-- 027_Attachments.sql
-- Creates attachment read model table for document/file storage
-- Used by AI Bookkeeper for uploaded invoices/receipts

CREATE TABLE IF NOT EXISTS attachment_read_models (
    -- EventFlow standard columns
    aggregate_id VARCHAR(255) PRIMARY KEY,
    create_time TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_time TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    last_aggregate_sequence_number INT NOT NULL DEFAULT 1,

    -- Business columns
    company_id VARCHAR(255) NOT NULL,
    file_name VARCHAR(500) NOT NULL,
    original_file_name VARCHAR(500) NOT NULL,
    content_type VARCHAR(100) NOT NULL,
    file_size BIGINT NOT NULL,
    storage_path VARCHAR(1000) NOT NULL,
    uploaded_by VARCHAR(255) NOT NULL,
    uploaded_at TIMESTAMPTZ NOT NULL,
    draft_id VARCHAR(255),
    transaction_id VARCHAR(255),
    retention_end_date TIMESTAMPTZ NOT NULL,
    is_deleted BOOLEAN NOT NULL DEFAULT FALSE,
    deleted_by VARCHAR(255),
    delete_reason TEXT,
    deleted_at TIMESTAMPTZ,

    CONSTRAINT fk_attachment_company
        FOREIGN KEY (company_id) REFERENCES company_read_models(aggregate_id) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_attachment_company ON attachment_read_models(company_id);
CREATE INDEX IF NOT EXISTS idx_attachment_draft ON attachment_read_models(draft_id) WHERE draft_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_attachment_transaction ON attachment_read_models(transaction_id) WHERE transaction_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_attachment_not_deleted ON attachment_read_models(company_id, is_deleted) WHERE is_deleted = FALSE;