CREATE TABLE image_uploads (
    id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    -- Discord user ID from the authenticated session, including guild-only users.
    uploader BIGINT UNSIGNED NOT NULL,
    path VARCHAR(512) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    orphaned_at DATETIME DEFAULT NULL,
    UNIQUE INDEX image_uploads_path (path),
    INDEX image_uploads_uploader (uploader),
    INDEX image_uploads_orphaned_at (orphaned_at)
);

ALTER TABLE reminders
    ADD COLUMN avatar_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminders_avatar_id (avatar_id),
    ADD FOREIGN KEY (avatar_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_image_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminders_embed_image_id (embed_image_id),
    ADD FOREIGN KEY (embed_image_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_thumbnail_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminders_embed_thumbnail_id (embed_thumbnail_id),
    ADD FOREIGN KEY (embed_thumbnail_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_author_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminders_embed_author_id (embed_author_id),
    ADD FOREIGN KEY (embed_author_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_footer_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminders_embed_footer_id (embed_footer_id),
    ADD FOREIGN KEY (embed_footer_id) REFERENCES image_uploads (id) ON DELETE RESTRICT;

ALTER TABLE reminder_template
    ADD COLUMN avatar_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminder_template_avatar_id (avatar_id),
    ADD FOREIGN KEY (avatar_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_image_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminder_template_embed_image_id (embed_image_id),
    ADD FOREIGN KEY (embed_image_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_thumbnail_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminder_template_embed_thumbnail_id (embed_thumbnail_id),
    ADD FOREIGN KEY (embed_thumbnail_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_author_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminder_template_embed_author_id (embed_author_id),
    ADD FOREIGN KEY (embed_author_id) REFERENCES image_uploads (id) ON DELETE RESTRICT,
    ADD COLUMN embed_footer_id BIGINT UNSIGNED DEFAULT NULL,
    ADD INDEX reminder_template_embed_footer_id (embed_footer_id),
    ADD FOREIGN KEY (embed_footer_id) REFERENCES image_uploads (id) ON DELETE RESTRICT;