-- +goose Up
CREATE TABLE freight_item_images (
    freight_order_item_id TEXT PRIMARY KEY NOT NULL
        REFERENCES freight_order_items(id)
            ON UPDATE RESTRICT ON DELETE CASCADE,
    product_thumb_ref TEXT NOT NULL
        CHECK (
            product_thumb_ref GLOB '[1-9]*'
            AND product_thumb_ref NOT GLOB '*[^0-9]*'
            AND length(product_thumb_ref) <= 20
        ),
    status TEXT NOT NULL CHECK (status IN ('READY', 'MISSING', 'FAILED')),
    media_type TEXT,
    size_bytes INTEGER,
    sha256 TEXT,
    storage_key TEXT UNIQUE,
    error_code TEXT
        CHECK (
            error_code IS NULL
            OR (
                length(trim(error_code)) > 0
                AND length(CAST(error_code AS BLOB)) <= 64
            )
        ),
    attempt_count INTEGER NOT NULL CHECK (attempt_count >= 1),
    updated_at TEXT NOT NULL,
    CHECK (
        (
            status = 'READY'
            AND media_type = 'image/jpeg'
            AND size_bytes > 0
            AND length(sha256) = 64
            AND sha256 NOT GLOB '*[^0-9a-f]*'
            AND length(trim(storage_key)) > 0
            AND length(CAST(storage_key AS BLOB)) <= 512
            AND error_code IS NULL
        )
        OR (
            status IN ('MISSING', 'FAILED')
            AND media_type IS NULL
            AND size_bytes IS NULL
            AND sha256 IS NULL
            AND storage_key IS NULL
            AND error_code IS NOT NULL
        )
    )
);

CREATE INDEX freight_item_images_status_idx
    ON freight_item_images (status, updated_at, freight_order_item_id);

-- +goose Down
CREATE TEMP TABLE freight_item_images_v16_down_guard (
    allowed INTEGER NOT NULL CHECK (allowed = 1)
);

INSERT INTO freight_item_images_v16_down_guard (allowed)
SELECT CASE
    WHEN EXISTS (SELECT 1 FROM freight_item_images)
    THEN 0
    ELSE 1
END;

DROP TABLE freight_item_images_v16_down_guard;
DROP TABLE freight_item_images;