use once_cell::sync::Lazy;
use std::path::{Path, PathBuf};

use rocket::{
    fs::NamedFile,
    http::ContentType,
    response::{content::RawCss as Css, content::RawHtml as Html, Redirect},
    serde::json::Json,
    Catcher, Route,
};
use serde_json::Value;

use crate::{
    api::{core::now, ApiResult, EmptyResult},
    auth::decode_file_download,
    error::Error,
    util::{get_web_vault_version, Cached, SafeString},
    CONFIG,
};

pub fn routes() -> Vec<Route> {
    // If adding more routes here, consider also adding them to
    // crate::utils::LOGGED_ROUTES to make sure they appear in the log
    let mut routes = routes![attachments, alive, alive_head, static_files];
    if CONFIG.web_vault_enabled() {
        routes.append(&mut routes![web_index, web_index_direct, web_index_head, app_id, web_files, vaultwarden_css]);
    }

    #[cfg(debug_assertions)]
    if CONFIG.reload_templates() {
        routes.append(&mut routes![_static_files_dev]);
    }

    routes
}

pub fn catchers() -> Vec<Catcher> {
    if CONFIG.web_vault_enabled() {
        catchers![not_found]
    } else {
        catchers![]
    }
}

#[catch(404)]
fn not_found() -> ApiResult<Html<String>> {
    // Return the page
    let json = json!({
        "urlpath": CONFIG.domain_path()
    });
    let text = CONFIG.render_template("404", &json)?;
    Ok(Html(text))
}

#[get("/css/vaultwarden.css")]
fn vaultwarden_css() -> Cached<Css<String>> {
    // Configure the web-vault version as an integer so it can be used as a comparison smaller or greater then.
    // The default is based upon the version since this feature is added.
    static WEB_VAULT_VERSION: Lazy<u32> = Lazy::new(|| {
        let re = regex::Regex::new(r"(\d{4})\.(\d{1,2})\.(\d{1,2})").unwrap();
        let vault_version = get_web_vault_version();

        let (major, minor, patch) = match re.captures(&vault_version) {
            Some(c) if c.len() == 4 => (
                c.get(1).unwrap().as_str().parse().unwrap(),
                c.get(2).unwrap().as_str().parse().unwrap(),
                c.get(3).unwrap().as_str().parse().unwrap(),
            ),
            _ => (2024, 6, 2),
        };
        format!("{major}{minor:02}{patch:02}").parse::<u32>().unwrap()
    });

    // Configure the Vaultwarden version as an integer so it can be used as a comparison smaller or greater then.
    // The default is based upon the version since this feature is added.
    static VW_VERSION: Lazy<u32> = Lazy::new(|| {
        let re = regex::Regex::new(r"(\d{1})\.(\d{1,2})\.(\d{1,2})").unwrap();
        let vw_version = crate::VERSION.unwrap_or("1.32.1");

        let (major, minor, patch) = match re.captures(vw_version) {
            Some(c) if c.len() == 4 => (
                c.get(1).unwrap().as_str().parse().unwrap(),
                c.get(2).unwrap().as_str().parse().unwrap(),
                c.get(3).unwrap().as_str().parse().unwrap(),
            ),
            _ => (1, 32, 1),
        };
        format!("{major}{minor:02}{patch:02}").parse::<u32>().unwrap()
    });

    let css_options = json!({
        "web_vault_version": *WEB_VAULT_VERSION,
        "vw_version": *VW_VERSION,
        "signup_disabled": !CONFIG.signups_allowed() && CONFIG.signups_domains_whitelist().is_empty(),
        "mail_enabled": CONFIG.mail_enabled(),
        "yubico_enabled": CONFIG._enable_yubico() && (CONFIG.yubico_client_id().is_some() == CONFIG.yubico_secret_key().is_some()),
        "emergency_access_allowed": CONFIG.emergency_access_allowed(),
        "sends_allowed": CONFIG.sends_allowed(),
        "load_user_scss": true,
    });

    let scss = match CONFIG.render_template("scss/vaultwarden.scss", &css_options) {
        Ok(t) => t,
        Err(e) => {
            // Something went wrong loading the template. Use the fallback
            warn!("Loading scss/vaultwarden.scss.hbs or scss/user.vaultwarden.scss.hbs failed. {e}");
            CONFIG
                .render_fallback_template("scss/vaultwarden.scss", &css_options)
                .expect("Fallback scss/vaultwarden.scss.hbs to render")
        }
    };

    let css = match grass_compiler::from_string(
        scss,
        &grass_compiler::Options::default().style(grass_compiler::OutputStyle::Compressed),
    ) {
        Ok(css) => css,
        Err(e) => {
            // Something went wrong compiling the scss. Use the fallback
            warn!("Compiling the Vaultwarden SCSS styles failed. {e}");
            let mut css_options = css_options;
            css_options["load_user_scss"] = json!(false);
            let scss = CONFIG
                .render_fallback_template("scss/vaultwarden.scss", &css_options)
                .expect("Fallback scss/vaultwarden.scss.hbs to render");
            grass_compiler::from_string(
                scss,
                &grass_compiler::Options::default().style(grass_compiler::OutputStyle::Compressed),
            )
            .expect("SCSS to compile")
        }
    };

    // Cache for one day should be enough and not too much
    Cached::ttl(Css(css), 86_400, false)
}

#[get("/")]
async fn web_index() -> Cached<Option<NamedFile>> {
    Cached::short(NamedFile::open(Path::new(&CONFIG.web_vault_folder()).join("index.html")).await.ok(), false)
}

// Make sure that `/index.html` redirect to actual domain path.
// If not, this might cause issues with the web-vault
#[get("/index.html")]
fn web_index_direct() -> Redirect {
    Redirect::to(format!("{}/", CONFIG.domain_path()))
}

#[head("/")]
fn web_index_head() -> EmptyResult {
    // Add an explicit HEAD route to prevent uptime monitoring services from
    // generating "No matching routes for HEAD /" error messages.
    //
    // Rocket automatically implements a HEAD route when there's a matching GET
    // route, but relying on this behavior also means a spurious error gets
    // logged due to <https://github.com/SergioBenitez/Rocket/issues/1098>.
    Ok(())
}

#[get("/app-id.json")]
fn app_id() -> Cached<(ContentType, Json<Value>)> {
    let content_type = ContentType::new("application", "fido.trusted-apps+json");

    Cached::long(
        (
            content_type,
            Json(json!({
            "trustedFacets": [
                {
                "version": { "major": 1, "minor": 0 },
                "ids": [
                    // Per <https://fidoalliance.org/specs/fido-v2.0-id-20180227/fido-appid-and-facets-v2.0-id-20180227.html#determining-the-facetid-of-a-calling-application>:
                    //
                    // "In the Web case, the FacetID MUST be the Web Origin [RFC6454]
                    // of the web page triggering the FIDO operation, written as
                    // a URI with an empty path. Default ports are omitted and any
                    // path component is ignored."
                    //
                    // This leaves it unclear as to whether the path must be empty,
                    // or whether it can be non-empty and will be ignored. To be on
                    // the safe side, use a proper web origin (with empty path).
                    &CONFIG.domain_origin(),
                    "ios:bundle-id:com.8bit.bitwarden",
                    "android:apk-key-hash:dUGFzUzf3lmHSLBDBIv+WaFyZMI" ]
                }]
            })),
        ),
        true,
    )
}

#[get("/<p..>", rank = 10)] // Only match this if the other routes don't match
async fn web_files(p: PathBuf) -> Cached<Option<NamedFile>> {
    Cached::long(NamedFile::open(Path::new(&CONFIG.web_vault_folder()).join(p)).await.ok(), true)
}

#[get("/attachments/<uuid>/<file_id>?<token>")]
async fn attachments(uuid: SafeString, file_id: SafeString, token: String) -> Option<NamedFile> {
    let Ok(claims) = decode_file_download(&token) else {
        return None;
    };
    if claims.sub != *uuid || claims.file_id != *file_id {
        return None;
    }

    NamedFile::open(Path::new(&CONFIG.attachments_folder()).join(uuid).join(file_id)).await.ok()
}

// We use DbConn here to let the alive healthcheck also verify the database connection.
use crate::db::DbConn;
#[get("/alive")]
fn alive(_conn: DbConn) -> Json<String> {
    now()
}

#[head("/alive")]
fn alive_head(_conn: DbConn) -> EmptyResult {
    // Avoid logging spurious "No matching routes for HEAD /alive" errors
    // due to <https://github.com/SergioBenitez/Rocket/issues/1098>.
    Ok(())
}

// This endpoint/function is used during development and development only.
// It allows to easily develop the admin interface by always loading the files from disk instead from a slice of bytes
// This will only be active during a debug build and only when `RELOAD_TEMPLATES` is set to `true`
// NOTE: Do not forget to add any new files added to the `static_files` function below!
#[cfg(debug_assertions)]
#[get("/vw_static/<filename>", rank = 1)]
pub async fn _static_files_dev(filename: PathBuf) -> Option<NamedFile> {
    warn!("LOADING STATIC FILES FROM DISK");
    let file = filename.to_str().unwrap_or_default();
    let ext = filename.extension().unwrap_or_default();

    let path = if ext == "png" || ext == "svg" {
        tokio::fs::canonicalize(Path::new(file!()).parent().unwrap().join("../static/images/").join(file)).await
    } else {
        tokio::fs::canonicalize(Path::new(file!()).parent().unwrap().join("../static/scripts/").join(file)).await
    };

    if let Ok(path) = path {
        return NamedFile::open(path).await.ok();
    };
    None
}

#[get("/vw_static/<filename>", rank = 2)]
pub fn static_files(filename: &str) -> Result<(ContentType, &'static [u8]), Error> {
    match filename {
        "404.png" => Ok((ContentType::PNG, include_bytes!("../static/images/404.png"))),
        "mail-github.png" => Ok((ContentType::PNG, include_bytes!("../static/images/mail-github.png"))),
        "logo-gray.png" => Ok((ContentType::PNG, include_bytes!("../static/images/logo-gray.png"))),
        "error-x.svg" => Ok((ContentType::SVG, include_bytes!("../static/images/error-x.svg"))),
        "hibp.png" => Ok((ContentType::PNG, include_bytes!("../static/images/hibp.png"))),
        "vaultwarden-icon.png" => Ok((ContentType::PNG, include_bytes!("../static/images/vaultwarden-icon.png"))),
        "vaultwarden-favicon.png" => Ok((ContentType::PNG, include_bytes!("../static/images/vaultwarden-favicon.png"))),
        "404.css" => Ok((ContentType::CSS, include_bytes!("../static/scripts/404.css"))),
        "admin.css" => Ok((ContentType::CSS, include_bytes!("../static/scripts/admin.css"))),
        "admin.js" => Ok((ContentType::JavaScript, include_bytes!("../static/scripts/admin.js"))),
        "admin_settings.js" => Ok((ContentType::JavaScript, include_bytes!("../static/scripts/admin_settings.js"))),
        "admin_users.js" => Ok((ContentType::JavaScript, include_bytes!("../static/scripts/admin_users.js"))),
        "admin_organizations.js" => {
            Ok((ContentType::JavaScript, include_bytes!("../static/scripts/admin_organizations.js")))
        }
        "admin_diagnostics.js" => {
            Ok((ContentType::JavaScript, include_bytes!("../static/scripts/admin_diagnostics.js")))
        }
        "bootstrap.css" => Ok((ContentType::CSS, include_bytes!("../static/scripts/bootstrap.css"))),
        "bootstrap.bundle.js" => Ok((ContentType::JavaScript, include_bytes!("../static/scripts/bootstrap.bundle.js"))),
        "jdenticon-3.3.0.js" => Ok((ContentType::JavaScript, include_bytes!("../static/scripts/jdenticon-3.3.0.js"))),
        "datatables.js" => Ok((ContentType::JavaScript, include_bytes!("../static/scripts/datatables.js"))),
        "datatables.css" => Ok((ContentType::CSS, include_bytes!("../static/scripts/datatables.css"))),
        "jquery-3.7.1.slim.js" => {
            Ok((ContentType::JavaScript, include_bytes!("../static/scripts/jquery-3.7.1.slim.js")))
        }
        _ => err!(format!("Static file not found: {filename}")),
    }
}