package jwt

import (
	"context"
	"git.diulo.com/mogfee/kit/errors"
	"git.diulo.com/mogfee/kit/transport"
	"git.diulo.com/mogfee/kit/transport/http"
	"strings"
)

type JwtDefault struct {
}

func (j *JwtDefault) GetToken(ctx context.Context, key string) (tokenStr string) {
	arr := strings.Split(key, ":")
	if len(arr) != 2 {
		return ""
	}
	switch arr[0] {
	case "cookie":
		if tr, ok := transport.FromServerContext(ctx); ok {
			if tr1, ok := tr.(http.Transporter); ok {
				if co, err := tr1.Request().Cookie(arr[1]); err == nil {
					return co.Value
				}
			}
		}
	case "header":
		if tr, ok := transport.FromServerContext(ctx); ok {
			return tr.RequestHeader().Get(arr[1])
		}
	case "query":
		if tr, ok := transport.FromServerContext(ctx); ok {
			if ht, ok := tr.(http.Transporter); ok {
				return ht.Request().URL.Query().Get(arr[1])
			}
		}
	}
	return ""
}

func (j *JwtDefault) ParseToken(ctx context.Context, key string, token string) (*UserInfo, error) {
	return Parse(key, token)
}

func (j *JwtDefault) Validate(ctx context.Context, permission string, permissions []string) error {
	allowPers := strings.Split(permission, "|")
	allowMap := make(map[string]bool, len(allowPers))
	for _, v := range allowPers {
		allowMap[v] = true
	}
	for _, v := range permissions {
		if allowMap[v] {
			return nil
		}
	}
	return errors.Forbidden("TOKEN_PERMISSION_BAD", "权限不足")
}