package controller

import (
	"net/http"
	"strconv"

	"gofaster/internal/auth/model"
	"gofaster/internal/auth/service"
	"gofaster/internal/shared/response"

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

type RoleController struct {
	roleService *service.RoleService
}

func NewRoleController(roleService *service.RoleService) *RoleController {
	return &RoleController{
		roleService: roleService,
	}
}

// CreateRole 创建角色
// @Summary 创建角色
// @Description 创建新的角色
// @Tags 角色管理
// @Accept json
// @Produce json
// @Param role body model.Role true "角色信息"
// @Success 200 {object} response.Response{data=model.Role} "创建成功"
// @Failure 400 {object} response.Response "请求参数错误"
// @Failure 500 {object} response.Response "服务器内部错误"
// @Security BearerAuth
// @Router /auth/roles [post]
func (c *RoleController) CreateRole(ctx *gin.Context) {
	var role model.Role
	if err := ctx.ShouldBindJSON(&role); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	if err := c.roleService.CreateRole(ctx.Request.Context(), &role); err != nil {
		response.Error(ctx, http.StatusInternalServerError, "创建角色失败", err.Error())
		return
	}

	response.Success(ctx, "角色创建成功", role)
}

// UpdateRole 更新角色
// @Summary 更新角色
// @Description 根据ID更新角色信息
// @Tags 角色管理
// @Accept json
// @Produce json
// @Param id path int true "角色ID"
// @Param role body model.Role true "角色信息"
// @Success 200 {object} response.Response{data=model.Role} "更新成功"
// @Failure 400 {object} response.Response "请求参数错误"
// @Failure 500 {object} response.Response "服务器内部错误"
// @Security BearerAuth
// @Router /auth/roles/{id} [put]
func (c *RoleController) UpdateRole(ctx *gin.Context) {
	idStr := ctx.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", "无效的角色ID")
		return
	}

	var role model.Role
	if err := ctx.ShouldBindJSON(&role); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	role.ID = uint(id)

	if err := c.roleService.UpdateRole(ctx.Request.Context(), &role); err != nil {
		response.Error(ctx, http.StatusInternalServerError, "更新角色失败", err.Error())
		return
	}

	response.Success(ctx, "角色更新成功", role)
}

// DeleteRole 删除角色
// @Summary 删除角色
// @Description 根据ID删除角色
// @Tags 角色管理
// @Accept json
// @Produce json
// @Param id path int true "角色ID"
// @Success 200 {object} response.Response "删除成功"
// @Failure 400 {object} response.Response "请求参数错误"
// @Failure 500 {object} response.Response "服务器内部错误"
// @Security BearerAuth
// @Router /auth/roles/{id} [delete]
func (c *RoleController) DeleteRole(ctx *gin.Context) {
	idStr := ctx.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", "无效的角色ID")
		return
	}

	if err := c.roleService.DeleteRole(ctx.Request.Context(), uint(id)); err != nil {
		response.Error(ctx, http.StatusInternalServerError, "删除角色失败", err.Error())
		return
	}

	response.Success(ctx, "角色删除成功", nil)
}

// GetRole 获取角色详情
// @Summary 获取角色详情
// @Description 根据ID获取角色详细信息
// @Tags 角色管理
// @Accept json
// @Produce json
// @Param id path int true "角色ID"
// @Success 200 {object} response.Response{data=model.Role} "获取成功"
// @Failure 400 {object} response.Response "请求参数错误"
// @Failure 404 {object} response.Response "角色不存在"
// @Security BearerAuth
// @Router /auth/roles/{id} [get]
func (c *RoleController) GetRole(ctx *gin.Context) {
	idStr := ctx.Param("id")
	id, err := strconv.ParseUint(idStr, 10, 32)
	if err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", "无效的角色ID")
		return
	}

	role, err := c.roleService.GetRole(ctx.Request.Context(), uint(id))
	if err != nil {
		response.Error(ctx, http.StatusNotFound, "角色不存在", err.Error())
		return
	}

	response.Success(ctx, "获取角色成功", role)
}

// ListRoles 获取角色列表
// @Summary 获取角色列表
// @Description 分页获取角色列表
// @Tags 角色管理
// @Accept json
// @Produce json
// @Param page query int false "页码" default(1)
// @Param pageSize query int false "每页数量" default(10)
// @Success 200 {object} response.Response{data=object{data=[]model.Role,page=int,size=int,total=int}} "获取成功"
// @Failure 500 {object} response.Response "服务器内部错误"
// @Security BearerAuth
// @Router /auth/roles [get]
func (c *RoleController) ListRoles(ctx *gin.Context) {
	pageStr := ctx.DefaultQuery("page", "1")
	pageSizeStr := ctx.DefaultQuery("pageSize", "10")

	page, err := strconv.Atoi(pageStr)
	if err != nil || page < 1 {
		page = 1
	}

	pageSize, err := strconv.Atoi(pageSizeStr)
	if err != nil || pageSize < 1 || pageSize > 100 {
		pageSize = 10
	}

	roles, total, err := c.roleService.ListRoles(ctx.Request.Context(), page, pageSize)
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "获取角色列表失败", err.Error())
		return
	}

	response.Success(ctx, "获取角色列表成功", gin.H{
		"data":  roles,
		"page":  page,
		"size":  pageSize,
		"total": total,
	})
}

// AssignRolesToUser 为用户分配角色
func (c *RoleController) AssignRolesToUser(ctx *gin.Context) {
	userIDStr := ctx.Param("userId")
	userID, err := strconv.ParseUint(userIDStr, 10, 32)
	if err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", "无效的用户ID")
		return
	}

	var request struct {
		RoleIDs []uint `json:"role_ids" binding:"required"`
	}

	if err := ctx.ShouldBindJSON(&request); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	if err := c.roleService.AssignRolesToUser(ctx.Request.Context(), uint(userID), request.RoleIDs); err != nil {
		response.Error(ctx, http.StatusInternalServerError, "分配角色失败", err.Error())
		return
	}

	response.Success(ctx, "角色分配成功", nil)
}

// GetUserRoles 获取用户的角色列表
func (c *RoleController) GetUserRoles(ctx *gin.Context) {
	userIDStr := ctx.Param("userId")
	userID, err := strconv.ParseUint(userIDStr, 10, 32)
	if err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", "无效的用户ID")
		return
	}

	roles, err := c.roleService.GetUserRoles(ctx.Request.Context(), uint(userID))
	if err != nil {
		response.Error(ctx, http.StatusInternalServerError, "获取用户角色失败", err.Error())
		return
	}

	response.Success(ctx, "获取用户角色成功", roles)
}

// RemoveRolesFromUser 从用户移除角色
func (c *RoleController) RemoveRolesFromUser(ctx *gin.Context) {
	userIDStr := ctx.Param("userId")
	userID, err := strconv.ParseUint(userIDStr, 10, 32)
	if err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", "无效的用户ID")
		return
	}

	var request struct {
		RoleIDs []uint `json:"role_ids" binding:"required"`
	}

	if err := ctx.ShouldBindJSON(&request); err != nil {
		response.Error(ctx, http.StatusBadRequest, "请求参数错误", err.Error())
		return
	}

	if err := c.roleService.RemoveRolesFromUser(ctx.Request.Context(), uint(userID), request.RoleIDs); err != nil {
		response.Error(ctx, http.StatusInternalServerError, "移除角色失败", err.Error())
		return
	}

	response.Success(ctx, "角色移除成功", nil)
}