import { describe, it, expect, vi, beforeEach } from 'vitest'
import { ref, reactive } from 'vue'

vi.mock('element-plus', () => ({
  ElMessage: {
    success: vi.fn(),
    error: vi.fn(),
    warning: vi.fn(),
    info: vi.fn(),
  },
}))

import { ElMessage } from 'element-plus'

describe('TaskForm.vue logic', () => {
  beforeEach(() => {
    vi.clearAllMocks()
  })

  describe('priorityOptions', () => {
    it('contains values 0-5', () => {
      const priorityOptions = [0, 1, 2, 3, 4, 5]
      expect(priorityOptions).toEqual([0, 1, 2, 3, 4, 5])
      expect(priorityOptions.length).toBe(6)
    })
  })

  describe('priority state management', () => {
    it('initializes with all zeros', () => {
      const priority = reactive({
        urgency: 0,
        importance: 0,
        contentDifficulty: 0,
        futureValue: 0,
        subjectivePriority: 0,
      })

      expect(priority.urgency).toBe(0)
      expect(priority.importance).toBe(0)
      expect(priority.contentDifficulty).toBe(0)
      expect(priority.futureValue).toBe(0)
      expect(priority.subjectivePriority).toBe(0)
    })

    it('updates individual priority fields', () => {
      const priority = reactive({
        urgency: 0,
        importance: 0,
        contentDifficulty: 0,
        futureValue: 0,
        subjectivePriority: 0,
      })

      priority.urgency = 3
      priority.importance = 5

      expect(priority.urgency).toBe(3)
      expect(priority.importance).toBe(5)
      expect(priority.contentDifficulty).toBe(0)
    })
  })

  describe('task payload construction', () => {
    it('builds correct create payload', () => {
      const taskName = ref('学习递归')
      const taskDescription = ref('理解递归的基本概念')
      const materialURL = ref('https://example.com/recursion')
      const priority = reactive({
        urgency: 3,
        importance: 4,
        contentDifficulty: 2,
        futureValue: 5,
        subjectivePriority: 3,
      })

      const payload = {
        taskName: taskName.value,
        taskDescription: taskDescription.value,
        materialURL: materialURL.value,
        ...priority,
      }

      expect(payload).toEqual({
        taskName: '学习递归',
        taskDescription: '理解递归的基本概念',
        materialURL: 'https://example.com/recursion',
        urgency: 3,
        importance: 4,
        contentDifficulty: 2,
        futureValue: 5,
        subjectivePriority: 3,
      })
    })

    it('builds correct update payload with id', () => {
      const taskId = 42
      const taskName = ref('更新后的任务')
      const taskDescription = ref('')
      const materialURL = ref('')
      const priority = reactive({
        urgency: 1,
        importance: 2,
        contentDifficulty: 0,
        futureValue: 3,
        subjectivePriority: 4,
      })

      const payload = {
        id: taskId,
        taskName: taskName.value,
        taskDescription: taskDescription.value,
        materialURL: materialURL.value,
        ...priority,
      }

      expect(payload.id).toBe(42)
      expect(payload.taskName).toBe('更新后的任务')
    })
  })

  describe('loadTask data mapping', () => {
    it('maps API response to form fields correctly', () => {
      const apiData = {
        taskName: '学习DP',
        taskDescription: '动态规划',
        materialUrl: 'https://example.com/dp',
        urgency: 4,
        importance: 5,
        contentDifficulty: 3,
        futureValue: 4,
        subjectivePriority: 2,
      }

      const taskName = ref('')
      const taskDescription = ref('')
      const materialURL = ref('')
      const priority = reactive({
        urgency: 0,
        importance: 0,
        contentDifficulty: 0,
        futureValue: 0,
        subjectivePriority: 0,
      })

      // Simulate loadTask mapping
      taskName.value = apiData.taskName
      taskDescription.value = apiData.taskDescription
      materialURL.value = apiData.materialURL || apiData.materialUrl || ''
      priority.urgency = apiData.urgency
      priority.importance = apiData.importance
      priority.contentDifficulty = apiData.contentDifficulty
      priority.futureValue = apiData.futureValue
      priority.subjectivePriority = apiData.subjectivePriority

      expect(taskName.value).toBe('学习DP')
      expect(materialURL.value).toBe('https://example.com/dp')
      expect(priority.urgency).toBe(4)
      expect(priority.importance).toBe(5)
    })

    it('handles materialURL with camelCase variant', () => {
      const apiData = { materialURL: 'https://example.com/a', materialUrl: 'https://example.com/b' }
      const result = apiData.materialURL || apiData.materialUrl || ''
      expect(result).toBe('https://example.com/a')
    })

    it('falls back to empty string when no material URL', () => {
      const apiData = {} as any
      const result = apiData.materialURL || apiData.materialUrl || ''
      expect(result).toBe('')
    })
  })

  describe('redirect after successful action', () => {
    it('navigates to study page after create/update', () => {
      const pushTarget = '/study'
      expect(pushTarget).toBe('/study')
    })
  })
})