import sqlite3
import os

DB_PATH = "data/warhammer_league.db"

def init_db():
    connection = sqlite3.connect(DB_PATH)
    cursor = connection.cursor()

    # Fremdschlüssel (Foreign Keys) in SQLite aktivieren
    cursor.execute('PRAGMA foreign_keys = ON;')

    # 1. Tabelle: players (Stammdaten) 
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS players (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            discord_id TEXT UNIQUE,
            discord_name TEXT NOT NULL,
            discord_avatar_url TEXT,
            display_name TEXT
        )
    ''')

    # 2. Tabelle: gamesystems (Globale Spielsysteme)
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS gamesystems (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            name TEXT NOT NULL,
            picture TEXT,
            description TEXT,
            min_score INTEGER DEFAULT 0,
            max_score INTEGER DEFAULT 100
        )
    ''')  

    # 3. Tabelle: player_game_statistic (Welcher Spieler hat in welchem System welche Stats?)
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS player_game_statistic (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            player_id INTEGER,
            gamesystem_id INTEGER,
            mmr INTEGER DEFAULT 1000,
            games_in_system INTEGER DEFAULT 0,
            points INTEGER DEFAULT 0,
            avv_points INTEGER DEFAULT 0,
            last_played TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            FOREIGN KEY (player_id) REFERENCES players (id),
            FOREIGN KEY (gamesystem_id) REFERENCES gamesystems (id)
        )
    ''')

    # 4. Tabelle: matches (Wer hat wann gegen wen in welchem System gespielt?)
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS matches (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            gamesystem_id INTEGER,
            player1_id INTEGER,
            score_player1 INTEGER,
            player2_id INTEGER,
            score_player2 INTEGER,
            played_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, 
            FOREIGN KEY (gamesystem_id) REFERENCES gamesystems (id),
            FOREIGN KEY (player1_id) REFERENCES players (id),
            FOREIGN KEY (player2_id) REFERENCES players (id)
        )
    ''')

    # 5. Tabelle: achievements (Der globale Katalog aller möglichen Erfolge - Stammdaten)
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS achievements (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            name TEXT NOT NULL,
            description TEXT NOT NULL,
            icon TEXT 
        )
    ''')

    # 6. Tabelle: player_achievements (Wer hat welchen Erfolg wann bekommen? - Bewegungsdaten)
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS player_achievements (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            player_id INTEGER,
            achievement_id INTEGER,
            earned_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
            earned_in INTEGER,
            FOREIGN KEY (earned_in) REFERENCES gamesystems (id),
            FOREIGN KEY (player_id) REFERENCES players (id),
            FOREIGN KEY (achievement_id) REFERENCES achievements (id)
        )
    ''')

    connection.commit()
    connection.close()
    print("Datenbank Struktur aufgebaut")

    #nächster Schritt: Standard Spielsysteme eintragen
    seed_gamesystems()


# --------------------
# --- Start Setup der DB Daten. Damit sie nicht GANZ leer sind.
# --------------------
def seed_gamesystems():
    connection = sqlite3.connect(DB_PATH)
    cursor = connection.cursor()
    systems = [
        ("Warhammer 40k","/gui/pictures/wsdg.png","Die Schlacht um die Galaxie in einer entfernten Zukunft." , 0, 100),
        ("Age of Sigmar","/gui/pictures/wsdg.png","" , 0, 50),
        ("Spearhead","/gui/pictures/wsdg.png","" , 0, 50)
    ]

    # executemany ist eine extrem schnelle SQL For-Schleife für Inserts
    cursor.executemany("INSERT INTO gamesystems (name, picture, description, min_score, max_score) VALUES (?, ?, ?, ?, ?)", systems)

    connection.commit()
    connection.close()
    print("Spielsysteme angelegt!")

    #Nächster Schritt: Standard Achievments eintragen.
    seed_achievements()

def seed_achievements():
    connection = sqlite3.connect(DB_PATH)
    cursor = connection.cursor()

    # Unsere Start-Stückliste an Erfolgen (Name, Beschreibung, Icon)
    achievements = [
        ("Kingslayer", "Hat den Spieler auf Platz 1 besiegt!", "👑"),
        ("Unstoppable", "3 Spiele in Folge gewonnen.", "🔥"),
        ("First Blood", "Das allererste Ligaspiel absolviert.", "🩸")
    ]

    cursor.executemany("INSERT INTO achievements (name, description, icon) VALUES (?, ?, ?)", achievements)

    connection.commit()
    connection.close()
    print("Achievements angelegt.")