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"
)

// MockPlanRepository 是 repository.PlanRepository 的一个模拟实现，用于测试
type MockPlanRepository struct {
	CreatePlanFunc func(plan *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) {
	panic("implement me")
}

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, *Controller) {
	gin.SetMode(gin.TestMode)
	router := gin.Default()
	planController := NewController(logs.NewSilentLogger(), repo)
	router.POST("/plans", planController.CreatePlan)
	return router, planController
}

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 {
				// 模拟 GORM 回填 ID
				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)

		// 验证 Data 部分
		dataMap, ok := resp.Data.(map[string]interface{})
		assert.True(t, ok)
		assert.Equal(t, float64(1), dataMap["id"])
		assert.Equal(t, "Test Plan with Tasks", dataMap["name"])
		tasks, ok := dataMap["tasks"].([]interface{})
		assert.True(t, ok)
		assert.Len(t, tasks, 1)
	})

	t.Run("失败-无效的请求体", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{}
		router, _ := setupTestRouter(mockRepo)

		req, _ := http.NewRequest(http.MethodPost, "/plans", bytes.NewBufferString("{invalid json"))
		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.CodeBadRequest, resp.Code)
		assert.Contains(t, resp.Message, "无效的请求体")
	})

	t.Run("失败-转换器业务校验失败", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{}
		router, _ := setupTestRouter(mockRepo)

		// 创建一个带有重复执行顺序的请求，这将导致 PlanFromCreateRequest 返回错误
		reqBody := CreatePlanRequest{
			Name:          "Duplicate Order Plan",
			ExecutionType: models.PlanExecutionTypeManual,
			ContentType:   models.PlanContentTypeTasks,
			Tasks: []TaskRequest{
				{Name: "Task 1", ExecutionOrder: 1},
				{Name: "Task 2", ExecutionOrder: 1}, // 重复
			},
		}
		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.CodeBadRequest, resp.Code)
		assert.Contains(t, resp.Message, "计划数据校验失败")
		assert.Contains(t, resp.Message, "任务执行顺序重复")
	})

	t.Run("失败-仓库层业务错误", func(t *testing.T) {
		// Arrange
		mockRepo := &MockPlanRepository{
			CreatePlanFunc: func(plan *models.Plan) error {
				return repository.ErrNodeDoesNotExist // 模拟仓库层返回的业务错误
			},
		}
		router, _ := setupTestRouter(mockRepo)

		reqBody := CreatePlanRequest{
			Name:          "Plan with non-existent sub-plan",
			ExecutionType: models.PlanExecutionTypeManual,
			ContentType:   models.PlanContentTypeSubPlans,
			SubPlanIDs:    []uint{999}, // 假设这个ID不存在
		}
		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.CodeBadRequest, resp.Code)
		assert.Equal(t, "创建计划失败: "+repository.ErrNodeDoesNotExist.Error(), 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{
			CreatePlanFunc: func(plan *models.Plan) error {
				return internalErr // 模拟一个未知的内部错误
			},
		}
		router, _ := setupTestRouter(mockRepo)

		reqBody := CreatePlanRequest{
			Name:          "Test Plan",
			ExecutionType: models.PlanExecutionTypeManual,
			ContentType:   models.PlanContentTypeTasks,
			Tasks:         []TaskRequest{},
		}
		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.CodeBadRequest, resp.Code)
		assert.Equal(t, "创建计划失败: "+internalErr.Error(), resp.Message)
	})
}