package admin

import (
	"github.com/goravel/framework/contracts/http"

	apperrors "goravel/app/errors"
	"goravel/app/http/helpers"
	adminrequests "goravel/app/http/requests/admin"
	"goravel/app/http/response"
	"goravel/app/models"
	"goravel/app/services"
)

type DepartmentController struct {
	treeService       services.TreeService
	departmentService services.DepartmentService
}

func NewDepartmentController() *DepartmentController {
	treeService := services.NewTreeServiceImpl()
	return &DepartmentController{
		treeService:       treeService,
		departmentService: services.NewDepartmentServiceImpl(treeService),
	}
}

// findDepartmentByID 根据ID查找部门，如果不存在则返回错误响应
func (r *DepartmentController) findDepartmentByID(ctx http.Context, id uint) (*models.Department, http.Response) {
	department, err := r.departmentService.GetByID(id)
	if err != nil {
		return nil, response.Error(ctx, http.StatusNotFound, apperrors.ErrDepartmentNotFound.Code)
	}
	return department, nil
}

// buildFilters 构建查询过滤器
func (r *DepartmentController) buildFilters(ctx http.Context) services.DepartmentFilters {
	name := ctx.Request().Query("name", "")
	status := ctx.Request().Query("status", "")
	// 使用辅助函数自动转换时区
	startTime := helpers.GetTimeQueryParam(ctx, "start_time")
	endTime := helpers.GetTimeQueryParam(ctx, "end_time")
	orderBy := ctx.Request().Query("order_by", "")

	return services.DepartmentFilters{
		Name:      name,
		Status:    status,
		StartTime: startTime,
		EndTime:   endTime,
		OrderBy:   orderBy,
	}
}

// Index 部门列表（树形结构）
func (r *DepartmentController) Index(ctx http.Context) http.Response {
	name := ctx.Request().Query("name", "")
	status := ctx.Request().Query("status", "")
	// 使用辅助函数自动转换时区
	startTime := helpers.GetTimeQueryParam(ctx, "start_time")
	endTime := helpers.GetTimeQueryParam(ctx, "end_time")

	// 如果有搜索条件，返回扁平列表；否则返回树形结构
	if name != "" || status != "" || startTime != "" || endTime != "" {
		filters := r.buildFilters(ctx)
		// 搜索时获取所有匹配的记录，不限制分页
		departments, _, err := r.departmentService.GetList(filters, 1, 10000)
		if err != nil {
			return response.Error(ctx, http.StatusInternalServerError, apperrors.ErrQueryFailed.Code)
		}

		return response.Success(ctx, http.Json{
			"list": departments,
		})
	}

	// 无搜索条件时返回树形结构
	departments, err := r.treeService.BuildDepartmentTree(0)
	if err != nil {
		return response.Error(ctx, http.StatusInternalServerError, apperrors.ErrQueryFailed.Code)
	}

	return response.Success(ctx, http.Json{
		"list": departments,
	})
}

// Show 部门详情
func (r *DepartmentController) Show(ctx http.Context) http.Response {
	id := helpers.GetUintRoute(ctx, "id")
	department, resp := r.findDepartmentByID(ctx, id)
	if resp != nil {
		return resp
	}

	return response.Success(ctx, http.Json{
		"department": *department,
	})
}

// Store 创建部门
func (r *DepartmentController) Store(ctx http.Context) http.Response {
	// 使用请求验证
	var departmentCreate adminrequests.DepartmentCreate
	errors, err := ctx.Request().ValidateRequest(&departmentCreate)
	if err != nil {
		return response.Error(ctx, http.StatusBadRequest, err.Error())
	}
	if errors != nil {
		return response.ValidationError(ctx, http.StatusBadRequest, "validation_failed", errors.All())
	}

	department, err := r.departmentService.Create(
		departmentCreate.ParentID,
		departmentCreate.Name,
		departmentCreate.Code,
		departmentCreate.Leader,
		departmentCreate.Phone,
		departmentCreate.Email,
		departmentCreate.Remark,
		departmentCreate.Status,
		departmentCreate.Sort,
	)
	if err != nil {
		return response.ErrorWithLog(ctx, "department", err, map[string]any{
			"name": departmentCreate.Name,
		})
	}

	return response.Success(ctx, http.Json{
		"department": department,
	})
}

// Update 更新部门
func (r *DepartmentController) Update(ctx http.Context) http.Response {
	id := helpers.GetUintRoute(ctx, "id")
	department, resp := r.findDepartmentByID(ctx, id)
	if resp != nil {
		return resp
	}

	// 使用请求验证
	var departmentUpdate adminrequests.DepartmentUpdate
	errors, err := ctx.Request().ValidateRequest(&departmentUpdate)
	if err != nil {
		return response.Error(ctx, http.StatusBadRequest, err.Error())
	}
	if errors != nil {
		return response.ValidationError(ctx, http.StatusBadRequest, "validation_failed", errors.All())
	}

	// 使用 All() 方法检查字段是否存在
	allInputs := ctx.Request().All()

	if _, exists := allInputs["name"]; exists {
		department.Name = departmentUpdate.Name
	}
	if _, exists := allInputs["parent_id"]; exists {
		department.ParentID = departmentUpdate.ParentID
	}
	if _, exists := allInputs["code"]; exists {
		department.Code = departmentUpdate.Code
	}
	if _, exists := allInputs["leader"]; exists {
		department.Leader = departmentUpdate.Leader
	}
	if _, exists := allInputs["phone"]; exists {
		department.Phone = departmentUpdate.Phone
	}
	if _, exists := allInputs["email"]; exists {
		department.Email = departmentUpdate.Email
	}
	if _, exists := allInputs["status"]; exists {
		department.Status = departmentUpdate.Status
	}
	if _, exists := allInputs["sort"]; exists {
		department.Sort = departmentUpdate.Sort
	}
	if _, exists := allInputs["remark"]; exists {
		department.Remark = departmentUpdate.Remark
	}

	if err := r.departmentService.Update(department); err != nil {
		return response.ErrorWithLog(ctx, "department", err, map[string]any{
			"department_id": department.ID,
		})
	}

	return response.Success(ctx, http.Json{
		"department": *department,
	})
}

// Destroy 删除部门
func (r *DepartmentController) Destroy(ctx http.Context) http.Response {
	id := helpers.GetUintRoute(ctx, "id")
	department, resp := r.findDepartmentByID(ctx, id)
	if resp != nil {
		return resp
	}

	// 检查是否有子部门
	hasChildren, err := r.treeService.HasDepartmentChildren(id)
	if err != nil {
		return response.Error(ctx, http.StatusInternalServerError, apperrors.ErrQueryFailed.Code)
	}
	if hasChildren {
		return response.Error(ctx, http.StatusBadRequest, apperrors.ErrDepartmentHasChildren.Code)
	}

	// 检查是否有管理员
	hasAdmins, err := r.departmentService.HasAdmins(id)
	if err != nil {
		return response.Error(ctx, http.StatusInternalServerError, apperrors.ErrQueryFailed.Code)
	}
	if hasAdmins {
		return response.Error(ctx, http.StatusBadRequest, apperrors.ErrDepartmentHasAdmins.Code)
	}

	if err := r.departmentService.Delete(department); err != nil {
		return response.ErrorWithLog(ctx, "department", err, map[string]any{
			"department_id": department.ID,
		})
	}

	return response.Success(ctx)
}