package main

import (
	"encoding/json"
	"io/ioutil"
	"net/http"
	"net/url"
	"os"
	"os/exec"

	"./rofi"
)

var (
	serial = 0
)

func getSuggestions(query string) []string {
	param := url.Values{}
	param.Add("q", query)
	param.Add("type", "list")
	param.Add("kl", "en-US")

	resp, _ := http.Get("https://ac.duckduckgo.com/ac?" + param.Encode())
	body, _ := ioutil.ReadAll(resp.Body)
	resp.Body.Close()

	var result []interface{}
	json.Unmarshal(body, &result)

	if len(result) < 2 {
		return []string{query}
	}

	rtn := make([]string, len(result[1].([]interface{}))+1)
	rtn[0] = query
	for i, v := range result[1].([]interface{}) {
		rtn[i+1] = v.(string)
	}

	return rtn
}

func handleSelect(input rofi.Input) {
	param := url.Values{}
	param.Add("q", input.Value)
	exec.Command("xdg-open", "https://duckduckgo.com/?"+param.Encode()).Start()
	os.Exit(0)
}

func handleInputChange(input rofi.Input) {
	serial++
	go genOutput(input, serial)
}

func genOutput(input rofi.Input, mySerial int) {
	output := rofi.NewOutput()
	output.Lines = rofi.ConvertStringsToLine(getSuggestions(input.Value))
	if serial == mySerial {
		rofi.SendOutput(output)
	}
}

func main() {
	// Setup rofi
	initialOutput := rofi.NewOutput()
	initialOutput.Prompt = "Search"
	initialOutput.InputAction = "send"
	rofi.SendOutput(initialOutput)

	rofi.InputChangeCallback = handleInputChange
	rofi.SelectEntryCallback = handleSelect
	rofi.InputLoop()
}