package router

import (
	"net/http"
	"net/url"
	"strings"

	"chatapp3-golang/internal/service/hostcenter"

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

func registerHostCenterRoutes(engine *gin.Engine, service *hostcenter.Service) {
	if service == nil {
		return
	}

	group := engine.Group("/app/h5/host-center")
	group.GET("/policy", func(c *gin.Context) {
		token := strings.TrimSpace(queryValuePreservePlus(c.Request.URL.RawQuery, "token"))
		if token == "" {
			writeError(c, hostcenter.NewAppError(http.StatusUnauthorized, "missing_token", "token is required"))
			return
		}

		resp, err := service.GetAnchorPolicy(c.Request.Context(), hostcenter.AnchorPolicyRequest{
			Token:      token,
			PolicyType: c.Query("policyType"),
		})
		if err != nil {
			writeError(c, err)
			return
		}
		writeOK(c, resp)
	})
}

func queryValuePreservePlus(rawQuery, name string) string {
	for _, part := range strings.Split(rawQuery, "&") {
		if part == "" {
			continue
		}
		key, value, _ := strings.Cut(part, "=")
		decodedKey, err := url.QueryUnescape(key)
		if err != nil || decodedKey != name {
			continue
		}
		decodedValue, err := url.QueryUnescape(strings.ReplaceAll(value, "+", "%2B"))
		if err != nil {
			return value
		}
		return decodedValue
	}
	return ""
}