatible)', () => {
    const t = getMentorBulkAssignmentTemplate(
      'Alice',
      [{ title: 'P', url: 'https://x/p' }],
      'https://x/mentor',
    )
    expect(t.html).toContain('How to mentor on MOPC')
    // Custom-note box uses the #fff7ed background; absent when no note passed.
    expect(t.html).not.toContain('#fff7ed')
  })
})

describe('getTeamMentorIntroductionTemplate', () => {
  it('includes mentor + teammate emails, the instructions block, and a custom note', () => {
    const t = getTeamMentorIntroductionTemplate(
      'Bob',
      'Reef Project',
      [{ name: 'Alice', email: 'alice@mentor.com' }],
      'https://x/applicant/mentor',
      [{ name: 'Carol', email: 'carol@team.com' }],
      'Welcome aboard!',
    )
    expect(t.html).toContain('alice@mentor.com')
    expect(t.html).toContain('carol@team.com')
    expect(t.html).toContain('Working with your mentor')
    expect(t.html).toContain('Welcome aboard!')
    // Mirror coverage on the plain-text path.
    expect(t.text).toContain('alice@mentor.com')
    expect(t.text).toContain('carol@team.com')
    expect(t.text).toContain('Welcome aboard!')
  })

  it('renders without teammates or note (backward compatible)', () => {
    const t = getTeamMentorIntroductionTemplate(
      'Bob',
      'Reef Project',
      [{ name: 'Alice', email: 'alice@mentor.com' }],
      'https://x/applicant/mentor',
    )
    expect(t.html).toContain('Working with your mentor')
    expect(t.html).not.toContain('#fff7ed')
  })
})