use crate::{
  error::*,
  logic::plain_parse,
  models::{
    GrandCompany,
    character::{
      Character,
      CityState,
      Gender,
      GrandCompanyInfo,
    },
  }
};

use ffxiv_types::{World, Race, Clan, Guardian};

use scraper::Html;

use std::str::FromStr;

selectors!(
  PROFILE_NAME => ".frame__chara__name";
  PROFILE_WORLD => ".frame__chara__world";
  PROFILE_TITLE => ".frame__chara__title";
  PROFILE_NAME_DAY => ".character-block__birth";
  PROFILE_RACE_CLAN_GENDER => "div.character-block:nth-of-type(1) > .character-block__box > .character-block__name";
  PROFILE_GUARDIAN => "div.character-block:nth-of-type(2) > .character-block__box > .character-block__name";
  PROFILE_CITY_STATE => "div.character-block:nth-of-type(3) > .character-block__box > .character-block__name";
  PROFILE_GRAND_COMPANY => "div.character-block:nth-of-type(4) > .character-block__box > .character-block__name";
  PROFILE_FREE_COMPANY => ".character__freecompany__name > h4 > a";
  PROFILE_TEXT => ".character__selfintroduction";
);

pub fn parse(id: u64, html: &str) -> Result<Character> {
  let html = Html::parse_document(html);

  let name = plain_parse(&html, &*PROFILE_NAME)?;
  let world = parse_world(&html)?;
  let title = parse_title(&html);
  let (race, clan, gender) = parse_rcg(&html)?;

  let name_day = plain_parse(&html, &*PROFILE_NAME_DAY)?;
  let guardian = parse_guardian(&html)?;

  let city_state = parse_city_state(&html)?;

  let grand_company = parse_grand_company(&html)?;

  let free_company_id = parse_free_company_id(&html)?;

  let profile_text = plain_parse(&html, &*PROFILE_TEXT)?.trim().to_string();

  Ok(Character {
    id,
    name,
    world,
    race,
    clan,
    gender,
    title,
    name_day,
    guardian,
    city_state,
    grand_company,
    free_company_id,
    profile_text,
  })
}

fn parse_world(html: &Html) -> Result<World> {
  let world_str = plain_parse(&html, &*PROFILE_WORLD)?;
  World::from_str(&world_str)
    .map_err(|_| Error::invalid_content("valid world", Some(&world_str)))
}

fn parse_title(html: &Html) -> Option<String> {
  html
    .select(&*PROFILE_TITLE)
    .next()
    .map(|x| x.text().collect())
}

fn parse_rcg(html: &Html) -> Result<(Race, Clan, Gender)> {
  let mut rcg = html
    .select(&*PROFILE_RACE_CLAN_GENDER)
    .next()
    .ok_or_else(|| Error::missing_element(&*PROFILE_RACE_CLAN_GENDER))?
    .text();

  let race_str = rcg
    .next()
    .ok_or_else(|| Error::invalid_content("first of two parts in race/gender", None))?;
  let race = Race::from_str(race_str)
    .map_err(|_| Error::invalid_content("valid race", Some(race_str)))?;

  let clan_gender_str = rcg
    .next()
    .ok_or_else(|| Error::invalid_content("second of two parts in race/gender", None))?;
  let mut clan_gender_split = clan_gender_str.split(" / ");

  let clan_str = clan_gender_split
    .next()
    .ok_or_else(|| Error::invalid_content("clan/gender split by `/`", Some(clan_gender_str)))?;
  let clan = Clan::from_str(clan_str)
    .map_err(|_| Error::invalid_content("valid clan", Some(clan_str)))?;

  let gender_str = clan_gender_split
    .next()
    .ok_or_else(|| Error::invalid_content("clan/gender split by `/`", Some(clan_gender_str)))?;
  let gender = Gender::parse(gender_str)
    .ok_or_else(|| Error::invalid_content("valid gender", Some(gender_str)))?;

  Ok((race, clan, gender))
}

fn parse_guardian(html: &Html) -> Result<Guardian> {
  let guardian_str = plain_parse(&html, &*PROFILE_GUARDIAN)?;
  guardian_str
    .split(",")
    .next()
    .ok_or_else(|| Error::invalid_content("first part of guardian", Some(&guardian_str)))
    .and_then(|x| Guardian::from_str(&x)
      .map_err(|_| Error::invalid_content("valid guardian", Some(&guardian_str))))
}

fn parse_city_state(html: &Html) -> Result<CityState> {
  let city_state_str = plain_parse(&html, &*PROFILE_CITY_STATE)?;
  CityState::parse(&city_state_str)
    .ok_or_else(|| Error::invalid_content("valid city-state", Some(&city_state_str)))
}

fn parse_grand_company(html: &Html) -> Result<Option<GrandCompanyInfo>> {
  let text = html
    .select(&*PROFILE_GRAND_COMPANY)
    .next()
    .map(|x| x.text().collect::<String>());
  let text = match text {
    Some(t) => t,
    None => return Ok(None),
  };
  let mut x = text.split(" / ");
  let gc_str = x
    .next()
    .ok_or_else(|| Error::invalid_content("gc/rank separated by `/`", Some(&text)))?;
  let grand_company = GrandCompany::parse(gc_str)
    .ok_or_else(|| Error::invalid_content("valid grand company", Some(&text)))?;
  let rank = x
    .next()
    .ok_or_else(|| Error::invalid_content("gc/rank separated by `/`", Some(&text)))?
    .to_string();
  Ok(Some(GrandCompanyInfo {
    grand_company,
    rank,
  }))
}

fn parse_free_company_id(html: &Html) -> Result<Option<u64>> {
  let elem = match html
    .select(&*PROFILE_FREE_COMPANY)
    .next()
  {
    Some(e) => e,
    None => return Ok(None),
  };
  let href = elem.value().attr("href").ok_or_else(|| Error::invalid_content("href on FC link", None))?;
  let last = href
    .split('/')
    .filter(|x| !x.is_empty())
    .last()
    .ok_or_else(|| Error::invalid_content("href separated by `/`", Some(&href)))?;
  last.parse().map(Some).map_err(Error::InvalidNumber)
}