# -*- coding: utf-8 -*-
# @Time : 2025/7/4 18:48
# @Author : Lukax
# @Email : Lukarxiang@gmail.com
# @File : Settings.py
# -*- presentd: PyCharm -*-


import os
import torch
from xgboost import XGBRegressor
from lightgbm import LGBMRegressor
from catboost import CatBoostRegressor
from sklearn.ensemble import RandomForestRegressor



class Config:
    ROOT_PATH = os.getcwd()
    DATA_DIR = os.path.join(ROOT_PATH, 'data')
    SUBMISSION_DIR = os.path.join(ROOT_PATH, 'submission')
    RESULTS_DIR = os.path.join(ROOT_PATH, 'results')

    os.makedirs(DATA_DIR, exist_ok=True)
    os.makedirs(SUBMISSION_DIR, exist_ok=True)
    os.makedirs(RESULTS_DIR, exist_ok=True)
    TRAIN_PATH = os.path.join(DATA_DIR, 'train.parquet')
    TEST_PATH = os.path.join(DATA_DIR, 'test.parquet')
    SUBMISSION_PATH = os.path.join(DATA_DIR, 'sample_submission.csv')

    FEATURES = [
        "bid_qty", "ask_qty", "buy_qty", "sell_qty", "volume",
        "X598", "X385", "X603", "X674", "X415", "X345", "X174", 
        "X302", "X178", "X168", "X612", "X421", "X333", "X586", "X292"
    ]

    MLP_FEATURES = [
        "bid_qty", "ask_qty", "buy_qty", "sell_qty", "volume",
        "X344", "X598", "X385", "X603", "X674", "X415", "X345", "X137", 
        "X174", "X302", "X178", "X532", "X168", "X612"
    ]

    TARGET = 'label'
    N_FOLDS = 5
    RANDOM_STATE = 23
    OUTLIER_FRACTION = 0.001
    OUTLIER_STRATEGIES = ['reduce', 'remove', 'double', 'none']
    

    ENSEMBLE_METHODS = ['grid', 'stacking'] 
    GRID_SEARCH_STRIDE1 = 0.1 
    GRID_SEARCH_STRIDE2 = 0.025 
    
    SLICE_CONFIGS = [
        {'name': 'full', 'anchor_ratio': 0, 'after': True, 'adjust_outlier': False},
        {'name': 'recent_90', 'anchor_ratio': 0.1, 'after': True, 'adjust_outlier': False},
        {'name': 'recent_85', 'anchor_ratio': 0.15, 'after': True, 'adjust_outlier': False},
        {'name': 'recent_80', 'anchor_ratio': 0.2, 'after': True, 'adjust_outlier': False},
        {'name': 'first_25', 'anchor_ratio': 0.25, 'after': False, 'adjust_outlier': False},
    ]
    
    SLICE_WEIGHTS = [
        1.0,   # full_data
        1.0,   # last_90pct
        1.0,   # last_85pct
        1.0,   # last_80pct
        0.25,  # oldest_25pct
        0.9,   # full_data_outlier_adj
        0.9,   # last_90pct_outlier_adj
        0.9,   # last_85pct_outlier_adj
        0.9,   # last_80pct_outlier_adj
        0.2    # oldest_25pct_outlier_adj
    ]
    

    MLP_CONFIG = {
        'layers': [len(MLP_FEATURES), 128, 64, 1],
        'activation': 'relu',
        'last_activation': None,
        'dropout_rate': 0.6,
        'learning_rate': 0.001,
        'batch_size': 1024,
        'epochs': 100,
        'patience': 10
    }


    @classmethod
    def get_learners(cls):
        return [
            {
                'name': 'xgb', 
                'estimator': XGBRegressor,
                'params': {
                    "tree_method": "hist",
                    "device": "gpu" if torch.cuda.is_available() else "cpu",
                    "colsample_bylevel": 0.4778,
                    "colsample_bynode": 0.3628,
                    "colsample_bytree": 0.7107,
                    "gamma": 1.7095,
                    "learning_rate": 0.02213,
                    "max_depth": 20,
                    "max_leaves": 12,
                    "min_child_weight": 16,
                    "n_estimators": 1667,
                    "subsample": 0.06567,
                    "reg_alpha": 39.3524,
                    "reg_lambda": 75.4484,
                    "verbosity": 0,
                    "random_state": cls.RANDOM_STATE,
                    "n_jobs": -1
                },
            },
            {
                'name': 'lgb', 
                'estimator': LGBMRegressor,
                'params': {
                    "objective": "regression",
                    "metric": "rmse",
                    "boosting_type": "gbdt",
                    "num_leaves": 31,
                    "learning_rate": 0.05,
                    "feature_fraction": 0.9,
                    "bagging_fraction": 0.8,
                    "bagging_freq": 5,
                    "verbose": -1,
                    "random_state": cls.RANDOM_STATE,
                    "n_estimators": 1000
                },
            },
            {
                'name': 'cat', 
                'estimator': CatBoostRegressor,
                'params': {
                    "iterations": 1000,
                    "learning_rate": 0.03,
                    "depth": 6,
                    "l2_leaf_reg": 3,
                    "random_seed": cls.RANDOM_STATE,
                    "verbose": False,
                    "allow_writing_files": False
                },
            },
            {
                'name': 'rf', 
                'estimator': RandomForestRegressor,
                'params': {
                    "n_estimators": 200,
                    "max_depth": 15,
                    "min_samples_split": 5,
                    "min_samples_leaf": 2,
                    "random_state": cls.RANDOM_STATE,
                    "n_jobs": -1
                },
            },
        ]
    
    @property 
    def LEARNERS(self):
        return self.get_learners()

    @classmethod
    def print_config_summary(cls):
        print("=" * 50)
        print(f"GBDT feature nums: {len(cls.FEATURES)}")
        print(f"MLP feature nums: {len(cls.MLP_FEATURES)}")
        print(f"n_cv: {cls.N_FOLDS}")
        print(f"outlier_fraction: {cls.OUTLIER_FRACTION}")
        print(f"outlier_strategies: {cls.OUTLIER_STRATEGIES}")
        print(f"learners: {[l['name'] for l in cls.get_learners()]}")
        print("=" * 50)



Config = Config()