import { sessionStorageKeyConstants } from "@/constants/session-storage";

const recoveryKey = sessionStorageKeyConstants.BEFORE_EACH_ERROR_RECOVERY_COUNT;

/** Used when sessionStorage is missing, throws, or does not persist (e.g. some bots). */
let inMemoryRecoveryCount = 0;

export function getBeforeEachErrorRecoveryCount() {
    try {
        const stored = window.sessionStorage?.getItem(recoveryKey);
        if (stored !== null && stored !== undefined) {
            return Number(stored) || 0;
        }
    } catch {
        // sessionStorage unavailable; use in-memory fallback
    }

    return inMemoryRecoveryCount;
}

export function incrementBeforeEachErrorRecoveryCount() {
    const nextCount = getBeforeEachErrorRecoveryCount() + 1;
    inMemoryRecoveryCount = nextCount;

    try {
        window.sessionStorage?.setItem(recoveryKey, String(nextCount));
    } catch {
        // in-memory count already updated
    }

    return nextCount;
}

export function clearBeforeEachErrorRecoveryCount() {
    inMemoryRecoveryCount = 0;

    try {
        window.sessionStorage?.removeItem(recoveryKey);
    } catch {
        // in-memory count already cleared
    }
}

export function hasBeforeEachErrorRecoveryBeenAttempted() {
    return getBeforeEachErrorRecoveryCount() >= 1;
}

/** Test-only: resets in-memory and sessionStorage recovery state between unit tests. */
export function resetBeforeEachErrorRecoveryStateForTests() {
    clearBeforeEachErrorRecoveryCount();
}