-- Migration 019: Opportunity comment attachments
-- Captures uploaded files that belong to a pipeline comment thread

CREATE TABLE IF NOT EXISTS pipeline_opportunity_comment_attachments (
    id SERIAL PRIMARY KEY,
    opportunity_id INTEGER NOT NULL REFERENCES pipeline_opportunities(id) ON DELETE CASCADE,
    comment_id INTEGER NOT NULL REFERENCES pipeline_opportunity_comments(id) ON DELETE CASCADE,
    filename VARCHAR(255) NOT NULL,
    content_type VARCHAR(100),
    size_bytes INTEGER,
    stored_name TEXT NOT NULL,
    uploaded_by_user_id INTEGER,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (uploaded_by_user_id) REFERENCES users(user_id) ON DELETE SET NULL
);

CREATE INDEX IF NOT EXISTS idx_pipeline_comment_attachments_comment_id ON pipeline_opportunity_comment_attachments(comment_id);
CREATE INDEX IF NOT EXISTS idx_pipeline_comment_attachments_opportunity_id ON pipeline_opportunity_comment_attachments(opportunity_id);

COMMENT ON TABLE pipeline_opportunity_comment_attachments IS 'User uploaded files stored alongside pipeline opportunity comments';