-- Create users table
CREATE TABLE IF NOT EXISTS users (
    id BIGSERIAL PRIMARY KEY,
    username VARCHAR(255) UNIQUE NOT NULL,
    password_hash VARCHAR(255),
    is_admin BOOLEAN DEFAULT false,
    is_streamer BOOLEAN DEFAULT false,
    is_pgp_only BOOLEAN DEFAULT false,
    pgp_only_enabled_at TIMESTAMP WITH TIME ZONE,
    bio TEXT DEFAULT '',
    avatar_url VARCHAR(255),
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Create pgp_keys table
CREATE TABLE IF NOT EXISTS pgp_keys (
    id BIGSERIAL PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    public_key TEXT NOT NULL,
    fingerprint VARCHAR(40) UNIQUE NOT NULL,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Create realms table (removed display_name and description)
CREATE TABLE IF NOT EXISTS realms (
    id BIGSERIAL PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    name VARCHAR(255) UNIQUE NOT NULL,
    stream_key VARCHAR(64) UNIQUE NOT NULL,
    is_active BOOLEAN DEFAULT true,
    is_live BOOLEAN DEFAULT false,
    viewer_count INTEGER DEFAULT 0,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Create stream_keys table (deprecated, kept for compatibility)
CREATE TABLE IF NOT EXISTS stream_keys (
    id BIGSERIAL PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    key VARCHAR(64) UNIQUE NOT NULL,
    is_active BOOLEAN DEFAULT true,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Create indexes
CREATE INDEX idx_users_username ON users(username);
CREATE INDEX idx_users_is_streamer ON users(is_streamer);
CREATE INDEX idx_users_is_pgp_only ON users(is_pgp_only);
CREATE INDEX idx_pgp_keys_user_id ON pgp_keys(user_id);
CREATE INDEX idx_pgp_keys_fingerprint ON pgp_keys(fingerprint);
CREATE INDEX idx_realms_user_id ON realms(user_id);
CREATE INDEX idx_realms_name ON realms(name);
CREATE INDEX idx_realms_stream_key ON realms(stream_key);
CREATE INDEX idx_realms_is_live ON realms(is_live);
CREATE INDEX idx_stream_keys_user_id ON stream_keys(user_id);
CREATE INDEX idx_stream_keys_key ON stream_keys(key) WHERE is_active = true;
CREATE INDEX idx_stream_keys_active ON stream_keys(is_active);

-- Create updated_at trigger
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TRIGGER update_users_updated_at BEFORE UPDATE ON users
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

CREATE TRIGGER update_realms_updated_at BEFORE UPDATE ON realms
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

CREATE TRIGGER update_stream_keys_updated_at BEFORE UPDATE ON stream_keys
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Create function to deactivate old keys when a new one is created
CREATE OR REPLACE FUNCTION deactivate_old_stream_keys()
RETURNS TRIGGER AS $$
BEGIN
    IF NEW.is_active = true THEN
        UPDATE stream_keys 
        SET is_active = false 
        WHERE user_id = NEW.user_id 
        AND id != NEW.id 
        AND is_active = true;
    END IF;
    RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TRIGGER deactivate_old_keys AFTER INSERT OR UPDATE ON stream_keys
    FOR EACH ROW EXECUTE FUNCTION deactivate_old_stream_keys();

-- Add constraint to ensure pgp_only_enabled_at is set when is_pgp_only is true
CREATE OR REPLACE FUNCTION check_pgp_only_timestamp()
RETURNS TRIGGER AS $$
BEGIN
    IF NEW.is_pgp_only = true AND NEW.pgp_only_enabled_at IS NULL THEN
        NEW.pgp_only_enabled_at = CURRENT_TIMESTAMP;
    END IF;
    RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TRIGGER ensure_pgp_only_timestamp BEFORE INSERT OR UPDATE ON users
    FOR EACH ROW EXECUTE FUNCTION check_pgp_only_timestamp();