package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"math/rand"
	"os"
	"path/filepath"
	"time"

	builtins "git.martyn.berlin/martyn/karaokards/internal/builtins"
	irc "git.martyn.berlin/martyn/karaokards/internal/irc"
	rgb "github.com/foresthoffman/rgblog"
)

type customStringsStruct struct {
	Strings []string `json:"strings,omitempty"`
}

var selectablePrompts []string

var customStrings customStringsStruct

func readBonusStrings() []string {

	ex, err := os.Executable()
	if err != nil {
		return []string{}
		fmt.Println("Could not read `strings.json`, will only have builtin prompts. File reading error", err)
	}
	exPath := filepath.Dir(ex)
	data, err := ioutil.ReadFile(exPath + "/strings.json")
	if err != nil {
		fmt.Println("Could not read `strings.json`, will only have builtin prompts. File reading error", err)
		return []string{}
	}
	err = json.Unmarshal(data, &customStrings)
	if err != nil {
		fmt.Println("Could not unmarshal `strings.json`, will only have builtin prompts. Unmarshal error", err)
		return []string{}
	}
	fmt.Println("Read ", len(customStrings.Strings), " prompts from `strings.json`")
	return customStrings.Strings
}

func main() {

	rand.Seed(time.Now().UnixNano())
	for _, val := range builtins.Karaokards {
		selectablePrompts = append(selectablePrompts, val)
	}
	for _, val := range readBonusStrings() {
		selectablePrompts = append(selectablePrompts, val)
	}
	fmt.Println(len(selectablePrompts), " prompts available.")
	oauthPath := ""
	if os.Getenv("TWITCH_OAUTH_JSON") != "" {
		if _, err := os.Stat(os.Getenv("TWITCH_OAUTH_JSON")); os.IsNotExist(err) {
			os.Exit(1)
		}
		oauthPath = os.Getenv("TWITCH_OAUTH_JSON")
	} else {
		if _, err := os.Stat(os.Getenv("HOME") + "/.twitch/oauth.json"); os.IsNotExist(err) {
			rgb.YPrintf("[%s] Warning %s doesn't exist, trying %s next!\n", irc.TimeStamp(), os.Getenv("HOME")+"/.twitch/oauth.json", "/etc/twitch/oauth.json")
			if _, err := os.Stat("/etc/twitch/oauth.json"); os.IsNotExist(err) {
				rgb.YPrintf("[%s] Error %s doesn't exist either, bailing!\n", irc.TimeStamp(), "/etc/twitch/oauth.json")
				os.Exit(1)
			}
			oauthPath = "/etc/twitch/oauth.json"
		} else {
			oauthPath = os.Getenv("HOME") + "/.twitch/oauth.json"
		}
	}
	// Replace the channel name, bot name, and the path to the private directory with your respective
	// values.
	myBot := irc.KardBot{
		Channel:     "imartynontwitch",
		MsgRate:     time.Duration(20/30) * time.Millisecond,
		Name:        "Karaokards",
		Port:        "6667",
		PrivatePath: oauthPath,
		Server:      "irc.chat.twitch.tv",
		Prompts:     selectablePrompts,
	}
	myBot.Start()
}