package server

import (
	"bufio"
	"deploy/pkg/config"
	"os/exec"

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

type HTTPServer struct {
	Engine *gin.Engine
	Logger *logrus.Logger
}

func NewServer(logger *logrus.Logger) *HTTPServer {
	e := gin.Default()

	s := &HTTPServer{
		Engine: e,
		Logger: logger,
	}

	return s
}

func (s *HTTPServer) setHandler(check map[string]string, script string) gin.HandlerFunc {
	return func(c *gin.Context) {
		if len(check) > 0 {
			for k, v := range check {
				if c.GetHeader(k) != v {
					s.Logger.WithFields(logrus.Fields{
						"method": c.Request.Method,
						"path":   c.Request.URL.Path,
						"header": k,
					}).Warnf("header value not match\n")

					c.AbortWithStatus(403)
					return
				}
			}
		}

		// ctx := c.Copy()
		go func() {
			cmd := exec.Command(script)

			// r, w := io.Pipe()
			nlog := s.Logger.WithFields(logrus.Fields{"script": script})
			reader, err := cmd.StdoutPipe()
			if err != nil {
				nlog.Warnf("setup pipe out fail: %+v\n", err)
			}
			errReader, err := cmd.StderrPipe()
			if err != nil {
				nlog.Warnf("setup pipe out fail: %+v\n", err)
			}

			if err := cmd.Start(); err != nil {
				nlog.Warnf("start script fail: %+v\n", err)
			}

			go func() {
				in := bufio.NewScanner(reader)
				for in.Scan() {
					nlog.Debugf(in.Text())
				}
				if err := in.Err(); err != nil {
					nlog.Warnf("script error: %+v\n", err)
				}
			}()
			go func() {
				in := bufio.NewScanner(errReader)
				for in.Scan() {
					nlog.Debugf(in.Text())
				}
				if err := in.Err(); err != nil {
					nlog.Warnf("script error: %+v\n", err)
				}
			}()

		}()

		c.String(200, "ok")
	}
}

func (s *HTTPServer) SetRoutes(listens []config.Listen) error {
	if len(listens) == 0 {
		return nil
	}

	for _, v := range listens {
		if v.HTTP == nil {
			continue
		}

		switch v.HTTP.Method {
		case "POST":
			s.Engine.POST(v.HTTP.Path, s.setHandler(v.HTTP.Headers, v.HTTP.Script))
			break
		case "GET":
			s.Engine.GET(v.HTTP.Path, s.setHandler(v.HTTP.Headers, v.HTTP.Script))
			break
		default:
			break
		}
	}

	return nil
}