package handler

import (
	"net/http"
	"time"

	"github.com/Tencent/WeKnora/internal/application/service"
	apperrors "github.com/Tencent/WeKnora/internal/errors"
	"github.com/gin-gonic/gin"
)

func (h *DigitalHumanHandler) Trial(c *gin.Context) {
	c.Request.Body = http.MaxBytesReader(c.Writer, c.Request.Body, 32<<10)
	var input service.DigitalHumanTrialInput
	if err := c.ShouldBindJSON(&input); err != nil {
		c.Error(apperrors.NewBadRequestError("请填写有效的试写版本、主题和要求"))
		return
	}
	stream, err := h.service.Trial(c.Request.Context(), c.Param("id"), input)
	if err != nil {
		digitalHumanHTTPError(c, err)
		return
	}
	c.Header("Content-Type", "text/event-stream")
	c.Header("Cache-Control", "no-cache, no-transform")
	c.Header("X-Accel-Buffering", "no")
	c.Writer.Flush()
	ticker := time.NewTicker(10 * time.Second)
	defer ticker.Stop()
	for {
		select {
		case <-c.Request.Context().Done():
			return
		case event, ok := <-stream:
			if !ok {
				return
			}
			c.SSEvent("trial", event)
			c.Writer.Flush()
		case <-ticker.C:
			c.SSEvent("heartbeat", gin.H{"status": "running"})
			c.Writer.Flush()
		}
	}
}