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use std::{any::Any, io, path::PathBuf, result};
use thiserror::Error;
use tokio::task::JoinError;

use crate::{AnyBoxedError, AnyError};

/// The global `Result` alias of the module.
pub type Result<T> = result::Result<T, Error>;

/// The global `Result` alias of the module.
#[derive(Debug, Error)]
pub enum Error {
    #[error("cannot create imap folder {1}")]
    CreateFolderImapError(#[source] imap::Error, String),
    #[error("cannot create maildir folder structure at {1}")]
    CreateFolderStructureMaildirError(#[source] maildirpp::Error, PathBuf),
    #[error("cannot create notmuch folder structure at {1}")]
    CreateFolderStructureNotmuchError(#[source] maildirpp::Error, PathBuf),
    #[error("cannot delete imap folder {1}")]
    DeleteFolderImapError(#[source] imap::Error, String),
    #[error("cannot delete maildir folder {1}")]
    DeleteFolderMaildirError(#[source] io::Error, PathBuf),
    #[error("cannot select imap folder {1}")]
    SelectFolderImapError(#[source] imap::Error, String),
    #[error("cannot add imap flag deleted to all envelopes in folder {1}")]
    AddDeletedFlagImapError(#[source] imap::Error, String),
    #[error("cannot expunge imap folder {1}")]
    ExpungeFolderImapError(#[source] imap::Error, String),
    #[error("maildir: cannot list current folder from {1}")]
    ListCurrentFolderMaildirError(#[source] maildirpp::Error, PathBuf),
    #[error("maildir: cannot delete message {2} from folder {1}")]
    DeleteMessageMaildirError(#[source] maildirpp::Error, PathBuf, String),
    #[error("cannot parse folder kind {0}")]
    ParseFolderKindError(String),
    #[error("cannot list imap folders")]
    ListFoldersImapError(#[source] imap::Error),
    #[error("cannot get uid of imap folder {0}: uid is missing")]
    GetUidMissingImapError(u32),
    #[error("cannot gather folders: {0}")]
    FolderTasksFailed(JoinError),

    #[error("cannot sync: cannot list folders from left cache")]
    ListLeftFoldersCachedError(#[source] AnyBoxedError),
    #[error("cannot sync: cannot list folders from left backend")]
    ListLeftFoldersError(#[source] AnyBoxedError),
    #[error("cannot sync: cannot list folders from right cache")]
    ListRightFoldersCachedError(#[source] AnyBoxedError),
    #[error("cannot sync: cannot list folders from right backend")]
    ListRightFoldersError(#[source] AnyBoxedError),
}

impl AnyError for Error {
    fn as_any(&self) -> &dyn Any {
        self
    }
}

impl From<Error> for AnyBoxedError {
    fn from(err: Error) -> Self {
        Box::new(err)
    }
}