/**
 * Session guard for WeChat accounts.
 *
 * Tracks pause state per account (e.g., after errcode -14 session expired).
 * Pause durations are per-account and stored in memory.
 */

const PAUSE_DURATION_MS = 60 * 60 * 1000 // 60 minutes

interface AccountPauseState {
    pausedAt: number
    resumeAt: number
    reason: string
}

const pauseStates = new Map<string, AccountPauseState>()

/**
 * Check if an account is currently paused.
 */
export function isPaused(accountId: string): boolean {
    const state = pauseStates.get(accountId)
    if (!state) return false
    if (Date.now() >= state.resumeAt) {
        // Pause expired — auto-clear
        pauseStates.delete(accountId)
        return false
    }
    return true
}

/**
 * Get remaining pause time in milliseconds, or 0 if not paused.
 */
export function getPauseRemainingMs(accountId: string): number {
    const state = pauseStates.get(accountId)
    if (!state) return 0
    const remaining = state.resumeAt - Date.now()
    if (remaining <= 0) {
        pauseStates.delete(accountId)
        return 0
    }
    return remaining
}

/**
 * Pause an account for the default duration (60 minutes).
 */
export function setPaused(accountId: string, reason: string = 'Session expired'): void {
    const now = Date.now()
    pauseStates.set(accountId, {
        pausedAt: now,
        resumeAt: now + PAUSE_DURATION_MS,
        reason,
    })
    console.log(`[weixin-session-guard] Account ${accountId} paused for 60 min: ${reason}`)
}

/**
 * Clear pause state for an account.
 */
export function clearPause(accountId: string): void {
    pauseStates.delete(accountId)
}

/**
 * Clear all pause states.
 */
export function clearAllPauses(): void {
    pauseStates.clear()
}