import os
import pandas as pd
import requests, json
from io import StringIO
from datetime import datetime


def get_github_data():
    """
    Get data from csv files on Github
    Args:
        None
    Returns:
        latest_df: singular list containing dataframe of the latest version of the leaderboard with only 4 columns
        all_dfs: list of dataframes for previous versions + latest version including columns for all games
        all_vnames: list of the names for the previous versions + latest version (For Details and Versions Tab Dropdown)
    """
    uname = "clembench"
    repo = "clembench-runs"
    json_url = f"https://raw.githubusercontent.com/{uname}/{repo}/main/benchmark_runs.json"
    resp = requests.get(json_url)
    if resp.status_code == 200:
        json_data = json.loads(resp.text)
        versions = json_data['versions']
        version_names = []
        csv_url = f"https://raw.githubusercontent.com/{uname}/{repo}/main/"
        for ver in versions:
            version_names.append(ver['version'])
            csv_path = ver['result_file'].split('/')[1:]
            csv_path = '/'.join(csv_path)
        
        # Sort by latest version
        float_content = [float(s[1:]) for s in version_names]
        float_content.sort(reverse=True)
        version_names = ['v'+str(s) for s in float_content]

        # Get date of latest version
        for data in versions:
            if data['version'] == version_names[0]:
                date = data['date'] # Should be in YYYY/MM/DD format
                date_obj = datetime.strptime(date, "%Y/%m/%d")
                date = date_obj.strftime("%d %b %Y")

        DFS = []
        for version in version_names:
            result_url = csv_url+ version + '/' + csv_path
            csv_response = requests.get(result_url)
            if csv_response.status_code == 200:
                df = pd.read_csv(StringIO(csv_response.text))
                df = process_df(df)
                df = df.sort_values(by=list(df.columns)[1], ascending=False) # Sort by clemscore
                DFS.append(df)
            else:
                print(f"Failed to read CSV file for version : {version}. Status Code : {resp.status_code}")

        # Only keep relevant columns for the main leaderboard
        latest_df_dummy = DFS[0]
        all_columns = list(latest_df_dummy.columns)
        keep_columns = all_columns[0:4]
        latest_df_dummy = latest_df_dummy.drop(columns=[c for c in all_columns if c not in keep_columns])

        latest_df = [latest_df_dummy]
        all_dfs = []
        all_vnames = []
        for df, name in zip(DFS, version_names):
            all_dfs.append(df)
            all_vnames.append(name) 
        return latest_df, all_dfs, all_vnames, date
    
    else:
        print(f"Failed to read JSON file: Status Code : {resp.status_code}")


def process_df(df: pd.DataFrame) -> pd.DataFrame:
    """
    Process dataframe
    - Remove repition in model names
    - Convert datatypes to sort by "float" instead of "str" for sorting
    - Update column names
    Args:
        df: Unprocessed Dataframe (after using update_cols)
    Returns:
        df: Processed Dataframe
    """

    # Change column type to float from str
    list_column_names = list(df.columns)
    model_col_name = list_column_names[0]
    for col in list_column_names:
        if col != model_col_name:
            df[col] = df[col].astype(float)

    # Remove repetition in model names, if any
    models_list = []
    for i in range(len(df)):
        model_name = df.iloc[i][model_col_name]
        splits = model_name.split('--')
        splits = [split.replace('-t0.0', '') for split in splits] # Comment to not remove -t0.0
        if splits[0] == splits[1]:
            models_list.append(splits[0])
        else:
            models_list.append(splits[0] + "--" + splits[1])
    df[model_col_name] = models_list

    # Update column names
    update = ['Model', 'Clemscore', '% Played', 'Quality Score']
    game_metrics = list_column_names[4:]

    for col in game_metrics:
        splits = col.split(',')
        update.append(splits[0].capitalize() + "" + splits[1])
    
    map_cols = {}
    for i in range(len(update)):
        map_cols[list_column_names[i]] = str(update[i])

    df = df.rename(columns=map_cols)    
    return df


def filter_search(df: pd.DataFrame, query: str) -> pd.DataFrame:
    """
    Filter the dataframe based on the search query
    Args:
        df: Unfiltered dataframe
        query: a string of queries separated by ";"
    Return:
        filtered_df: Dataframe containing searched queries in the 'Model' column
    """
    queries = query.split(';')
    list_cols = list(df.columns)
    df_len = len(df)
    filtered_models = []
    models_list = list(df[list_cols[0]])
    for q in queries:
        q = q.lower()
        q = q.strip()
        for i in range(df_len):
            model_name = models_list[i]
            if q in model_name.lower():
                filtered_models.append(model_name) # Append model names containing query q

    filtered_df = df[df[list_cols[0]].isin(filtered_models)]

    if query == "":
        return df

    return filtered_df