import {REST, Routes, Client, GatewayIntentBits, CommandInteraction, EmbedBuilder, CommandInteractionOption, CommandInteractionOptionResolver } from "discord.js";
import * as fs from "node:fs";
import commands from "./commands.js";
import {MakePrediction} from "./predictor.js";
import Election from "./election.js";
import CandidateEmojis from "./candidateEmojis.js";
import Elections from "./elections/elections.js";
import VoteType from "./VoteType.js";

const configraw = fs.readFileSync("config.json", "utf-8");
const config = JSON.parse(configraw);

if (!config.token) {
    console.error("Please provide a Token and Client ID in config.json");
    process.exit(1);
}

(async () => {
    const client = new Client({ intents: [GatewayIntentBits.Guilds] });

    client.on('ready', async () => {
        console.log(`Logged in as ${client.user!.tag}!`);
        await publishSlashCommands(client.application!.id);
    });

    client.on('interactionCreate', async i => {
        if (i instanceof CommandInteraction) {
			await i.deferReply();
            switch (i.commandName) {
				case "approval":
					// TODO: Replace this with API!
					let poll_data = JSON.parse(fs.readFileSync('data/approval_rating.json', "utf-8"));
					let polls = "";
					var source = i.options.get('source')?.value as string 
					switch (source) {
						case "thehill":
							// source: https://elections2024.thehill.com/national/biden-approval-rating/
							polls = `${poll_data.thehill.description}:\n\n`;
							Object.keys(poll_data.thehill.polls).forEach(poll => {
								polls += `:red_circle: **${poll_data.thehill.polls[poll].pollster}** - (**${poll_data.thehill.polls[poll].date}**), ${poll_data.thehill.polls[poll].sample}, **${poll_data.thehill.polls[poll].approve}**% approve, **${poll_data.thehill.polls[poll].disapprove}**% disapprove (**${poll_data.thehill.polls[poll].spread}**)\n`;
							});
							break;
						case "fivethirtyeight":
							// source: https://projects.fivethirtyeight.com/biden-approval-rating/
							polls = `${poll_data.fivethirtyeight.description}:\n\n`;
							Object.keys(poll_data.fivethirtyeight.polls).forEach(poll => {
								polls += `:red_circle: **${poll_data.fivethirtyeight.polls[poll].pollster}** - (**${poll_data.fivethirtyeight.polls[poll].date}**), ${poll_data.fivethirtyeight.polls[poll].sample}, **${poll_data.fivethirtyeight.polls[poll].approve}**% approve, **${poll_data.fivethirtyeight.polls[poll].disapprove}**% disapprove (adjusted: **${poll_data.fivethirtyeight.polls[poll].approve_adjusted}**% approve, **${poll_data.fivethirtyeight.polls[poll].disapprove_adjusted}**% disapprove) (**${poll_data.fivethirtyeight.polls[poll].spread}**)\n`;
							});
							break;
						default:
							// source: https://www.realclearpolling.com/polls/approval/joe-biden/approval-rating
							polls = `${poll_data.rcp.description}:\n\n`;
							Object.keys(poll_data.rcp.polls).forEach(poll => {
								polls += `:red_circle: **${poll_data.rcp.polls[poll].pollster}** - (**${poll_data.rcp.polls[poll].date}**), ${poll_data.rcp.polls[poll].sample}, **${poll_data.rcp.polls[poll].approve}**% approve, **${poll_data.rcp.polls[poll].disapprove}**% disapprove (spread: **${poll_data.rcp.polls[poll].spread}**)\n`;
							});
							break;
					}
					await i.editReply(`${polls}`);
					break;
					
				case "test":
					var country = i.options.get('country')?.value as string 
					var election_type = i.options.get('type')?.value as string 
					var year = Number(i.options.get('year')?.value)
					let query = await fetch(`http://127.0.0.1:3000/api/v1/election/${country}/${election_type}/${year}`); // temp test url
					let results = await query.json();
					
					if (query.ok) {
						if(results[year] != undefined) {
							var embed = new EmbedBuilder() 
								.setTitle(` ${results[year][0].election_name}`)
								.setDescription("API test")
								.addFields(Object.values(results[year][0].candidates).map((candidate: any) => ({
									name: `${candidate.winner ? ":white_check_mark:" : ""} ${CandidateEmojis[candidate.party] ?? ""} ${candidate.name} ${candidate.incumbent ? "(I)" : ""} (${candidate.party})`,
									value: `${results[year][0].election_type === "electoral" ? `${candidate.electoral_votes} electoral votes\n` : ""}${results[year][0].election_type === "parliament" ? `${candidate.seats_won} seats\n` : ""}${candidate.states_carried !== null && candidate.states_carried !== undefined ? `${candidate.states_carried} states carried\n` : ""}${candidate.delegates !== null && candidate.delegates !== undefined ? `${candidate.delegates} delegates\n` : ""}${candidate.votes !== null && candidate.votes !== undefined ? `${candidate.votes.toLocaleString()} votes (${candidate.percent}%)` : ""}`,
									inline: true
								})))
								.setTimestamp();
							
							if(results[year][0].has_map === true) {
								const map = await fetch(`http://127.0.0.1:3000/api/v1/election/${country}/${election_type}/${year}/map`); // temp test url
								if (map.ok) {
									const arrayBuffer = await map.arrayBuffer();
									const buffer = Buffer.from(arrayBuffer);
									embed.setImage("attachment://map.png");
									await i.editReply({embeds: [embed], files: [{attachment: buffer, name: "map.png"}]});
									break;
								} else {
									await i.editReply({embeds: [embed]});
									break;
								}
							} else {
								await i.editReply({embeds: [embed]});
								break;
							}
						} else {
							await i.editReply("Election not found");
							break;
						}
					} else {
						await i.editReply("An error occurred fetching the data");
						break;
					}
					break;
					
                case "simulate":
					var electionname = (i.options as CommandInteractionOptionResolver).getSubcommand();
					var overlayimage = (i.options as CommandInteractionOptionResolver).getAttachment('image_overlay');
					var overlayopacity = Number(i.options.get('image_opacity')?.value);

					var election = structuredClone(Elections[electionname]);
					for (const candidate of election.candidates) {
						var option = (i.options as CommandInteractionOptionResolver).getString(candidate.party.toLowerCase().replace(/ /g, "_") + "_candidate");
						if (option) {
							candidate.name = option;
						}
						var bias = (i.options as CommandInteractionOptionResolver).getNumber(candidate.party.toLowerCase().replace(/ /g, "_") + "_bias");
						if (bias) {
							for (const state of Object.keys(election.states)) {
								election.states[state].odds[candidate.party] += bias;
							}
						}
					}

					var newcandidate = (i.options as CommandInteractionOptionResolver).getString("add_candidate");
					if (newcandidate) {
						var party = (i.options as CommandInteractionOptionResolver).getString("with_party") || "Independent";
						var color = (i.options as CommandInteractionOptionResolver).getString("with_color") || "#bfab22";
						var odds = (i.options as CommandInteractionOptionResolver).getNumber("with_odds") || 0.33;
						if (!/^#[0-9A-Fa-f]{3,6}$/.test(color)) {
							await i.editReply("Please provide a valid hex color code");
							return;
						}
						if (election.candidates.some(c => c.party === party || c.name === newcandidate)) {
							await i.editReply("A candidate with that name or party already exists");
							return
						}
						election.candidates.push({
							name: newcandidate,
							party: party,
							color: color
						});
						for (const state of Object.keys(election.states))
							election.states[state].odds[party] = odds;
					}
					if (overlayimage !== null) {
						if (overlayimage.size > 5000000) {
							await i.editReply("Keep images under 5 MB please!");
							return;
						}
						if (overlayimage.contentType?.substring(0, 5) != "image") {
							await i.editReply("Invalid image!");
							return;
						}
					}
					if (overlayopacity > 100 || overlayopacity < 0) {
						await i.editReply("Invalid opacity!");
						return;
					}
					var result = await MakePrediction(election, overlayimage?.url, overlayopacity ? Math.round((overlayopacity / 100) * 255) : 255);
					var embed = new EmbedBuilder()
						.setTitle(election.title)
						.setDescription(election.description.replace("$WINNER", result.winner))
						.addFields(result.candidates.map(c => {
							return {
								name: `${(result.winner === c.name ? ":white_check_mark:" : "")} ${c.name} (${c.party})`,
								value: `${election.voteType === VoteType.Electoral ? `${c.electoralVotes} electoral votes\n` : ""}${c.votes.toLocaleString()} votes (${((c.votes / result.totalVotes) * 100).toFixed(2)}%)`,
								inline: true
							}
						}))
						.setImage("attachment://election.png")
						.setTimestamp();
					await i.editReply({embeds: [embed], files: [{attachment: result.png, name: "election.png"}]});
            }
        }
    });

    client.login(config.token);
})();

async function publishSlashCommands(clientid : string) {
    const rest = new REST({ version: '10' }).setToken(config.token);
    await rest.put(Routes.applicationCommands(clientid), {body: commands});
    console.log("Successfully registered slash commands");
}