/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
*/

/* global WinJS */
/* eslint no-undef : 0 */
'use strict';

var LOG_HEADER_HEIGHT = 20;
var CONTENT_TOP_OFFSET = 30;

var isWin = cordova.platformId === 'windows';
var isWP8 = cordova.platformId === 'windowsphone';

/******************************************************************************/

function getMode (callback) {
    var mode = localStorage.getItem('cdvtests-mode') || 'main';
    callback(mode);
}

function setMode (mode) {
    var handlers = {
        'main': runMain,
        'auto': runAutoTests,
        'manual': runManualTests
    };
    if (!handlers.hasOwnProperty(mode)) {
        console.error('Unsupported mode: ' + mode);
        console.error("Defaulting to 'main'");
        mode = 'main';
    }

    localStorage.setItem('cdvtests-mode', mode);
    clearContent();

    handlers[mode]();
}

/******************************************************************************/

function clearContent () {
    var content = document.getElementById('content');
    content.innerHTML = '';
    var log = document.getElementById('log--content');
    log.innerHTML = '';
    var buttons = document.getElementById('buttons');
    buttons.innerHTML = '';

    setLogVisibility(false);
}

/******************************************************************************/

function setTitle (title) {
    var el = document.getElementById('title');
    el.textContent = title;
}

/******************************************************************************/

function setLogVisibility (visible) {
    if (visible) {
        document.querySelector('body').classList.add('expanded-log');

        if (isWin || isWP8) {
            var h = document.querySelector('body').offsetHeight;

            document.getElementById('middle').style.height = (h * 0.6 - LOG_HEADER_HEIGHT - CONTENT_TOP_OFFSET) + 'px';
            document.getElementById('middle').style.marginBottom = (h * 0.4) + 'px';
            document.getElementById('middle').style.paddingBottom = (h * 0.4) + 'px';
        }
    } else {
        document.querySelector('body').classList.remove('expanded-log');

        if (isWin || isWP8) {
            document.getElementById('middle').style.height = '';
            document.getElementById('middle').style.marginBottom = '';
            document.getElementById('middle').style.paddingBottom = '';
        }
    }
}

window.onresize = function (event) {
    // Update content and log heights
    if (isWin || isWP8) {
        setLogVisibility(getLogVisibility());
    }
};

function getLogVisibility () {
    var e = document.querySelector('body');
    return e.classList.contains('expanded-log');
}

function toggleLogVisibility () {
    if (getLogVisibility()) {
        setLogVisibility(false);
    } else {
        setLogVisibility(true);
    }
}

/******************************************************************************/

function attachEvents () {
    document.getElementById('log--title').addEventListener('click', toggleLogVisibility);
}

/******************************************************************************/

var origConsole = window.console;

exports.wrapConsole = function () {
    function appendToOnscreenLog (type, args) {
        var el = document.getElementById('log--content');
        var div = document.createElement('div');
        div.classList.add('log--content--line');
        div.classList.add('log--content--line--' + type);
        div.textContent = Array.prototype.slice.apply(args).map(function (arg) {
            return (typeof arg === 'string') ? arg : JSON.stringify(arg);
        }).join(' ');
        el.appendChild(div);
        // scroll to bottom
        el.scrollTop = el.scrollHeight;
    }

    function createCustomLogger (type) {
        return function () {
            origConsole[type].apply(origConsole, arguments);
            appendToOnscreenLog(type, arguments);
            setLogVisibility(true);
        };
    }

    window.console = {
        log: createCustomLogger('log'),
        warn: createCustomLogger('warn'),
        error: createCustomLogger('error')
    };
};

exports.unwrapConsole = function () {
    window.console = origConsole;
};

/******************************************************************************/

function createActionButton (title, callback, appendTo) {
    appendTo = appendTo || 'buttons';
    var buttons = document.getElementById(appendTo);
    var div = document.createElement('div');
    var button = document.createElement('a');
    button.textContent = title;
    button.onclick = function (e) {
        e.preventDefault();
        callback();
    };
    button.classList.add('topcoat-button');
    div.appendChild(button);
    buttons.appendChild(div);
}

/******************************************************************************/

function setupAutoTestsEnablers (cdvtests) {
    var enablerList = createEnablerList();

    // Iterate over all the registered test modules
    iterateAutoTests(cdvtests, function (api, testModule) {
        // For "standard" plugins remove the common/repetitive bits of
        // the api key, for use as the title.  For third-party plugins, the full
        // api will be used as the title
        var title = api.replace(/org\.apache\.cordova\./i, '').replace(/\.tests.tests/i, '');

        createEnablerCheckbox(api, title, testModule.getEnabled(), enablerList.id, toggleTestHandler);
    });

    updateEnabledTestCount();
}

/******************************************************************************/

function createEnablerList () {
    var buttons = document.getElementById('buttons');

    var enablerContainer = document.createElement('div');
    enablerContainer.id = 'test-enablers-container';

    // Create header to show count of enabled/total tests
    var header = document.createElement('h3');
    header.id = 'tests-enabled';

    // Create widget to show/hide list
    var expander = document.createElement('span');
    expander.id = 'test-expander';
    expander.innerText = 'Show/hide tests to be run';
    expander.onclick = toggleEnablerVisibility;

    // Create list to contain checkboxes for each test
    var enablerList = document.createElement('div');
    enablerList.id = 'test-list';

    // Create select/deselect all buttons (in button bar)
    var checkButtonBar = document.createElement('ul');
    checkButtonBar.classList.add('topcoat-button-bar');

    function createSelectToggleButton (title, selected) {
        var barItem = document.createElement('li');
        barItem.classList.add('topcoat-button-bar__item');

        var link = document.createElement('a');
        link.classList.add('topcoat-button-bar__button');
        link.innerText = title;
        link.href = null;
        link.onclick = function (e) {
            e.preventDefault();
            toggleSelected(enablerList.id, selected);
            return false;
        };

        barItem.appendChild(link);
        checkButtonBar.appendChild(barItem);
    }
    createSelectToggleButton('Check all', true);
    createSelectToggleButton('Uncheck all', false);
    enablerList.appendChild(checkButtonBar);

    enablerContainer.appendChild(header);
    enablerContainer.appendChild(expander);
    enablerContainer.appendChild(enablerList);

    buttons.appendChild(enablerContainer);

    return enablerList;
}

/******************************************************************************/

function updateEnabledTestCount () {
    var enabledLabel = document.getElementById('tests-enabled');

    // Determine how many tests are currently enabled
    var cdvtests = cordova.require('cordova-plugin-test-framework.cdvtests');
    var total = 0;
    var enabled = 0;
    iterateAutoTests(cdvtests, function (api, testModule) {
        total++;
        if (testModule.getEnabled()) {
            enabled++;
        }
    });

    if (enabled === total) {
        enabledLabel.innerText = 'Running All Tests.';
    } else {
        enabledLabel.innerText = 'Running ' + enabled + ' of ' + total + ' Tests.';
    }
}

/******************************************************************************/

function toggleSelected (containerId, newCheckedValue) {
    [].forEach.call(document.getElementById(containerId).getElementsByTagName('input'), function (input) {
        if (input.type !== 'checkbox') return;
        input.checked = newCheckedValue;
        toggleTestEnabled(input);
    });
    updateEnabledTestCount();
}

/******************************************************************************/

function toggleEnablerVisibility () {
    var enablerList = document.getElementById('test-list');
    if (enablerList.classList.contains('expanded')) {
        enablerList.classList.remove('expanded');
    } else {
        enablerList.classList.add('expanded');
    }
}

/******************************************************************************/

function createEnablerCheckbox (api, title, isEnabled, appendTo, callback) {
    var container = document.getElementById(appendTo);

    var label = document.createElement('label');
    label.classList.add('topcoat-checkbox');

    var checkbox = document.createElement('input');
    checkbox.type = 'checkbox';
    checkbox.value = api;
    checkbox.checked = isEnabled;
    label.htmlFor = checkbox.id = 'enable_' + api;

    checkbox.onchange = function (e) {
        e.preventDefault();
        callback(e);
    };

    var div = document.createElement('div');
    div.classList.add('topcoat-checkbox__checkmark');

    var text = document.createElement('span');
    text.innerText = title;

    label.appendChild(checkbox);
    label.appendChild(div);
    label.appendChild(text);

    container.appendChild(label);
}

/******************************************************************************/

function toggleTestHandler (event) {
    var checkbox = event.target;

    toggleTestEnabled(checkbox);
    updateEnabledTestCount();
}

/******************************************************************************/

function toggleTestEnabled (checkbox) {
    var cdvtests = cordova.require('cordova-plugin-test-framework.cdvtests');
    cdvtests.tests[checkbox.value].setEnabled(checkbox.checked);
}

/******************************************************************************/

function iterateAutoTests (cdvtests, callback) {
    Object.keys(cdvtests.tests).forEach(function (api) {
        var testModule = cdvtests.tests[api];
        if (!testModule.hasOwnProperty('defineAutoTests')) {
            return;
        }
        callback(api, testModule);
    });
}

/******************************************************************************/

function runAutoTests () {
    setTitle('Auto Tests');

    createActionButton('Run', setMode.bind(null, 'auto'));
    createActionButton('Reset App', location.reload.bind(location));
    createActionButton('Back', setMode.bind(null, 'main'));

    var cdvtests = cordova.require('cordova-plugin-test-framework.cdvtests');
    cdvtests.init();
    setupAutoTestsEnablers(cdvtests);

    cdvtests.defineAutoTests();

    // Run the tests!
    var jasmineEnv = window.jasmine.getEnv();

    jasmineEnv.execute();
}

/******************************************************************************/

function runManualTests () {
    setTitle('Manual Tests');

    createActionButton('Reset App', location.reload.bind(location));
    createActionButton('Back', setMode.bind(null, 'main'));

    var contentEl = document.getElementById('content');
    var beforeEach = function (title) {
        clearContent();
        setTitle(title || 'Manual Tests');
        createActionButton('Reset App', location.reload.bind(location));
        createActionButton('Back', setMode.bind(null, 'manual'));
    };
    var cdvtests = cordova.require('cordova-plugin-test-framework.cdvtests');
    cdvtests.defineManualTests(contentEl, beforeEach, createActionButton);
}

/******************************************************************************/

function runMain () {
    setTitle('Apache Cordova Plugin Tests');

    createActionButton('Auto Tests', setMode.bind(null, 'auto'));
    createActionButton('Manual Tests', setMode.bind(null, 'manual'));
    createActionButton('Reset App', location.reload.bind(location));
    if (/showBack/.exec(location.hash)) {
        createActionButton('Back', function () {
            history.go(-1);
        });
    }

    if (isWin && typeof WinJS !== 'undefined') {
        var app = WinJS.Application;
        app.addEventListener('error', function (err) { // eslint-disable-line handle-callback-err
            // We do not want an unhandled exception to crash the test app
            // Returning true marks it as being handled
            return true;
        });
    }
}

/******************************************************************************/

exports.init = function () {
    // TODO: have a way to opt-out of console wrapping in case line numbers are important.
    // ...Or find a custom way to print line numbers using stack or something.
    // make sure to always wrap when using medic.
    attachEvents();
    exports.wrapConsole();

    var medic = require('cordova-plugin-test-framework.medic');
    medic.load(function () {
        if (medic.enabled) {
            setMode('auto');
        } else {
            getMode(setMode);
        }
    });
};

/******************************************************************************/