include!("preferences_columns.rs");

fn default_admin_theme() -> String {
    "dark".to_owned()
}
fn default_admin_language() -> String {
    "auto".to_owned()
}
fn default_admin_ui_scale() -> u16 {
    100
}
fn default_admin_time_format() -> String {
    "24h".to_owned()
}
fn default_admin_chart_style() -> String {
    "default".to_owned()
}
fn default_admin_button_style() -> String {
    "normal".to_owned()
}
fn default_admin_table_density() -> String {
    "normal".to_owned()
}
fn default_admin_dashboard_density() -> String {
    "compact".to_owned()
}
fn default_admin_dashboard_widgets() -> Vec<String> {
    DASHBOARD_WIDGETS
        .iter()
        .map(|value| (*value).to_owned())
        .collect()
}
fn default_file_log_sort() -> String { "time".to_owned() }
fn default_file_log_descending() -> bool { true }
fn default_file_log_columns() -> Vec<String> {
    [
        "time",
        "event",
        "status",
        "client_ip",
        "vhost",
        "record",
        "source",
    ]
    .into_iter()
    .map(str::to_owned)
    .collect()
}
fn default_backend_table_columns() -> Vec<String> {
    BACKEND_TABLE_COLUMNS
        .iter()
        .map(|value| (*value).to_owned())
        .collect()
}
fn default_backend_table_sort() -> String {
    "vhost".to_owned()
}
fn default_vhost_list_sort() -> String {
    "id".to_owned()
}
fn default_docker_vhost_sort() -> String {
    "service".to_owned()
}
fn default_redirect_list_sort() -> String {
    "id".to_owned()
}
fn default_notfound_list_sort() -> String {
    "id".to_owned()
}
fn default_stream_list_sort() -> String {
    "name".to_owned()
}

include!("refresh_preferences.rs");
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
struct AdminPreferences {
    #[serde(default)]
    refresh: RefreshPreferences,
    #[serde(default = "default_live_log_columns")]
    live_log_columns: Vec<String>,
    #[serde(default = "default_admin_theme")]
    theme: String,
    #[serde(default = "default_admin_language")]
    language: String,
    #[serde(default = "default_admin_ui_scale")]
    ui_scale: u16,
    #[serde(default = "default_admin_time_format")]
    time_format: String,
    #[serde(default = "default_admin_chart_style")]
    chart_style: String,
    #[serde(default = "default_admin_button_style")]
    button_style: String,
    #[serde(default = "default_admin_table_density")]
    table_density: String,
    #[serde(default = "default_admin_dashboard_density")]
    dashboard_density: String,
    #[serde(default = "default_admin_dashboard_widgets")]
    dashboard_widgets: Vec<String>,
    #[serde(default)]
    dashboard_hidden_widgets: Vec<String>,
    #[serde(default = "default_file_log_columns")]
    file_log_columns: Vec<String>,
    #[serde(default = "default_file_log_sort")]
    file_log_sort: String,
    #[serde(default = "default_file_log_descending")]
    file_log_descending: bool,
    #[serde(default = "default_backend_table_columns")]
    backend_table_columns: Vec<String>,
    #[serde(default = "default_backend_table_sort")]
    backend_table_sort: String,
    #[serde(default)]
    backend_table_descending: bool,
    #[serde(default = "default_vhost_list_sort")]
    vhost_list_sort: String,
    #[serde(default)]
    vhost_list_descending: bool,
    #[serde(default = "default_docker_vhost_sort")]
    docker_vhost_sort: String,
    #[serde(default)]
    docker_vhost_descending: bool,
    #[serde(default = "default_redirect_list_sort")]
    redirect_list_sort: String,
    #[serde(default)]
    redirect_list_descending: bool,
    #[serde(default = "default_notfound_list_sort")]
    notfound_list_sort: String,
    #[serde(default)]
    notfound_list_descending: bool,
    #[serde(default = "default_stream_list_sort")]
    stream_list_sort: String,
    #[serde(default)]
    stream_list_descending: bool,
}

impl Default for AdminPreferences {
    fn default() -> Self {
        Self {
            refresh: RefreshPreferences::default(),
            live_log_columns: LIVE_LOG_COLUMNS
                .iter()
                .map(|value| (*value).to_owned())
                .collect(),
            theme: default_admin_theme(),
            language: default_admin_language(),
            ui_scale: default_admin_ui_scale(),
            time_format: default_admin_time_format(),
            chart_style: default_admin_chart_style(),
            button_style: default_admin_button_style(),
            table_density: default_admin_table_density(),
            dashboard_density: default_admin_dashboard_density(),
            dashboard_widgets: default_admin_dashboard_widgets(),
            dashboard_hidden_widgets: Vec::new(),
            file_log_columns: default_file_log_columns(),
            file_log_sort: default_file_log_sort(),
            file_log_descending: default_file_log_descending(),
            backend_table_columns: default_backend_table_columns(),
            backend_table_sort: default_backend_table_sort(),
            backend_table_descending: false,
            vhost_list_sort: default_vhost_list_sort(),
            vhost_list_descending: false,
            docker_vhost_sort: default_docker_vhost_sort(),
            docker_vhost_descending: false,
            redirect_list_sort: default_redirect_list_sort(),
            redirect_list_descending: false,
            notfound_list_sort: default_notfound_list_sort(),
            notfound_list_descending: false,
            stream_list_sort: default_stream_list_sort(),
            stream_list_descending: false,
        }
    }
}

fn validate_admin_preferences(preferences: &AdminPreferences) -> Result<(), ApiError> {
    validate_refresh_preferences(&preferences.refresh)?;
    if preferences.live_log_columns.is_empty()
        || preferences.live_log_columns.len() > LIVE_LOG_COLUMNS.len()
    {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "at least one live-log column must be visible".into(),
        ));
    }
    let mut seen = std::collections::HashSet::new();
    for column in &preferences.live_log_columns {
        if !LIVE_LOG_COLUMNS.contains(&column.as_str()) || !seen.insert(column.as_str()) {
            return Err(ApiError(
                StatusCode::UNPROCESSABLE_ENTITY,
                "invalid live-log column preference".into(),
            ));
        }
    }
    if preferences.file_log_columns.is_empty()
        || preferences.file_log_columns.len() > FILE_LOG_COLUMN_MAX
    {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "at least one stored-log column must be visible".into(),
        ));
    }
    let mut seen = std::collections::HashSet::new();
    for column in &preferences.file_log_columns {
        if column.is_empty()
            || column.len() > 128
            || column.chars().any(char::is_control)
            || !seen.insert(column.as_str())
        {
            return Err(ApiError(
                StatusCode::UNPROCESSABLE_ENTITY,
                "invalid stored-log column preference".into(),
            ));
        }
    }
    if !valid_raw_field_key(&preferences.file_log_sort) {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid stored-log sort column preference".into(),
        ));
    }
    if !matches!(preferences.theme.as_str(), "dark" | "light") {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration theme preference".into(),
        ));
    }
    if preferences.language != "auto"
        && (preferences.language.is_empty()
            || preferences.language.len() > 64
            || !preferences
                .language
                .chars()
                .all(|value| value.is_ascii_alphanumeric() || matches!(value, '_' | '-')))
    {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration language preference".into(),
        ));
    }
    if !(70..=125).contains(&preferences.ui_scale) {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration interface scale preference".into(),
        ));
    }
    if !matches!(preferences.time_format.as_str(), "24h" | "12h") {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration time format preference".into(),
        ));
    }
    if !matches!(
        preferences.chart_style.as_str(),
        "default"
            | "soft"
            | "technical"
            | "high_contrast"
            | "neon"
            | "monochrome"
            | "warm"
            | "cool"
    ) {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration chart style preference".into(),
        ));
    }
    if !matches!(preferences.button_style.as_str(), "normal" | "compact") {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration button style preference".into(),
        ));
    }
    if !matches!(
        preferences.table_density.as_str(),
        "normal" | "compact" | "ultra"
    ) {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration table density preference".into(),
        ));
    }
    if !matches!(
        preferences.dashboard_density.as_str(),
        "normal" | "compact" | "ultra"
    ) {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration dashboard density preference".into(),
        ));
    }
    if preferences.dashboard_widgets.is_empty()
        || preferences.dashboard_widgets.len() > DASHBOARD_WIDGETS.len()
    {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration dashboard widget order".into(),
        ));
    }
    let mut seen = std::collections::HashSet::new();
    for widget in &preferences.dashboard_widgets {
        if !DASHBOARD_WIDGETS.contains(&widget.as_str()) || !seen.insert(widget.as_str()) {
            return Err(ApiError(
                StatusCode::UNPROCESSABLE_ENTITY,
                "invalid administration dashboard widget order".into(),
            ));
        }
    }
    if preferences.dashboard_hidden_widgets.len() > DASHBOARD_WIDGETS.len() {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid administration hidden dashboard widgets".into(),
        ));
    }
    let mut seen = std::collections::HashSet::new();
    for widget in &preferences.dashboard_hidden_widgets {
        if !DASHBOARD_WIDGETS.contains(&widget.as_str()) || !seen.insert(widget.as_str()) {
            return Err(ApiError(
                StatusCode::UNPROCESSABLE_ENTITY,
                "invalid administration hidden dashboard widgets".into(),
            ));
        }
    }
    if preferences.backend_table_columns.is_empty()
        || preferences.backend_table_columns.len() > BACKEND_TABLE_COLUMNS.len()
    {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "at least one backend table column must be visible".into(),
        ));
    }
    let mut seen = std::collections::HashSet::new();
    for column in &preferences.backend_table_columns {
        if !BACKEND_TABLE_COLUMNS.contains(&column.as_str()) || !seen.insert(column.as_str()) {
            return Err(ApiError(
                StatusCode::UNPROCESSABLE_ENTITY,
                "invalid backend table column preference".into(),
            ));
        }
    }
    if !BACKEND_TABLE_COLUMNS.contains(&preferences.backend_table_sort.as_str()) {
        return Err(ApiError(
            StatusCode::UNPROCESSABLE_ENTITY,
            "invalid backend table sort preference".into(),
        ));
    }
    for (value, allowed, message) in [
        (
            &preferences.vhost_list_sort,
            VHOST_LIST_SORT_COLUMNS,
            "invalid vhost list sort preference",
        ),
        (
            &preferences.docker_vhost_sort,
            DOCKER_VHOST_SORT_COLUMNS,
            "invalid Docker vhost sort preference",
        ),
        (
            &preferences.redirect_list_sort,
            REDIRECT_LIST_SORT_COLUMNS,
            "invalid redirect list sort preference",
        ),
        (
            &preferences.notfound_list_sort,
            NOTFOUND_LIST_SORT_COLUMNS,
            "invalid 404-host sort preference",
        ),
        (
            &preferences.stream_list_sort,
            STREAM_LIST_SORT_COLUMNS,
            "invalid stream list sort preference",
        ),
    ] {
        if !allowed.contains(&value.as_str()) {
            return Err(ApiError(StatusCode::UNPROCESSABLE_ENTITY, message.into()));
        }
    }
    Ok(())
}

async fn preferences(
    State(state): State<Arc<App>>,
    Extension(session): Extension<Session>,
) -> Result<Json<AdminPreferences>, ApiError> {
    let stored = state
        .store
        .admin_preferences(&session.username)
        .await
        .map_err(auth::internal)?;
    let preferences = match stored {
        Some(document) => match serde_json::from_str::<AdminPreferences>(&document) {
            Ok(preferences) if validate_admin_preferences(&preferences).is_ok() => preferences,
            Ok(_) | Err(_) => {
                tracing::warn!(user = %session.username, "invalid admin view preferences ignored");
                AdminPreferences::default()
            }
        },
        None => AdminPreferences::default(),
    };
    Ok(Json(preferences))
}

async fn update_preferences(
    State(state): State<Arc<App>>,
    Extension(session): Extension<Session>,
    input: Result<Json<AdminPreferences>, axum::extract::rejection::JsonRejection>,
) -> Result<Json<AdminPreferences>, ApiError> {
    let Json(preferences) = input.map_err(public::invalid_json)?;
    validate_admin_preferences(&preferences)?;
    let document = serde_json::to_string(&preferences).map_err(auth::internal)?;
    if !state
        .store
        .save_admin_preferences(&session.username, &document)
        .await
        .map_err(auth::internal)?
    {
        return Err(ApiError(
            StatusCode::UNAUTHORIZED,
            "auth.invalid_credentials".into(),
        ));
    }
    Ok(Json(preferences))
}