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// Copyright 2024 New Vector Ltd.
// Copyright 2021-2024 The Matrix.org Foundation C.I.C.
//
// SPDX-License-Identifier: AGPL-3.0-only
// Please see LICENSE in the repository root for full details.

use axum::{
    extract::State,
    response::{Html, IntoResponse},
};
use mas_axum_utils::{cookies::CookieJar, csrf::CsrfExt, FancyError, SessionInfoExt};
use mas_router::UrlBuilder;
use mas_storage::{BoxClock, BoxRepository, BoxRng};
use mas_templates::{IndexContext, TemplateContext, Templates};

use crate::{preferred_language::PreferredLanguage, BoundActivityTracker};

#[tracing::instrument(name = "handlers.views.index.get", skip_all, err)]
pub async fn get(
    mut rng: BoxRng,
    clock: BoxClock,
    activity_tracker: BoundActivityTracker,
    State(templates): State<Templates>,
    State(url_builder): State<UrlBuilder>,
    mut repo: BoxRepository,
    cookie_jar: CookieJar,
    PreferredLanguage(locale): PreferredLanguage,
) -> Result<impl IntoResponse, FancyError> {
    let (csrf_token, cookie_jar) = cookie_jar.csrf_token(&clock, &mut rng);
    let (session_info, cookie_jar) = cookie_jar.session_info();
    let session = session_info.load_session(&mut repo).await?;

    if let Some(session) = session.as_ref() {
        activity_tracker
            .record_browser_session(&clock, session)
            .await;
    }

    let ctx = IndexContext::new(url_builder.oidc_discovery())
        .maybe_with_session(session)
        .with_csrf(csrf_token.form_value())
        .with_language(locale);

    let content = templates.render_index(&ctx)?;

    Ok((cookie_jar, Html(content)))
}