use crate::imgur::{get_album_images, Image};
use crate::{command, group, GlobalData};
use magick_rust::{DrawingWand, MagickWand, PixelWand};
use rand::prelude::IteratorRandom;
use rand::thread_rng;
use serenity::client::Context;
use serenity::framework::standard::{Args, CommandResult};
use serenity::model::channel::{AttachmentType, Message};
use std::borrow::Cow;

#[group]
#[commands(motivation)]
pub struct Motivate;

#[command]
#[only_in(guilds)]
#[description("Let's give you motivation")]
async fn motivation(ctx: &Context, msg: &Message, _args: Args) -> CommandResult {
    let data = ctx.data.read().await;
    let global_data = data.get::<GlobalData>().unwrap();

    let album = &global_data
        .cfg
        .motivation
        .album
        .iter()
        .choose(&mut thread_rng())
        .unwrap();

    let images = get_album_images(&global_data.cfg.imgur_client_id, album).await?;
    let motivation_image_link: &Image = images.iter().choose(&mut thread_rng()).unwrap();

    let motivation_image_blob = reqwest::get(&motivation_image_link.link)
        .await?
        .bytes()
        .await?;

    let action = global_data
        .cfg
        .motivation
        .action
        .iter()
        .choose(&mut thread_rng())
        .unwrap();
    let goal = global_data
        .cfg
        .motivation
        .goal
        .iter()
        .choose(&mut thread_rng())
        .unwrap();
    let motivation = format!("{} {}", action, goal);

    let image = {
        let mut wand = MagickWand::new();
        let mut border_wand = PixelWand::new();
        wand.read_image_blob(motivation_image_blob)?;

        border_wand.set_color("white")?;
        let width = wand.get_image_width();
        let border = width / 100;
        wand.border_image(
            &border_wand,
            border,
            border,
            magick_rust::bindings::CompositeOperator_OverCompositeOp,
        )?;

        border_wand.set_color("black")?;
        let width = wand.get_image_width();
        let border = width * 20 / 100;
        wand.border_image(
            &border_wand,
            border,
            border,
            magick_rust::bindings::CompositeOperator_OverCompositeOp,
        )?;

        let text_pos_x = wand.get_image_width() as f64 / 2.0;
        let text_pos_y = wand.get_image_height() as f64 - (wand.get_image_height() as f64 * 0.05);

        let mut text_wand = DrawingWand::new();
        let mut text_color_wand = PixelWand::new();
        text_color_wand.set_color("white")?;
        text_wand.set_fill_color(&text_color_wand);
        text_wand.set_font_size(0.07 * (wand.get_image_width() as f64));
        text_wand.set_text_alignment(magick_rust::bindings::AlignType_CenterAlign);
        wand.annotate_image(&text_wand, text_pos_x, text_pos_y, 0.0, &motivation)?;
        wand.write_image_blob("png")?
    };

    msg.channel_id
        .send_message(&ctx.http, |m| {
            m.content("Today's motivation")
                .add_file(AttachmentType::Bytes {
                    data: Cow::from(image),
                    filename: "motivate.png".to_string(),
                })
        })
        .await?;

    Ok(())
}