/**
 * IMAP Client Manager
 * Manages connections to multiple IMAP servers with connection pooling
 */
import type { AccountConfig } from './config.js';
export interface EmailSummary {
    account_id: string;
    account_email: string;
    uid: number;
    message_id?: string;
    subject: string;
    from: string;
    to: string;
    date: string;
    flags: string[];
    snippet: string;
}
export interface UnavailableAccount {
    account_id: string;
    account_email: string;
    code: string;
    reason: string;
}
export type SearchEmailResults = EmailSummary[] & {
    unavailableAccounts?: UnavailableAccount[];
};
export interface EmailDetail {
    account_id: string;
    account_email: string;
    uid: number;
    message_id?: string;
    in_reply_to?: string;
    references?: string;
    subject: string;
    from: string;
    to: string;
    cc?: string;
    bcc?: string;
    date: string;
    flags: string[];
    body_text: string;
    attachments: AttachmentInfo[];
}
export interface AttachmentInfo {
    filename: string;
    content_type: string;
    size: number;
    content_id?: string;
}
export interface FolderInfo {
    name: string;
    path: string;
    flags: string[];
    delimiter: string;
}
export interface FolderStatusInfo {
    messages: number;
    unseen: number;
    uid_next: number;
}
/** Clear the sent folder path cache */
export declare function clearSentFolderCache(): number;
/**
 * Resolve the Sent folder path for the given account.
 * Uses provider-specific defaults, then verifies via IMAP folder listing.
 * Results are cached per account.
 */
export declare function resolveSentFolder(account: AccountConfig): Promise<string>;
/**
 * Append a raw RFC2822 message to an IMAP folder.
 * Used to save sent emails to the Sent folder.
 */
export declare function appendToFolder(account: AccountConfig, folder: string, message: Buffer | string, flags?: string[]): Promise<boolean>;
export declare function searchEmails(accounts: AccountConfig[], query: string, folder: string, limit: number): Promise<SearchEmailResults>;
/**
 * Read a single email by UID
 */
export declare function readEmail(account: AccountConfig, uid: number, folder: string): Promise<EmailDetail>;
/**
 * Modify email flags (mark read/unread, flag/unflag)
 */
export declare function modifyFlags(account: AccountConfig, uids: number[], folder: string, flags: string[], action: 'add' | 'remove'): Promise<{
    success: boolean;
    modified: number;
}>;
/**
 * Move emails to another folder
 */
export declare function moveEmails(account: AccountConfig, uids: number[], fromFolder: string, toFolder: string): Promise<{
    success: boolean;
    moved: number;
}>;
/**
 * Delete (trash) emails
 */
export declare function trashEmails(account: AccountConfig, uids: number[], folder: string): Promise<{
    success: boolean;
    trashed: number;
}>;
/**
 * List mailbox folders
 */
export declare function listFolders(account: AccountConfig): Promise<FolderInfo[]>;
/**
 * Read STATUS metadata for one mailbox without selecting or enumerating it.
 */
export declare function getFolderStatus(account: AccountConfig, folder: string): Promise<FolderStatusInfo>;
/**
 * Get attachment content by filename
 */
export declare function getAttachment(account: AccountConfig, uid: number, folder: string, filename: string): Promise<{
    filename: string;
    content_type: string;
    size: number;
    content_base64: string;
}>;
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