-- Create polls table
CREATE TABLE IF NOT EXISTS polls (
    id SERIAL PRIMARY KEY,
    title VARCHAR(255) NOT NULL,
    description TEXT,
    type VARCHAR(50) NOT NULL DEFAULT 'single',
    status VARCHAR(20) NOT NULL DEFAULT 'draft',
    start_date TIMESTAMP,
    end_date TIMESTAMP,
    allow_multiple BOOLEAN DEFAULT FALSE,
    max_choices INTEGER DEFAULT 1,
    show_results VARCHAR(20) DEFAULT 'after_vote',
    require_auth BOOLEAN DEFAULT FALSE,
    allow_guest_vote BOOLEAN DEFAULT TRUE,
    featured BOOLEAN DEFAULT FALSE,
    category_id INTEGER REFERENCES categories(id) ON DELETE SET NULL,
    related_match_id INTEGER,
    image_url VARCHAR(500),
    total_votes INTEGER DEFAULT 0,
    created_by INTEGER REFERENCES users(id) ON DELETE SET NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    deleted_at TIMESTAMP
);

-- Create poll_options table
CREATE TABLE IF NOT EXISTS poll_options (
    id SERIAL PRIMARY KEY,
    poll_id INTEGER NOT NULL REFERENCES polls(id) ON DELETE CASCADE,
    text VARCHAR(255) NOT NULL,
    description TEXT,
    image_url VARCHAR(500),
    display_order INTEGER DEFAULT 0,
    vote_count INTEGER DEFAULT 0,
    player_id INTEGER REFERENCES players(id) ON DELETE SET NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Create poll_votes table
CREATE TABLE IF NOT EXISTS poll_votes (
    id SERIAL PRIMARY KEY,
    poll_id INTEGER NOT NULL REFERENCES polls(id) ON DELETE CASCADE,
    option_id INTEGER NOT NULL REFERENCES poll_options(id) ON DELETE CASCADE,
    user_id INTEGER REFERENCES users(id) ON DELETE SET NULL,
    ip_hash VARCHAR(64),
    user_agent VARCHAR(500),
    session_token VARCHAR(100),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Create indexes for performance
CREATE INDEX IF NOT EXISTS idx_polls_status ON polls(status);
CREATE INDEX IF NOT EXISTS idx_polls_featured ON polls(featured);
CREATE INDEX IF NOT EXISTS idx_polls_start_date ON polls(start_date);
CREATE INDEX IF NOT EXISTS idx_polls_end_date ON polls(end_date);
CREATE INDEX IF NOT EXISTS idx_polls_deleted_at ON polls(deleted_at);

CREATE INDEX IF NOT EXISTS idx_poll_options_poll_id ON poll_options(poll_id);
CREATE INDEX IF NOT EXISTS idx_poll_options_display_order ON poll_options(display_order);

CREATE INDEX IF NOT EXISTS idx_poll_votes_poll_id ON poll_votes(poll_id);
CREATE INDEX IF NOT EXISTS idx_poll_votes_option_id ON poll_votes(option_id);
CREATE INDEX IF NOT EXISTS idx_poll_votes_user_id ON poll_votes(user_id);
CREATE INDEX IF NOT EXISTS idx_poll_votes_ip_hash ON poll_votes(ip_hash);
CREATE INDEX IF NOT EXISTS idx_poll_votes_session_token ON poll_votes(session_token);

-- Add trigger for updated_at
CREATE OR REPLACE FUNCTION update_polls_updated_at()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ LANGUAGE plpgsql;

CREATE TRIGGER trigger_polls_updated_at
    BEFORE UPDATE ON polls
    FOR EACH ROW
    EXECUTE FUNCTION update_polls_updated_at();

CREATE TRIGGER trigger_poll_options_updated_at
    BEFORE UPDATE ON poll_options
    FOR EACH ROW
    EXECUTE FUNCTION update_polls_updated_at();