import pandas as pd
import numpy as np
import seaborn as sns
import matplotlib.pyplot as plt
from sklearn.preprocessing import LabelEncoder, StandardScaler
from sklearn.feature_selection import SelectKBest, f_classif
from sklearn.model_selection import train_test_split
from sklearn.cluster import KMeans, AgglomerativeClustering
from sklearn.pipeline import Pipeline
from sklearn.metrics import silhouette_score

# Load the data
file_path = 'customer_profile_marketing.csv'
df = pd.read_csv(file_path)

# Initial Analysis
print("Initial DataFrame Info:")
df.info()
print("\nInitial DataFrame Head:")
print(df.head())

# Drop irrelevant columns
df = df.drop(columns=['Unnamed: 0', 'ID', 'Dt_Customer', 'Z_CostContact', 'Z_Revenue'])

# Handle missing values (if any)
print("Missing Values: {}", df.isna().sum())
df = df.dropna()

# Feature Engineering
# Calculate age from 'Year_Birth'
df['Age'] = 2024 - df['Year_Birth']  # Assuming the current year is 2024
df = df.drop(columns=['Year_Birth'])

# Convert categorical variables to numerical format using Label Encoding
label_encoder = LabelEncoder()
df['Education'] = label_encoder.fit_transform(df['Education'])
df['Marital_Status'] = label_encoder.fit_transform(df['Marital_Status'])

df.to_csv("./data_pre_processed_v1")
# Correlation Analysis
corr_matrix = df.corr()
plt.figure(figsize=(16, 12))
sns.heatmap(corr_matrix, annot=True, fmt='.2f', cmap='coolwarm', square=True)
plt.title('Correlation Matrix')
plt.show()

# Feature Selection using SelectKBest
X = df.drop(columns=['Response'])  # Features
y = df['Response']  # Target variable

# Select the top 10 features
selector = SelectKBest(score_func=f_classif, k=10)
X_new = selector.fit_transform(X, y)

# Get the columns selected
selected_features = X.columns[selector.get_support()]
print("Selected Features:")
print(selected_features)

# Drop unimportant features
df_processed = df[selected_features]
df_processed['Response'] = y

# Normalize the relevant numerical features
scaler = StandardScaler()
numerical_cols = df_processed.select_dtypes(include=[np.number]).columns.tolist()
numerical_cols.remove('Response')  # Remove the target variable from the list

df_processed[numerical_cols] = scaler.fit_transform(df_processed[numerical_cols])

# Encoding categorical variables (already encoded with LabelEncoder)
# No additional encoding is necessary if the categorical columns have been encoded

# Train-Test Split
X_train, X_test, y_train, y_test = train_test_split(df_processed.drop(columns=['Response']),
                                                    df_processed['Response'],
                                                    test_size=0.3,
                                                    random_state=42)

# Clustering Algorithms
# 1. KMeans
kmeans = KMeans(n_clusters=2, random_state=42)
kmeans.fit(X_train)
kmeans_labels = kmeans.predict(X_test)
kmeans_silhouette = silhouette_score(X_test, kmeans_labels)
print(f"KMeans Silhouette Score: {kmeans_silhouette:.2f}")

# 2. Agglomerative Clustering
agg_clustering = AgglomerativeClustering(n_clusters=2)
agg_labels = agg_clustering.fit_predict(X_test)
agg_silhouette = silhouette_score(X_test, agg_labels)
print(f"Agglomerative Clustering Silhouette Score: {agg_silhouette:.2f}")

# Summary of Results
print("\nSummary of Clustering Results:")
print(f"KMeans Silhouette Score: {kmeans_silhouette:.2f}")
print(f"Agglomerative Clustering Silhouette Score: {agg_silhouette:.2f}")

# Optional: If you want to use a pipeline for scaling and clustering together
# pipeline = Pipeline([('scaler', StandardScaler()), ('kmeans', KMeans(n_clusters=2, random_state=42))])
# pipeline.fit(X_train)
# pipeline_labels = pipeline.predict(X_test)
# pipeline_silhouette = silhouette_score(X_test, pipeline_labels)
# print(f"Pipeline KMeans Silhouette Score: {pipeline_silhouette:.2f}")