-- Users table
CREATE TABLE IF NOT EXISTS users (
    id TEXT PRIMARY KEY NOT NULL,
    email TEXT UNIQUE NOT NULL,
    display_name TEXT NOT NULL,
    password_hash TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT (datetime('now'))
);

-- Rooms table with model_id for OpenRouter model selection
CREATE TABLE IF NOT EXISTS rooms (
    id TEXT PRIMARY KEY NOT NULL,
    name TEXT NOT NULL,
    model_id TEXT NOT NULL DEFAULT 'anthropic/claude-3.5-sonnet',
    created_by TEXT NOT NULL REFERENCES users(id),
    ai_always_respond INTEGER NOT NULL DEFAULT 0,
    system_prompt TEXT NOT NULL DEFAULT 'You are a helpful AI assistant participating in a group chat. Be conversational, helpful, and concise. You can see messages from all participants. When mentioned, respond helpfully.',
    created_at TEXT NOT NULL DEFAULT (datetime('now'))
);

-- Messages table
CREATE TABLE IF NOT EXISTS messages (
    id TEXT PRIMARY KEY NOT NULL,
    room_id TEXT NOT NULL REFERENCES rooms(id),
    sender_id TEXT NOT NULL,
    sender_name TEXT NOT NULL,
    content TEXT NOT NULL,
    mentions TEXT NOT NULL DEFAULT '[]',
    is_ai INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_messages_room_id ON messages(room_id, created_at);

-- Room members join table
CREATE TABLE IF NOT EXISTS room_members (
    room_id TEXT NOT NULL REFERENCES rooms(id),
    user_id TEXT NOT NULL REFERENCES users(id),
    joined_at TEXT NOT NULL DEFAULT (datetime('now')),
    PRIMARY KEY (room_id, user_id)
);

-- Invites table
CREATE TABLE IF NOT EXISTS invites (
    id TEXT PRIMARY KEY NOT NULL,
    room_id TEXT NOT NULL REFERENCES rooms(id),
    invited_by TEXT NOT NULL REFERENCES users(id),
    email TEXT NOT NULL,
    token TEXT UNIQUE NOT NULL,
    used INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (datetime('now'))
);