package controller

import (
	"encoding/json"
	"io"
	"net/http"
	"strings"

	"github.com/gorilla/mux"
	"github.com/gravitl/netmaker/database"
	"github.com/gravitl/netmaker/logger"
	"github.com/gravitl/netmaker/logic"
	"github.com/gravitl/netmaker/models"
	"golang.org/x/crypto/bcrypt"
)

// swagger:route PUT /api/nodes/{network}/{nodeid}/migrate nodes migrateNode
//
// Used to migrate a legacy node.
//
//			Schemes: https
//
//			Security:
//	  		oauth
//
//			Responses:
//				200: nodeJoinResponse
func migrate(w http.ResponseWriter, r *http.Request) {
	// we decode our body request params
	data := models.MigrationData{}
	err := json.NewDecoder(r.Body).Decode(&data)
	if err != nil {
		logger.Log(0, r.Header.Get("user"), "error decoding request body: ", err.Error())
		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
		return
	}
	params := mux.Vars(r)
	//check authorization
	record, err := database.FetchRecord(database.NODES_TABLE_NAME, data.LegacyNodeID)
	if err != nil {
		logger.Log(0, "no record for legacy node", data.LegacyNodeID, err.Error())
		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
		return
	}
	var legacyNode models.LegacyNode
	if err = json.Unmarshal([]byte(record), &legacyNode); err != nil {
		logger.Log(0, "error decoding legacy node", err.Error())
		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
		return
	}
	if err := bcrypt.CompareHashAndPassword([]byte(legacyNode.Password), []byte(data.Password)); err != nil {
		logger.Log(0, "error decoding legacy password", err.Error())
		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "unauthorized"))
		return
	}
	network, err := logic.GetNetwork(params["network"])
	if err != nil {
		logger.Log(0, "error retrieving network:  ", err.Error())
		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
		return
	}
	key, err := logic.CreateAccessKey(models.AccessKey{}, network)
	if err != nil {
		logger.Log(0, "error creating key:  ", err.Error())
		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
		return
	}
	data.JoinData.Key = key.Value
	payload, err := json.Marshal(data.JoinData)
	if err != nil {
		logger.Log(0, "error encoding data:  ", err.Error())
		logic.ReturnErrorResponse(w, r, logic.FormatError(err, "badrequest"))
		return
	}
	r.Body = io.NopCloser(strings.NewReader(string(payload)))
	r.ContentLength = int64(len(string(payload)))
	createNode(w, r)
}