package plan

import (
	"bytes"
	"encoding/json"
	"errors"
	"net/http"
	"net/http/httptest"
	"testing"

	"git.huangwc.com/pig/pig-farm-controller/internal/app/controller"
	"git.huangwc.com/pig/pig-farm-controller/internal/infra/logs"
	"git.huangwc.com/pig/pig-farm-controller/internal/infra/models"
	"git.huangwc.com/pig/pig-farm-controller/internal/infra/repository"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"gorm.io/gorm"
)

// MockPlanRepository 是 repository.PlanRepository 的一个模拟实现，用于测试
// [保持原样，不做任何修改]
type MockPlanRepository struct {
	CreatePlanFunc  func(plan *models.Plan) error
	GetPlanByIDFunc func(id uint) (*models.Plan, error)
	// ... 可以根据需要模拟其他接口方法
}

func (m *MockPlanRepository) ListBasicPlans() ([]models.Plan, error) {
	panic("implement me")
}

func (m *MockPlanRepository) GetBasicPlanByID(id uint) (*models.Plan, error) {
	panic("implement me")
}

func (m *MockPlanRepository) GetPlanByID(id uint) (*models.Plan, error) {
	return m.GetPlanByIDFunc(id)
}

func (m *MockPlanRepository) CreatePlan(plan *models.Plan) error {
	if m.CreatePlanFunc != nil {
		return m.CreatePlanFunc(plan)
	}
	return nil
}

func (m *MockPlanRepository) UpdatePlan(plan *models.Plan) error {
	panic("implement me")
}

func (m *MockPlanRepository) DeletePlan(id uint) error {
	panic("implement me")
}

// setupTestRouter 创建一个用于测试的 gin 引擎和控制器实例
func setupTestRouter(repo repository.PlanRepository) *gin.Engine {
	gin.SetMode(gin.TestMode)
	router := gin.Default()
	logger := logs.NewSilentLogger()
	planController := NewController(logger, repo)
	router.POST("/plans", planController.CreatePlan)
	router.GET("/plans/:id", planController.GetPlan)
	return router
}

// TestController_CreatePlan [保持原样，不做任何修改]
func TestController_CreatePlan(t *testing.T) {
	t.Run("成功-创建包含任务的计划", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{
			CreatePlanFunc: func(plan *models.Plan) error {
				plan.ID = 1
				for i := range plan.Tasks {
					plan.Tasks[i].ID = uint(i + 1)
					plan.Tasks[i].PlanID = plan.ID
				}
				return nil
			},
		}
		router := setupTestRouter(mockRepo)

		reqBody := CreatePlanRequest{
			Name:          "Test Plan with Tasks",
			ExecutionType: models.PlanExecutionTypeManual,
			ContentType:   models.PlanContentTypeTasks,
			Tasks: []TaskRequest{
				{Name: "Task 1", ExecutionOrder: 1, Type: models.TaskTypeWaiting},
			},
		}
		bodyBytes, _ := json.Marshal(reqBody)

		req, _ := http.NewRequest(http.MethodPost, "/plans", bytes.NewBuffer(bodyBytes))
		req.Header.Set("Content-Type", "application/json")
		w := httptest.NewRecorder()

		// Act
		router.ServeHTTP(w, req)

		// Assert
		assert.Equal(t, http.StatusOK, w.Code)

		var resp controller.Response
		err := json.Unmarshal(w.Body.Bytes(), &resp)
		assert.NoError(t, err)

		assert.Equal(t, controller.CodeCreated, resp.Code)
		assert.Equal(t, "计划创建成功", resp.Message)

		dataMap, ok := resp.Data.(map[string]interface{})
		assert.True(t, ok)
		assert.Equal(t, float64(1), dataMap["id"])
	})
}

// TestController_GetPlan 是为 GetPlan 方法新增的单元测试函数
func TestController_GetPlan(t *testing.T) {
	t.Run("成功-获取计划详情", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{
			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
				assert.Equal(t, uint(1), id)
				return &models.Plan{
					Model:       gorm.Model{ID: 1},
					Name:        "Test Plan",
					ContentType: models.PlanContentTypeTasks,
				}, nil
			},
		}
		router := setupTestRouter(mockRepo)
		w := httptest.NewRecorder()
		req, _ := http.NewRequest(http.MethodGet, "/plans/1", nil)

		// Act
		router.ServeHTTP(w, req)

		// Assert
		assert.Equal(t, http.StatusOK, w.Code)

		var resp controller.Response
		err := json.Unmarshal(w.Body.Bytes(), &resp)
		assert.NoError(t, err)

		assert.Equal(t, controller.CodeSuccess, resp.Code)
		dataMap, ok := resp.Data.(map[string]interface{})
		assert.True(t, ok)
		assert.Equal(t, float64(1), dataMap["id"])
	})

	t.Run("成功-获取内容为空的计划详情", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{
			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
				assert.Equal(t, uint(3), id)
				return &models.Plan{
					Model:       gorm.Model{ID: 3},
					Name:        "Empty Plan",
					ContentType: models.PlanContentTypeTasks,
					Tasks:       []models.Task{}, // 任务列表为空
				}, nil
			},
		}
		router := setupTestRouter(mockRepo)
		w := httptest.NewRecorder()
		req, _ := http.NewRequest(http.MethodGet, "/plans/3", nil)

		// Act
		router.ServeHTTP(w, req)

		// Assert
		assert.Equal(t, http.StatusOK, w.Code)

		var resp controller.Response
		err := json.Unmarshal(w.Body.Bytes(), &resp)
		assert.NoError(t, err)

		assert.Equal(t, controller.CodeSuccess, resp.Code)

		dataMap, ok := resp.Data.(map[string]interface{})
		assert.True(t, ok)
		assert.Equal(t, float64(3), dataMap["id"])
		assert.Equal(t, "Empty Plan", dataMap["name"])

		// 关键断言：因为 omitempty 标签，当 tasks 列表为空时，该字段不应该出现在JSON中
		_, ok = dataMap["tasks"]
		assert.False(t, ok, "当任务列表为空时，'tasks' 字段因为 omitempty 标签，不应该出现在JSON响应中")
	})

	t.Run("失败-计划不存在", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{
			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
				return nil, gorm.ErrRecordNotFound
			},
		}
		router := setupTestRouter(mockRepo)
		w := httptest.NewRecorder()
		req, _ := http.NewRequest(http.MethodGet, "/plans/999", nil)

		// Act
		router.ServeHTTP(w, req)

		// Assert
		assert.Equal(t, http.StatusOK, w.Code)

		var resp controller.Response
		err := json.Unmarshal(w.Body.Bytes(), &resp)
		assert.NoError(t, err)

		assert.Equal(t, controller.CodeNotFound, resp.Code)
		assert.Equal(t, "计划不存在", resp.Message)
	})

	t.Run("失败-无效的ID格式", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{}
		router := setupTestRouter(mockRepo)
		w := httptest.NewRecorder()
		req, _ := http.NewRequest(http.MethodGet, "/plans/abc", nil)

		// Act
		router.ServeHTTP(w, req)

		// Assert
		assert.Equal(t, http.StatusOK, w.Code)

		var resp controller.Response
		err := json.Unmarshal(w.Body.Bytes(), &resp)
		assert.NoError(t, err)

		assert.Equal(t, controller.CodeBadRequest, resp.Code)
		assert.Equal(t, "无效的计划ID格式", resp.Message)
	})

	t.Run("失败-仓库层内部错误", func(t *testing.T) {
		// Arrange
		internalErr := errors.New("database connection lost")
		mockRepo := &MockPlanRepository{
			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
				return nil, internalErr
			},
		}
		router := setupTestRouter(mockRepo)
		w := httptest.NewRecorder()
		req, _ := http.NewRequest(http.MethodGet, "/plans/1", nil)

		// Act
		router.ServeHTTP(w, req)

		// Assert
		assert.Equal(t, http.StatusOK, w.Code)

		var resp controller.Response
		err := json.Unmarshal(w.Body.Bytes(), &resp)
		assert.NoError(t, err)

		assert.Equal(t, controller.CodeInternalError, resp.Code)
		assert.Equal(t, "获取计划详情时发生内部错误", resp.Message)
	})
}