package net.micode.notes.model;

import android.appwidget.AppWidgetManager;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.text.TextUtils;
import android.util.Log;

import net.micode.notes.data.Notes;
import net.micode.notes.data.Notes.CallNote;
import net.micode.notes.data.Notes.DataColumns;
import net.micode.notes.data.Notes.DataConstants;
import net.micode.notes.data.Notes.NoteColumns;
import net.micode.notes.data.Notes.TextNote;
import net.micode.notes.tool.ResourceParser.NoteBgResources;


public class WorkingNote {
    // Note for the working 
    private Note mNote;
    // Note Id
    private long mNoteId;
    // Note content
    private String mContent;
    // Note mode
    private int mMode;

    private long mAlertDate;

    private long mModifiedDate;

    private int mBgColorId;

    private int mWidgetId;

    private int mWidgetType;

    private long mFolderId;

    private Context mContext;

    private static final String TAG = "WorkingNote";

    private boolean mIsDeleted;

    private NoteSettingChangedListener mNoteSettingStatusListener;

    public static final String[] DATA_PROJECTION = new String[] {
            DataColumns.ID,
            DataColumns.CONTENT,
            DataColumns.MIME_TYPE,
            DataColumns.DATA1,
            DataColumns.DATA2,
            DataColumns.DATA3,
            DataColumns.DATA4,
    };

    public static final String[] NOTE_PROJECTION = new String[] {
            NoteColumns.PARENT_ID,
            NoteColumns.ALERTED_DATE,
            NoteColumns.BG_COLOR_ID,
            NoteColumns.WIDGET_ID,
            NoteColumns.WIDGET_TYPE,
            NoteColumns.MODIFIED_DATE
    };

    private static final int DATA_ID_COLUMN = 0;

    private static final int DATA_CONTENT_COLUMN = 1;

    private static final int DATA_MIME_TYPE_COLUMN = 2;

    private static final int DATA_MODE_COLUMN = 3;

    private static final int NOTE_PARENT_ID_COLUMN = 0;

    private static final int NOTE_ALERTED_DATE_COLUMN = 1;

    private static final int NOTE_BG_COLOR_ID_COLUMN = 2;

    private static final int NOTE_WIDGET_ID_COLUMN = 3;

    private static final int NOTE_WIDGET_TYPE_COLUMN = 4;

    private static final int NOTE_MODIFIED_DATE_COLUMN = 5;

    // New note construct
    private WorkingNote(Context context, long folderId) {//定义了一个私有构造函数，接受context和long类型的folderid作为参数。
        mContext = context;//将传入的上下文赋值给类的成员变量mcontext
        mAlertDate = 0;//将提醒日期初始化为0，表示当前没有设置提醒。
        mModifiedDate = System.currentTimeMillis();//获取当前时间戳，并赋值给mmodifieddate，用于记录笔记的修改时间
        mFolderId = folderId;
        mNote = new Note();//创建一个类的实例并赋值
        mNoteId = 0;//初始化为零
        mIsDeleted = false;
        mMode = 0;
        mWidgetType = Notes.TYPE_WIDGET_INVALIDE;//将小部件类型设置为无效类型，表明当前笔记关联的小部件状态无效。
    }

    // Existing note construct
    private WorkingNote(Context context, long noteId, long folderId) {
        mContext = context;
        mNoteId = noteId;//明确初始化
        mFolderId = folderId;
        mIsDeleted = false;
        mNote = new Note();
        loadNote();//此时mnoteid已可用
    }

    private void loadNote() {//定义了一个私有的方法
        Cursor cursor = mContext.getContentResolver().query(
                ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null,
                null, null);//定义好的表示笔记数据的内容URI，将mnoteid附加到该URI上，形成一个特定笔记的查询URI，都设null表示不指定额外条件和排序，查询结果会返回一个cursor对象，用于遍历查询得到的数据行

        if (cursor != null) {//判断查询结果
            if (cursor.moveToFirst()) {//将游标移动到查询结果集的第一行，若成功则进入这个if块执行后续操作
                mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN);
                mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN);
                mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN);
                mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN);
                mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN);
                mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN);//从查询结果的当前行中获取不同属性的值，并赋值给类的相应成员变量
            }
            cursor.close();
        } else {
            Log.e(TAG, "No note with id:" + mNoteId);
            throw new IllegalArgumentException("Unable to find note with id " + mNoteId);//若返回说明查询结果集为空，此时通过Log.e方法打印错误日志，然后抛出异常，提示找不到指定的ID笔记
        }
        loadNoteData();
    }

    private void loadNoteData() {//定义了一个私有方法
        Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION,
                DataColumns.NOTE_ID + "=?", new String[] {
                    String.valueOf(mNoteId)
                }, null);//表示数据所在的位置，指定要从查询结果中返回的列，查询NOTE-ID列等于某个值的记录，？会被后面的参数替换

        if (cursor != null) {//查询是否为空
            if (cursor.moveToFirst()) {
                do {
                    String type = cursor.getString(DATA_MIME_TYPE_COLUMN);//从当前行获取数据的MIME类型，存储在type变量中
                    if (DataConstants.NOTE.equals(type)) {
                        mContent = cursor.getString(DATA_CONTENT_COLUMN);//获取笔记内容并赋值给mcontent
                        mMode = cursor.getInt(DATA_MODE_COLUMN);//获取笔记内容并赋值
                        mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN));//从当前行获取数据ID并设置到mnote对象中
                    } else if (DataConstants.CALL_NOTE.equals(type)) {
                        mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN));//判断如果是通话笔记类型，则获取数据ID并设置到mnote对象的数据ID属性中
                    } else {
                        Log.d(TAG, "Wrong note type with type:" + type);
                    }
                } while (cursor.moveToNext());
            }
            cursor.close();
        } else {
            Log.e(TAG, "No data with id:" + mNoteId);
            throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId);
        }
    }//若查询结果集为空，没有找到对性的mnoteid的数据，此时提示找不到指定的ID的笔记数据

    public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId,
            int widgetType, int defaultBgColorId) {
        WorkingNote note = new WorkingNote(context, folderId);
        note.setBgColorId(defaultBgColorId);
        note.setWidgetId(widgetId);
        note.setWidgetType(widgetType);
        return note;
    }//创建一个空的workingnote对象分别调用三种方法，设置笔记的背景颜色ID,小部件ID和小部件类型

    public static WorkingNote load(Context context, long id) {
        return new WorkingNote(context, id, 0);
    }//接收context和id作为参数，直接通过调用对应的构造函数创建并返回一个working note对象，这三个参数含义需结合构造函数具体逻辑确定，推测可能是默认的文件夹id或其他默认标识

    public synchronized boolean saveNote() {
        if (isWorthSaving()) {
            if (!existInDatabase()) {
                if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) {
                    Log.e(TAG, "Create new note fail with id:" + mNoteId);
                    return false;
                }
            }

            mNote.syncNote(mContext, mNoteId);

            /**
             * Update widget content if there exist any widget of this note
             */
            if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
                    && mWidgetType != Notes.TYPE_WIDGET_INVALIDE
                    && mNoteSettingStatusListener != null) {
                mNoteSettingStatusListener.onWidgetChanged();
            }
            return true;
        } else {
            return false;
        }//判断笔记是否值得保存，接着判断笔记是否已存在于数据库中，如果不存在，调用函数获取一个新的笔记ID，并赋值给mnoteid，若获取id为0，说明创建笔记id失败，之后并将笔记数据同步到数据库
        
    }

    public boolean existInDatabase() {
        return mNoteId > 0;
    }//判断成员变量mnotedid是否大于0来确定，大于0则认为存在于数据库，直接返回该判断结果

    private boolean isWorthSaving() {
        if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent))
                || (existInDatabase() && !mNote.isLocalModified())) {
            return false;
        } else {
            return true;
        }
    }//通过多个条件组合判断，若满足任一条件则返回false，表示不值得保存

    public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) {
        mNoteSettingStatusListener = l;
    }//接受一个类型的参数1，并将其赋值给成员变量，以便在相关设置状态改变时出发监听器的方法

    public void setAlertDate(long date, boolean set) {
        if (date != mAlertDate) {
            mAlertDate = date;
            mNote.setNoteValue(NoteColumns.ALERTED_DATE, String.valueOf(mAlertDate));
        }
        if (mNoteSettingStatusListener != null) {
            mNoteSettingStatusListener.onClockAlertChanged(date, set);
        }
    }//判断传入日期与当前记录的提醒日期是否不同，若不同，将提醒日期更新传入date，检查是否为空，若不为空调用其方法，通过监听器提醒日期已改变，并传入新日期和设置标识

    public void markDeleted(boolean mark) {
        mIsDeleted = mark;
        if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID
                && mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) {
                mNoteSettingStatusListener.onWidgetChanged();
        }
    }//用于标识笔记是否已删除，并在满足特定条件时通知监听器


    public void setBgColorId(int id) {
        if (id != mBgColorId) {
            mBgColorId = id;
            if (mNoteSettingStatusListener != null) {
                mNoteSettingStatusListener.onBackgroundColorChanged();
            }
            mNote.setNoteValue(NoteColumns.BG_COLOR_ID, String.valueOf(id));
        }
    }//用于设置笔记的背景ID并在必要时通知监听器以及更新笔记数据
    public void setCheckListMode(int mode) {
        if (mMode != mode) {
            if (mNoteSettingStatusListener != null) {
                mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode);
            }
            mMode = mode;
            mNote.setTextData(TextNote.MODE, String.valueOf(mMode));
        }
    }//用于设置笔记的清单模式，并在必要时通知监听器以及更新笔记数据

    public void setWidgetType(int type) {
        if (type != mWidgetType) {
            mWidgetType = type;
            mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType));
        }
    }//用于设置笔记关联小部件的类型

    public void setWidgetId(int id) {
        if (id != mWidgetId) {
            mWidgetId = id;
            mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId));
        }
    }//用于设置笔记关联小部件的ID

    public void setWorkingText(String text) {
        if (!TextUtils.equals(mContent, text)) {
            mContent = text;
            mNote.setTextData(DataColumns.CONTENT, mContent);
        }
    }//用于设置笔记的文本内容

    public void convertToCallNote(String phoneNumber, long callDate) {
        mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate));
        mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber);
        mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER));
    }//将当前笔记转换为通话笔记设置相关通话信息

    public boolean hasClockAlert() {
        return (mAlertDate > 0 ? true : false);
    }

    public String getContent() {
        return mContent;
    }

    public long getAlertDate() {
        return mAlertDate;
    }

    public long getModifiedDate() {
        return mModifiedDate;
    }

    public int getBgColorResId() {
        return NoteBgResources.getNoteBgResource(mBgColorId);
    }

    public int getBgColorId() {
        return mBgColorId;
    }

    public int getTitleBgResId() {
        return NoteBgResources.getNoteTitleBgResource(mBgColorId);
    }

    public int getCheckListMode() {
        return mMode;
    }

    public long getNoteId() {
        return mNoteId;
    }

    public long getFolderId() {
        return mFolderId;
    }

    public int getWidgetId() {
        return mWidgetId;
    }

    public int getWidgetType() {
        return mWidgetType;
    }

    public interface NoteSettingChangedListener {
        /**
         * Called when the background color of current note has just changed
         */
        void onBackgroundColorChanged();

        /**
         * Called when user set clock
         */
        void onClockAlertChanged(long date, boolean set);

        /**
         * Call when user create note from widget
         */
        void onWidgetChanged();

        /**
         * Call when switch between check list mode and normal mode
         * @param oldMode is previous mode before change
         * @param newMode is new mode
         */
        void onCheckListModeChanged(int oldMode, int newMode);
    }
}