import { Command } from "../command.ts";
import {
    ApplicationIntegrationType,
    Attachment,
    AttachmentBuilder,
    ChatInputCommandInteraction,
    InteractionContextType,
    SlashCommandBuilder
} from "discord.js";
import { Config } from "../config.ts";
import sharp, { SharpInput } from "sharp";
import * as path from 'path';
import { Canvas, loadImage } from "canvas";
import { readdir, readFile } from "fs/promises";

const patpatGifPath = path.join('src/commands/', 'patpatframes')

export default class PingCommand extends Command {

    async run(interaction: ChatInputCommandInteraction, config: Config) {
        const user = interaction.options.getUser('user', true)
        const speed = interaction.options.getInteger('speed') ?? 0
        const avatarResponse = await fetch(user.avatarURL({})!)
        const avatarBuf = Buffer.from(await avatarResponse.arrayBuffer())
        const frames: SharpInput[] = []
        const frame_avatar_positions = [
            [32, 102, 73, 65],
            [32, 112, 73, 47],
        ] as const

        let pos = 0
        for (const framePath of await readdir(patpatGifPath)) {
            if (!framePath.endsWith(".png")) continue
            const filePath = path.join(patpatGifPath, framePath)
            const patImage = await loadImage(filePath);
            const composite = new Canvas(patImage.width, patImage.height)
            const context = composite.getContext('2d');
            const [x, y, w, h] = frame_avatar_positions[pos++]
            const squishedAvatar = await loadImage(await sharp(avatarBuf).resize(w, h, {
                fit: 'fill'
            }).png().toBuffer())
            context.drawImage(squishedAvatar, x, y)
            context.drawImage(patImage, 0, 0)
            frames.push(composite.toBuffer('image/png'))
        }
        const webP = await sharp(
            frames,
            { join: { animated: true } }
        ).webp({ delay: new Array(pos).fill(200-speed), loop: 0 }).toBuffer();
        await interaction.reply({
            content: `Patting ${user.displayName}`,
            files: [
                new AttachmentBuilder(webP)
                    .setName('softcorepattingaction.webp')
                    .setDescription(`the ${user.displayName} is being gently patted`),
            ]
        });
    }

    slashCommand = new SlashCommandBuilder()
        .setName("pat")
        .setDescription("Pats someone!").setIntegrationTypes([
            ApplicationIntegrationType.UserInstall
        ])
        .addUserOption(builder => builder.setName("user")
            .setDescription("The one to plap")
            .setRequired(true))
        .addIntegerOption(builder => builder.setName("speed")
            .setDescription("speed (higher is faster, max is 200)")
            .setRequired(false))
        .setContexts([
            InteractionContextType.BotDM,
            InteractionContextType.Guild,
            InteractionContextType.PrivateChannel
        ]);
}