from snek.system.service import BaseService 
import sqlite3 

class StatisticsService(BaseService):
    
    def database(self):
        db_path = self.app.db_path.split("///")[-1]
        print(db_path)
        conn = sqlite3.connect(db_path)
        cursor = conn.cursor()

        # Existing analysis code...
        def get_table_columns(table_name):
            cursor.execute(f"PRAGMA table_info({table_name})")
            return cursor.fetchall()

        tables = [
            'http_access', 'user', 'channel', 'channel_member', 'broadcast',
            'channel_message', 'notification', 'repository', 'test', 'drive',
            'user_property', 'a', 'channel_attachment', 'push_registration'
        ]

        for table in tables:
            print(f"\n--- Statistics for table: {table} ---")
            columns = get_table_columns(table)
            cursor.execute(f"SELECT COUNT(*) FROM {table}")
            total_rows = cursor.fetchone()[0]
            print(f"Total rows: {total_rows}")

            for col in columns:
                cid, name, col_type, notnull, dflt_value, pk = col
                col_type_upper = col_type.upper()

                cursor.execute(f"SELECT COUNT(DISTINCT '{name}') FROM {table}")
                distinct_count = cursor.fetchone()[0]
                print(f"\nColumn: {name} ({col_type})")
                print(f"Distinct values: {distinct_count}")

                if 'INT' in col_type_upper or 'BIGINT' in col_type_upper or 'FLOAT' in col_type_upper:
                    cursor.execute(f"SELECT MIN('{name}'), MAX('{name}'), AVG('{name}') FROM {table} WHERE '{name}' IS NOT NULL")
                    min_val, max_val, avg_val = cursor.fetchone()
                    print(f"Min: {min_val}, Max: {max_val}, Avg: {avg_val}")

                elif 'TEXT' in col_type_upper and ('date' in name.lower() or 'time' in name.lower() or 'created' in name.lower() or 'updated' in name.lower() or 'on' in name.lower()):
                    cursor.execute(f"SELECT MIN({name}), MAX({name}) FROM {table} WHERE {name} IS NOT NULL")
                    min_date, max_date = cursor.fetchone()
                    print(f"Earliest: {min_date}, Latest: {max_date}")

                elif 'TEXT' in col_type_upper:
                    cursor.execute(f"SELECT LENGTH({name}) FROM {table} WHERE {name} IS NOT NULL")
                    lengths = [len_row[0] for len_row in cursor.fetchall()]
                    if lengths:
                        avg_length = sum(lengths) / len(lengths)
                        max_length = max(lengths)
                        min_length = min(lengths)
                        print(f"Avg length: {avg_length:.2f}, Max length: {max_length}, Min length: {min_length}")
                    else:
                        print("No data to compute length statistics.")

        # New statistics functions
        def get_time_series_stats(table_name, date_column):
            cursor.execute(f"SELECT strftime('%Y-%m-%d', {date_column}) AS day, COUNT(*) FROM {table_name} GROUP BY day")
            return cursor.fetchall()

        def get_count_created(table_name, date_column):
            cursor.execute(f"SELECT COUNT(*) FROM {table_name}")
            return cursor.fetchone()[0]

        def get_channels_per_user():
            cursor.execute("SELECT user_uid, COUNT(*) AS channel_count FROM channel_member GROUP BY user_uid ORDER BY channel_count DESC")
            return cursor.fetchall()

        def get_online_users():
            cursor.execute("SELECT COUNT(*) FROM user WHERE last_ping >= datetime('now', '-5 minutes')")
            return cursor.fetchone()[0]

        # Example usage of new functions
        messages_per_day = get_time_series_stats('channel_message', 'created_at')
        users_created = get_count_created('user', 'created_at')
        channels_created = get_count_created('channel', 'created_at')
        channels_per_user = get_channels_per_user()
        online_users = get_online_users()

        # Print or store these stats as needed
        print("\nMessages per day:", messages_per_day)
        print("Total users created:", users_created)
        print("Total channels created:", channels_created)
        print("Channels per user (top):", channels_per_user[:10])
        print("Currently online users:", online_users)

        conn.close()
