describe('Authentication Flow', () => {
  it('redirects to login when session expired', () => {
    cy.visit('/', {
      onBeforeLoad(win) {
        win.localStorage.setItem('sp_login_expires', String(Date.now() - 1000))
      }
    })
    cy.get('.login-overlay').should('be.visible')
  })

  it('login form accepts Enter key', () => {
    cy.visit('/')
    cy.get('.login-input').type('123456{enter}')
    // Should attempt login (success or fail depends on backend)
    cy.wait(500)
  })

  it('valid login stores session and shows app', () => {
    cy.visit('/')
    cy.get('.login-input').type('123456')
    cy.get('.login-btn').click()
    // If default password matches, should show main app
    cy.get('header', { timeout: 5000 }).should('be.visible')
    cy.window().then(win => {
      expect(win.localStorage.getItem('sp_login_expires')).to.not.be.null
    })
  })

  it('logout clears session and shows login', () => {
    cy.visit('/', {
      onBeforeLoad(win) {
        win.localStorage.setItem('sp_login_expires', String(Date.now() + 86400000))
      }
    })
    cy.get('header').should('be.visible')
    cy.get('.header-menu-btn').click()
    cy.contains('退出登录').click()
    cy.get('.login-overlay').should('be.visible')
    cy.window().then(win => {
      expect(win.localStorage.getItem('sp_login_expires')).to.be.null
    })
  })

  it('session persists across page reloads', () => {
    cy.visit('/', {
      onBeforeLoad(win) {
        win.localStorage.setItem('sp_login_expires', String(Date.now() + 86400000))
      }
    })
    cy.get('header').should('be.visible')
    cy.reload()
    cy.get('header').should('be.visible')
    cy.get('.login-overlay').should('not.exist')
  })
})