src/utils.py

from pathlib import Path

import pandas as pd
import os
import re
from scipy import stats

from src.constants import ProblemTypes, MetricNames

METRIC_CHOICES = [
    MetricNames.normalized_error,
    MetricNames.fit_time_per_1K_rows,
    MetricNames.inference_time_per_1K_rows,
]


# Define the formatting function
def format_number(num):
    # Check if the value is numeric
    if isinstance(num, (int, float)):
        if abs(num) >= 10**2:
            return f"{num:.1e}"
        else:
            return f"{num:.3f}"
    # Return non-numeric values as-is
    return num

def norm_sNavie(df):
    df_normalized = df.copy()
    seasonal_naive_row = df[df['model'] == 'seasonal_naive'].iloc[0]
    print('df: ',df)
    for column in df.columns:
        if column != 'model':  # We skip normalizing the 'model' column
            df_normalized[column] = df[column] / seasonal_naive_row[column]
    return df_normalized

def pivot_df(file_name, tab_name):
    df = pd.read_csv(file_name)
    if tab_name == 'univariate':
        df['univariate'] = df['univariate'].replace({True: 'univariate', False: 'multivariate'})
        df.rename(columns={'univariate': 'variate_type'}, inplace=True)
        tab_name = 'variate_type'
    df_melted = pd.melt(df, id_vars=[tab_name, 'model'], var_name='metric', value_name='value')
    df_melted['metric'] = df_melted['metric'].replace({
        'eval_metrics/MAPE[0.5]': 'MAPE',
        'eval_metrics/mean_weighted_sum_quantile_loss': 'CRPS'
    })
    df_pivot = df_melted.pivot_table(index='model', columns=[tab_name, 'metric'], values='value')
    df_pivot.columns = [f'{tab_name} ({metric})' for tab_name, metric in df_pivot.columns]
    # df_pivot.to_csv('pivoted_df.csv')
    # print(df_pivot)
    df_pivot = df_pivot.reset_index()
    df_pivot = df_pivot.round(3)
    return df_pivot


def rename_metrics(df):
    df = df.rename(columns={
        f'eval_metrics/{MetricNames.normalized_error}': MetricNames.normalized_error,
        f'eval_metrics/{MetricNames.inference_time_per_1K_rows}': "Inference time / 1K rows (s)",
        f'eval_metrics/{MetricNames.fit_time_per_1K_rows}': "Fit time / 1K rows (s)",
    })
    return df

def format_df(df):
    df = df.applymap(format_number)
    # make sure the data type is float
    df.iloc[:, 1:] = df.iloc[:, 1:].astype(float)
    return df

def unify_freq(df):
    # Remove all numeric characters from the 'frequency' column
    df['frequency'] = df['frequency'].str.replace(r'\d+', '', regex=True)
    # Remove everything after '-' if present
    df['frequency'] = df['frequency'].str.split('-').str[0]

    # Define the frequency conversion dictionary
    freq_conversion = {
        'T': 'Minutely',
        'H': 'Hourly',
        'D': 'Daily',
        'W': 'Weekly',
        'M': 'Monthly',
        'Q': 'Quarterly',
        'Y': 'Yearly',
        'A': 'Yearly',
        'S': 'Secondly'
    }

    # Map the cleaned 'frequency' values using the dictionary
    df['frequency'] = df['frequency'].replace(freq_conversion)
    return df
def pivot_existed_df(df, tab_name):
    df = df.reset_index()
    if tab_name == 'univariate':
        df['univariate'] = df['univariate'].replace({True: 'univariate', False: 'multivariate'})
        df.rename(columns={'univariate': 'variate_type'}, inplace=True)
        tab_name = 'variate_type'
    print('tab_name:', tab_name, 'df: ',df)
    print('columns', df.columns)
    df_melted = pd.melt(df, id_vars=[tab_name, 'model'], var_name='metric', value_name='value')
    df_melted['metric'] = df_melted['metric'].replace({
        'eval_metrics/normalized-error': 'normalized-error',
        'eval_metrics/mean_weighted_sum_quantile_loss': 'CRPS',
        'rank': 'Rank',
    })
    df_pivot = df_melted.pivot_table(index='model', columns=[tab_name, 'metric'], values='value')
    df_pivot.columns = [f'{tab_name} ({metric})' for tab_name, metric in df_pivot.columns]
    df_pivot = df_pivot.reset_index()
    # df_pivot = df_pivot.round(3)
    df_pivot = format_df(df_pivot)
    # df_pivot = df_pivot.applymap(format_number)
    # # make sure the data type is float
    # df_pivot.iloc[:, 1:] = df_pivot.iloc[:, 1:].astype(float)
    return df_pivot


def get_grouped_dfs(root_dir=None):
    if root_dir is None:
        root_dir = Path(__file__).parent.parent / "results"
    df_list = []

    # Walk through all folders and subfolders in the root directory
    for csv_path in Path(root_dir).rglob("*csv"):
        if 'all_results.csv' in str(csv_path):
            df_list.append(pd.read_csv(csv_path))

    # Concatenate all dataframes into one
    all_results_df = pd.concat(df_list, ignore_index=True)
    all_results_df = all_results_df.sort_values(by=['model', 'dataset']).reset_index(drop=True)
    ds_properties = root_dir / 'dataset_properties.csv'
    dataset_properties = pd.read_csv(ds_properties)

    # # Reforemat the first element of each row after the header following these rules:
    # # 1. make all characters lowercase
    # dataset_properties['dataset'] = dataset_properties['dataset'].apply(lambda x: x.lower())
    # # 2. replace all spaces with underscores
    # dataset_properties['dataset'] = dataset_properties['dataset'].apply(lambda x: x.replace(' ', '_'))
    # # 3. Replace all dashes with underscores
    # dataset_properties['dataset'] = dataset_properties['dataset'].apply(lambda x: x.replace('-', '_'))
    # # 4. Replace consecutive underscores with a single underscore. There maybe more than 2 consecutive underscores
    # dataset_properties['dataset'] = dataset_properties['dataset'].apply(lambda x: re.sub('_+', '_', x))
    # # 5. Remove all leading and trailing underscores
    # dataset_properties['dataset'] = dataset_properties['dataset'].apply(lambda x: x.strip('_'))

    df = all_results_df

    # convert it to a dictionary, with dataset as the key, and the value as another dictionary. The inner dictionary has the column names as the key, and the value as the value.
    dataset_properties_dict = dataset_properties.set_index('dataset').T.to_dict('dict')

    # match the dataset name in model_properties_dict with the dataset name in df and add a new column for each key value pair in the inner dictionary.
    for dataset in dataset_properties_dict.keys():
        for key in dataset_properties_dict[dataset].keys():
            df.loc[df['dataset'] == dataset, key] = dataset_properties_dict[dataset][key]

    # unify the frequency
    # df = unify_freq(df)
    # standardize by seasonal naive
    df = standardize_df(df)

    # TODO compute normalized error
    # TODO change to ELO
    RANKING_METRIC = "normalized-error"

    # compute metrics that requires all methods results such as Rank and Elo.
    df['rank'] = df.groupby(['dataset', ProblemTypes.col_name])[f'{RANKING_METRIC}'].rank(method='first', ascending=True)
    df['ELO'] = df.groupby(['dataset', ProblemTypes.col_name])[f'{RANKING_METRIC}'].rank(method='first',
                                                                                          ascending=True) * 100
    # group by domain
    grouped_results_overall = df.groupby(['model'])[METRIC_CHOICES].agg("mean")
    grouped_results_overall_rank = df.groupby(['model'])[['rank']].mean()
    grouped_results_overall_elo = df.groupby(['model'])[['ELO']].mean()
    grouped_results_overall = pd.concat([
        grouped_results_overall,
        grouped_results_overall_rank,
        grouped_results_overall_elo],
        axis=1
    )

    # grouped_results_overall = grouped_results_overall.rename(columns={'model':'Model'})
    # grouped_results.to_csv(f'artefacts/grouped_results_by_model.csv')
    grouped_dfs = {}
    # for col_name in ["domain", 'term_length', 'frequency', 'univariate']:
    for col_name in [ProblemTypes.col_name]:
        grouped_dfs[col_name] = group_by(df, col_name)
        # print(f"Grouping by {col_name}:\n {grouped_dfs.head(20)}")

    grouped_dfs['overall'] = grouped_results_overall
    return grouped_dfs


def standardize_df(df):
    raw_metric = MetricNames.raw_error
    # Perform min-max normalization. We may want to do something more outlier robust like what is done
    # in Tabrepo by doing (x - x.min()) / (x.median() - x.min())
    df[MetricNames.normalized_error] = df.groupby('dataset')[raw_metric].transform(
        lambda x: (x - x.min()) / (x.max() - x.min())
    )
    return df


def group_by(df, col_name):
    #grouped_results = df.groupby([col_name, 'model'])[METRIC_CHOICES].agg(stats.gmean)
    grouped_results = df.groupby([col_name, 'model'])[METRIC_CHOICES].mean()
    grouped_results_rank = df.groupby([col_name, 'model'])[['rank']].mean()
    grouped_results = pd.concat([grouped_results, grouped_results_rank], axis=1)
    # Display the results
    # Write the results to a csv file
    # grouped_results.to_csv(f'grouped_results_by_{col_name}.csv')
    return grouped_results