import csv
import re
import mysql.connector
from datetime import datetime

# 文件路径
INPUT_FILE = 'elonmusk.csv'
OUTPUT_FILE = 'fixed.csv'

# 数据库连接配置
DB_CONFIG = {
    'host': '8.155.23.172',
    'port': 3306,
    'user': 'root2',
    'password': 'tG0f6PVYh18le41BCb',
    'database': 'elonX'
}
TABLE_NAME = 'elon_tweets'

# 第一步：修复 CSV 文件并添加 rank_id
def fix_line(lines, line_number, rank_id):
    full_line = ''.join(lines)
    match = re.search(r'^([^,]+),"(.+?)","([A-Z][a-z]{2} \d{1,2}, \d{1,2}:\d{2}:\d{2} (AM|PM) E[SD]T)"$', full_line,
                      re.DOTALL)
    if match:
        id_part = match.group(1)
        text_content = match.group(2)
        created_at = match.group(3)
        fixed_text = text_content.replace('"', '""')
        fixed_line = f'{rank_id},{id_part},"{fixed_text}","{created_at}"'
        return fixed_line
    else:
        print(f"Line {line_number} format error: {repr(full_line)}")
        return f'{rank_id},{full_line}'

def process_file(input_file, output_file):
    with open(input_file, 'r', encoding='utf-8') as f_in, open(output_file, 'w', encoding='utf-8') as f_out:
        f_out.write("rank_id,id,text,created_at\n")
        buffer = []
        line_number = 0
        rank_id = 1
        for line in f_in:
            line = line.rstrip('\n')
            if line.startswith('id,text,created_at'):
                continue
            line_number += 1
            buffer.append(line)
            if line.endswith('"') and re.search(r'"[A-Z][a-z]{2} \d{1,2}, \d{1,2}:\d{2}:\d{2} (AM|PM) E[SD]T"$', line):
                fixed_line = fix_line(buffer, line_number, rank_id)
                f_out.write(fixed_line + '\n')
                buffer = []
                rank_id += 1
        if buffer:
            fixed_line = fix_line(buffer, line_number, rank_id)
            f_out.write(fixed_line + '\n')
    print(f"CSV 文件已修复并添加 rank_id，保存为 {output_file}")

# 第二步：数据库操作
def get_max_rank_id(cursor):
    try:
        cursor.execute(f"SELECT MAX(rank_id) FROM {TABLE_NAME}")
        result = cursor.fetchone()[0]
        return result if result is not None else 0
    except mysql.connector.Error as e:
        print(f"获取最大 rank_id 出错: {e}")
        return 0

def import_to_database(input_file):
    try:
        conn = mysql.connector.connect(**DB_CONFIG)
        cursor = conn.cursor()
        print("成功连接到数据库")

        # 获取当前年份
        current_year = str(datetime.now().year)

        # 获取数据库中最大 rank_id
        max_rank_id = get_max_rank_id(cursor)
        print(f"数据库中最大 rank_id: {max_rank_id}")

        with open(input_file, 'r', encoding='utf-8') as f:
            reader = csv.reader(f)
            next(reader)  # 跳过表头
            total_rows = 0
            inserted = 0

            for row in reader:
                if len(row) != 4:
                    print(f"跳过无效行: {row}")
                    continue
                rank_id, id_, text, created_at = row
                rank_id = int(rank_id)
                tweet_id = float(id_)

                # 只导入 rank_id 大于 max_rank_id 的记录
                if rank_id <= max_rank_id:
                    continue

                total_rows += 1
                insert_query = f"""
                    INSERT INTO {TABLE_NAME} (rank_id, id, text, year, created_at, timestamp)
                    VALUES (%s, %s, %s, %s, %s, %s)
                """
                cursor.execute(insert_query, (rank_id, tweet_id, text, current_year, created_at, 0))
                inserted += 1
                print(f"文本: 【{text}】，这是第 {inserted} 行")

            conn.commit()
            print(f"数据库导入完成：总计处理 {total_rows} 行，插入 {inserted} 行")

            # 更新新插入记录的 timestamp，使用参数化查询
            update_query = f"""
                UPDATE {TABLE_NAME}
                SET timestamp = UNIX_TIMESTAMP(
                    CONVERT_TZ(
                        STR_TO_DATE(
                            CONCAT(year, ' ', SUBSTRING_INDEX(created_at, ' ', 4)),
                            '%Y %b %d, %l:%i:%s %p'
                        ),
                        CASE
                            WHEN RIGHT(created_at, 3) = 'EDT' THEN 'America/New_York'
                            WHEN RIGHT(created_at, 3) = 'EST' THEN 'America/New_York'
                            ELSE 'UTC'
                        END,
                        'UTC'
                    )
                )
                WHERE rank_id > {max_rank_id}
            """
            cursor.execute(update_query)
            conn.commit()
            print(f"已更新 rank_id > {max_rank_id} 的记录的时间戳")

    except mysql.connector.Error as e:
        print(f"数据库错误: {e}")
    except Exception as e:
        print(f"其他错误: {e}")
    finally:
        if 'cursor' in locals():
            cursor.close()
        if 'conn' in locals() and conn.is_connected():
            conn.close()
            print("数据库连接已关闭")

# 主流程
def main():
    process_file(INPUT_FILE, OUTPUT_FILE)
    import_to_database(OUTPUT_FILE)

if __name__ == "__main__":
    main()