package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"strconv"
	"strings"
	"syscall"
	"time"

	"thoughtful-dcbob/commands"

	"github.com/bwmarrin/discordgo"
)

func main() {
	// Create a new Discord session using the provided bot token.
	token := os.Getenv("DISCORD_BOT_TOKEN")
	if token == "" {
		fmt.Println("DISCORD_BOT_TOKEN not set; aborting")
		return
	}
	dg, err := discordgo.New("Bot " + token)
	if err != nil {
		fmt.Println("error creating Discord session,", err)
		return
	}

	// Register handlers
	dg.AddHandler(messageCreate)
	dg.AddHandler(func(s *discordgo.Session, ic *discordgo.InteractionCreate) {
		commands.HandleInteraction(s, ic)
	})

	// Just like the ping pong example, we only care about receiving message
	// events in this example.
	dg.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsGuilds | discordgo.IntentsMessageContent

	// Open a websocket connection to Discord and begin listening.
	err = dg.Open()
	if err != nil {
		fmt.Println("error opening connection,", err)
		return
	}

	// After opening, register slash commands.
	if err := commands.RegisterAll(dg); err != nil {
		fmt.Println("error registering commands:", err)
		// continue running; commands may be registered later
	}

	// Start Kuma push monitor if configured
	kumaPushURL := os.Getenv("Kuma-Push-Url")
	if kumaPushURL != "" {
		intervalStr := os.Getenv("Kuma-Push-Interval")
		interval := 60 // default to 60 seconds
		if intervalStr != "" {
			if parsed, err := strconv.Atoi(intervalStr); err == nil && parsed > 0 {
				interval = parsed
			}
		}
		go startKumaPush(kumaPushURL, interval)
		log.Printf("Kuma push monitor started (URL: %s, Interval: %ds)", kumaPushURL, interval)
	}

	// Wait here until CTRL-C or other term signal is received.
	fmt.Println("Bot is now running. Press CTRL-C to exit.")
	sc := make(chan os.Signal, 1)
	signal.Notify(sc, syscall.SIGINT, syscall.SIGTERM, os.Interrupt)
	<-sc

	// Cleanly close down the Discord session.
	dg.Close()
}

// startKumaPush periodically sends GET requests to the Kuma push URL
func startKumaPush(url string, intervalSeconds int) {
	ticker := time.NewTicker(time.Duration(intervalSeconds) * time.Second)
	defer ticker.Stop()

	for range ticker.C {
		pushToKuma(url)
	}
}

// pushToKuma sends a GET request to the Kuma push URL with retry logic
func pushToKuma(url string) {
	client := &http.Client{Timeout: 10 * time.Second}

	// First attempt
	resp, err := client.Get(url)
	if err != nil {
		log.Printf("Kuma push failed: %v (retrying in 15s)", err)
		time.Sleep(15 * time.Second)

		// Retry attempt
		resp, err = client.Get(url)
		if err != nil {
			log.Printf("Kuma push retry failed: %v", err)
			return
		}
		defer resp.Body.Close()
		log.Printf("Kuma push retry succeeded: status %d", resp.StatusCode)
		return
	}
	defer resp.Body.Close()
	log.Printf("Kuma push: status %d", resp.StatusCode)
}

// This function will be called (due to AddHandler above) every time a new
// message is created on any channel that the authenticated bot has access to.
//
// It is called whenever a message is created but only when it's sent through a
// server as we did not request IntentsDirectMessages.
func messageCreate(s *discordgo.Session, m *discordgo.MessageCreate) {
	// Ignore all messages created by the bot itself
	// This isn't required in this specific example but it's a good practice.
	if m.Author.ID == s.State.User.ID {
		return
	}
	// Non-slash command: .thought Title; Description
	if strings.HasPrefix(m.Content, ".thought") {
		cfg, ok, err := commands.GetUserConfig(m.Author.ID)
		if err != nil {
			s.ChannelMessageSend(m.ChannelID, "Storage error.")
			return
		}
		if !ok {
			s.ChannelMessageSend(m.ChannelID, "Please run `/setup` first to configure your Thoughtful instance.")
			return
		}

		rest := strings.TrimSpace(m.Content[len(".thought"):])
		if rest == "" {
			s.ChannelMessageSend(m.ChannelID, "Usage: .thought Title; Description")
			return
		}
		parts := strings.SplitN(rest, ";", 2)
		title := strings.TrimSpace(parts[0])
		desc := ""
		if len(parts) > 1 {
			desc = strings.TrimSpace(parts[1])
		}

		payload := map[string]string{"title": title, "description": desc}
		b, _ := json.Marshal(payload)

		req, _ := http.NewRequest("POST", cfg.InstanceURL+"/api/ideas/create", bytes.NewReader(b))
		req.Header.Set("API-Authentication", cfg.APIKey)
		req.Header.Set("Content-Type", "application/json")

		client := &http.Client{}
		resp, err := client.Do(req)

		if err != nil {
			s.ChannelMessageSend(m.ChannelID, "Failed to send to API: "+err.Error())
			return
		}
		defer resp.Body.Close()

		if resp.StatusCode == 200 {
			s.ChannelMessageSend(m.ChannelID, "Thought created successfully!")
		} else {
			s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("Failed to create thought. Status: %d", resp.StatusCode))
		}
		return
	}
}