/**
 * Watch Progress Utilities
 * Centralized constants and helper functions for watch progress calculations
 */
/**
 * Completion threshold - content is marked as "completed" when reaching this percentage
 */
export declare const COMPLETION_THRESHOLD = 0.9;
/**
 * Minimum progress threshold - don't save progress below this to avoid accidental saves
 */
export declare const MIN_PROGRESS_THRESHOLD = 0.05;
/**
 * Significant position change threshold in seconds
 * Used to detect seeks and trigger saves
 */
export declare const SIGNIFICANT_POSITION_CHANGE = 30;
/**
 * Backup save interval in milliseconds
 * How often to save progress during continuous playback
 */
export declare const BACKUP_SAVE_INTERVAL = 30000;
/**
 * Calculate progress percentage from current position and total duration
 * @param currentSeconds Current playback position in seconds
 * @param totalSeconds Total content duration in seconds
 * @returns Progress percentage (0-100)
 */
export declare function calculateProgressPercentage(currentSeconds: number, totalSeconds: number): number;
/**
 * Check if content is considered completed based on progress percentage
 * @param percentage Progress percentage (0-100)
 * @returns true if content is completed
 */
export declare function isCompleted(percentage: number): boolean;
/**
 * Check if content is considered completed based on position and duration
 * @param currentSeconds Current playback position in seconds
 * @param totalSeconds Total content duration in seconds
 * @returns true if content is completed
 */
export declare function isContentCompleted(currentSeconds: number, totalSeconds: number): boolean;
/**
 * Check if progress should be saved based on current percentage
 * @param percentage Progress percentage (0-100)
 * @returns true if progress should be saved
 */
export declare function shouldSaveProgress(percentage: number): boolean;
/**
 * Check if progress should be saved based on position and duration
 * @param currentSeconds Current playback position in seconds
 * @param totalSeconds Total content duration in seconds
 * @returns true if progress should be saved
 */
export declare function shouldSaveProgressByPosition(currentSeconds: number, totalSeconds: number): boolean;
/**
 * Format seconds into human-readable time string
 * @param seconds Duration in seconds
 * @returns Formatted time string (e.g., "1h 23m", "45m", "2m 30s")
 */
export declare function formatDuration(seconds: number): string;
/**
 * Format remaining time for continue watching display
 * @param remainingSeconds Remaining duration in seconds
 * @returns Formatted string (e.g., "23 min left", "1 hr 10 min left")
 */
export declare function formatRemainingTime(remainingSeconds: number): string;
/**
 * Calculate remaining time from progress and total duration
 * @param currentSeconds Current playback position in seconds
 * @param totalSeconds Total content duration in seconds
 * @returns Remaining seconds
 */
export declare function calculateRemainingTime(currentSeconds: number, totalSeconds: number): number;
/**
 * Generate a unique key for progress entry (for Map lookups)
 * @param contentId Content ID
 * @param episodeId Optional episode ID for series
 * @returns Unique key string
 */
export declare function getProgressKey(contentId: string, episodeId?: string): string;
/**
 * Generate a unique ID for a progress entry
 * @param contentId Content ID
 * @param episodeId Optional episode ID for series
 * @returns Unique ID string
 */
export declare function generateProgressId(contentId: string, episodeId?: string): string;
/**
 * Check if position change is significant enough to trigger a save
 * @param previousPosition Previous playback position in seconds
 * @param currentPosition Current playback position in seconds
 * @returns true if change is significant (likely a seek)
 */
export declare function isSignificantPositionChange(previousPosition: number, currentPosition: number): boolean;
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