CREATE TABLE IF NOT EXISTS drift_sources (
    id SERIAL PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    connector_type VARCHAR(50) NOT NULL,
    config_json JSONB DEFAULT '{}'::jsonb,
    enabled BOOLEAN NOT NULL DEFAULT TRUE,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS drift_devices (
    id SERIAL PRIMARY KEY,
    source_id INTEGER REFERENCES drift_sources(id) ON DELETE SET NULL,
    external_id VARCHAR(200),
    name VARCHAR(200),
    customer_name VARCHAR(200),
    site_name VARCHAR(200),
    service_name VARCHAR(200),
    metadata_json JSONB DEFAULT '{}'::jsonb,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    UNIQUE (source_id, external_id)
);

CREATE TABLE IF NOT EXISTS drift_events (
    id SERIAL PRIMARY KEY,
    source_id INTEGER REFERENCES drift_sources(id) ON DELETE SET NULL,
    source_event_id VARCHAR(200),
    severity VARCHAR(50) NOT NULL DEFAULT 'info',
    status VARCHAR(50) NOT NULL DEFAULT 'new',
    customer_name VARCHAR(200),
    site_name VARCHAR(200),
    device_name VARCHAR(200),
    service_name VARCHAR(200),
    message TEXT,
    started_at TIMESTAMP,
    updated_at TIMESTAMP,
    resolved_at TIMESTAMP,
    duration_minutes INTEGER,
    raw_json JSONB DEFAULT '{}'::jsonb,
    tags JSONB DEFAULT '[]'::jsonb,
    ticket_id INTEGER,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS drift_event_history (
    id SERIAL PRIMARY KEY,
    event_id INTEGER REFERENCES drift_events(id) ON DELETE CASCADE,
    status VARCHAR(50) NOT NULL,
    message TEXT,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS drift_ticket_links (
    id SERIAL PRIMARY KEY,
    event_id INTEGER REFERENCES drift_events(id) ON DELETE CASCADE,
    sag_id INTEGER NOT NULL,
    link_type VARCHAR(50) NOT NULL DEFAULT 'created',
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    UNIQUE (event_id, sag_id)
);