use crate::utils::*;

use crate::serenity;
use crate::Context;
use crate::Error;
use poise::command;

#[command(slash_command, prefix_command, description_localized("en-US", "Get category info and links to Jisho for character(s), with stroke order for single characters."))]
pub async fn i(
    ctx: Context<'_>,
    #[description = "Input kanji to get info for"] input: String,
) -> Result<(), Error> {
    let chars = input.chars();
    let mut message = String::from("");
    let mut covered_chars: Vec<char> = Vec::new();
    let mut skipped_chars = 0;
    let mut found_chars: Vec<char> = Vec::new();
    for character in chars {
        if covered_chars.contains(&character) {
            continue;
        }
        let kanji_info = get_kanji_info(character);
        covered_chars.push(character);
        if kanji_info.len() == 0 {
            skipped_chars += 1;
            continue;
        }
        found_chars.push(character);
        message.push_str(&format!(
            "[{}](https://jisho.org/search/{}%23kanji): {}\n",
            character, character, kanji_info
        ));
    }
    message = format!(
        "Found {} kanji{}\n{}",
        found_chars.len(),
        if found_chars.len() == 0 { "." } else { ":" },
        message
    );
    if skipped_chars > 0 {
        message.push_str(&format!(
            "Skipped {} character{}.",
            skipped_chars,
            if skipped_chars == 1 { "" } else { "s" }
        ));
    }
    ctx.send(|m| {
        m.allowed_mentions(|am| {
            am.empty_parse();
            am
        });
        m.embed(|e| {
            e.title(input);
            e.description(message);
            let mut author = serenity::builder::CreateEmbedAuthor::default();
            author
                .icon_url("https://raw.githubusercontent.com/ElnuDev/ji-chan/main/ji-chan.png")
                .name("字ちゃん")
                .url("https://github.com/ElnuDev/ji-chan");
            e.set_author(author);
            e.color(serenity::utils::Colour::from_rgb(251, 73, 52));
            if found_chars.len() == 1 {
                e.thumbnail(get_so_diagram(found_chars[0]));
            }
            e
        });
        m
    })
    .await
    .unwrap();
    Ok(())
}

#[command(
    slash_command,
    prefix_command,
    description_localized("en-US", "Random Jōyō kanji")
)]
pub async fn joyo(ctx: Context<'_>) -> Result<(), Error> {
    random_kanji("JOYO", ctx, None).await
}

#[command(
    slash_command,
    prefix_command,
    description_localized("en-US", "Random Jinmeiyō kanji")
)]
pub async fn jinmeiyo(ctx: Context<'_>) -> Result<(), Error> {
    random_kanji("JINMEIYO", ctx, None).await
}

#[command(
    slash_command,
    prefix_command,
    description_localized("en-US", "Random Kyōiku kanji")
)]
pub async fn kyoiku(
    ctx: Context<'_>,
    #[description = "Kyōiku subcategory. GRADE1, GRADE2, GRADE3, GRADE4, GRADE5, GRADE6, or ALL."]
    subcategory: Option<String>,
) -> Result<(), Error> {
    random_kanji("KYOIKU", ctx, subcategory).await
}

#[command(
    slash_command,
    prefix_command,
    description_localized("en-US", "Random JLPT kanji")
)]
pub async fn jlpt(
    ctx: Context<'_>,
    #[description = "JLPT subcategory. N1, N2, N3, N4, N5, or ALL"] subcategory: Option<String>,
) -> Result<(), Error> {
    random_kanji("JLPT", ctx, subcategory).await
}

#[command(
    slash_command,
    prefix_command,
    description_localized("en-US", "Random Hyōgai kanji")
)]
pub async fn hyogai(
    ctx: Context<'_>,
    #[description = "Hyōgai subcategory. ELEMENTS, MAIN, or ALL."] subcategory: Option<String>,
) -> Result<(), Error> {
    random_kanji("HYOGAI", ctx, subcategory).await
}

#[command(
    slash_command,
    prefix_command,
    description_localized("en-US", "Get stroke order diagrams for character(s), maximum 4")
)]
pub async fn so(
    ctx: Context<'_>,
    #[description = "Input characters to get stroke order for"] text: String,
) -> Result<(), Error> {
    const MAX_CHARS: i32 = 4;
    let mut displayed_characters: Vec<char> = Vec::new();
    let mut displayed_character_count = 0;
    for character in text.chars() {
        if displayed_character_count >= MAX_CHARS {
            ctx.channel_id()
                .say(
                    &ctx.serenity_context().http,
                    ":warning: Maximum number of stroke order diagrams per command reached.",
                )
                .await?;
            break;
        }
        if character.is_whitespace() || displayed_characters.contains(&character) {
            continue;
        }
        // Don't show same character twice
        displayed_characters.push(character);
        displayed_character_count += 1;
        display_kanji(ctx, character, "").await?;
    }
    Ok(())
}