(function (root, factory) {
    var api = factory();
    if (typeof module === 'object' && module.exports) {
        module.exports = api;
    }
    if (root) {
        root.TaberebaBookmarkletReceiver = api;
    }
}(typeof window !== 'undefined' ? window : globalThis, function () {
    'use strict';

    var prefix = '#tabereba_shop=';

    function validPayload(payload) {
        var keys = payload && typeof payload === 'object' ? Object.keys(payload).sort() : [];
        return keys.join(',') === 'bookmarklet_version,hotpepper_url,schema_version,service,shop_id,source'
            && payload.service === 'tabereba' && payload.schema_version === 1
            && payload.bookmarklet_version === '1.0.0' && payload.source === 'hotpepper_gourmet'
            && typeof payload.shop_id === 'string' && /^J[0-9]{9}$/.test(payload.shop_id)
            && typeof payload.hotpepper_url === 'string' && payload.hotpepper_url.length <= 2048;
    }

    function decode(hash) {
        hash = String(hash || '');
        if (hash.indexOf(prefix) !== 0 || hash.length > 4096) {
            return {success: false, message: '店舗データが見つからないか、サイズが上限を超えています。'};
        }
        var encoded = hash.slice(prefix.length);
        if (!/^[A-Za-z0-9_-]+$/.test(encoded)) {
            return {success: false, message: '店舗データの形式が正しくありません。'};
        }
        try {
            var base64 = encoded.replace(/-/g, '+').replace(/_/g, '/')
                + '='.repeat((4 - encoded.length % 4) % 4);
            var binary = atob(base64);
            var bytes = Uint8Array.from(binary, function (character) { return character.charCodeAt(0); });
            var json = new TextDecoder('utf-8', {fatal: true}).decode(bytes);
            var payload = JSON.parse(json);
            if (!validPayload(payload)) {
                throw new Error('invalid payload');
            }
            return {success: true, message: '', json: json, payload: payload};
        } catch (error) {
            return {success: false, message: '店舗データを読み取れませんでした。通常検索をご利用ください。'};
        }
    }

    function receive(windowObject, documentObject) {
        var hash = String(windowObject.location.hash || '');
        if (hash.indexOf(prefix) !== 0) {
            return {handled: false, success: true};
        }
        var result = decode(hash);
        try {
            windowObject.history.replaceState(null, documentObject.title,
                windowObject.location.pathname + windowObject.location.search);
        } catch (error) {}
        if (!result.success) {
            windowObject.alert(result.message);
            return {handled: true, success: false};
        }
        var form = documentObject.createElement('form');
        form.method = 'post';
        form.action = 'index.php#tb-link-generator';
        var settings = '';
        try { settings = windowObject.localStorage.getItem('tabereba_settings_v1') || ''; } catch (error) {}
        var fields = {bookmarklet_payload: result.json, user_settings_json: settings};
        Object.keys(fields).forEach(function (name) {
            var input = documentObject.createElement('input');
            input.type = 'hidden';
            input.name = name;
            input.value = fields[name];
            form.appendChild(input);
        });
        documentObject.body.appendChild(form);
        form.submit();
        return {handled: true, success: true};
    }

    if (typeof window !== 'undefined' && typeof document !== 'undefined') {
        receive(window, document);
    }

    return {decode: decode, receive: receive};
}));