/*
 * 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;


/**
 * DataUtils - 数据工具类
 * <p>
 * 提供便签数据的各种操作方法，包括批量删除、移动、查询、验证等
 * 所有方法均为静态方法，方便直接调用
 * </p>
 * 
 * @author MiCode Open Source Community
 * @version 1.0
 */
public class DataUtils {
    public static final String TAG = "DataUtils";  // 日志标签
    
    /**
     * 批量删除便签
     * <p>
     * 通过ContentProvider批量删除指定ID的便签
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param ids 要删除的便签ID集合
     * @return 删除是否成功
     */
    public static boolean batchDeleteNotes(ContentResolver resolver, HashSet<Long> ids) {
        if (ids == null) {
            Log.d(TAG, "the ids is null");
            return true;
        }
        if (ids.size() == 0) {
            Log.d(TAG, "no id is in the hashset");
            return true;
        }

        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
        for (long id : ids) {
            if(id == Notes.ID_ROOT_FOLDER) {
                Log.e(TAG, "Don't delete system folder root");
                continue;
            }
            ContentProviderOperation.Builder builder = ContentProviderOperation
                    .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
            operationList.add(builder.build());
        }
        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());
                return false;
            }
            return true;
        } 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;
    }

    /**
     * 移动便签到指定文件夹
     * <p>
     * 更新便签的父文件夹ID，并标记为本地修改
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param id 便签ID
     * @param srcFolderId 源文件夹ID
     * @param desFolderId 目标文件夹ID
     */
    public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) {
        ContentValues values = new ContentValues();
        values.put(NoteColumns.PARENT_ID, desFolderId);
        values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId);
        values.put(NoteColumns.LOCAL_MODIFIED, 1);
        resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null);
    }

    /**
     * 批量移动便签到指定文件夹
     * <p>
     * 通过ContentProvider批量更新便签的父文件夹ID
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param ids 要移动的便签ID集合
     * @param folderId 目标文件夹ID
     * @return 移动是否成功
     */
    public static boolean batchMoveToFolder(ContentResolver resolver, HashSet<Long> ids,
            long folderId) {
        if (ids == null) {
            Log.d(TAG, "the ids is null");
            return true;
        }

        // 检查目标ID是否是一个文件夹（TYPE_FOLDER或TYPE_SYSTEM）
        Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, folderId),
                new String[] { NoteColumns.TYPE },
                null,
                null,
                null);
        
        boolean isFolder = false;
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                int type = cursor.getInt(0);
                if (type == Notes.TYPE_FOLDER || type == Notes.TYPE_SYSTEM) {
                    isFolder = true;
                }
            }
            cursor.close();
        }
        
        if (!isFolder) {
            Log.d(TAG, "target id is not a folder: " + folderId);
            return false;
        }

        ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
        for (long id : ids) {
            ContentProviderOperation.Builder builder = ContentProviderOperation
                    .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id));
            builder.withValue(NoteColumns.PARENT_ID, folderId);
            builder.withValue(NoteColumns.LOCAL_MODIFIED, 1);
            operationList.add(builder.build());
        }

        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());
                return false;
            }
            return true;
        } 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;
    }

    /**
     * 获取用户文件夹数量
     * <p>
     * 获取除系统文件夹外的所有文件夹数量
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @return 用户文件夹数量
     */
    public static int getUserFolderCount(ContentResolver resolver) {
        Cursor cursor =resolver.query(Notes.CONTENT_NOTE_URI,
                new String[] { "COUNT(*)" },
                NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?",
                new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)},
                null);

        int count = 0;
        if(cursor != null) {
            if(cursor.moveToFirst()) {
                try {
                    count = cursor.getInt(0);
                } catch (IndexOutOfBoundsException e) {
                    Log.e(TAG, "get folder count failed:" + e.toString());
                } finally {
                    cursor.close();
                }
            }
        }
        return count;
    }

    /**
     * 检查便签是否在数据库中可见
     * <p>
     * 检查指定类型的便签是否存在于数据库中且不在回收站
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param noteId 便签ID
     * @param type 便签类型
     * @return 是否可见
     */
    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)},
                null);

        boolean exist = false;
        if (cursor != null) {
            if (cursor.getCount() > 0) {
                exist = true;
            }
            cursor.close();
        }
        return exist;
    }

    /**
     * 检查便签是否存在于数据库中
     * <p>
     * 检查指定ID的便签是否存在于数据库中
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param noteId 便签ID
     * @return 是否存在
     */
    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;
        if (cursor != null) {
            if (cursor.getCount() > 0) {
                exist = true;
            }
            cursor.close();
        }
        return exist;
    }

    /**
     * 检查数据是否存在于数据库中
     * <p>
     * 检查指定ID的数据是否存在于数据库中
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param dataId 数据ID
     * @return 是否存在
     */
    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;
        if (cursor != null) {
            if (cursor.getCount() > 0) {
                exist = true;
            }
            cursor.close();
        }
        return exist;
    }

    /**
     * 检查可见文件夹名称是否存在
     * <p>
     * 检查除回收站外的文件夹中是否已存在指定名称的文件夹
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param name 文件夹名称
     * @return 是否存在
     */
    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;
        if(cursor != null) {
            if(cursor.getCount() > 0) {
                exist = true;
            }
            cursor.close();
        }
        return exist;
    }

    /**
     * 获取文件夹下的便签小部件
     * <p>
     * 查询指定文件夹下所有便签关联的小部件信息
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param folderId 文件夹ID
     * @return 小部件属性集合
     */
    public static HashSet<AppWidgetAttribute> getFolderNoteWidget(ContentResolver resolver, long folderId) {
        Cursor c = resolver.query(Notes.CONTENT_NOTE_URI,
                new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE },
                NoteColumns.PARENT_ID + "=?",
                new String[] { String.valueOf(folderId) },
                null);

        HashSet<AppWidgetAttribute> set = null;
        if (c != null) {
            if (c.moveToFirst()) {
                set = new HashSet<AppWidgetAttribute>();
                do {
                    try {
                        AppWidgetAttribute widget = new AppWidgetAttribute();
                        widget.widgetId = c.getInt(0);
                        widget.widgetType = c.getInt(1);
                        set.add(widget);
                    } catch (IndexOutOfBoundsException e) {
                        Log.e(TAG, e.toString());
                    }
                } while (c.moveToNext());
            }
            c.close();
        }
        return set;
    }

    /**
     * 根据便签ID获取电话号码
     * <p>
     * 查询指定通话便签的电话号码
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param noteId 便签ID
     * @return 电话号码，不存在则返回空字符串
     */
    public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) {
        Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI,
                new String [] { CallNote.PHONE_NUMBER },
                CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?",
                new String [] { String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE },
                null);

        if (cursor != null && cursor.moveToFirst()) {
            try {
                return cursor.getString(0);
            } catch (IndexOutOfBoundsException e) {
                Log.e(TAG, "Get call number fails " + e.toString());
            } finally {
                cursor.close();
            }
        }
        return "";
    }

    /**
     * 根据电话号码和通话日期获取便签ID
     * <p>
     * 查询指定电话号码和通话日期对应的通话便签ID
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param phoneNumber 电话号码
     * @param callDate 通话日期
     * @return 便签ID，不存在则返回0
     */
    public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) {
        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 + ",?)",
                new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber },
                null);

        if (cursor != null) {
            if (cursor.moveToFirst()) {
                try {
                    return cursor.getLong(0);
                } catch (IndexOutOfBoundsException e) {
                    Log.e(TAG, "Get call note id fails " + e.toString());
                }
            }
            cursor.close();
        }
        return 0;
    }

    /**
     * 根据便签ID获取摘要
     * <p>
     * 查询指定便签的摘要内容
     * </p>
     * 
     * @param resolver ContentResolver对象
     * @param noteId 便签ID
     * @return 便签摘要
     * @throws IllegalArgumentException 当便签不存在时抛出
     */
    public static String getSnippetById(ContentResolver resolver, long noteId) {
        Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI,
                new String [] { NoteColumns.SNIPPET },
                NoteColumns.ID + "=?",
                new String [] { String.valueOf(noteId)},
                null);

        if (cursor != null) {
            String snippet = "";
            if (cursor.moveToFirst()) {
                snippet = cursor.getString(0);
            }
            cursor.close();
            return snippet;
        }
        throw new IllegalArgumentException("Note is not found with id: " + noteId);
    }

    /**
     * 格式化摘要
     * <p>
     * 去除摘要前后空格，并只保留第一行
     * </p>
     * 
     * @param snippet 原始摘要
     * @return 格式化后的摘要
     */
    public static String getFormattedSnippet(String snippet) {
        if (snippet != null) {
            snippet = snippet.trim();
            int index = snippet.indexOf('\n');
            if (index != -1) {
                snippet = snippet.substring(0, index);
            }
        }
        return snippet;
    }
}