import aiosqlite
import os

DB_PATH = os.path.join(os.path.dirname(__file__), "..", "data", "bank_v2.db")

SCHEMA = """
CREATE TABLE IF NOT EXISTS banks (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    guild_id INTEGER NOT NULL,
    name TEXT NOT NULL,
    role_id INTEGER NOT NULL,
    establishment_code INTEGER NOT NULL,
    vault_balance REAL DEFAULT 0.0,
    clients_total_balance REAL DEFAULT 0.0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(guild_id, name),
    UNIQUE(guild_id, establishment_code)
);

CREATE TABLE IF NOT EXISTS accounts (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    guild_id INTEGER NOT NULL,
    bank_id INTEGER NOT NULL,
    user_id INTEGER NOT NULL,
    rib TEXT NOT NULL UNIQUE,
    account_type TEXT NOT NULL CHECK(account_type IN ('particulier', 'entreprise')),
    solde REAL DEFAULT 0.0,
    tva_rate REAL DEFAULT 0.0,
    password TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (bank_id) REFERENCES banks(id) ON DELETE CASCADE,
    UNIQUE(guild_id, bank_id, user_id, account_type)
);

CREATE TABLE IF NOT EXISTS institutions (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    guild_id INTEGER NOT NULL,
    name TEXT NOT NULL,
    role_id INTEGER,
    can_audit_all INTEGER DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(guild_id, name)
);

CREATE TABLE IF NOT EXISTS fisc_config (
    guild_id INTEGER PRIMARY KEY,
    institution_id INTEGER,
    FOREIGN KEY (institution_id) REFERENCES institutions(id) ON DELETE SET NULL
);

CREATE TABLE IF NOT EXISTS transactions (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    guild_id INTEGER NOT NULL,
    emetteur_rib TEXT,
    destinataire_rib TEXT,
    emetteur_id INTEGER,
    destinataire_id INTEGER,
    montant REAL NOT NULL,
    type TEXT NOT NULL,
    date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    metadata TEXT
);

CREATE INDEX IF NOT EXISTS idx_accounts_guild_user ON accounts(guild_id, user_id);
CREATE INDEX IF NOT EXISTS idx_accounts_rib ON accounts(rib);
CREATE INDEX IF NOT EXISTS idx_accounts_bank ON accounts(guild_id, bank_id);
CREATE INDEX IF NOT EXISTS idx_transactions_guild ON transactions(guild_id);
CREATE INDEX IF NOT EXISTS idx_transactions_ribs ON transactions(emetteur_rib, destinataire_rib);
CREATE INDEX IF NOT EXISTS idx_banks_guild ON banks(guild_id);
CREATE INDEX IF NOT EXISTS idx_institutions_guild ON institutions(guild_id);
"""


async def get_db() -> aiosqlite.Connection:
    os.makedirs(os.path.dirname(DB_PATH), exist_ok=True)
    db = await aiosqlite.connect(DB_PATH)
    db.row_factory = aiosqlite.Row
    await db.execute("PRAGMA journal_mode=WAL")
    await db.execute("PRAGMA foreign_keys=ON")
    await db.executescript(SCHEMA)
    await db.commit()
    return db