package services

import (
	"errors"
	"go.uber.org/zap"
	"goalfymax-admin/internal/models"
	"goalfymax-admin/internal/storage"
	"goalfymax-admin/pkg/utils"
)

// RBACService 简化的RBAC服务接口
type RBACService interface {
	// 角色页面权限管理
	AssignRolePagePermissions(req *models.RolePagePermissionAssignRequest) error
	RemoveRolePagePermissions(roleID uint, pageIDs []uint) error
	GetRolePagePermissions(roleID uint) ([]models.Page, error)
	GetRolePagePermissionIDs(roleID uint) ([]uint, error)

	// 页面权限检查
	CheckUserPagePermission(userID uint, pagePath string) (bool, error)
	GetUserAccessiblePages(userID uint) ([]string, error)
	GetUserPermissionsResponse(userID uint) (*models.UserPermissionsResponse, error)
	GetRolePagePermissionsResponse(roleID uint) (*models.RolePagePermissionsResponse, error)

	// 角色管理
	GetRoleByID(roleID uint) (*models.Role, error)
}

type rbacService struct {
	rbacStorage storage.RBACStorage
	userStorage storage.UserStorage
	logger      *utils.Logger
}

// NewRBACService 创建RBAC服务实例
func NewRBACService(rbacStorage storage.RBACStorage, userStorage storage.UserStorage, logger *utils.Logger) RBACService {
	return &rbacService{
		rbacStorage: rbacStorage,
		userStorage: userStorage,
		logger:      logger,
	}
}

// AssignRolePagePermissions 分配角色页面权限
func (s *rbacService) AssignRolePagePermissions(req *models.RolePagePermissionAssignRequest) error {
	err := s.rbacStorage.AssignRolePagePermissions(req.RoleID, req.PageIDs)
	if err != nil {
		s.logger.Error("分配角色页面权限失败", zap.Uint("roleID", req.RoleID), zap.Uints("pageIDs", req.PageIDs), zap.Error(err))
		return errors.New("分配角色页面权限失败")
	}

	s.logger.Info("分配角色页面权限成功", zap.Uint("roleID", req.RoleID), zap.Uints("pageIDs", req.PageIDs))
	return nil
}

// RemoveRolePagePermissions 移除角色页面权限
func (s *rbacService) RemoveRolePagePermissions(roleID uint, pageIDs []uint) error {
	err := s.rbacStorage.RemoveRolePagePermissions(roleID, pageIDs)
	if err != nil {
		s.logger.Error("移除角色页面权限失败", zap.Uint("roleID", roleID), zap.Uints("pageIDs", pageIDs), zap.Error(err))
		return errors.New("移除角色页面权限失败")
	}

	s.logger.Info("移除角色页面权限成功", zap.Uint("roleID", roleID), zap.Uints("pageIDs", pageIDs))
	return nil
}

// GetRolePagePermissions 获取角色页面权限
func (s *rbacService) GetRolePagePermissions(roleID uint) ([]models.Page, error) {
	pages, err := s.rbacStorage.GetRolePagePermissions(roleID)
	if err != nil {
		s.logger.Error("获取角色页面权限失败", zap.Uint("roleID", roleID), zap.Error(err))
		return nil, errors.New("获取角色页面权限失败")
	}
	return pages, nil
}

// GetRolePagePermissionIDs 获取角色页面权限ID列表
func (s *rbacService) GetRolePagePermissionIDs(roleID uint) ([]uint, error) {
	pageIDs, err := s.rbacStorage.GetRolePagePermissionIDs(roleID)
	if err != nil {
		s.logger.Error("获取角色页面权限ID失败", zap.Uint("roleID", roleID), zap.Error(err))
		return nil, errors.New("获取角色页面权限ID失败")
	}
	return pageIDs, nil
}

// CheckUserPagePermission 检查用户页面权限
func (s *rbacService) CheckUserPagePermission(userID uint, pagePath string) (bool, error) {
	hasPermission, err := s.rbacStorage.CheckUserRolePagePermission(userID, pagePath)
	if err != nil {
		s.logger.Error("检查用户页面权限失败", zap.Uint("userID", userID), zap.String("pagePath", pagePath), zap.Error(err))
		return false, errors.New("检查用户页面权限失败")
	}
	return hasPermission, nil
}

// GetUserAccessiblePages 获取用户可访问页面
func (s *rbacService) GetUserAccessiblePages(userID uint) ([]string, error) {
	pages, err := s.rbacStorage.GetUserRoleAccessiblePages(userID)
	if err != nil {
		s.logger.Error("获取用户可访问页面失败", zap.Uint("userID", userID), zap.Error(err))
		return nil, errors.New("获取用户可访问页面失败")
	}
	return pages, nil
}

// GetUserPermissionsResponse 获取用户权限响应
func (s *rbacService) GetUserPermissionsResponse(userID uint) (*models.UserPermissionsResponse, error) {
	// 获取用户信息
	user, err := s.userStorage.GetByID(userID)
	if err != nil {
		s.logger.Error("获取用户信息失败", zap.Uint("userID", userID), zap.Error(err))
		return nil, errors.New("获取用户信息失败")
	}

	// 查询角色信息
	role, err := s.rbacStorage.GetRoleByID(user.RoleID)
	if err != nil {
		s.logger.Error("获取角色信息失败", zap.Uint("roleID", user.RoleID), zap.Error(err))
		return nil, errors.New("获取角色信息失败")
	}

	// 获取用户可访问页面
	pagePaths, err := s.GetUserAccessiblePages(userID)
	if err != nil {
		s.logger.Error("获取用户可访问页面失败", zap.Uint("userID", userID), zap.Error(err))
		return nil, errors.New("获取用户可访问页面失败")
	}

	// 转换页面路径为页面对象
	var pages []models.Page
	for _, path := range pagePaths {
		pages = append(pages, models.Page{Path: path})
	}

	return &models.UserPermissionsResponse{
		User:  *user,
		Roles: []models.Role{*role},
		Pages: pages,
	}, nil
}

// GetRolePagePermissionsResponse 获取角色页面权限响应
func (s *rbacService) GetRolePagePermissionsResponse(roleID uint) (*models.RolePagePermissionsResponse, error) {
	// 获取角色信息（这里需要从角色存储中获取，暂时简化）
	role := models.Role{BaseModel: models.BaseModel{ID: roleID}}

	// 获取角色页面权限
	pages, err := s.GetRolePagePermissions(roleID)
	if err != nil {
		s.logger.Error("获取角色页面权限失败", zap.Uint("roleID", roleID), zap.Error(err))
		return nil, errors.New("获取角色页面权限失败")
	}

	return &models.RolePagePermissionsResponse{
		Role:  role,
		Pages: pages,
	}, nil
}

// GetRoleByID 根据ID获取角色
func (s *rbacService) GetRoleByID(roleID uint) (*models.Role, error) {
	return s.rbacStorage.GetRoleByID(roleID)
}