#import "DatabaseAdapter.h"

@implementation DatabaseAdapter

- (id) init {
    
    if (self = [super init]) {
        [self createDatabase];
    }
    return self;
}

static DatabaseAdapter *sharedManager = nil;

+ (DatabaseAdapter *)shareManager {
    static dispatch_once_t once;
    dispatch_once(&once, ^{
        sharedManager = [[self alloc]init];
        [sharedManager createDatabase];
    });
    return sharedManager;
}

//建立資料庫
- (void) createDatabase {
    
    NSString * writableDBPath = [self applicationDocumentsDirecrotyFile];
    const char* cpath = [writableDBPath UTF8String];
    
    if (sqlite3_open(cpath, &db) != SQLITE_OK) {
        sqlite3_close(db);
        NSAssert(NO, @"資料庫開啟失敗");
    } else {
        char *err;
        NSString *sql = [NSString stringWithFormat:@"CREATE TABLE IF NOT EXISTS note(_id integer primary key autoincrement, title text, content text, createDate text, updateDate text)"];
        const char* cSql = [sql UTF8String];
        
        if (sqlite3_exec(db, cSql, NULL, NULL, &err) != SQLITE_OK) {
            sqlite3_close(db);
            NSAssert(NO, @"建表失敗");
        }
        sqlite3_close(db);
    }
}

//新增資料
- (void) create:(Note *)note {
    NSString *path = [self applicationDocumentsDirecrotyFile];
    const char* cpath = [path UTF8String];
    
    if (sqlite3_open(cpath, &db) != SQLITE_OK) {
        sqlite3_close(db);
        NSAssert(NO, @"資料庫開啟失敗");
    } else {
        NSString *sql = @"insert into note(title, content, createDate, updateDate)values(?,?,?,?)";
        const char* cSql = [sql UTF8String];
        
        sqlite3_stmt *statement;
        if (sqlite3_prepare_v2(db, cSql, -1, &statement, NULL) == SQLITE_OK) {
            const char* cTitle = [note.title UTF8String];
            const char* cContent = [note.content UTF8String];
            const char* cCreateDate = [note.createDate UTF8String];
            const char* cUpdateDate = [note.updateDate UTF8String];
            
            //繫結引數
            sqlite3_bind_text(statement, 1, cTitle, -1, NULL);
            sqlite3_bind_text(statement, 2, cContent, -1, NULL);
            sqlite3_bind_text(statement, 3, cCreateDate, -1, NULL);
            sqlite3_bind_text(statement, 4, cUpdateDate, -1, NULL);
            
            //執行插入
            if (sqlite3_step(statement) != SQLITE_DONE) {
                NSAssert(NO, @"插入資料失敗");
            }
        }
        sqlite3_finalize(statement);
        sqlite3_close(db);
    }
}

//刪除資料
- (void) remove:(int) _id {
    NSString *path = [self applicationDocumentsDirecrotyFile];
    const char* cpath = [path UTF8String];
    
    if (sqlite3_open(cpath, &db) != SQLITE_OK) {
        sqlite3_close(db);
        NSAssert(NO, @"資料庫開啟失敗");
    } else {
        NSString *sql = @"delete from note where _id = ?";
        const char* cSql = [sql UTF8String];
        
        sqlite3_stmt *statement;
        if (sqlite3_prepare_v2(db, cSql, -1, &statement, NULL) == SQLITE_OK) {
            sqlite3_bind_int(statement, 1, _id);
            
            if (sqlite3_step(statement) != SQLITE_DONE) {
                NSAssert(NO, @"插入資料失敗");
            }
        }
        sqlite3_finalize(statement);
        sqlite3_close(db);
    }
}

//更新資料
- (void) update:(Note *) note {
    NSString *path = [self applicationDocumentsDirecrotyFile];
    const char* cpath = [path UTF8String];
    
    if (sqlite3_open(cpath, &db) != SQLITE_OK) {
        sqlite3_close(db);
        NSAssert(NO, @"資料庫開啟失敗");
    } else {
        NSString *sql = @"update note set title = ?, content = ?, updateDate = ? where _id = ?";
        const char* cSql = [sql UTF8String];
        
        sqlite3_stmt *statement;
        if (sqlite3_prepare_v2(db, cSql, -1, &statement, NULL) == SQLITE_OK) {
            const char* cTitle = [note.title UTF8String];
            const char* cContent = [note.content UTF8String];
            const char* cUpdateDate = [note.updateDate UTF8String];
            
            sqlite3_bind_text(statement, 1, cTitle, -1, NULL);
            sqlite3_bind_text(statement, 2, cContent, -1, NULL);
            sqlite3_bind_text(statement, 3, cUpdateDate, -1, NULL);
            sqlite3_bind_int(statement, 4, note._id);
            if (sqlite3_step(statement) != SQLITE_DONE) {
                NSAssert(NO, @"插入資料失敗");
            }
        }
        sqlite3_finalize(statement);
        sqlite3_close(db);

    }
}

//按id查詢資料
- (Note *) findById:(int) _id {
    NSString *path = [self applicationDocumentsDirecrotyFile];
    const char* cpath = [path UTF8String];
    
    if (sqlite3_open(cpath, &db) != SQLITE_OK) {
        sqlite3_close(db);
        NSAssert(NO, @"資料庫開啟失敗");
    } else {
        NSString *sql = @"select _id, title, content, createDate, updateDate from note where _id = ?";
        const char* cSql = [sql UTF8String];
        
        sqlite3_stmt *statement;
        if (sqlite3_prepare_v2(db, cSql, -1, &statement, NULL) == SQLITE_OK) {
            sqlite3_bind_int(statement, 1, _id);
            
            //執行
            if(sqlite3_step(statement) == SQLITE_ROW) {
                //id
                int cId = sqlite3_column_int(statement, 0);
                //標題
                char* cTitle = (char*)sqlite3_column_text(statement, 1);
                NSString *title = [[NSString alloc] initWithUTF8String:cTitle];
                //內容
                char* cContent = (char*)sqlite3_column_text(statement, 2);
                NSString *content = [[NSString alloc] initWithUTF8String:cContent];
                //建立時間
                char* cCreateDate = (char*)sqlite3_column_text(statement, 3);
                NSString *createDate = [[NSString alloc] initWithUTF8String:cCreateDate];
                //更新時間
                char* cUpdateDate = (char*)sqlite3_column_text(statement, 4);
                NSString *updateDate = [[NSString alloc] initWithUTF8String:cUpdateDate];
                
                Note *note = [[Note alloc] initWithID:cId title:title content:content createDate:createDate updateDate:updateDate];
                
                sqlite3_finalize(statement);
                sqlite3_close(db);
                
                return note;
            }
        }
        sqlite3_finalize(statement);
        sqlite3_close(db);
    }
    return nil;
}

//查詢所有資料
- (NSMutableArray *) findAll {
    NSMutableArray *listData = [[NSMutableArray alloc] init];
    
    NSString *path = [self applicationDocumentsDirecrotyFile];
    const char* cpath = [path UTF8String];
    
    if (sqlite3_open(cpath, &db) != SQLITE_OK) {
        sqlite3_close(db);
        NSAssert(NO, @"資料庫開啟失敗");
    } else {
        NSString *sql = @"select _id, title, content, createDate, updateDate from note";
        const char* cSql = [sql UTF8String];
        
        sqlite3_stmt *statement;
        if (sqlite3_prepare_v2(db, cSql, -1, &statement, NULL) == SQLITE_OK) {
            
            //執行
            while(sqlite3_step(statement) == SQLITE_ROW) {
                //id
                int cId = sqlite3_column_int(statement, 0);
                //標題
                char* cTitle = (char*)sqlite3_column_text(statement, 1);
                NSString *title = [[NSString alloc] initWithUTF8String:cTitle];
                //內容
                char* cContent = (char*)sqlite3_column_text(statement, 2);
                NSString *content = [[NSString alloc] initWithUTF8String:cContent];
                //建立時間
                char* cCreateDate = (char*)sqlite3_column_text(statement, 3);
                NSString *createDate = [[NSString alloc] initWithUTF8String:cCreateDate];
                //更新時間
                char* cUpdateDate = (char*)sqlite3_column_text(statement, 4);
                NSString *updateDate = [[NSString alloc] initWithUTF8String:cUpdateDate];
                
                Note *note = [[Note alloc] initWithID:cId title:title content:content createDate:createDate updateDate:updateDate];
                
                [listData addObject:note];
            }
        }
        sqlite3_finalize(statement);
        sqlite3_close(db);
    }
    return listData;
}

//分頁查詢
//limit:查詢條數
//ship:跳過條數
- (NSMutableArray *) findLimit:(int) limit withSkip:(int) skip {
    NSMutableArray *listData = [[NSMutableArray alloc] init];
    
    NSString *path = [self applicationDocumentsDirecrotyFile];
    const char* cpath = [path UTF8String];
    
    if (sqlite3_open(cpath, &db) != SQLITE_OK) {
        sqlite3_close(db);
        NSAssert(NO, @"資料庫開啟失敗");
    } else {
        NSString *sql = @"select _id, title, content, createDate, updateDate from note limit ? offset ?";
        const char* cSql = [sql UTF8String];
        
        sqlite3_stmt *statement;
        if (sqlite3_prepare_v2(db, cSql, -1, &statement, NULL) == SQLITE_OK) {
            sqlite3_bind_int(statement, 1, limit);
            sqlite3_bind_int(statement, 2, skip);
            
            //執行
            while(sqlite3_step(statement) == SQLITE_ROW) {
                //id
                int cId = sqlite3_column_int(statement, 0);
                //標題
                char* cTitle = (char*)sqlite3_column_text(statement, 1);
                NSString *title = [[NSString alloc] initWithUTF8String:cTitle];
                //內容
                char* cContent = (char*)sqlite3_column_text(statement, 2);
                NSString *content = [[NSString alloc] initWithUTF8String:cContent];
                //建立時間
                char* cCreateDate = (char*)sqlite3_column_text(statement, 3);
                NSString *createDate = [[NSString alloc] initWithUTF8String:cCreateDate];
                //更新時間
                char* cUpdateDate = (char*)sqlite3_column_text(statement, 4);
                NSString *updateDate = [[NSString alloc] initWithUTF8String:cUpdateDate];
                
                Note *note = [[Note alloc] initWithID:cId title:title content:content createDate:createDate updateDate:updateDate];
                
                [listData addObject:note];
            }
        }
        sqlite3_finalize(statement);
        sqlite3_close(db);
    }
    return listData;
}


//獲取資料庫路徑
- (NSString *) applicationDocumentsDirecrotyFile {
    
    NSArray * documentDirectory = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    
    NSString * myDocPath = [documentDirectory objectAtIndex:0];
    NSString * writableFile = [myDocPath stringByAppendingPathComponent:@"note.db"];
    
    return writableFile;
}

@end