CREATE TABLE IF NOT EXISTS tasks (
    id          SERIAL PRIMARY KEY,
    title       VARCHAR(200) NOT NULL,
    description TEXT,
    status      VARCHAR(20) NOT NULL DEFAULT 'todo'
                CHECK (status IN ('todo', 'in_progress', 'done')),
    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE OR REPLACE FUNCTION update_updated_at()
RETURNS TRIGGER AS $$
BEGIN NEW.updated_at = NOW(); RETURN NEW; END;
$$ LANGUAGE plpgsql;

DROP TRIGGER IF EXISTS set_updated_at ON tasks;
CREATE TRIGGER set_updated_at
    BEFORE UPDATE ON tasks
    FOR EACH ROW EXECUTE FUNCTION update_updated_at();

INSERT INTO tasks (title, description, status) VALUES
    ('Set up Azure resources',    'Create App Service and PostgreSQL Flexible Server', 'done'),
    ('Build Docker image',        'Push image to Azure Container Registry',            'done'),
    ('Configure App Service',     'Set environment variables and container settings',  'in_progress'),
    ('Enable HTTPS',              'Built-in on azurewebsites.net — automatic',         'todo'),
    ('Write README',              'Document deployment and cost analysis',              'todo')
ON CONFLICT DO NOTHING;