/**
 * External-link interception policy tests: the pure decision (which http(s)
 * external links are taken over into the sidebar browser) and the click
 * shape (plain left clicks only — modified clicks always bypass).
 */
import { describe, expect, it } from 'vitest'
import { isPlainLeftClick, shouldInterceptLink } from '../src/client/link-intercept.ts'

const SELF = 'http://127.0.0.1:3080'

describe('shouldInterceptLink', () => {
  it('takes over http(s) external links', () => {
    expect(shouldInterceptLink('https://example.com/page?a=1', SELF)).toBe('https://example.com/page?a=1')
    expect(shouldInterceptLink('http://example.com/', SELF)).toBe('http://example.com/')
  })

  it('ignores non-http(s) links (mailto:, javascript:, file:)', () => {
    expect(shouldInterceptLink('mailto:a@b.c', SELF)).toBeNull()
    expect(shouldInterceptLink('javascript:void(0)', SELF)).toBeNull()
    expect(shouldInterceptLink('file:///tmp/x.html', SELF)).toBeNull()
  })

  it('ignores unparsable hrefs', () => {
    expect(shouldInterceptLink('not a url', SELF)).toBeNull()
  })

  it('never takes over same-origin (GUI-internal) links', () => {
    expect(shouldInterceptLink('http://127.0.0.1:3080/settings', SELF)).toBeNull()
    expect(shouldInterceptLink('http://127.0.0.1:3080/chat/session-x', SELF)).toBeNull()
    // A different port of the same host is external.
    expect(shouldInterceptLink('http://127.0.0.1:9999/', SELF)).toBe('http://127.0.0.1:9999/')
  })

  it("takes over LAN hosts (the browser's own blocklist, not the link policy)", () => {
    // The link takeover funnels into the sidebar browser, which then applies
    // its own loopback/self address-bar policy on render — the interception
    // itself must not silently drop links the browser will surface as blocked.
    expect(shouldInterceptLink('http://192.168.1.1/', SELF)).toBe('http://192.168.1.1/')
  })
})

describe('isPlainLeftClick', () => {
  const plain = { button: 0, metaKey: false, ctrlKey: false, shiftKey: false, altKey: false }

  it('accepts a plain left click', () => {
    expect(isPlainLeftClick(plain)).toBe(true)
  })

  it('bypasses modified clicks (Ctrl/Cmd/Shift/Alt) and non-left buttons', () => {
    expect(isPlainLeftClick({ ...plain, metaKey: true })).toBe(false)
    expect(isPlainLeftClick({ ...plain, ctrlKey: true })).toBe(false)
    expect(isPlainLeftClick({ ...plain, shiftKey: true })).toBe(false)
    expect(isPlainLeftClick({ ...plain, altKey: true })).toBe(false)
    expect(isPlainLeftClick({ ...plain, button: 1 })).toBe(false)
    expect(isPlainLeftClick({ ...plain, button: 2 })).toBe(false)
  })
})