use crate::commands::*;
use serde::Deserialize;
use serenity::model::channel::Message;
use std::fmt;

pub fn query_aur(ctx: Context, msg: Message, args: Vec<&str>) {
    let query = args.join(" ");
    let mut response: Response = search(
        &format!(
            "https://aur.archlinux.org/rpc/?v=5&type=search&by=name&arg={}",
            &query
        ),
        |_e| EMPTY_RESULT,
    );
    if response.results.is_empty() {
        send(msg.channel_id, "No results", &ctx);
        return;
    }
    response.results.sort_by(|a, b| {
        b.popularity
            .partial_cmp(&a.popularity)
            .unwrap_or(std::cmp::Ordering::Less)
    });
    respond_with_results(msg.channel_id, &response.results, &ctx);
}

const EMPTY_RESULT: Response = Response {
    results: Vec::new(),
};

#[derive(Deserialize)]
struct Response {
    results: Vec<Package>,
}

#[derive(Deserialize)]
struct Package {
    #[serde(rename = "Name")]
    name: String,
    #[serde(rename = "Version")]
    version: String,
    #[serde(rename = "Description")]
    description: Option<String>,
    #[serde(rename = "URL")]
    url: Option<String>,
    #[serde(rename = "NumVotes")]
    votes: u16,
    #[serde(rename = "Popularity")]
    popularity: f32,
}

impl fmt::Display for Package {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "aur/{} {} (+{})\n    {}\n    url: {}",
            self.name,
            self.version,
            self.votes,
            self.description.clone().unwrap_or(String::from("none")),
            self.url.clone().unwrap_or(String::from("none")),
        )
    }
}