package handler

import (
	"embed"
	"io/fs"
	"net/http"
	"os"
	"time"

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

// GetDocs 返回文档端点：运行目录 docs/ 下同名文件优先（可热更新），否则用内嵌副本。
func GetDocs(docsFS embed.FS) gin.HandlerFunc {
	readDoc := func(name string) string {
		if data, err := os.ReadFile("docs/" + name); err == nil {
			return string(data)
		}
		if data, err := fs.ReadFile(docsFS, "docs/"+name); err == nil {
			return string(data)
		}
		return ""
	}
	return func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{
			"guide":     readDoc("GUIDE.md"),
			"api":       readDoc("API.md"),
			"updatedAt": time.Now().Format("2006-01-02 15:04:05"),
		})
	}
}