/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import path from 'node:path';
import { promises as fsp, readFileSync } from 'node:fs';
import { Storage } from '../config/storage.js';
import { debugLogger } from './debugLogger.js';
export class UserAccountManager {
    getGoogleAccountsCachePath() {
        return Storage.getGoogleAccountsPath();
    }
    /**
     * Parses and validates the string content of an accounts file.
     * @param content The raw string content from the file.
     * @returns A valid UserAccounts object.
     */
    parseAndValidateAccounts(content) {
        const defaultState = { active: null, old: [] };
        if (!content.trim()) {
            return defaultState;
        }
        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
        const parsed = JSON.parse(content);
        // Inlined validation logic
        if (typeof parsed !== 'object' || parsed === null) {
            debugLogger.log('Invalid accounts file schema, starting fresh.');
            return defaultState;
        }
        // eslint-disable-next-line @typescript-eslint/no-unsafe-type-assertion
        const { active, old } = parsed;
        const isValid = (active === undefined || active === null || typeof active === 'string') &&
            (old === undefined ||
                (Array.isArray(old) && old.every((i) => typeof i === 'string')));
        if (!isValid) {
            debugLogger.log('Invalid accounts file schema, starting fresh.');
            return defaultState;
        }
        return {
            // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
            active: parsed.active ?? null,
            // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
            old: parsed.old ?? [],
        };
    }
    readAccountsSync(filePath) {
        const defaultState = { active: null, old: [] };
        try {
            const content = readFileSync(filePath, 'utf-8');
            return this.parseAndValidateAccounts(content);
        }
        catch (error) {
            if (error instanceof Error &&
                'code' in error &&
                error.code === 'ENOENT') {
                return defaultState;
            }
            debugLogger.log('Error during sync read of accounts, starting fresh.', error);
            return defaultState;
        }
    }
    async readAccounts(filePath) {
        const defaultState = { active: null, old: [] };
        try {
            const content = await fsp.readFile(filePath, 'utf-8');
            return this.parseAndValidateAccounts(content);
        }
        catch (error) {
            if (error instanceof Error &&
                'code' in error &&
                error.code === 'ENOENT') {
                return defaultState;
            }
            debugLogger.log('Could not parse accounts file, starting fresh.', error);
            return defaultState;
        }
    }
    async cacheGoogleAccount(email) {
        const filePath = this.getGoogleAccountsCachePath();
        await fsp.mkdir(path.dirname(filePath), { recursive: true });
        const accounts = await this.readAccounts(filePath);
        if (accounts.active && accounts.active !== email) {
            if (!accounts.old.includes(accounts.active)) {
                accounts.old.push(accounts.active);
            }
        }
        // If the new email was in the old list, remove it
        accounts.old = accounts.old.filter((oldEmail) => oldEmail !== email);
        accounts.active = email;
        await fsp.writeFile(filePath, JSON.stringify(accounts, null, 2), 'utf-8');
    }
    getCachedGoogleAccount() {
        const filePath = this.getGoogleAccountsCachePath();
        const accounts = this.readAccountsSync(filePath);
        return accounts.active;
    }
    getLifetimeGoogleAccounts() {
        const filePath = this.getGoogleAccountsCachePath();
        const accounts = this.readAccountsSync(filePath);
        const allAccounts = new Set(accounts.old);
        if (accounts.active) {
            allAccounts.add(accounts.active);
        }
        return allAccounts.size;
    }
    async clearCachedGoogleAccount() {
        const filePath = this.getGoogleAccountsCachePath();
        const accounts = await this.readAccounts(filePath);
        if (accounts.active) {
            if (!accounts.old.includes(accounts.active)) {
                accounts.old.push(accounts.active);
            }
            accounts.active = null;
        }
        await fsp.writeFile(filePath, JSON.stringify(accounts, null, 2), 'utf-8');
    }
}
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