# rstat_tool/database.py

import sqlite3
import time
# --- IMPORT ADDED BACK IN ---
from .ticker_extractor import COMMON_WORDS_BLACKLIST

DB_FILE = "reddit_stocks.db"

def get_db_connection():
    """Establishes a connection to the SQLite database."""
    conn = sqlite3.connect(DB_FILE)
    conn.row_factory = sqlite3.Row
    return conn

def initialize_db():
    # ... (This function is unchanged)
    conn = get_db_connection()
    cursor = conn.cursor()
    cursor.execute("""
        CREATE TABLE IF NOT EXISTS tickers (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            symbol TEXT NOT NULL UNIQUE,
            market_cap INTEGER,
            last_updated INTEGER
        )
    """)
    cursor.execute("""
        CREATE TABLE IF NOT EXISTS subreddits (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            name TEXT NOT NULL UNIQUE
        )
    """)
    cursor.execute("""
        CREATE TABLE IF NOT EXISTS mentions (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            ticker_id INTEGER,
            subreddit_id INTEGER,
            post_id TEXT NOT NULL,
            mention_timestamp INTEGER NOT NULL,
            sentiment_score REAL,
            FOREIGN KEY (ticker_id) REFERENCES tickers (id),
            FOREIGN KEY (subreddit_id) REFERENCES subreddits (id),
            UNIQUE(ticker_id, post_id, sentiment_score)
        )
    """)
    conn.commit()
    conn.close()
    print("Database initialized successfully.")

# --- CLEANUP FUNCTION ADDED BACK IN ---
def clean_stale_tickers():
    """
    Removes tickers and their associated mentions from the database
    if the ticker symbol exists in the COMMON_WORDS_BLACKLIST.
    """
    print("\n--- Cleaning Stale Tickers from Database ---")
    conn = get_db_connection()
    cursor = conn.cursor()

    # Find ticker IDs that match the blacklist
    placeholders = ','.join('?' for _ in COMMON_WORDS_BLACKLIST)
    query = f"SELECT id, symbol FROM tickers WHERE symbol IN ({placeholders})"
    
    cursor.execute(query, tuple(COMMON_WORDS_BLACKLIST))
    stale_tickers = cursor.fetchall()

    if not stale_tickers:
        print("No stale tickers to clean.")
        conn.close()
        return

    for ticker in stale_tickers:
        ticker_id = ticker['id']
        ticker_symbol = ticker['symbol']
        print(f"Removing stale ticker '{ticker_symbol}' (ID: {ticker_id})...")
        
        # 1. Delete all mentions associated with this ticker ID
        cursor.execute("DELETE FROM mentions WHERE ticker_id = ?", (ticker_id,))
        
        # 2. Delete the ticker itself
        cursor.execute("DELETE FROM tickers WHERE id = ?", (ticker_id,))
    
    deleted_count = conn.total_changes
    conn.commit()
    conn.close()
    print(f"Cleanup complete. Removed {deleted_count} records.")


def add_mention(conn, ticker_id, subreddit_id, post_id, timestamp, sentiment):
    # ... (This function is unchanged)
    cursor = conn.cursor()
    try:
        cursor.execute(
            "INSERT INTO mentions (ticker_id, subreddit_id, post_id, mention_timestamp, sentiment_score) VALUES (?, ?, ?, ?, ?)",
            (ticker_id, subreddit_id, post_id, timestamp, sentiment)
        )
        conn.commit()
    except sqlite3.IntegrityError:
        pass

# ... (get_or_create_entity, update_ticker_market_cap, get_ticker_info are unchanged)
def get_or_create_entity(conn, table_name, column_name, value):
    # ...
    cursor = conn.cursor()
    cursor.execute(f"SELECT id FROM {table_name} WHERE {column_name} = ?", (value,))
    result = cursor.fetchone()
    if result: return result['id']
    else:
        cursor.execute(f"INSERT INTO {table_name} ({column_name}) VALUES (?)", (value,))
        conn.commit()
        return cursor.lastrowid

def update_ticker_market_cap(conn, ticker_id, market_cap):
    # ...
    cursor = conn.cursor()
    current_timestamp = int(time.time())
    cursor.execute("UPDATE tickers SET market_cap = ?, last_updated = ? WHERE id = ?", (market_cap, current_timestamp, ticker_id))
    conn.commit()

def get_ticker_info(conn, ticker_id):
    # ...
    cursor = conn.cursor()
    cursor.execute("SELECT * FROM tickers WHERE id = ?", (ticker_id,))
    return cursor.fetchone()

def generate_summary_report(limit=20):
    # ... (This function is unchanged)
    print(f"\n--- Top {limit} Tickers by Mention Count ---")
    conn = get_db_connection()
    cursor = conn.cursor()
    query = """
        SELECT
            t.symbol,
            t.market_cap,
            COUNT(m.id) as mention_count,
            SUM(CASE WHEN m.sentiment_score > 0.1 THEN 1 ELSE 0 END) as bullish_mentions,
            SUM(CASE WHEN m.sentiment_score < -0.1 THEN 1 ELSE 0 END) as bearish_mentions,
            SUM(CASE WHEN m.sentiment_score BETWEEN -0.1 AND 0.1 THEN 1 ELSE 0 END) as neutral_mentions
        FROM mentions m
        JOIN tickers t ON m.ticker_id = t.id
        GROUP BY t.symbol, t.market_cap
        ORDER BY mention_count DESC
        LIMIT ?;
    """
    results = cursor.execute(query, (limit,)).fetchall()
    header = f"{'Ticker':<8} | {'Mentions':<8} | {'Bullish':<8} | {'Bearish':<8} | {'Neutral':<8} | {'Market Cap':<15}"
    print(header)
    print("-" * len(header))
    for row in results:
        market_cap_str = "N/A"
        if row['market_cap'] and row['market_cap'] > 0:
            mc = row['market_cap']
            if mc >= 1e12: market_cap_str = f"${mc/1e12:.2f}T"
            elif mc >= 1e9: market_cap_str = f"${mc/1e9:.2f}B"
            else: market_cap_str = f"${mc/1e6:.2f}M"
        print(f"{row['symbol']:<8} | {row['mention_count']:<8} | {row['bullish_mentions']:<8} | {row['bearish_mentions']:<8} | {row['neutral_mentions']:<8} | {market_cap_str:<15}")
    conn.close()