package readers

import (
	"StoreBackEnd/pkg/protocol"
	"fmt"
	"io"
	"net"
	"os"
)

// SendFileRulePrefix Rule command prefix
const SendFileRulePrefix = "ffe_sendfile"

// SendFileRule Storage structure for the SendFileRule
type SendFileRule struct {
	// cmd Rule name
	cmd string
	// matcher Allow to make a regex match
	matcher *protocol.RegexMatcher
}

// CreateSendFileRule Creating an instance of SendFileRule
func CreateSendFileRule(pattern string) protocol.IProtocolReader {
	return &SendFileRule{
		cmd:     SendFileRulePrefix,
		matcher: protocol.CreateRegexMatcher(pattern),
	}
}

// GetCmd retrieve the command name.
func (rule SendFileRule) GetCmd() string {
	return rule.cmd
}

// Execute the Rule with a string command.
func (rule SendFileRule) Execute(data string) (string, bool, func(r net.Conn) (string, bool)) {
	if rule.Match(data) { // TODO : cloture this command.
		values := rule.matcher.Parse(data)

		// Values
		fileName := values[1]
		// fileSize := values[2]
		// fileContentHash := values[3]

		// print received data
		println(values[1], " File Name Hash")
		println(values[2], " File Size")
		println(values[3], " File Content Hash")

		// function callback
		callback := func(con net.Conn) (string, bool) {
			file, _ := os.Create(fmt.Sprintf("D:\\tmp\\%s", fileName))

			_, err := io.Copy(file, con)
			println("HEY1")
			if err != nil {
				println("Can't copy file")
				return "SEND_ERROR\r", false
			}
			println("HEY2")
			return "SEND_OK\r", true
		}
		return "SEND_OK\r", true, callback
	} else {
		println("AHAHAHAHAHAHA")
		return "SEND_ERROR\r", false, nil
	}
}

// Match make a match with the current Rule and check if it matches.
func (rule SendFileRule) Match(data string) bool {
	return rule.matcher.Match(data)
}