#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2024 StrayWarrior <i@straywarrior.com>


import sys
import os
sys.path.append(os.path.join(os.path.dirname(__file__), 'src'))

import time
import json
from datetime import datetime, timedelta
import pandas as pd
from argparse import ArgumentParser
from long_articles.category_models import CategoryRegressionV1
from long_articles.consts import reverse_category_name_map
from common.database import MySQLManager
from common import db_operation
from common.logging import LOG
from config.dev import Config


def prepare_raw_data(dt_begin, dt_end):
    data_fields = ['dt', 'gh_id', 'account_name', 'title', 'similarity',
                   'view_count_rate', 'category', 'read_avg',
                   'read_avg_rate']
    fields_str = ','.join(data_fields)
    db_manager = MySQLManager(Config().MYSQL_LONG_ARTICLES)
    sql = f"""
        SELECT {fields_str} FROM datastat_score WHERE dt BETWEEN {dt_begin} AND {dt_end}
            AND similarity > 0 AND category IS NOT NULL AND read_avg > 500
            AND read_avg_rate BETWEEN 0 AND 3
            AND `index` = 1
        """
    rows = db_manager.select(sql)
    df = pd.DataFrame(rows, columns=data_fields)
    df = df.drop_duplicates(['dt', 'gh_id', 'title'])
    return df


def clear_old_version(db_manager, dt):
    update_timestamp = int(time.time())
    sql = f"""
        UPDATE account_category
        SET status = 0, update_timestamp = {update_timestamp}
        WHERE dt < {dt} and status = 1
    """
    rows = db_manager.execute(sql)
    print(f"updated rows: {rows}")

def get_last_version(db_manager, dt):
    sql = f"""
        SELECT gh_id, category_map
        FROM account_category
        WHERE dt = (SELECT max(dt) FROM account_category WHERE dt < {dt})
    """
    data = db_manager.select(sql)
    return data

def compare_version(db_manager, dt_version, new_version, account_id_map):
    last_version = get_last_version(db_manager, dt_version)
    last_version = { entry[0]: json.loads(entry[1]) for entry in last_version }
    new_version = { entry['gh_id']: json.loads(entry['category_map']) for entry in new_version }
    # new record
    all_gh_ids = set(list(new_version.keys()) + list(last_version.keys()))
    for gh_id in all_gh_ids:
        account_name = account_id_map[gh_id]
        if gh_id not in last_version:
            print(f"new account {account_name}: {new_version[gh_id]}")
        elif gh_id not in new_version:
            print(f"old account {account_name}: {last_version[gh_id]}")
        else:
            new_cates = new_version[gh_id]
            old_cates = last_version[gh_id]
            for cate in new_cates:
                if cate not in old_cates:
                    print(f"account {account_name} new cate: {cate} {new_cates[cate]}")
            for cate in old_cates:
                if cate not in new_cates:
                    print(f"account {account_name} old cate: {cate} {old_cates[cate]}")


def main():
    parser = ArgumentParser()
    parser.add_argument('-n', '--dry-run', action='store_true', help='do not update database')
    parser.add_argument('--run-at', help='dt, also for version')
    args = parser.parse_args()

    run_date = datetime.today()
    if args.run_at:
        run_date = datetime.strptime(args.run_at, "%Y%m%d")
    begin_dt = 20240914
    end_dt = (run_date - timedelta(1)).strftime("%Y%m%d")
    dt_version = end_dt
    LOG.info(f"data range: {begin_dt} - {end_dt}")

    raw_df = prepare_raw_data(begin_dt, end_dt)

    cate_model = CategoryRegressionV1()
    df = cate_model.preprocess_data(raw_df)

    if args.dry_run and False:
        cate_model.build(df)
        return

    create_timestamp = int(time.time())
    update_timestamp = create_timestamp

    records_to_save = []

    param_to_category_map = reverse_category_name_map
    account_ids = df['gh_id'].unique()
    account_id_map = df[['account_name', 'gh_id']].drop_duplicates() \
        .set_index('gh_id')['account_name'].to_dict()

    account_negative_cates = {k: [] for k in account_ids}
    for account_id in account_ids:
        sub_df = df[df['gh_id'] == account_id]
        account_name = account_id_map[account_id]
        sample_count = len(sub_df)
        if sample_count < 5:
            continue
        print_error = False
        params, t_stats, p_values = cate_model.run_ols_linear_regression(sub_df, print_error)
        current_record = {}
        current_record['dt'] = dt_version
        current_record['gh_id'] = account_id
        current_record['category_map'] = {}
        param_names = cate_model.get_param_names()
        for name, param, p_value in zip(param_names, params, p_values):
            cate_name = param_to_category_map.get(name, None)
            # 用于排序的品类相关性
            if abs(param) > 0.1 and p_value < 0.1 and cate_name is not None:
                print(f"{account_id} {account_name} {cate_name} {param:.3f} {p_value:.3f}")
                truncate_param = round(max(min(param, 0.25), -0.3), 6)
                current_record['category_map'][cate_name] = truncate_param
            # 用于冷启文章分配的负向品类
            if param < -0.1 and cate_name is not None and p_value < 0.3:
                account_negative_cates[account_id].append(cate_name)
                # print((account_name, cate_name, param, p_value))
        if not current_record['category_map']:
            continue
        current_record['category_map'] = json.dumps(current_record['category_map'], ensure_ascii=False)
        current_record['status'] = 1
        current_record['create_timestamp'] = create_timestamp
        current_record['update_timestamp'] = update_timestamp
        records_to_save.append(current_record)

    db_manager = MySQLManager(Config().MYSQL_LONG_ARTICLES)
    if args.dry_run:
        compare_version(db_manager, dt_version, records_to_save, account_id_map)
        return

    db_manager.batch_insert('account_category', records_to_save)
    clear_old_version(db_manager, dt_version)

    # 过滤空账号
    for account_id in [*account_negative_cates.keys()]:
        if not account_negative_cates[account_id]:
            account_negative_cates.pop(account_id)

    # print(json.dumps(account_negative_cates, ensure_ascii=False, indent=2))

if __name__ == '__main__':
    main()