use anyhow::{anyhow, bail, Result};
use async_trait::async_trait;
use cookie::Cookie;
use indoc::indoc;
use url::Host;

use crate::newspaper::{Metadata, Newspaper};
use crate::tools;
use crate::Url;
use crate::{Download, Downloader};

pub enum Login {
    Username(String, String),
    Cookies { lmd_a_m: String, ssess: String },
}

#[derive(Debug, Clone, Default)]
pub struct CourrierInternational {
    login_cookies: Vec<(String, String)>,
}

fn str_to_host<S: Into<String>>(host: S) -> Host {
    Host::Domain(host.into())
}

#[derive(Debug, Clone, Default)]
pub struct Builder {
    login_cookies: Option<Vec<(String, String)>>,
}

impl Builder {
    pub fn login(&mut self, login: Login) -> &mut Self {
        self.login_cookies = match login {
            Login::Username(_username, _password) => {
                unimplemented!("login using username and passwond not implemented")
            }
            Login::Cookies { lmd_a_m, ssess } => Some(vec![
                ("lmd_a_m".into(), lmd_a_m),
                ("SSESS862c7003d721c672d39f161b1456b890".into(), ssess),
            ]),
        };
        self
    }

    pub fn build(&self) -> Result<CourrierInternational> {
        match &self.login_cookies {
            Some(login_cookies) => Ok(CourrierInternational {
                login_cookies: login_cookies.clone(),
            }),
            None => Err(anyhow!("You have to log in to access this newspaper")),
        }
    }
}

#[async_trait]
impl Newspaper for CourrierInternational {
    fn metadata(&self) -> Metadata {
        Metadata::builder()
            .hosts(vec![
                str_to_host("courrierinternational.com"),
                str_to_host("www.courrierinternational.com"),
            ])
            .lower_case_name("courrier-international")
            .name("Courrier international")
            .build()
            .unwrap_or_default()
    }

    async fn retrieve_html(&self, url: &Url) -> Result<String> {
        let cookies = self
            .login_cookies
            .iter()
            .map(|cookie| Cookie::build(&cookie.0, &cookie.1).finish())
            .collect::<Vec<_>>();

        // TODO: replace by builder
        let downloader = Downloader { cookies };

        let body = downloader.download(&url).await?;
        let html = match body {
            Some(body) => String::from_utf8(body.to_vec())?,
            None => bail!("404 not found"),
        };

        let elements_to_remove = &[
            // navigation elements
            "header.site-header",
            "footer.site-footer",
            // Social buttons
            "#toolbox-share",
            ".toolbox-share",
            ".toolbox-print",
            ".toolbox-respond",
            ".toolbox-zen",
            ".toolbox-newsletter",
            ".toolbox-offer",
            ".box-article-offer-friend-abo",
            // unused services
            ".article-aside",
            ".article-secondary",
            ".article-subject-readmore",
            // misc
            ".element-invisible",
            ".gptcontainer",
        ];

        // FIXME: it doesn't work because the aside is in the article body
        //
        let toolbox_style = indoc! {"
            aside.article-toolbox {
                position: sticky;
                top: 1em;
            }
       "};

        let single_page_html = tools::self_contained_html::Config {
            downloader: Some(&downloader),
            base_url: Some(&url),
            elements_to_remove,
            styles_to_add: &[toolbox_style],
            ..Default::default()
        }
        .run(&html)
        .await;
        Ok(single_page_html)
    }

    fn new() -> Self {
        Self {
            ..Default::default()
        }
    }

    async fn has_complete_access(&self) -> bool {
        // TODO:  check if we are logged using the cookie
        true
    }
}

impl CourrierInternational {
    pub fn builder() -> Builder {
        Builder::default()
    }
}