-- Users table
CREATE TABLE IF NOT EXISTS users (
    id SERIAL PRIMARY KEY,
    username VARCHAR(255) NOT NULL UNIQUE,
    password_hash TEXT NOT NULL,
    role VARCHAR(50) NOT NULL DEFAULT 'user',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- God Logs table
CREATE TABLE IF NOT EXISTS god_logs (
    id SERIAL PRIMARY KEY,
    god_user_id INTEGER NOT NULL,
    action TEXT NOT NULL,
    details TEXT,
    timestamp TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (god_user_id) REFERENCES users(id) ON DELETE CASCADE
);

-- Personas table
CREATE TABLE IF NOT EXISTS personas (
    id SERIAL PRIMARY KEY,
    owner_id INTEGER NOT NULL,
    name VARCHAR(255) NOT NULL,
    title VARCHAR(255),
    bio TEXT,
    theories JSONB, -- JSON string in SQLite, JSONB in PG
    stance TEXT,
    system_prompt TEXT,
    is_public BOOLEAN DEFAULT FALSE,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (owner_id) REFERENCES users(id) ON DELETE CASCADE
);

-- Moderators table
CREATE TABLE IF NOT EXISTS moderators (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    title VARCHAR(255) DEFAULT '主持人',
    bio TEXT,
    system_prompt TEXT,
    greeting_template TEXT,
    closing_template TEXT,
    summary_template TEXT,
    creator_id INTEGER NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (creator_id) REFERENCES users(id) ON DELETE CASCADE
);

-- Forums table
CREATE TABLE IF NOT EXISTS forums (
    id SERIAL PRIMARY KEY,
    topic TEXT NOT NULL,
    creator_id INTEGER NOT NULL,
    moderator_id INTEGER,
    status VARCHAR(50) DEFAULT 'active',
    summary_history JSONB DEFAULT '[]',
    start_time TIMESTAMP WITH TIME ZONE,
    end_time TIMESTAMP WITH TIME ZONE,
    duration_minutes INTEGER DEFAULT 30,
    FOREIGN KEY (creator_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (moderator_id) REFERENCES moderators(id)
);

-- Forum Participants table
CREATE TABLE IF NOT EXISTS forum_participants (
    forum_id INTEGER NOT NULL,
    persona_id INTEGER NOT NULL,
    thoughts_history JSONB DEFAULT '[]',
    PRIMARY KEY (forum_id, persona_id),
    FOREIGN KEY (forum_id) REFERENCES forums(id) ON DELETE CASCADE,
    FOREIGN KEY (persona_id) REFERENCES personas(id) ON DELETE CASCADE
);

-- Messages table
CREATE TABLE IF NOT EXISTS messages (
    id SERIAL PRIMARY KEY,
    forum_id INTEGER NOT NULL,
    persona_id INTEGER,
    moderator_id INTEGER,
    speaker_name VARCHAR(255) NOT NULL,
    content TEXT NOT NULL,
    turn_count INTEGER DEFAULT 0,
    thought TEXT,
    timestamp TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (forum_id) REFERENCES forums(id) ON DELETE CASCADE,
    FOREIGN KEY (persona_id) REFERENCES personas(id),
    FOREIGN KEY (moderator_id) REFERENCES moderators(id)
);

-- Observations table
CREATE TABLE IF NOT EXISTS observations (
    id SERIAL PRIMARY KEY,
    user_id INTEGER NOT NULL,
    forum_id INTEGER NOT NULL,
    joined_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    left_at TIMESTAMP WITH TIME ZONE,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (forum_id) REFERENCES forums(id) ON DELETE CASCADE
);

-- System Logs table
CREATE TABLE IF NOT EXISTS system_logs (
    id SERIAL PRIMARY KEY,
    forum_id INTEGER NOT NULL,
    level VARCHAR(50) DEFAULT 'info',
    source VARCHAR(255),
    content TEXT NOT NULL,
    timestamp TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (forum_id) REFERENCES forums(id) ON DELETE CASCADE
);