package role

import (
	"context"

	authHelper "perms-system-server/internal/logic/auth"
	"perms-system-server/internal/response"
	"perms-system-server/internal/svc"
	"perms-system-server/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

type DeleteRoleLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewDeleteRoleLogic(ctx context.Context, svcCtx *svc.ServiceContext) *DeleteRoleLogic {
	return &DeleteRoleLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// DeleteRole 删除角色。在事务内同时清理角色-权限和用户-角色绑定关系后删除角色，并批量清理受影响用户的权限缓存。
func (l *DeleteRoleLogic) DeleteRole(req *types.DeleteRoleReq) error {
	role, err := l.svcCtx.SysRoleModel.FindOne(l.ctx, req.Id)
	if err != nil {
		return response.ErrNotFound("角色不存在")
	}

	if err := authHelper.RequireProductAdminFor(l.ctx, role.ProductCode); err != nil {
		return err
	}

	var affectedUserIds []int64
	if err := l.svcCtx.SysRoleModel.TransactCtx(l.ctx, func(ctx context.Context, session sqlx.Session) error {
		var err error
		affectedUserIds, err = l.svcCtx.SysUserRoleModel.FindUserIdsByRoleIdForUpdateTx(ctx, session, req.Id)
		if err != nil {
			return err
		}
		if err := l.svcCtx.SysRolePermModel.DeleteByRoleIdTx(ctx, session, req.Id); err != nil {
			return err
		}
		if err := l.svcCtx.SysUserRoleModel.DeleteByRoleIdTx(ctx, session, req.Id); err != nil {
			return err
		}
		return l.svcCtx.SysRoleModel.DeleteWithTx(ctx, session, req.Id)
	}); err != nil {
		return err
	}

	l.svcCtx.UserDetailsLoader.BatchDel(l.ctx, affectedUserIds, role.ProductCode)
	return nil
}