// $KyokoNet: stcli-go,v 1.1 2022/12/13 10:07:00 akoizumi Exp 
// Command line client for SimplyTranslate, a privacy friendly frontend to Google Translate
package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"io"
	"log"
	"net/http"
	"os"
)
var (
	engine string
	from string
	instance string
	input string
	to string
)
type Translate struct {
	Output string `json:"translated-text"`
}
func init() {
	flag.StringVar(&engine, "e", "google", "Translation engine to use (default: google)")
	flag.StringVar(&from, "f", "auto", "Set the language to translate from. This can be skipped as it will autodetect the language you're translating from")
	flag.StringVar(&instance, "i", "https://simplytranslate.org/api/translate/", "Instance to use (default: https://simplytranslate.org/api/translate/)")
	flag.StringVar(&input, "I", "", "Enter the text to be translated")
	flag.StringVar(&to, "t", "en", "Set the language to translate to (default: en)")
}
func main() {
	// Begin flag parsing
	flag.Parse()
	// Check if any of those two variables is empty.
	// It actually needs the two to have content.
	if len(input) == 0 || len(to) == 0 {
		log.Fatal("Missing either the text or the target language.")
		os.Exit(1)
	}
	// Map a variable to the struct
	var translate Translate
	// Build the full URL to query
	var queryURL = instance + "?engine=" + engine + "&from=" + from + "&to=" + to + "&text=" + input
	// Begin the request and process the response
	req, err := http.Get(queryURL)
	sanityCheck(err)
	defer req.Body.Close()
	resp, err := io.ReadAll(req.Body)
	_ = json.Unmarshal([]byte(resp), &translate)
	sanityCheck(err)
	// Pretty-print both the input and the output given.
	fmt.Printf("Input: %v\n", input)
	fmt.Printf("Output: %v\n",translate.Output)
}
func sanityCheck(err error) {
	if err != nil {
		log.Fatal(err)
	}
}