import { describe, it, expect } from 'vitest'
import {
  generateId,
  createEntry,
  updateEntry,
  createGroup,
  validateEntry,
  validateGroup,
  createTrashGroup,
  isTrashGroup,
  TRASH_GROUP_ID,
  TRASH_GROUP_NAME,
  TRASH_GROUP_COLOR,
} from '../../../src/lib/models/schema.js'

describe('generateId', () => {
  it('should generate unique IDs', () => {
    const ids = new Set()
    for (let i = 0; i < 100; i++) {
      ids.add(generateId())
    }
    expect(ids.size).toBe(100)
  })

  it('should produce sortable IDs (timestamp-based)', () => {
    const id1 = generateId()
    // Small delay to ensure different timestamp
    // IDs are base36 timestamps + random, so they should be lexicographically ordered
    expect(id1).toMatch(/^[a-z0-9]+_[0-9a-f]{8}$/)
  })

  it('should contain underscore separator', () => {
    const id = generateId()
    const parts = id.split('_')
    expect(parts).toHaveLength(2)
    expect(parts[1]).toHaveLength(8)
  })
})

describe('createEntry', () => {
  it('should create an entry with required fields', () => {
    const entry = createEntry({
      title: 'GitHub',
      encryptedPassword: 'encrypted-blob',
    })
    expect(entry.id).toBeDefined()
    expect(entry.title).toBe('GitHub')
    expect(entry.encryptedPassword).toBe('encrypted-blob')
    expect(entry.createdAt).toBeDefined()
    expect(entry.updatedAt).toBe(entry.createdAt)
  })

  it('should trim title and optional fields', () => {
    const entry = createEntry({
      title: '  GitHub  ',
      username: '  user@test.com  ',
      url: '  https://github.com  ',
      notes: '  some notes  ',
      encryptedPassword: 'encrypted-blob',
    })
    expect(entry.title).toBe('GitHub')
    expect(entry.username).toBe('user@test.com')
    expect(entry.url).toBe('https://github.com')
    expect(entry.notes).toBe('some notes')
  })

  it('should set defaults for optional fields', () => {
    const entry = createEntry({
      title: 'Test',
      encryptedPassword: 'encrypted-blob',
    })
    expect(entry.username).toBe('')
    expect(entry.url).toBe('')
    expect(entry.notes).toBe('')
    expect(entry.groupId).toBe('')
    expect(entry.tags).toEqual([])
  })

  it('should accept groupId and tags', () => {
    const entry = createEntry({
      title: 'Test',
      encryptedPassword: 'encrypted-blob',
      groupId: 'group-123',
      tags: ['work', 'important'],
    })
    expect(entry.groupId).toBe('group-123')
    expect(entry.tags).toEqual(['work', 'important'])
  })
})

describe('updateEntry', () => {
  it('should preserve id and createdAt', () => {
    const existing = createEntry({
      title: 'GitHub',
      encryptedPassword: 'old-encrypted',
    })
    const updated = updateEntry(existing, { title: 'GitHub Pro' })
    expect(updated.id).toBe(existing.id)
    expect(updated.createdAt).toBe(existing.createdAt)
    // updatedAt should be >= createdAt (ISO strings are lexicographically comparable)
    expect(updated.updatedAt >= existing.updatedAt).toBe(true)
  })

  it('should update only specified fields', () => {
    const existing = createEntry({
      title: 'GitHub',
      username: 'user',
      encryptedPassword: 'old-encrypted',
      url: 'https://github.com',
      notes: 'old notes',
    })
    const updated = updateEntry(existing, { title: 'GitHub Pro' })
    expect(updated.title).toBe('GitHub Pro')
    expect(updated.username).toBe('user')
    expect(updated.encryptedPassword).toBe('old-encrypted')
    expect(updated.url).toBe('https://github.com')
    expect(updated.notes).toBe('old notes')
  })

  it('should trim updated string fields', () => {
    const existing = createEntry({
      title: 'GitHub',
      encryptedPassword: 'encrypted',
    })
    const updated = updateEntry(existing, { title: '  GitHub Pro  ', notes: '  new notes  ' })
    expect(updated.title).toBe('GitHub Pro')
    expect(updated.notes).toBe('new notes')
  })

  it('should handle undefined fields (no-op)', () => {
    const existing = createEntry({
      title: 'GitHub',
      encryptedPassword: 'encrypted',
    })
    const updated = updateEntry(existing, { title: undefined })
    expect(updated.title).toBe('GitHub')
  })
})

describe('createGroup', () => {
  it('should create a group with name and color', () => {
    const group = createGroup('Work', '#ff0000')
    expect(group.id).toBeDefined()
    expect(group.name).toBe('Work')
    expect(group.color).toBe('#ff0000')
    expect(group.createdAt).toBeDefined()
  })

  it('should assign a random color when none provided', () => {
    const group = createGroup('Personal')
    expect(group.color).toMatch(/^#[0-9a-f]{6}$/)
  })

  it('should trim group name', () => {
    const group = createGroup('  Work  ')
    expect(group.name).toBe('Work')
  })
})

describe('validateEntry', () => {
  it('should pass with valid data', () => {
    const result = validateEntry({ title: 'GitHub', encryptedPassword: 'encrypted' })
    expect(result.valid).toBe(true)
    expect(result.errors).toEqual([])
  })

  it('should fail with empty title', () => {
    const result = validateEntry({ title: '', encryptedPassword: 'encrypted' })
    expect(result.valid).toBe(false)
    expect(result.errors).toContain('Title is required')
  })

  it('should fail with whitespace-only title', () => {
    const result = validateEntry({ title: '   ', encryptedPassword: 'encrypted' })
    expect(result.valid).toBe(false)
    expect(result.errors).toContain('Title is required')
  })

  it('should fail with missing encryptedPassword', () => {
    const result = validateEntry({ title: 'GitHub' })
    expect(result.valid).toBe(false)
    expect(result.errors).toContain('Password is required')
  })

  it('should report multiple errors', () => {
    const result = validateEntry({ title: '' })
    expect(result.valid).toBe(false)
    expect(result.errors.length).toBe(2)
  })
})

describe('validateGroup', () => {
  it('should pass with valid name', () => {
    const result = validateGroup('Work')
    expect(result.valid).toBe(true)
    expect(result.errors).toEqual([])
  })

  it('should fail with empty name', () => {
    const result = validateGroup('')
    expect(result.valid).toBe(false)
    expect(result.errors).toContain('Group name is required')
  })

  it('should fail with whitespace-only name', () => {
    const result = validateGroup('   ')
    expect(result.valid).toBe(false)
    expect(result.errors).toContain('Group name is required')
  })

  it('should fail with name over 50 characters', () => {
    const result = validateGroup('a'.repeat(51))
    expect(result.valid).toBe(false)
    expect(result.errors).toContain('Group name must be 50 characters or less')
  })

  it('should pass with exactly 50 characters', () => {
    const result = validateGroup('a'.repeat(50))
    expect(result.valid).toBe(true)
  })
})

describe('createTrashGroup', () => {
  it('should return a group with fixed trash ID', () => {
    const group = createTrashGroup()
    expect(group.id).toBe(TRASH_GROUP_ID)
    expect(group.name).toBe(TRASH_GROUP_NAME)
    expect(group.color).toBe(TRASH_GROUP_COLOR)
    expect(group.createdAt).toBeDefined()
  })
})

describe('isTrashGroup', () => {
  it('should return true for trash group ID', () => {
    expect(isTrashGroup(TRASH_GROUP_ID)).toBe(true)
  })

  it('should return false for other IDs', () => {
    expect(isTrashGroup('group-123')).toBe(false)
    expect(isTrashGroup('')).toBe(false)
    expect(isTrashGroup('__trash')).toBe(false)
    expect(isTrashGroup('__trash__extra')).toBe(false)
  })
})