use super::*;

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

#[derive(Debug, Clone, Copy)]
pub struct FileOwner {
    pub kind: FileOwnerKind,
    pub id: i64,
}

pub async fn find_file_owner(
    pool: &Database,
    token: &str,
) -> Result<Option<FileOwner>, sqlx::Error> {
    if let Some(id) = sqlx::query_scalar::<_, i64>(queries::get(pool.kind(), queries::Q026))
        .bind(token)
        .fetch_optional(pool.pool())
        .await?
    {
        return Ok(Some(FileOwner {
            kind: FileOwnerKind::Pad,
            id,
        }));
    }
    if let Some(id) = sqlx::query_scalar::<_, i64>(queries::get(pool.kind(), queries::Q027))
        .bind(token)
        .fetch_optional(pool.pool())
        .await?
    {
        return Ok(Some(FileOwner {
            kind: FileOwnerKind::Note,
            id,
        }));
    }
    Ok(None)
}

#[derive(Debug, Clone, Serialize)]
pub struct NoteFile {
    pub id: i64,
    pub filename: String,
    pub url: String,
    pub mime_type: String,
    pub size_bytes: i64,
    pub created_at: String,
    pub is_attached: bool,
    pub detached_at: Option<String>,
}

#[derive(Debug, Clone, FromRow)]
struct SqliteNoteFile {
    id: i64,
    filename: String,
    url: String,
    mime_type: String,
    size_bytes: i64,
    created_at: String,
    is_attached: i64,
    detached_at: Option<String>,
}

impl From<SqliteNoteFile> for NoteFile {
    fn from(value: SqliteNoteFile) -> Self {
        Self {
            id: value.id,
            filename: value.filename,
            url: value.url,
            mime_type: value.mime_type,
            size_bytes: value.size_bytes,
            created_at: value.created_at,
            is_attached: value.is_attached != 0,
            detached_at: value.detached_at,
        }
    }
}

pub async fn delete_note(pool: &Database, note_id: i64) -> Result<(), sqlx::Error> {
    sqlx::query(queries::get(pool.kind(), queries::Q031))
        .bind(note_id)
        .execute(pool.pool())
        .await?;
    Ok(())
}

pub async fn register_note_file(
    pool: &Database,
    note_id: i64,
    filename: &str,
    url: &str,
    mime_type: &str,
    size_bytes: i64,
) -> Result<(), sqlx::Error> {
    sqlx::query(queries::get(pool.kind(), queries::Q032))
        .bind(note_id)
        .bind(filename)
        .bind(url)
        .bind(mime_type)
        .bind(size_bytes)
        .execute(pool.pool())
        .await?;
    Ok(())
}

pub async fn list_note_files(pool: &Database, note_id: i64) -> Result<Vec<NoteFile>, sqlx::Error> {
    list_files(pool, queries::Q033, note_id).await
}

async fn list_files(
    pool: &Database,
    query: queries::Query,
    owner_id: i64,
) -> Result<Vec<NoteFile>, sqlx::Error> {
    if pool.kind() == DatabaseKind::Sqlite {
        return Ok(
            sqlx::query_as::<_, SqliteNoteFile>(queries::get(pool.kind(), query))
                .bind(owner_id)
                .fetch_all(pool.pool())
                .await?
                .into_iter()
                .map(NoteFile::from)
                .collect(),
        );
    }
    sqlx::query_as::<_, NoteFile>(queries::get(pool.kind(), query))
        .bind(owner_id)
        .fetch_all(pool.pool())
        .await
}

pub async fn set_note_file_attached(
    pool: &Database,
    file_id: i64,
    attached: bool,
) -> Result<(), sqlx::Error> {
    let detached_at: Option<String> = if attached {
        None
    } else {
        Some(chrono::Utc::now().to_rfc3339())
    };
    sqlx::query(queries::get(pool.kind(), queries::Q034))
        .bind(attached)
        .bind(detached_at)
        .bind(file_id)
        .execute(pool.pool())
        .await?;
    Ok(())
}

pub async fn register_pad_file(
    pool: &Database,
    pad_id: i64,
    filename: &str,
    url: &str,
    mime_type: &str,
    size_bytes: i64,
) -> Result<(), sqlx::Error> {
    sqlx::query(queries::get(pool.kind(), queries::Q035))
        .bind(pad_id)
        .bind(filename)
        .bind(url)
        .bind(mime_type)
        .bind(size_bytes)
        .execute(pool.pool())
        .await?;
    Ok(())
}

pub async fn list_pad_files(pool: &Database, pad_id: i64) -> Result<Vec<NoteFile>, sqlx::Error> {
    list_files(pool, queries::Q036, pad_id).await
}

pub async fn set_pad_file_attached(
    pool: &Database,
    file_id: i64,
    attached: bool,
) -> Result<(), sqlx::Error> {
    let detached_at: Option<String> = if attached {
        None
    } else {
        Some(chrono::Utc::now().to_rfc3339())
    };
    sqlx::query(queries::get(pool.kind(), queries::Q037))
        .bind(attached)
        .bind(detached_at)
        .bind(file_id)
        .execute(pool.pool())
        .await?;
    Ok(())
}

pub async fn find_note_file(
    pool: &Database,
    note_id: i64,
    file_id: i64,
) -> Result<Option<NoteFile>, sqlx::Error> {
    if pool.kind() == DatabaseKind::Sqlite {
        return Ok(
            sqlx::query_as::<_, SqliteNoteFile>(queries::get(pool.kind(), queries::Q038))
                .bind(file_id)
                .bind(note_id)
                .fetch_optional(pool.pool())
                .await?
                .map(NoteFile::from),
        );
    }
    sqlx::query_as::<_, NoteFile>(queries::get(pool.kind(), queries::Q038))
        .bind(file_id)
        .bind(note_id)
        .fetch_optional(pool.pool())
        .await
}

pub async fn delete_note_file(
    pool: &Database,
    note_id: i64,
    file_id: i64,
) -> Result<(), sqlx::Error> {
    sqlx::query(queries::get(pool.kind(), queries::Q039))
        .bind(file_id)
        .bind(note_id)
        .execute(pool.pool())
        .await?;
    Ok(())
}

pub async fn find_pad_file(
    pool: &Database,
    pad_id: i64,
    file_id: i64,
) -> Result<Option<NoteFile>, sqlx::Error> {
    if pool.kind() == DatabaseKind::Sqlite {
        return Ok(
            sqlx::query_as::<_, SqliteNoteFile>(queries::get(pool.kind(), queries::Q046))
                .bind(file_id)
                .bind(pad_id)
                .fetch_optional(pool.pool())
                .await?
                .map(NoteFile::from),
        );
    }
    sqlx::query_as::<_, NoteFile>(queries::get(pool.kind(), queries::Q046))
        .bind(file_id)
        .bind(pad_id)
        .fetch_optional(pool.pool())
        .await
}

pub async fn delete_pad_file(
    pool: &Database,
    pad_id: i64,
    file_id: i64,
) -> Result<(), sqlx::Error> {
    sqlx::query(queries::get(pool.kind(), queries::Q047))
        .bind(file_id)
        .bind(pad_id)
        .execute(pool.pool())
        .await?;
    Ok(())
}


impl<'r> sqlx::FromRow<'r, AnyRow> for NoteFile {
    fn from_row(row: &'r AnyRow) -> Result<Self, sqlx::Error> {
        let attached: i64 = row.try_get("is_attached")?;
        Ok(Self {
            id: row.try_get("id")?,
            filename: crate::row_decode::text(row, "filename")?,
            url: crate::row_decode::text(row, "url")?,
            mime_type: crate::row_decode::text(row, "mime_type")?,
            size_bytes: row.try_get("size_bytes")?,
            created_at: crate::row_decode::text(row, "created_at")?,
            is_attached: attached != 0,
            detached_at: crate::row_decode::optional_text(row, "detached_at")?,
        })
    }
}