using System;
using System.Drawing; 
using System.Linq; 
using System.Windows.Forms;
using System.IO;

namespace DualScreenDemo
{
    public partial class PrimaryForm
    {
        /// <summary>
        /// 當使用者點擊「詞數查歌」按鈕時，切換到詞數查歌模式，更新 UI 並顯示對應的查歌界面。
        /// </summary>
        /// <param name="sender">觸發事件的按鈕。</param>
        /// <param name="e">事件參數。</param>
        private void WordCountSearchSong_Click(object sender, EventArgs e)
        { 
            // 設定查歌模式按鈕的背景圖片
            zhuyinSearchSongButton.BackgroundImage = zhuyinSearchSongNormalBackground; // 注音查歌（普通狀態）
            englishSearchSongButton.BackgroundImage = englishSearchSongNormalBackground; // 英文查歌（普通狀態）
            pinyinSearchSongButton.BackgroundImage = pinyinSearchSongNormalBackground; // 拼音查歌（普通狀態）
            wordCountSearchSongButton.BackgroundImage = wordCountSearchSongActiveBackground; // 詞數查歌（選中狀態）
            handWritingSearchSongButton.BackgroundImage = handWritingSearchNormalBackground; // 手寫查歌（普通狀態）
            numberSearchSongButton.BackgroundImage = numberSearchSongNormalBackground; // 數字查歌（普通狀態）

            // 顯示詞數查歌對應的圖片
            ShowImageOnPictureBoxWordCount(Path.Combine(Application.StartupPath, @"themes\superstar\6-1.png"));

            // 設定詞數查歌的 PictureBox 和按鈕的可見性
            SetPictureBoxWordCountAndButtonsVisibility(true);
            pictureBoxWordCount.Visible = true; // 顯示 PictureBoxWordCount

        }
        /// <summary>
        /// 顯示詞數查歌對應的圖片
        /// </summary>
        /// <param name="imagePath">圖片路徑</param>
        private void ShowImageOnPictureBoxWordCount(string imagePath)
        {
            
            // 載入原始圖片
            Bitmap originalImage = new Bitmap(imagePath);

            // 定義裁切區域 (起始座標: 593, 135，寬度: 507，高度: 508)
            Rectangle cropArea = new Rectangle(593, 135, 507, 508);

            // 裁切圖片，獲得指定範圍的影像
            Bitmap croppedImage = CropImage(originalImage, cropArea);

            // 將裁切後的圖片顯示在 pictureBoxWordCount 上
            pictureBoxWordCount.Image = croppedImage;

            // 調整 pictureBoxWordCount 的大小與位置
            ResizeAndPositionPictureBox(pictureBoxWordCount, 
                cropArea.X + offsetXWordCount, // X 座標 (包含位移量)
                cropArea.Y + offsetYWordCount, // Y 座標 (包含位移量)
                cropArea.Width,  // 寬度
                cropArea.Height  // 高度
            );

            // 顯示 pictureBoxWordCount
            pictureBoxWordCount.Visible = true;

        }

            /// <summary>
            /// 初始化「詞數查歌」模式的按鈕與輸入框，並根據螢幕解析度進行調整。
            /// </summary>
            private void InitializeButtonsForPictureBoxWordCount()
            {
                // 定義數字按鈕的座標範圍 (左上角 X, Y 以及右下角 X, Y)
                int[,] coords = new int[,]
                {
                    {651, 292, 752, 400},  // 1
                    {760, 292, 861, 400},  // 2
                    {869, 292, 972, 399},  // 3
                    {652, 401, 752, 502},  // 4
                    {760, 401, 861, 504},  // 5
                    {869, 398, 972, 502},  // 6
                    {651, 502, 753, 607},  // 7
                    {759, 504, 863, 607},  // 8
                    {869, 503, 973, 608},  // 9
                    {981, 501, 1083, 609}  // 0
                };

                // 取得螢幕解析度
                int screenW = Screen.PrimaryScreen.Bounds.Width;
                int screenH = Screen.PrimaryScreen.Bounds.Height;

                // 計算寬高比例，供座標縮放使用
                float widthRatio = screenW / (float)1440;
                float heightRatio = screenH / (float)900;

                // 建立數字按鈕陣列
                numberButtonsWordCount = new Button[10];

                // 依序建立 0-9 按鈕
                for (int i = 0; i < numberButtonsWordCount.Length; i++)
                {
                    numberButtonsWordCount[i] = new Button();

                    // 設定按鈕屬性 (位置、大小、圖片)
                    ConfigureButton(
                        numberButtonsWordCount[i],
                        coords[i, 0], 
                        coords[i, 1], 
                        coords[i, 2] - coords[i, 0], // 計算按鈕寬度
                        coords[i, 3] - coords[i, 1], // 計算按鈕高度
                        resizedNormalStateImageFor6_1,
                        resizedMouseOverImageFor6_1,
                        resizedMouseDownImageFor6_1,
                        null
                    );

                    // 調整按鈕位置，使其適應不同解析度
                    int newXForWordCount = (int)(((numberButtonsWordCount[i].Location.X / widthRatio) + offsetXWordCount) * widthRatio);
                    int newYForWordCount = (int)(((numberButtonsWordCount[i].Location.Y / heightRatio) + offsetYWordCount) * heightRatio);
                    numberButtonsWordCount[i].Location = new Point(newXForWordCount, newYForWordCount);

                    // 設定按鈕名稱
                    numberButtonsWordCount[i].Name = "NumberButtonWordCount" + i;
                    numberButtonsWordCount[i].Tag = (i + 1).ToString();

                    // 處理按鈕 0 的特殊名稱與標籤
                    if (i == 9)
                    {
                        numberButtonsWordCount[i].Name = "NumberButtonWordCount0";
                        numberButtonsWordCount[i].Tag = "0";
                    }

                    // 設定點擊事件
                    numberButtonsWordCount[i].Click += WordCountButton_Click;

                    // 將按鈕加入視窗控制項
                    this.Controls.Add(numberButtonsWordCount[i]);
                }

                // 建立「修改」按鈕 (Modify)
                modifyButtonWordCount = new Button {
                    Name = "ModifyButtonWordCount",
                    Tag = "Modify",
                    Visible = false
                };
                ConfigureButton(modifyButtonWordCount, 978, 292, 1081 - 978, 397 - 292,
                    resizedNormalStateImageFor6_1, resizedMouseOverImageFor6_1, resizedMouseDownImageFor6_1,
                    ModifyButtonWordCount_Click);

                // 調整「修改」按鈕的位置
                int newX = (int)(((modifyButtonWordCount.Location.X / widthRatio) + offsetXWordCount) * widthRatio);
                int newY = (int)(((modifyButtonWordCount.Location.Y / heightRatio) + offsetYWordCount) * heightRatio);
                modifyButtonWordCount.Location = new Point(newX, newY);

                // 加入「修改」按鈕至視窗
                this.Controls.Add(modifyButtonWordCount);

                // 建立「關閉」按鈕 (Close)
                closeButtonWordCount = new Button {
                    Name = "CloseButtonWordCount",
                    Tag = "Close",
                    Visible = false
                };
                ConfigureButton(closeButtonWordCount, 982, 147, 1082 - 982, 250 - 147,
                    resizedNormalStateImageFor6_1, resizedMouseOverImageFor6_1, resizedMouseDownImageFor6_1,
                    CloseButtonWordCount_Click);

                // 調整「關閉」按鈕的位置
                newX = (int)(((closeButtonWordCount.Location.X / widthRatio) + offsetXWordCount) * widthRatio);
                newY = (int)(((closeButtonWordCount.Location.Y / heightRatio) + offsetYWordCount) * heightRatio);
                closeButtonWordCount.Location = new Point(newX, newY);

                // 加入「關閉」按鈕至視窗
                this.Controls.Add(closeButtonWordCount);

                // 建立輸入框 (RichTextBox) 供使用者輸入詞數
                inputBoxWordCount = new RichTextBox();
                inputBoxWordCount.Name = "inputBoxWordCount";

                // 設定輸入框位置與大小
                ResizeAndPositionControl(inputBoxWordCount, 645 + offsetXWordCount, 197 + offsetYWordCount, 986 - 645, 281 - 197);
                inputBoxWordCount.ForeColor = Color.Black;
                inputBoxWordCount.Font = new Font("細明體", (float)26 / 900 * Screen.PrimaryScreen.Bounds.Height, FontStyle.Regular);

                // 設定輸入框內容變更時的處理邏輯
                inputBoxWordCount.TextChanged += (sender, e) =>
                {
                    string searchText = inputBoxWordCount.Text;
                    int targetLength = 0;

                    // 檢查輸入的是否為數字
                    if (int.TryParse(searchText, out targetLength))
                    {
                        // 根據詞數長度篩選歌曲
                        var searchResults = allSongs.Where(song => song.Song.Replace(" ", "").Length == targetLength).ToList();
                        currentPage = 0;
                        currentSongList = searchResults;
                        totalPages = (int)Math.Ceiling((double)searchResults.Count / itemsPerPage);

                        // 更新多頁面面板
                        multiPagePanel.currentPageIndex = 0;
                        multiPagePanel.LoadSongs(currentSongList);
                    }
                    else
                    {
                        // 若輸入非數字，則清空當前歌曲列表
                        currentSongList.Clear();
                    }
                };

                // 加入輸入框至視窗
                this.Controls.Add(inputBoxWordCount);
            }


        
            /// <summary>
            /// 處理數字按鈕的點擊事件，將按鈕對應的數字 (Tag) 加入輸入框 inputBoxWordCount 中。
            /// </summary>
            /// <param name="sender">觸發事件的按鈕</param>
            /// <param name="e">事件參數</param>
            private void WordCountButton_Click(object sender, EventArgs e)
            {
                // 嘗試將 sender 轉換為 Button 類型
                var button = sender as Button;

                // 確保按鈕不為空，且擁有有效的 Tag 值
                if (button != null && button.Tag != null)
                {
                    // 將按鈕的 Tag 值 (數字) 追加到輸入框中
                    inputBoxWordCount.Text += button.Tag.ToString();
                }
            }

            /// <summary>
            /// 關閉詞數輸入界面，隱藏相關的 PictureBox 和按鈕。
            /// </summary>
            /// <param name="sender">觸發事件的按鈕。</param>
            /// <param name="e">事件參數。</param>
            private void CloseButtonWordCount_Click(object sender, EventArgs e)
            {
                // 設定詞數輸入界面及其按鈕的可見性為 false，使其隱藏
                SetPictureBoxWordCountAndButtonsVisibility(false);
            }
    }
}