# coding=utf-8


import re
from collections import defaultdict

import pymysql


def read_sql_inserts(file_path):
    """生成器函数，逐行读取INSERT语句"""
    with open(file_path, 'r', encoding='utf-8') as f:
        for line in f:
            line = line.strip()
            if line.startswith('INSERT INTO'):
                yield line


def process_large_sql_file(input_file, batch_size=10000):
    table_data = defaultdict(lambda: {
        'columns': None,
        'value_rows': []
    })

    insert_pattern = re.compile(
        r'INSERT\s+INTO\s+`?([a-zA-Z_][a-zA-Z0-9_]*)`?\s*\((.*?)\)\s*VALUES\s*\((.*?)\);',
        re.IGNORECASE
    )

    # 使用生成器处理
    for insert_stmt in read_sql_inserts(input_file):
        match = insert_pattern.match(insert_stmt)
        if match:
            table_name = match.group(1)
            columns = match.group(2)
            values = match.group(3)

            if table_data[table_name]['columns'] is None:
                table_data[table_name]['columns'] = columns

            table_data[table_name]['value_rows'].append(values)

    # 生成批量INSERT语句
    batch_inserts = {}
    for table_name, data in table_data.items():
        columns = data['columns']
        value_rows = data['value_rows']

        for i in range(0, len(value_rows), batch_size):
            batch_values = value_rows[i:i + batch_size]
            batch_insert = f"INSERT INTO `{table_name}` ({columns}) VALUES\n"
            batch_insert += ",\n".join([f"({values})" for values in batch_values])
            batch_insert += ";"

            if table_name not in batch_inserts:
                batch_inserts[table_name] = []
            batch_inserts[table_name].append(batch_insert)

    return batch_inserts


def execute_batch_inserts(db_config, batch_inserts):
    """直接执行批量INSERT到数据库"""
    connection = pymysql.connect(**db_config)
    try:
        with connection.cursor() as cursor:
            for table_name, inserts in batch_inserts.items():
                for index, insert_sql in enumerate(inserts):
                    cursor.execute(insert_sql)
                    print(f"表 {table_name},共 {len(inserts)} 个, 第 {index + 1} 个批量INSERT语句执行成功")
        connection.commit()
    finally:
        connection.close()


# 数据库配置
db_config = {
    'host': '192.168.50.235',
    'user': 'root',
    'password': 'admin123456',
    'db': 'wtlivedb_1',
    'charset': 'utf8mb4'
}

"""
移除INSERT 语句 其他的就是建表语句了
cat file |grep -v 'INSERT ' > create_talbe.sql
下面是 INSERT 转化为  BATCH INSERT 的脚本
"""

if __name__ == "__main__":
    input_file = "wtlivedb.sql"

    # 使用
    batch_inserts = process_large_sql_file("input.sql")
    execute_batch_inserts(db_config, batch_inserts)

    # 打印统计信息
    for table_name, inserts in batch_inserts.items():
        print(f"表 '{table_name}': {len(inserts)} 个批量INSERT语句")