'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var wrapIdbValue = require('./wrap-idb-value.js');

/**
 * Open a database.
 *
 * @param name Name of the database.
 * @param version Schema version.
 * @param callbacks Additional callbacks.
 */
function openDB(name, version, { blocked, upgrade, blocking, terminated } = {}) {
    const request = indexedDB.open(name, version);
    const openPromise = wrapIdbValue.wrap(request);
    if (upgrade) {
        request.addEventListener('upgradeneeded', (event) => {
            upgrade(wrapIdbValue.wrap(request.result), event.oldVersion, event.newVersion, wrapIdbValue.wrap(request.transaction));
        });
    }
    if (blocked)
        request.addEventListener('blocked', () => blocked());
    openPromise
        .then((db) => {
        if (terminated)
            db.addEventListener('close', () => terminated());
        if (blocking)
            db.addEventListener('versionchange', () => blocking());
    })
        .catch(() => { });
    return openPromise;
}
/**
 * Delete a database.
 *
 * @param name Name of the database.
 */
function deleteDB(name, { blocked } = {}) {
    const request = indexedDB.deleteDatabase(name);
    if (blocked)
        request.addEventListener('blocked', () => blocked());
    return wrapIdbValue.wrap(request).then(() => undefined);
}

const readMethods = ['get', 'getKey', 'getAll', 'getAllKeys', 'count'];
const writeMethods = ['put', 'add', 'delete', 'clear'];
const cachedMethods = new Map();
function getMethod(target, prop) {
    if (!(target instanceof IDBDatabase &&
        !(prop in target) &&
        typeof prop === 'string')) {
        return;
    }
    if (cachedMethods.get(prop))
        return cachedMethods.get(prop);
    const targetFuncName = prop.replace(/FromIndex$/, '');
    const useIndex = prop !== targetFuncName;
    const isWrite = writeMethods.includes(targetFuncName);
    if (
    // Bail if the target doesn't exist on the target. Eg, getAll isn't in Edge.
    !(targetFuncName in (useIndex ? IDBIndex : IDBObjectStore).prototype) ||
        !(isWrite || readMethods.includes(targetFuncName))) {
        return;
    }
    const method = async function (storeName, ...args) {
        // isWrite ? 'readwrite' : undefined gzipps better, but fails in Edge :(
        const tx = this.transaction(storeName, isWrite ? 'readwrite' : 'readonly');
        let target = tx.store;
        if (useIndex)
            target = target.index(args.shift());
        // Must reject if op rejects.
        // If it's a write operation, must reject if tx.done rejects.
        // Must reject with op rejection first.
        // Must resolve with op value.
        // Must handle both promises (no unhandled rejections)
        return (await Promise.all([
            target[targetFuncName](...args),
            isWrite && tx.done,
        ]))[0];
    };
    cachedMethods.set(prop, method);
    return method;
}
wrapIdbValue.replaceTraps((oldTraps) => ({
    ...oldTraps,
    get: (target, prop, receiver) => getMethod(target, prop) || oldTraps.get(target, prop, receiver),
    has: (target, prop) => !!getMethod(target, prop) || oldTraps.has(target, prop),
}));

exports.unwrap = wrapIdbValue.unwrap;
exports.wrap = wrapIdbValue.wrap;
exports.deleteDB = deleteDB;
exports.openDB = openDB;