/*
 * Copyright (C) 2026 Mateusz Gruszczyński @linuxiarz.pl
 * Source-Available Code / Dual-Licensed.
 *
 * Free for non-commercial and evaluation use under terms of BSL/GPLv3.
 * Commercial or production use requires a valid paid license.
 * See LICENSE file in repository root for details.
 */

use super::*;

#[derive(Debug, Clone, Serialize)]
pub struct EditorPreferences {
    pub compact_view: bool,
    pub editor_line_numbers: bool,
    pub preview_line_numbers: bool,
    pub line_links: bool,
    pub toolbar_collapsed: bool,
    pub navbar_collapsed: bool,
    pub font_family: String,
    pub font_size: i64,
}

impl Default for EditorPreferences {
    fn default() -> Self {
        Self {
            compact_view: true,
            editor_line_numbers: true,
            preview_line_numbers: false,
            line_links: false,
            toolbar_collapsed: false,
            navbar_collapsed: false,
            font_family: "mono".into(),
            font_size: 14,
        }
    }
}

#[derive(Debug, Clone, Serialize)]
pub struct ResourceEditorSettings {
    pub authorship_mode: String,
    pub colors_enabled: bool,
}

impl Default for ResourceEditorSettings {
    fn default() -> Self {
        Self {
            authorship_mode: "simple".into(),
            colors_enabled: true,
        }
    }
}

#[derive(Debug, Clone, Copy)]
pub enum EditorPreferenceResource {
    Pad(i64),
    Note(i64),
}

fn preference_select_query(resource: EditorPreferenceResource) -> queries::Query {
    match resource {
        EditorPreferenceResource::Pad(_) => queries::EDITOR_PREFERENCES_SELECT_PAD,
        EditorPreferenceResource::Note(_) => queries::EDITOR_PREFERENCES_SELECT_NOTE,
    }
}

fn preference_upsert_query(resource: EditorPreferenceResource) -> queries::Query {
    match resource {
        EditorPreferenceResource::Pad(_) => queries::EDITOR_PREFERENCES_UPSERT_PAD,
        EditorPreferenceResource::Note(_) => queries::EDITOR_PREFERENCES_UPSERT_NOTE,
    }
}

fn resource_id(resource: EditorPreferenceResource) -> i64 {
    match resource {
        EditorPreferenceResource::Pad(id) | EditorPreferenceResource::Note(id) => id,
    }
}

pub async fn load_editor_preferences(
    pool: &Database,
    user_id: i64,
    resource: EditorPreferenceResource,
) -> Result<Option<EditorPreferences>, sqlx::Error> {
    let Some(row) = sqlx::query(queries::get(pool.kind(), preference_select_query(resource)))
        .bind(user_id)
        .bind(resource_id(resource))
        .fetch_optional(pool.pool())
        .await?
    else {
        return Ok(None);
    };

    Ok(Some(EditorPreferences {
        compact_view: row.try_get::<i64, _>(0)? != 0,
        editor_line_numbers: row.try_get::<i64, _>(1)? != 0,
        preview_line_numbers: row.try_get::<i64, _>(2)? != 0,
        line_links: row.try_get::<i64, _>(3)? != 0,
        toolbar_collapsed: row.try_get::<i64, _>(4)? != 0,
        navbar_collapsed: row.try_get::<i64, _>(5)? != 0,
        font_family: crate::row_decode::text(&row, 6)?,
        font_size: row.try_get(7)?,
    }))
}

pub async fn save_editor_configuration(
    pool: &Database,
    user_id: Option<i64>,
    resource: EditorPreferenceResource,
    preferences: Option<&EditorPreferences>,
    resource_settings: Option<(&str, &str, &ResourceEditorSettings)>,
) -> Result<(), sqlx::Error> {
    let mut tx = pool.pool().begin().await?;

    if let Some(preferences) = preferences {
        let user_id = user_id.ok_or_else(|| {
            sqlx::Error::Protocol("user id is required for personal editor preferences".into())
        })?;
        sqlx::query(queries::get(pool.kind(), preference_upsert_query(resource)))
            .bind(user_id)
            .bind(resource_id(resource))
            .bind(preferences.compact_view)
            .bind(preferences.editor_line_numbers)
            .bind(preferences.preview_line_numbers)
            .bind(preferences.line_links)
            .bind(preferences.toolbar_collapsed)
            .bind(preferences.navbar_collapsed)
            .bind(&preferences.font_family)
            .bind(preferences.font_size)
            .execute(&mut *tx)
            .await?;
    }

    if let Some((resource_kind, resource_slug, settings)) = resource_settings {
        sqlx::query(queries::get(
            pool.kind(),
            queries::RESOURCE_EDITOR_SETTINGS_UPSERT,
        ))
        .bind(resource_kind)
        .bind(resource_slug)
        .bind(&settings.authorship_mode)
        .bind(settings.colors_enabled)
        .execute(&mut *tx)
        .await?;
    }

    tx.commit().await?;
    Ok(())
}

pub async fn load_resource_editor_settings(
    pool: &Database,
    resource_kind: &str,
    resource_slug: &str,
) -> Result<ResourceEditorSettings, sqlx::Error> {
    let Some(row) = sqlx::query(queries::get(
        pool.kind(),
        queries::RESOURCE_EDITOR_SETTINGS_SELECT,
    ))
    .bind(resource_kind)
    .bind(resource_slug)
    .fetch_optional(pool.pool())
    .await?
    else {
        return Ok(ResourceEditorSettings::default());
    };

    Ok(ResourceEditorSettings {
        authorship_mode: crate::row_decode::text(&row, 0)?,
        colors_enabled: row.try_get::<i64, _>(1)? != 0,
    })
}

pub async fn delete_resource_editor_state(
    pool: &Database,
    resource_kind: &str,
    resource_slug: &str,
) -> Result<(), sqlx::Error> {
    let mut tx = pool.pool().begin().await?;
    sqlx::query(queries::get(
        pool.kind(),
        queries::RESOURCE_COLORS_DELETE_BY_RESOURCE,
    ))
    .bind(resource_kind)
    .bind(resource_slug)
    .execute(&mut *tx)
    .await?;
    sqlx::query(queries::get(
        pool.kind(),
        queries::RESOURCE_EDITOR_SETTINGS_DELETE,
    ))
    .bind(resource_kind)
    .bind(resource_slug)
    .execute(&mut *tx)
    .await?;
    tx.commit().await?;
    Ok(())
}