package apis

import (
	"context"
	"net/http"
	"path/filepath"
	"strings"

	"github.com/go-chi/chi/v5/middleware"
	"github.com/go-chi/render"
	"github.com/google/uuid"

	"git.ifooth.com/common/pkg/apis/rest"
	"git.ifooth.com/common/pkg/components"
)

// RequestIdGenerator request_id
func RequestIdGenerator() string {
	uid := uuid.New().String()
	requestId := strings.Replace(uid, "-", "", -1)
	return requestId
}

// RequestID reuqest_id
func RequestID(next http.Handler) http.Handler {
	fn := func(w http.ResponseWriter, r *http.Request) {
		ctx := r.Context()
		requestID := r.Header.Get(components.RequestIDHeaderKey)
		if requestID == "" {
			requestID = RequestIdGenerator()
		}

		ctx = components.WithRequestIDValue(ctx, requestID)
		ctx = context.WithValue(ctx, middleware.RequestIDKey, requestID)

		w.Header().Set(components.RequestIDHeaderKey, requestID)
		next.ServeHTTP(w, r.WithContext(ctx))
	}
	return http.HandlerFunc(fn)
}

// AuthRequired API类型, 兼容多种鉴权模式
func AuthRequired(next http.Handler) http.Handler {
	ignoreExtMap := map[string]struct{}{
		".js":  {},
		".css": {},
		".map": {},
		".png": {},
	}

	fn := func(w http.ResponseWriter, r *http.Request) {
		if r.Method == http.MethodOptions {
			next.ServeHTTP(w, r)
			return
		}

		// 静态资源过滤, 注意不会带鉴权信息
		fileExt := filepath.Ext(r.URL.Path)
		if _, ok := ignoreExtMap[fileExt]; ok {
			next.ServeHTTP(w, r)
			return
		}

		switch {
		default:
			render.Render(w, r, rest.AbortWithUnauthorizedError(rest.UnauthorizedError))
			return
		}

		next.ServeHTTP(w, r)
	}
	return http.HandlerFunc(fn)
}