use crate::discord::Context;
use crate::error::Error;
use crate::models::improvements::{ImprovementType, Improvements};
use crate::user::User;
use poise::serenity_prelude::MessageBuilder;
use strum::IntoEnumIterator;
use thousands::Separable;

/// List out all the improvements available for the bot
#[poise::command(prefix_command, guild_only, category = "Improvements")]
pub async fn improvements(ctx: Context<'_>) -> Result<(), Error> {
    let mut msg_builder = MessageBuilder::new();

    msg_builder.push_line("# Fren Bot Improvements");
    msg_builder.push_line("Anything can be improved with enough Fren Coins!");
    msg_builder.push_line("");

    let improvements = Improvements::get_improvement_config(&ctx.data().db)?;

    for improvement_type in ImprovementType::iter() {
        msg_builder.push("* ");

        if let Some(improvement) = improvements.get_improvement(&improvement_type) {
            if improvement.has_at_least_one_level() {
                if improvement_type.has_levels() {
                    msg_builder.push(format!(
                        "({}/{} FC Level={}) ",
                        improvement.funding_amount.separate_with_commas(),
                        improvement_type.price().separate_with_commas(),
                        improvement.level
                    ));
                } else {
                    msg_builder.push(" (✅) ");
                }
            } else {
                msg_builder.push(format!(
                    "({}/{} FC) ",
                    improvement.funding_amount.separate_with_commas(),
                    improvement_type.price().separate_with_commas(),
                ));
            }
        } else {
            msg_builder.push(format!(
                "(0/{} FC) ",
                improvement_type.price().separate_with_commas()
            ));
        }

        msg_builder.push_line(format!(
            "**{}**: {}",
            improvement_type.name(),
            improvement_type.description()
        ));
    }

    ctx.reply(msg_builder.build()).await?;

    Ok(())
}

/// Buy an improvement for the bot!
#[poise::command(prefix_command, guild_only, category = "Improvements")]
pub async fn buy_improvement(
    ctx: Context<'_>,
    #[min = 0u32]
    #[description = "Amount to contribute"]
    amount: u32,
    #[description = "Improvement to contribute to"]
    #[rest]
    improvement_type: ImprovementType,
) -> Result<(), Error> {
    if Improvements::check_is_completed(&ctx.data().db, improvement_type)? {
        ctx.reply("Sorry, that improvement has already been purchased.")
            .await?;
        return Ok(());
    }

    User::try_take_funds(
        &ctx.data().db,
        ctx.author().id,
        improvement_type.price() as u32,
    )?;

    let (has_improved, _) =
        Improvements::contribute_to_improvement(&ctx.data().db, improvement_type, amount as u64)?;

    if has_improved {
        ctx.reply(improvement_type.post_buy_description()).await?;
    } else {
        ctx.reply(format!(
            "Thank you for contributing to {}",
            improvement_type.name()
        ))
        .await?;
    }

    Ok(())
}

/// View Friendship Tower and all its glory!!!
#[poise::command(prefix_command, guild_only, category = "Improvements")]
pub async fn friendship_tower(ctx: Context<'_>) -> Result<(), Error> {
    let improvements = Improvements::get_improvement_config(&ctx.data().db)?;
    if let Some(tower) = improvements.get_improvement(&ImprovementType::FriendshipTower) {
        let buffer = 2;
        let pic_height = tower.level as usize + buffer + 1;
        let width = 5;
        let pic_width = width + buffer * 2;
        let tower_level = tower.level as usize + buffer;

        let mut msg_builder = MessageBuilder::new();
        msg_builder.push_line("BEHOLD ALL ITS GLORY. MY FINEST CREATION, THE THING THAT WILL BRING US ALL SALVATION!!!!");
        msg_builder.push_line("");

        for row in 0..pic_height {
            let line = if row < buffer {
                "🟦".repeat(pic_width)
            } else if row < tower_level {
                "🟦🟦⬛⬛⬛⬛⬛🟦🟦".to_string()
            } else {
                "🟩".repeat(pic_width)
            };

            msg_builder.push_line(line);
        }

        ctx.reply(msg_builder.build()).await?;
    } else {
        ctx.reply("This is where I would put my tower, IF I HAD ONE!!!!")
            .await?;
    }

    Ok(())
}

/// See how big Jotchua's college fund is!
#[poise::command(prefix_command, guild_only, category = "Improvements")]
pub async fn jotchua_college_fund(ctx: Context<'_>) -> Result<(), Error> {
    let improvements = Improvements::get_improvement_config(&ctx.data().db)?;
    let funds_level =
        if let Some(fund) = improvements.get_improvement(&ImprovementType::JotchuaCollegeFund) {
            fund.level
        } else {
            0
        };

    let college_savings = funds_level as u64 * ImprovementType::JotchuaCollegeFund.price();

    let jotch = match college_savings {
        0..30_000 => ":VoidJotch:",
        30_000..120_000 => ":Jotch:",
        120_000.. => ":AscendedJotch:",
    };

    ctx.reply(format!(
        "{jotch} has {} FC in the bank for his college fund!",
        college_savings
    ))
    .await?;

    Ok(())
}