/**
 * Terminal font resolution tests: the custom font prefs (side card settings,
 * terminal card) resolve into xterm options with a strict fallback chain —
 * user family > theme code font > the built-in monospace stack, and the size
 * clamped into the 9–32 contract.
 */
import { describe, expect, it } from 'vitest'
import { SIDEBAR_PREFS_DEFAULTS, clampTerminalFontSize, TERMINAL_FONT_SIZE_MAX, TERMINAL_FONT_SIZE_MIN } from '../src/prefs-shared.ts'
import { DEFAULT_TERMINAL_FONT_FAMILY, resolveTerminalFont } from '../src/client/terminal-font.ts'

describe('clampTerminalFontSize', () => {
  it('rounds and clamps into the 9–32 contract', () => {
    expect(clampTerminalFontSize(13)).toBe(13)
    expect(clampTerminalFontSize(15.6)).toBe(16)
    expect(clampTerminalFontSize(5)).toBe(TERMINAL_FONT_SIZE_MIN)
    expect(clampTerminalFontSize(40)).toBe(TERMINAL_FONT_SIZE_MAX)
  })
})

describe('resolveTerminalFont', () => {
  it('falls back to the theme code font when the family pref is empty', () => {
    const { fontFamily, fontSize } = resolveTerminalFont(SIDEBAR_PREFS_DEFAULTS, 'var-theme-font')
    expect(fontFamily).toBe('var-theme-font')
    expect(fontSize).toBe(13)
  })

  it('falls back to the built-in monospace stack when neither the pref nor the theme provides one', () => {
    expect(resolveTerminalFont(SIDEBAR_PREFS_DEFAULTS, undefined).fontFamily).toBe(DEFAULT_TERMINAL_FONT_FAMILY)
    // A whitespace-only pref counts as empty (theme default).
    expect(resolveTerminalFont({ ...SIDEBAR_PREFS_DEFAULTS, terminalFontFamily: '   ' }, undefined).fontFamily)
      .toBe(DEFAULT_TERMINAL_FONT_FAMILY)
  })

  it('prefers the custom family verbatim and clamps the size', () => {
    const { fontFamily, fontSize } = resolveTerminalFont(
      { ...SIDEBAR_PREFS_DEFAULTS, terminalFontFamily: '"JetBrains Mono", monospace', terminalFontSize: 40 },
      'var-theme-font',
    )
    expect(fontFamily).toBe('"JetBrains Mono", monospace')
    expect(fontSize).toBe(TERMINAL_FONT_SIZE_MAX)
  })
})