package handler

import (
	"strconv"

	"with_you/internal/dto"
	"with_you/internal/model"
	"with_you/internal/pkg/response"
	"with_you/internal/service"

	"github.com/gin-gonic/gin"
)

// AdminUserHandler 管理端用户处理器
type AdminUserHandler struct {
	adminUserService service.AdminUserService
}

// NewAdminUserHandler 创建管理端用户处理器
func NewAdminUserHandler(adminUserService service.AdminUserService) *AdminUserHandler {
	return &AdminUserHandler{
		adminUserService: adminUserService,
	}
}

// GetUserList 获取用户列表
// GET /api/v1/admin/users
func (h *AdminUserHandler) GetUserList(c *gin.Context) {
	// 解析分页参数
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))

	if page <= 0 {
		page = 1
	}
	if pageSize <= 0 || pageSize > 100 {
		pageSize = 20
	}

	// 获取筛选参数
	keyword := c.Query("keyword")
	status := c.Query("status")

	// 验证状态参数
	if status != "" && status != string(model.UserStatusActive) && status != string(model.UserStatusBanned) {
		response.BadRequest(c, "invalid status value")
		return
	}

	users, total, err := h.adminUserService.GetUserList(c.Request.Context(), page, pageSize, keyword, status)
	if err != nil {
		response.InternalServerError(c, "failed to get user list")
		return
	}

	response.Paginated(c, users, total, page, pageSize)
}

// GetUserDetail 获取用户详情
// GET /api/v1/admin/users/:id
func (h *AdminUserHandler) GetUserDetail(c *gin.Context) {
	userID := c.Param("id")
	if userID == "" {
		response.BadRequest(c, "user id is required")
		return
	}

	userDetail, err := h.adminUserService.GetUserDetail(c.Request.Context(), userID)
	if err != nil {
		response.NotFound(c, "user not found")
		return
	}

	response.Success(c, userDetail)
}

// UpdateUserStatus 更新用户状态
// PUT /api/v1/admin/users/:id/status
func (h *AdminUserHandler) UpdateUserStatus(c *gin.Context) {
	userID := c.Param("id")
	if userID == "" {
		response.BadRequest(c, "user id is required")
		return
	}

	var req dto.AdminUpdateUserStatusRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.BadRequest(c, "invalid request body: "+err.Error())
		return
	}

	// 验证状态值
	if req.Status != string(model.UserStatusActive) && req.Status != string(model.UserStatusBanned) {
		response.BadRequest(c, "invalid status value, must be 'active' or 'banned'")
		return
	}

	userDetail, err := h.adminUserService.UpdateUserStatus(c.Request.Context(), userID, model.UserStatus(req.Status))
	if err != nil {
		response.HandleError(c, err, "failed to update user status")
		return
	}

	response.Success(c, userDetail)
}