//! Download card information.

use anyhow::{Result, anyhow};
use reqwest::Client;
use scraper::{Html, Selector};

use crate::card::{CardInfo, CardKind, CardType, InnerCardInfo, SpecificInfo};
use crate::editions::EditionCode;
use crate::lang::Language;

pub async fn download_card_info(
    client: Client,
    lang: Language,
    code: EditionCode,
    number: u8,
    override_slug: Option<&str>,
) -> Result<CardInfo> {
    let url = format!(
        "{}/{}/{number}/",
        base_url(lang),
        code.edition_num().to_lowercase()
    );
    let response = client.get(url).send().await?;
    response.error_for_status_ref()?;
    let (mut slug, inner) = parse_html(lang, code, response.text().await?)?;
    if let Some(override_slug) = override_slug {
        slug = override_slug.into()
    }
    Ok(CardInfo { slug, inner })
}

fn base_url(lang: Language) -> &'static str {
    match lang {
        Language::Es => "https://www.pokemon.com/el/jcc-pokemon/cartas-pokemon/series",
        Language::En => todo!(),
    }
}

fn parse_html(lang: Language, code: EditionCode, html: String) -> Result<(String, InnerCardInfo)> {
    let html = Html::parse_document(&html);
    let card = html
        .select(&selector("div.full-card-information")?)
        .next()
        .ok_or(anyhow!("Couldn't find card info"))?;
    let name = card
        .select(&selector("h1")?)
        .next()
        .ok_or(anyhow!("Failed to get card name"))?
        .inner_html();
    let (kind, card_type) = parse_card_type(
        lang,
        card.select(&selector("div.card-type > h2")?)
            .next()
            .ok_or(anyhow!("Failed to get card type"))?
            .inner_html(),
    )?;
    let slug = match kind {
        CardKind::Pokemon => slugify_pokemon(lang, code, &name),
        CardKind::Trainer | CardKind::Energy => slugify_unique(lang, &name),
    };
    let specific_info = match kind {
        CardKind::Pokemon => SpecificInfo::PokemonInfo {},
        CardKind::Trainer => {
            let effect = card
                .select(&selector("div.ability > pre > p")?)
                .map(|e| e.inner_html())
                .collect();
            SpecificInfo::TrainerInfo { effect }
        }
        CardKind::Energy => SpecificInfo::EnergyInfo {},
    };

    Ok((
        slug,
        InnerCardInfo {
            name,
            kind,
            card_type,
            acespec: false,
            tagteam: false,
            future: false,
            ancient: false,
            specific_info,
        },
    ))
}

fn selector(sel: &str) -> Result<Selector> {
    Selector::parse(sel).map_err(|_| anyhow!("failed to parse selector"))
}

fn parse_card_type(lang: Language, text: String) -> Result<(CardKind, CardType)> {
    let kind = if text.contains(trainer_pattern(lang)) || text.contains(tool_pattern(lang)) {
        Ok(CardKind::Trainer)
    } else if text.contains("Pokémon") {
        Ok(CardKind::Pokemon)
    } else if text.contains(energy_pattern(lang)) {
        Ok(CardKind::Energy)
    } else {
        Err(anyhow!(
            "Failed to get card kind (Pokemon, Trainer or Energy)"
        ))
    }?;

    let card_type = match kind {
        CardKind::Pokemon => {
            if text.contains(basic_pattern(lang)) {
                Ok(CardType::Basic)
            } else if text.contains(stage1_pattern(lang)) {
                Ok(CardType::Stage1)
            } else if text.contains(stage2_pattern(lang)) {
                Ok(CardType::Stage2)
            } else {
                Err(anyhow!("Failed to get Pokemon type: {text}"))
            }
        }
        CardKind::Trainer => {
            if text.contains(item_pattern(lang)) {
                Ok(CardType::Item)
            } else if text.contains(tool_pattern(lang)) {
                Ok(CardType::Tool)
            } else if text.contains(stadium_pattern(lang)) {
                Ok(CardType::Stadium)
            } else if text.contains(supporter_pattern(lang)) {
                Ok(CardType::Supporter)
            } else {
                Err(anyhow!("Failed to get Trainer type"))
            }
        }
        CardKind::Energy => {
            if text.contains(basic_pattern(lang)) {
                Ok(CardType::Basic)
            } else if text.contains(special_pattern(lang)) {
                Ok(CardType::Special)
            } else {
                Err(anyhow!("Failed to get Pokemon type"))
            }
        }
    }?;

    Ok((kind, card_type))
}

fn trainer_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Entrenador",
        Language::En => todo!(),
    }
}

fn energy_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Energía",
        Language::En => todo!(),
    }
}

fn basic_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Básic",
        Language::En => todo!(),
    }
}

fn stage1_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Fase 1",
        Language::En => todo!(),
    }
}

fn stage2_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Fase 2",
        Language::En => todo!(),
    }
}

fn item_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Objeto",
        Language::En => todo!(),
    }
}

fn tool_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Herramienta",
        Language::En => todo!(),
    }
}

fn supporter_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Partidario",
        Language::En => todo!(),
    }
}

fn stadium_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Estadio",
        Language::En => todo!(),
    }
}

fn special_pattern(lang: Language) -> &'static str {
    match lang {
        Language::Es => "Especial",
        Language::En => todo!(),
    }
}

fn slugify_pokemon(lang: Language, code: EditionCode, name: &str) -> String {
    format!("{}-{code}-{lang}", slugify(name))
}

fn slugify_unique(lang: Language, name: &str) -> String {
    format!("{}-{lang}", slugify(name))
}

fn slugify(name: &str) -> String {
    name.to_lowercase()
        .replace("'s", "")
        .replace(" ", "-")
        .replace("á", "a")
        .replace("é", "e")
        .replace("í", "i")
        .replace("ó", "o")
        .replace("ú", "u")
}