package supportchat

import (
	"embed"
	"net/http"

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

// assets contains the self-contained customer chat page served by the Agent Desk backend.
//
//go:embed assets/*
var assets embed.FS

// RegisterRoutes registers the H5 support chat page and its static assets.
func RegisterRoutes(router gin.IRouter) {
	router.GET("/support/chat", serveIndex)
	router.GET("/support/chat/", serveIndex)
	router.GET("/support/chat/chat.css", serveAsset("assets/chat.css", "text/css; charset=utf-8"))
	router.GET("/support/chat/chat.js", serveAsset("assets/chat.js", "application/javascript; charset=utf-8"))
	router.GET("/support/demo", serveDemo)
	router.GET("/support/demo/", serveDemo)
	router.GET("/support/demo/demo.css", serveAsset("assets/demo.css", "text/css; charset=utf-8"))
	router.GET("/support/demo/demo.js", serveAsset("assets/demo.js", "application/javascript; charset=utf-8"))
	// Keep assets working when /support/demo is opened without the trailing slash.
	router.GET("/support/demo.css", serveAsset("assets/demo.css", "text/css; charset=utf-8"))
	router.GET("/support/demo.js", serveAsset("assets/demo.js", "application/javascript; charset=utf-8"))
}

func serveIndex(ctx *gin.Context) {
	serveEmbeddedFile(ctx, "assets/index.html", "text/html; charset=utf-8")
}

func serveDemo(ctx *gin.Context) {
	serveEmbeddedFile(ctx, "assets/demo.html", "text/html; charset=utf-8")
}

func serveAsset(name string, contentType string) gin.HandlerFunc {
	return func(ctx *gin.Context) {
		serveEmbeddedFile(ctx, name, contentType)
	}
}

func serveEmbeddedFile(ctx *gin.Context, name string, contentType string) {
	data, err := assets.ReadFile(name)
	if err != nil {
		ctx.AbortWithStatus(http.StatusNotFound)
		return
	}
	ctx.Header("Cache-Control", "no-cache")
	ctx.Data(http.StatusOK, contentType, data)
}