import { describe, it, expect, vi, beforeEach } from 'vitest'
import { mount } from '@vue/test-utils'
import { setActivePinia, createPinia } from 'pinia'

// Mock 面包屑组件的核心逻辑
describe('面包屑组件逻辑测试', () => {
    beforeEach(() => {
        setActivePinia(createPinia())
    })

    it('生成面包屑路径', () => {
        // 模拟面包屑路径生成逻辑
        const mockPath = '/platLayout/system/user'
        const mockMenuData = [
            {
                name: '系统管理',
                routerPath: '/platLayout/system',
                alias: 'system',
                children: [
                    {
                        name: '用户管理',
                        routerPath: '/platLayout/system/user',
                        alias: 'user'
                    }
                ]
            }
        ]

        // 模拟面包屑生成函数
        function generateBreadcrumb(path: string, menuData: any[]) {
            const breadcrumb = []
            const pathSegments = path.split('/').filter(Boolean)
            
            let currentMenu = menuData[0]
            breadcrumb.push({
                name: currentMenu.name,
                routerPath: currentMenu.routerPath,
                level: 1
            })

            if (currentMenu.children) {
                const childMenu = currentMenu.children.find(child => 
                    path.includes(child.routerPath)
                )
                if (childMenu) {
                    breadcrumb.push({
                        name: childMenu.name,
                        routerPath: childMenu.routerPath,
                        level: 2
                    })
                }
            }

            return breadcrumb
        }

        const result = generateBreadcrumb(mockPath, mockMenuData)
        
        expect(result).toHaveLength(2)
        expect(result[0].name).toBe('系统管理')
        expect(result[1].name).toBe('用户管理')
    })

    it('处理单页面路由', () => {
        const singlePageMeta = { singlePage: true, label: '个人中心' }
        
        function generateSinglePageBreadcrumb(meta: any) {
            if (meta.singlePage) {
                return [{
                    name: meta.label,
                    disabled: true
                }]
            }
            return []
        }

        const result = generateSinglePageBreadcrumb(singlePageMeta)
        
        expect(result).toHaveLength(1)
        expect(result[0].name).toBe('个人中心')
        expect(result[0].disabled).toBe(true)
    })

    it('判断面包屑项是否可点击', () => {
        const breadcrumbItems = [
            { name: '系统管理', disabled: false, level: 1 },
            { name: '用户管理', disabled: false, level: 2, isCurrentRoute: true }
        ]

        function isClickable(item: any, index: number, totalLength: number) {
            // 最后一项（当前路由）不可点击
            if (index === totalLength - 1) return false
            // 禁用项不可点击
            if (item.disabled) return false
            // 其他情况可点击
            return true
        }

        expect(isClickable(breadcrumbItems[0], 0, 2)).toBe(true)
        expect(isClickable(breadcrumbItems[1], 1, 2)).toBe(false)
    })

    it('处理面包屑隐藏逻辑', () => {
        function shouldHideBreadcrumb(breadcrumbLength: number, isCustomRouter: boolean, isHomePage: boolean) {
            return breadcrumbLength <= 1 && (isCustomRouter || isHomePage)
        }

        expect(shouldHideBreadcrumb(1, true, false)).toBe(true)
        expect(shouldHideBreadcrumb(1, false, true)).toBe(true)
        expect(shouldHideBreadcrumb(2, true, false)).toBe(false)
        expect(shouldHideBreadcrumb(1, false, false)).toBe(false)
    })

    it('处理目录点击事件', () => {
        const mockEmit = vi.fn()
        
        function handleBreadcrumbClick(item: any, index: number, totalLength: number, emit: any) {
            // 检查是否可点击
            if (index === totalLength - 1 || item.disabled) {
                return
            }

            if (item.isDirectory) {
                emit('directory-click', item)
            } else {
                // 模拟路由跳转
                console.log('Navigate to:', item.routerPath)
            }
        }

        const directoryItem = { name: '系统管理', isDirectory: true, routerPath: '/system' }
        handleBreadcrumbClick(directoryItem, 0, 2, mockEmit)
        
        expect(mockEmit).toHaveBeenCalledWith('directory-click', directoryItem)
    })
})