-- +goose Up
CREATE TABLE procurement_reference_sources (
    procurement_request_id TEXT PRIMARY KEY NOT NULL
        REFERENCES procurement_requests(id)
            ON UPDATE RESTRICT ON DELETE RESTRICT,
    origin TEXT NOT NULL
        CHECK (origin IN ('ERP_FREIGHT_IMAGE', 'MANUAL_UPLOAD')),
    product_thumb_ref TEXT
        CHECK (
            product_thumb_ref IS NULL
            OR (
                product_thumb_ref GLOB '[1-9]*'
                AND product_thumb_ref NOT GLOB '*[^0-9]*'
                AND length(product_thumb_ref) <= 20
            )
        ),
    source_image_sha256 TEXT
        CHECK (
            source_image_sha256 IS NULL
            OR (
                length(source_image_sha256) = 64
                AND source_image_sha256 NOT GLOB '*[^0-9a-f]*'
            )
        ),
    bound_at TEXT NOT NULL,
    CHECK (
        (origin = 'ERP_FREIGHT_IMAGE'
            AND product_thumb_ref IS NOT NULL
            AND source_image_sha256 IS NOT NULL)
        OR (origin = 'MANUAL_UPLOAD'
            AND product_thumb_ref IS NULL
            AND source_image_sha256 IS NULL)
    )
);

INSERT INTO procurement_reference_sources (
    procurement_request_id, origin, product_thumb_ref,
    source_image_sha256, bound_at
)
SELECT id, 'MANUAL_UPLOAD', NULL, NULL, updated_at
FROM procurement_requests
WHERE reference_asset_id IS NOT NULL;

CREATE INDEX procurement_reference_sources_origin_idx
    ON procurement_reference_sources (origin, bound_at, procurement_request_id);

-- +goose Down
CREATE TEMP TABLE procurement_reference_sources_v17_down_guard (
    allowed INTEGER NOT NULL CHECK (allowed = 1)
);

INSERT INTO procurement_reference_sources_v17_down_guard (allowed)
SELECT CASE
    WHEN EXISTS (SELECT 1 FROM procurement_reference_sources)
    THEN 0
    ELSE 1
END;

DROP TABLE procurement_reference_sources_v17_down_guard;
DROP INDEX procurement_reference_sources_origin_idx;
DROP TABLE procurement_reference_sources;