package service

import (
	"bytes"
	"github.com/dchest/captcha"
	"github.com/gin-contrib/sessions"
	"github.com/gin-gonic/gin"
	"net/http"
	"texas-poker-bk/internal/conf"
	"time"
)

func Avatar(ctx *gin.Context) {
	avatar := ctx.Param("avatar")
	ctx.Header("Cache-Control", "private, max-age=86400")
	ctx.File(conf.Conf.Game.AvatarPath + avatar)
}

// Captcha 获取验证码
func Captcha(ctx *gin.Context) {
	l, w, h := 4, 107, 36

	captchaId := captcha.NewLen(l)
	session := sessions.Default(ctx)
	session.Set("captcha", captchaId)

	_ = session.Save()
	_ = Serve(ctx.Writer, ctx.Request, captchaId, ".png", "zh", false, w, h)
}

func Serve(w http.ResponseWriter, r *http.Request, id, ext, lang string, download bool, width, height int) error {
	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
	w.Header().Set("Pragma", "no-cache")
	w.Header().Set("Expires", "0")
	var content bytes.Buffer
	switch ext {
	case ".png":
		w.Header().Set("Content-Type", "image/png")
		_ = captcha.WriteImage(&content, id, width, height)
	// 音频验证码
	case ".wav":
		w.Header().Set("Content-Type", "audio/x-wav")
		_ = captcha.WriteAudio(&content, id, lang)
	default:
		return captcha.ErrNotFound
	}
	if download {
		w.Header().Set("Content-Type", "application/octet-stream")
	}
	http.ServeContent(w, r, id+ext, time.Time{}, bytes.NewReader(content.Bytes()))
	return nil
}