//
//  FLExploreKeywordViewModel.m
//  FirstLink
//
//  Created by jack on 15/8/21.
//  Copyright (c) 2015年 FirstLink. All rights reserved.
//

#import "FLExploreKeywordViewModel.h"
#import "FKExploreConditionItem.h"

static NSInteger const FK_EXPLORE_KEYWORD_LIMIT_COUNT = 8;

@implementation FLExploreKeywordViewModel

- (instancetype)init {
    self = [super init];
    if (self) {
        _keywordArray = [self queryKeywordsFromDB];
    }
    return self;
}

- (BOOL)insertKeywordToDB:(NSString *)keyword createTime:(NSString *)createTime {
    if (!keyword || keyword.length == 0) {
        return NO;
    }
    
    FMDatabase* db = [FLDataCenter defaultDatabase];
    if ([db open]) {
        
        [db beginTransaction];
        NSString *deleteSQL = [NSString stringWithFormat:@"DELETE FROM %@ WHERE %@ = ?"
                               , FK_TABLE_NAME_FOR_EXPLORE_HISTORY
                               , FK_EXPLORE_KEYWORD_FIELD_KEYWORD];
        NSString *insertSQL = [NSString stringWithFormat:@"INSERT INTO %@ (%@, %@) VALUES (?, ?)"
                               , FK_TABLE_NAME_FOR_EXPLORE_HISTORY
                               , FK_EXPLORE_KEYWORD_FIELD_KEYWORD
                               , FK_EXPLORE_KEYWORD_FIELD_CREATE_TIME];
        
        [db executeUpdate:deleteSQL, [FLStringHelper replaceNilWithEmpty:keyword]];
        [db executeUpdate:insertSQL, [FLStringHelper replaceNilWithEmpty:keyword], [FLStringHelper replaceNilWithEmpty:createTime]];
        
        return [db commit];
    }
    return NO;
}

- (NSArray *)queryKeywordsFromDB {
    FMDatabase *db = [FLDataCenter defaultDatabase];
    NSString *querySQL = [NSString stringWithFormat:@"SELECT * FROM %@ ORDER BY id DESC LIMIT %ld"
                          , FK_TABLE_NAME_FOR_EXPLORE_HISTORY
                          , (long)FK_EXPLORE_KEYWORD_LIMIT_COUNT];
    
    FKExploreKeyword *item;
    NSMutableArray *mutableArray = [NSMutableArray array];
    
    FMResultSet *rs = [db executeQuery:querySQL];
    while ([rs next]) {
        item = [FKExploreKeyword new];
        item.primaryKey = [rs intForColumn:FK_EXPLORE_KEYWORD_FIELD_PRIMARYKEY];
        item.keyword = [rs stringForColumn:FK_EXPLORE_KEYWORD_FIELD_KEYWORD];
        item.createTime = [rs stringForColumn:FK_EXPLORE_KEYWORD_FIELD_CREATE_TIME];
        
        [mutableArray addObject:item];
    }
    [rs close];
    
    if (mutableArray.count >= FK_EXPLORE_KEYWORD_LIMIT_COUNT) {
        item = mutableArray.lastObject;
        NSString *deleteSQL = [NSString stringWithFormat:@"DELETE FROM %@ WHERE id < %ld"
                               , FK_TABLE_NAME_FOR_EXPLORE_HISTORY
                               , (long)item.primaryKey];
        [db executeUpdate:deleteSQL];
    }
    
    return mutableArray;
}

- (BOOL)deleteAllKeywordsInDB {
    return [[FLDataCenter defaultDatabase] executeUpdate:[NSString stringWithFormat:@"DELETE FROM %@", FK_TABLE_NAME_FOR_EXPLORE_HISTORY]];
}

- (NSString *)keywordTextAtIndex:(NSInteger)index {
    if (index < self.keywordArray.count) {
        FKExploreKeyword *item = self.keywordArray[index];
        return item.keyword;
    }
    return @"";
}

- (NSString *)hotKeywordTextAtIndex:(NSInteger)index {
    if (index < self.hotKeywordArray.count) {
        return self.hotKeywordArray[index];
    }
    return nil;
}

- (NSString *)sectionTitleAtSection:(NSInteger)section {
    if (section == 0) {
        return @"热门搜索";
    }
    return @"历史搜索";
}

- (NSString *)titleAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section == 0) {
        return [self hotKeywordTextAtIndex:indexPath.row];
    }
    return [self keywordTextAtIndex:indexPath.row];
}

#pragma mark - Brand API

- (NSInteger)insertIntoBrandTable:(NSArray<NSString *> *)brands {
    if (!brands || brands.count == 0) {
        return 0;
    }
    
    FMDatabase* db = [FLDataCenter defaultDatabase];
    if ([db open]) {
        
        [db beginTransaction];
        NSString *deleteSQL = [NSString stringWithFormat:@"DELETE FROM %@"
                               , FK_TABLE_NAME_FOR_EXPLORE_LOCAL_BRAND];
        [db executeUpdate:deleteSQL];
        
        NSString *insertSQL;
        for (NSString *brandName in brands) {
            insertSQL = [NSString stringWithFormat:@"INSERT INTO %@ (%@) VALUES (?)", FK_TABLE_NAME_FOR_EXPLORE_LOCAL_BRAND, FK_EXPLORE_BRAND_FIELD_NAME];
            [db executeUpdate:insertSQL, brandName];
        }
        BOOL isSuccess = [db commit];
        return (isSuccess ? brands.count : 0);
    }
    return 0;
}

- (NSArray<FKExploreConditionItem*> *)queryBrandsStartWith:(NSString *)prefix {
    if (prefix.length > 0) {
        FMDatabase* db = [FLDataCenter defaultDatabase];
        if ([db open]) {
            NSString *querySQL = [NSString stringWithFormat:@"SELECT %@ FROM %@ WHERE %@ LIKE '%@\%%'"
                                  , FK_EXPLORE_BRAND_FIELD_NAME
                                  , FK_TABLE_NAME_FOR_EXPLORE_LOCAL_BRAND
                                  , FK_EXPLORE_BRAND_FIELD_NAME
                                  , prefix];
            FKExploreConditionItem *item;
            NSMutableArray *mutableArray = [NSMutableArray array];
            
            FMResultSet *rs = [db executeQuery:querySQL];
            while ([rs next]) {
                item = [FKExploreConditionItem new];
                item.type = FKExploreConditionTypeKeyword;
                item.name = [rs stringForColumn:FK_EXPLORE_BRAND_FIELD_NAME];
                
                [mutableArray addObject:item];
            }
            [db close];
            
            return mutableArray;
        }
    }
    return nil;
}

@end