/*
 * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
 *
 * 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.
 */

package net.micode.notes.tool;

import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.OperationApplicationException;
import android.database.Cursor;
import android.os.RemoteException;
import android.util.Log;

import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.CallNote;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.ui.NotesListAdapter.AppWidgetAttribute;

import java.util.ArrayList;
import java.util.HashSet;

// 数据工具类
public class DataUtils {
    public static final String TAG = "DataUtils";   // 日志标签

    // 批量删除笔记
    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
        if (ids == null) {
            Log.d(TAG, "the ids is null");// IDs为空
            return true;
        }
        if (ids.size() == 0) {
            Log.d(TAG, "no id is in the hashset");// 哈希集为空
            return true;
        }

        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();// 操作列表

        // 遍历每个ID
        for (long id : ids) {
            if(id == Notes.ID_ROOT_FOLDER) {
                Log.e(TAG, "Don't delete system folder root");// 不允许删除根文件夹
                continue;
            }

            // 创建删除操作
            ContentProviderOperation.Builder builder = ContentProviderOperation
                    .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
            operationList.add(builder.build());// 将操作添加到列表
        }

        // 执行批量操作
        try {
            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
            if (results == null || results.length == 0 || results[0] == null) {
                Log.d(TAG, "delete notes failed, ids:" + ids.toString());// 删除失败
                return false;
            }
            return true;// 删除成功
        } catch (RemoteException e) {
            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
        } catch (OperationApplicationException e) {
            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
        }
        return false;// 发生异常，删除失败
    }

    // 将笔记移动到指定文件夹
    public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
        ContentValues values = new ContentValues();
        values.put(NoteColumns.PARENT_ID, desFolderId);// 设置目标文件夹ID
        values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);// 设置源文件夹ID
        values.put(NoteColumns.LOCAL_MODIFIED, 1);// 标记为已修改
        resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);// 更新笔记信息
    }

    // 批量移动到指定文件夹
    public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
            long folderId) {
        if (ids == null) {
            Log.d(TAG, "the ids is null");// IDs为空
            return true;
        }

        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>(); // 操作列表

        // 遍历每个ID进行更新
        for (long id : ids) {
            ContentProviderOperation.Builder builder = ContentProviderOperation
                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
            builder.withValue(NoteColumns.PARENT_ID, folderId);// 设置目标文件夹ID
            builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);// 标记为已修改
            operationList.add(builder.build());// 将构建的操作添加到操作列表中
        }

        try {
            // 批量执行更新操作，并获取结果
            ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);
            if (results == null || results.length == 0 || results[0] == null) {
                // 如果更新失败，记录日志并返回false
                Log.d(TAG, "delete notes failed, ids:" + ids.toString());
                return false;
            }
            return true;// 更新成功，返回true
        } catch (RemoteException e) {
            // 捕获远程异常，记录错误日志
            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
        } catch (OperationApplicationException e) {
            // 捕获操作应用异常，记录错误日志
            Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
        }
        return false;// 如果发生异常，返回false
    }

    /**
     * Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}}
     */
    /**
     * 获取用户文件夹的数量，不包括系统文件夹 {@link Notes#TYPE_SYSTEM}
     */
    public static int getUserFolderCount(ContentResolver resolver) {
        Cursor cursor =resolver.query(Notes.CONTENT_NOTE_URI,
                new String[] { "COUNT(*)" }, // 查询计算数量
                NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
                new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
                null);

        int count = 0; // 初始化数量
        if(cursor != null) {
            if(cursor.moveToFirst()) {// 如果查询成功
                try {
                    count = cursor.getInt(0);// 获取数量
                } catch (IndexOutOfBoundsException e) { // 捕获索引越界异常
                    Log.e(TAG, "get folder count failed:" + e.toString());
                } finally {
                    cursor.close();  // 最后关闭光标
                }
            }
        }
        return count;// 返回文件夹数量
    }

    /**
     * 检查在笔记数据库中笔记的可见性
     * @param resolver 内容解析器
     * @param noteId 笔记ID
     * @param type 笔记类型
     * @return 如果笔记存在且可见，返回true；否则返回false
     */
    public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) {
        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
                null,
                NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER,
                new String [] {String.valueOf(type)},// 查询条件
                null);

        boolean exist = false;// 标记存在性为false
        if (cursor != null) {
            if (cursor.getCount() > 0) {// 如果查询到记录
                exist = true;// 标记为存在
            }
            cursor.close(); // 关闭光标
        }
        return exist; // 返回结果
    }

    /**
     * 检查笔记是否存在于数据库中
     * @param resolver 内容解析器
     * @param noteId 笔记ID
     * @return 如果笔记存在返回true，否者返回false
     */
    public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) {
        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId),
                null, null, null, null);

        boolean exist = false;// 标记存在性为false
        if (cursor != null) {
            if (cursor.getCount() > 0) {// 如果查询到记录
                exist = true; // 标记为存在
            }
            cursor.close();// 关闭光标
        }
        return exist;// 返回结果
    }

    /**
     * 检查数据是否存在于数据数据库中
     * @param resolver 内容解析器
     * @param dataId 数据ID
     * @return 如果数据存在返回true，否者返回false
     */
    public static boolean existInDataDatabase(ContentResolver resolver, long dataId) {
        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId),
                null, null, null, null);

        boolean exist = false;// 标记存在性为false
        if (cursor != null) {
            if (cursor.getCount() > 0) {// 如果查询到记录
                exist = true;// 标记为存在
            }
            cursor.close();// 关闭光标
        }
        return exist; // 返回结果
    }

    /**
     * 检查指定名称的文件夹是否可见（存在且不是垃圾桶）
     * @param resolver 内容解析器
     * @param name 文件夹名称
     * @return 如果文件夹存在返回true，否者返回false
     */
    public static boolean checkVisibleFolderName(ContentResolver resolver, String name) {
        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null,
                NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER +
                " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER +
                " AND " + NoteColumns.SNIPPET + "=?",
                new String[] { name }, null);
        boolean exist = false; // 标记存在性为false
        if(cursor != null) {
            if(cursor.getCount() > 0) { // 如果查询到记录
                exist = true;// 标记为存在
            }
            cursor.close();// 关闭光标
        }
        return exist;// 返回结果
    }

    /**
     * 获取某个文件夹中笔记小部件的属性
     * @param resolver 内容解析器
     * @param folderId 文件夹ID
     * @return 返回文件夹中的小部件属性集合
     */
    public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
        // 查询数据库，从笔记内容URI获取小部件ID和小部件类型
        Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
                new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
                NoteColumns.PARENT_ID + "=?", // 筛选条件为文件夹ID
                new String[] { String.valueOf(folderId) },
                null);

        HashSet<AppWidgetAttribute> set = null;// 初始化小部件集合
        if (c != null) {
            if (c.moveToFirst()) {// 如果查询结果有记录
                set = new HashSet<AppWidgetAttribute>();// 创建一个HashSet来存储小部件属性
                do {
                    try {
                        AppWidgetAttribute widget = new AppWidgetAttribute();// 创建新的小部件属性对象
                        widget.widgetId = c.getInt(0);// 设置小部件ID
                        widget.widgetType = c.getInt(1);// 设置小部件类型
                        set.add(widget);// 将小部件属性添加到集合中
                    } catch (IndexOutOfBoundsException e) { // 捕获索引越界异常
                        Log.e(TAG, e.toString());// 记录错误日志
                    }
                } while (c.moveToNext());// 继续遍历查询结果
            }
            c.close();// 关闭光标
        }
        return set; // 返回小部件属性集合
    }

    // 根据笔记ID获取通话电话号码
    public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
        // 查询数据库，根据笔记ID获取通话电话号码
        Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
                new String [] { CallNote.PHONE_NUMBER },
                CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",// 筛选条件
                new String [] { String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE },
                null);

        if (cursor != null && cursor.moveToFirst()) {// 如果查询成功
            try {
                return cursor.getString(0);// 返回通话电话号码
            } catch (IndexOutOfBoundsException e) {// 捕获索引越界异常
                Log.e(TAG, "Get call number fails " + e.toString());// 记录错误日志
            } finally {
                cursor.close();// 最后关闭光标
            }
        }
        return "";// 如果未找到，返回空字符串
    }

    // 根据电话号码和通话日期获取笔记ID
    public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
        // 查询数据库，根据电话号码和通话日期获取笔记ID
        Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
                new String [] { CallNote.NOTE_ID },
                CallNote.CALL_DATE + "=? AND " + CallNote.MIME_TYPE + "=? AND PHONE_NUMBERS_EQUAL("
                + CallNote.PHONE_NUMBER + ",?)",// 筛选条件
                new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
                null);

        if (cursor != null) {
            if (cursor.moveToFirst()) {// 如果查询结果有记录
                try {
                    return cursor.getLong(0);// 返回笔记ID
                } catch (IndexOutOfBoundsException e) {// 捕获索引越界异常
                    Log.e(TAG, "Get call note id fails " + e.toString());// 记录错误日志
                }
            }
            cursor.close();// 关闭光标
        }
        return 0;// 如果未找到，返回0
    }

    // 根据笔记ID获取笔记的简短内容（片段）
    public static String getSnippetById(ContentResolver resolver, long noteId) {
        // 查询数据库，根据笔记ID获取简短内容
        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
                new String [] { NoteColumns.SNIPPET },
                NoteColumns.ID + "=?",// 筛选条件
                new String [] { String.valueOf(noteId)},
                null);

        if (cursor != null) {
            String snippet = "";// 初始化简短内容变量
            if (cursor.moveToFirst()) {// 如果查询成功
                snippet = cursor.getString(0);// 获取简短内容
            }
            cursor.close();// 关闭光标
            return snippet;// 返回简短内容
        }
        // 如果未找到，抛出异常
        throw new IllegalArgumentException("Note is not found with id: " + noteId);
    }

    // 格式化笔记的简短内容，去除多余空白并截取至换行符前
    public static String getFormattedSnippet(String snippet) {
        if (snippet != null) {
            snippet = snippet.trim(); // 去除前后空白
            int index = snippet.indexOf('\n');// 查找换行符索引
            if (index != -1) {
                snippet = snippet.substring(0, index);// 截取至换行符前的内容
            }
        }
        return snippet;// 返回格式化后的内容
    }
}
