/*
 * Copyright 2018 faddenSoft
 *
 * Licensed 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.
 */
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

using CommonWinForms;

namespace MakeDist {
    public partial class CopyProgress : Form {
        /// <summary>
        /// Progress message, with colorful text.  This is generated by the worker thread and
        /// passed to the UI thread.
        /// </summary>
        public class ProgressMessage {
            public string Text { get; private set; }
            public Color Color { get; private set; }
            public bool HasColor { get { return Color.A != 0; } }

            public ProgressMessage(string msg) : this(msg, Color.FromArgb(0, 0, 0, 0)) { }

            public ProgressMessage(string msg, Color color) {
                Text = msg;
                Color = color;
            }
        }

        private bool mClosedWhileRunning;

        // Copy parameters.
        private FileCopier.BuildType mBuildType;
        private bool mCopyTestFiles;


        public CopyProgress(FileCopier.BuildType buildType, bool copyTestFiles) {
            InitializeComponent();

            this.Size = new Size(1200, 600);

            mBuildType = buildType;
            mCopyTestFiles = copyTestFiles;
        }

        private void CopyProgress_Load(object sender, EventArgs e) {
            backgroundWorker1.RunWorkerAsync();
        }

        private void CopyProgress_FormClosing(object sender, FormClosingEventArgs e) {
            if (backgroundWorker1.IsBusy) {
                backgroundWorker1.CancelAsync();
                DialogResult = DialogResult.Cancel;

                // First close attempt is converted to a cancel.
                if (!mClosedWhileRunning) {
                    e.Cancel = true;
                    mClosedWhileRunning = true;
                }
            } else {
                DialogResult = DialogResult.OK;
            }
        }

        private void cancelButton_Click(object sender, EventArgs e) {
            if (backgroundWorker1.IsBusy) {
                backgroundWorker1.CancelAsync();
            } else {
                Close();
            }
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) {
            BackgroundWorker worker = sender as BackgroundWorker;

            FileCopier copier = new FileCopier(mBuildType, mCopyTestFiles);
            e.Result = copier.CopyAllFiles(worker);
        }

        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e) {
            if (e.UserState is ProgressMessage) {
                ProgressMessage msg = e.UserState as ProgressMessage;
                if (msg.HasColor) {
                    progressRichTextBox.AppendText(msg.Text, msg.Color);
                } else {
                    // plain foreground text color
                    progressRichTextBox.AppendText(msg.Text);
                }
                progressRichTextBox.SelectionStart = progressRichTextBox.Text.Length;
                progressRichTextBox.ScrollToCaret();
            } else {
                if (!string.IsNullOrEmpty((string)e.UserState)) {
                    Debug.WriteLine("Weird progress: " + e.UserState);
                }
            }
        }

        private void backgroundWorker1_RunWorkerCompleted(object sender,
                RunWorkerCompletedEventArgs e) {
            if (e.Cancelled) {
                Debug.WriteLine("Test halted -- user cancellation");
            } else if (e.Error != null) {
                // test harness shouldn't be throwing errors like this
                Debug.WriteLine("Test failed: " + e.Error.ToString());
                progressRichTextBox.AppendText("\r\n");
                progressRichTextBox.AppendText(e.Error.ToString());
                progressRichTextBox.SelectionStart = progressRichTextBox.Text.Length;
                progressRichTextBox.ScrollToCaret();
            } else {
                bool ok = (bool)e.Result;
                Debug.WriteLine("Tests complete, success=" + ok);
            }

            if (mClosedWhileRunning) {
                Close();
            }

            cancelButton.Text = "Close";
        }
    }
}