package route

import (
	"net/http"
	"os"
	"os/exec"
	"path/filepath"
	"rkkvm/config"
	"rkkvm/http/hw/hid"
	"rkkvm/http/hw/stream"
	"rkkvm/http/middleware"
	"rkkvm/http/reqrsp"
	"rkkvm/http/ws"
	"strings"

	"github.com/gin-gonic/gin"
	log "github.com/sirupsen/logrus"
)

func Api(e *gin.Engine) {
	api := e.Group("/api").Use(middleware.CheckToken())

	api.GET("/stream/mjpeg", stream.MjpegHandler)
	api.GET("/ws", ws.ConnHandler)

	api.POST("/stream/webrtc", stream.WebRTCPeerConnect)
	api.GET("/stream/webrtc", stream.WebRTCSettings)

	api.POST("/storage/image", uploadHandler)
	api.GET("/storage/image", listHandler)
	api.GET("/storage/image/mounted", mountedHandler)
	api.POST("/storage/image/mount", mountHandler)
	api.POST("/storage/image/unmount", unmountHandler)
}

func uploadHandler(c *gin.Context) {
	file, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Failed to get file"})
		return
	}

	filePath := filepath.Join(config.Get().ISOPath, file.Filename)
	if err := c.SaveUploadedFile(file, filePath); err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to save file"})
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": "File uploaded successfully"})
}

func listHandler(c *gin.Context) {
	files, err := os.ReadDir(config.Get().ISOPath)
	if err != nil {
		c.JSON(http.StatusInternalServerError, reqrsp.NanoKVMRsp{
			Code: -2,
			Msg:  "get images failed",
		})
		return
	}

	var fileNames []string
	for _, f := range files {
		if !f.IsDir() {
			fname := strings.ToLower(f.Name())
			if strings.HasSuffix(fname, ".iso") || strings.HasSuffix(fname, ".img") {
				fileNames = append(fileNames, f.Name())
			}
		}
	}

	c.JSON(http.StatusOK, reqrsp.NanoKVMRsp{
		Msg: reqrsp.MsgSuccess,
		Data: reqrsp.FilesRsp{
			Files: fileNames,
		},
	})
}

func mountHandler(c *gin.Context) {
	var request struct {
		Filename string `json:"file"`
	}
	if err := c.ShouldBindJSON(&request); err != nil {
		c.JSON(http.StatusBadRequest, reqrsp.NanoKVMRsp{
			Code: -1,
			Msg:  "invalid arguments",
		})
		return
	}

	if request.Filename == "" {
		unmountHandler(c)
		return
	}

	imageFile := filepath.Join(config.Get().ISOPath, request.Filename)
	_, err := os.Stat(imageFile)
	if os.IsNotExist(err) {
		c.JSON(http.StatusInternalServerError, reqrsp.NanoKVMRsp{
			Code: -2,
			Msg:  "file not exists: " + request.Filename,
		})
		return
	}

	hid.GetHid().Close()

	cmds := []string{
		"/hid.sh detach",
		"/hid.sh mount_iso " + imageFile, //+ strconv.Quote(imageFile),
		"/hid.sh attach",
	}

	for _, cmd := range cmds {
		log.Debugf("Executing: %s", cmd)
		cc := exec.Command("sh", "-c", cmd)
		cc.Stdout = os.Stdout
		cc.Stderr = os.Stderr
		if err := cc.Run(); err != nil {
			c.JSON(http.StatusInternalServerError, reqrsp.NanoKVMRsp{
				Code: -2,
				Msg:  "execute command failed: " + cmd,
			})
			return
		}
	}

	hid.GetHid().Open()

	c.JSON(http.StatusOK, reqrsp.NanoKVMRsp{
		Msg: reqrsp.MsgSuccess,
	})
}

func unmountHandler(c *gin.Context) {
	hid.GetHid().Close()

	cmds := []string{
		"/hid.sh detach",
		"/hid.sh unmount_iso",
		"/hid.sh attach",
	}

	for _, cmd := range cmds {
		log.Debugf("Executing: %s", cmd)
		cc := exec.Command("sh", "-c", cmd)
		cc.Stdout = os.Stdout
		cc.Stderr = os.Stderr
		if err := cc.Run(); err != nil {
			c.JSON(http.StatusInternalServerError, reqrsp.NanoKVMRsp{
				Code: -2,
				Msg:  "execute command failed: " + cmd,
			})
			return
		}
	}

	hid.GetHid().Open()

	c.JSON(http.StatusOK, reqrsp.NanoKVMRsp{
		Msg: reqrsp.MsgSuccess,
	})
}

func mountedHandler(c *gin.Context) {
	cmd := exec.Command("/hid.sh", "mounted_iso")
	output, err := cmd.Output()
	if err != nil {
		c.JSON(http.StatusInternalServerError, reqrsp.NanoKVMRsp{
			Code: -2,
			Msg:  "read failed",
		})
		return
	}
	fname := strings.TrimSpace(string(output))
	_, err = os.Stat(fname)
	if os.IsNotExist(err) {
		c.JSON(http.StatusInternalServerError, reqrsp.NanoKVMRsp{
			Code: -2,
			Msg:  "file not exists: " + fname,
		})
		return
	}

	c.JSON(http.StatusOK, reqrsp.NanoKVMRsp{
		Msg: reqrsp.MsgSuccess,
		Data: reqrsp.FileRsp{
			File: filepath.Base(fname),
		},
	})
}