package middleware

import (
	"strings"

	"kra/internal/biz"
	"kra/internal/conf"
	"kra/internal/server/httpx"
	"kra/internal/service"
	"kra/internal/service/dto"

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

func AccessControl(runtime *conf.Runtime, access *service.AccessService, audit *service.AuditService) gin.HandlerFunc {
	return func(c *gin.Context) {
		claims := Claims(c)
		if claims == nil {
			httpx.NoAuth(c, "未登录或非法访问")
			return
		}
		path := c.Request.URL.Path
		policyPath := path
		if config := runtime.Admin(); config != nil && config.RouterPrefix != "" {
			policyPath = strings.TrimPrefix(policyPath, strings.TrimSuffix(config.RouterPrefix, "/"))
			if policyPath == "" {
				policyPath = "/"
			}
		}
		allowed, err := access.Authorize(c.Request.Context(), claims.AuthorityID, policyPath, c.Request.Method)
		if err != nil || !allowed {
			requestID, _ := c.Get("request_id")
			requestIDText, _ := requestID.(string)
			_ = audit.RecordDataAccessRequest(c.Request.Context(), &dto.DataAccessRecordRequest{EventType: "blocked_access", Operation: c.Request.Method, UserID: claims.ID, AuthorityID: claims.AuthorityID, RequestID: requestIDText, Method: c.Request.Method, Path: path, Detail: "Casbin policy denied the request"})
			httpx.Write(c, httpx.CodeError, gin.H{}, "权限不足")
			c.Abort()
			return
		}
		requestContext, err := access.ContextWithDataScope(c.Request.Context(), claims.AuthorityID, claims.ID)
		if err != nil {
			requestContext = c.Request.Context()
		}
		if scope, ok := biz.DataScopeFromContext(requestContext); ok {
			requestID, _ := c.Get("request_id")
			scope.RequestID, _ = requestID.(string)
			scope.Method, scope.Path = c.Request.Method, path
			requestContext = biz.NewDataScopeContext(requestContext, scope)
		}
		requestContext = biz.NewActorContext(requestContext, biz.Actor{UserID: claims.ID, AuthorityID: claims.AuthorityID})
		c.Request = c.Request.WithContext(requestContext)
		c.Next()
	}
}