-- +goose Up
ALTER TABLE order_authorizations
    ADD COLUMN command_sha256 TEXT
        CHECK (
            command_sha256 IS NULL
            OR (
                length(command_sha256) = 64
                AND command_sha256 NOT GLOB '*[^0-9a-f]*'
            )
        );

ALTER TABLE order_authorizations
    ADD COLUMN delivery_attempt_count INTEGER NOT NULL DEFAULT 0
        CHECK (delivery_attempt_count >= 0);

ALTER TABLE order_authorizations
    ADD COLUMN last_delivered_at TEXT;

CREATE TABLE device_order_command_ack_requests (
    device_id TEXT NOT NULL
        REFERENCES devices(id) ON UPDATE RESTRICT ON DELETE RESTRICT,
    idempotency_key TEXT NOT NULL
        CHECK (
            length(trim(idempotency_key)) > 0
            AND length(CAST(idempotency_key AS BLOB)) <= 128
        ),
    request_sha256 TEXT NOT NULL
        CHECK (
            length(request_sha256) = 64
            AND request_sha256 NOT GLOB '*[^0-9a-f]*'
        ),
    task_id TEXT NOT NULL
        REFERENCES purchase_tasks(id) ON UPDATE RESTRICT ON DELETE RESTRICT,
    authorization_id TEXT NOT NULL
        REFERENCES order_authorizations(id)
            ON UPDATE RESTRICT ON DELETE RESTRICT,
    created_at TEXT NOT NULL,
    PRIMARY KEY (device_id, idempotency_key)
);

ALTER TABLE task_events RENAME TO task_events_v8;

CREATE TABLE task_events (
    id TEXT PRIMARY KEY NOT NULL
        CHECK (length(id) = 36),
    task_id TEXT NOT NULL
        REFERENCES purchase_tasks(id) ON UPDATE RESTRICT ON DELETE CASCADE,
    event_type TEXT NOT NULL
        CHECK (
            event_type IN (
                'TASK_CREATED',
                'TASK_CLAIMED',
                'TASK_RECLAIMED',
                'TASK_RELEASED',
                'TASK_STARTED',
                'TASK_CANCEL_REQUESTED',
                'TASK_CANCELED',
                'CANDIDATES_READY',
                'ORDER_AUTHORIZATION_CREATED',
                'ORDER_AUTHORIZATION_DELIVERED',
                'ORDER_AUTHORIZATION_ACKNOWLEDGED'
            )
        ),
    message TEXT NOT NULL,
    occurred_at TEXT NOT NULL,
    actor_user_id TEXT
        REFERENCES users(id) ON UPDATE RESTRICT ON DELETE RESTRICT,
    actor_device_id TEXT
        REFERENCES devices(id) ON UPDATE RESTRICT ON DELETE RESTRICT
);

INSERT INTO task_events (
    id, task_id, event_type, message, occurred_at,
    actor_user_id, actor_device_id
)
SELECT
    id, task_id, event_type, message, occurred_at,
    actor_user_id, actor_device_id
FROM task_events_v8;

DROP TABLE task_events_v8;

CREATE INDEX task_events_task_occurred_idx
    ON task_events (task_id, occurred_at ASC, id ASC);

CREATE INDEX task_events_actor_user_idx
    ON task_events (actor_user_id, occurred_at DESC, id DESC);

CREATE INDEX task_events_actor_device_idx
    ON task_events (actor_device_id, occurred_at DESC, id DESC);

-- +goose Down
CREATE TEMP TABLE device_order_commands_v9_down_guard (
    allowed INTEGER NOT NULL
        CHECK (allowed = 1)
);

INSERT INTO device_order_commands_v9_down_guard (allowed)
SELECT CASE
    WHEN EXISTS (SELECT 1 FROM device_order_command_ack_requests)
      OR EXISTS (
        SELECT 1
        FROM order_authorizations
        WHERE command_sha256 IS NOT NULL
           OR delivery_attempt_count > 0
           OR last_delivered_at IS NOT NULL
           OR status IN ('DELIVERED', 'ACKNOWLEDGED')
      )
      OR EXISTS (
        SELECT 1
        FROM task_events
        WHERE event_type IN (
            'ORDER_AUTHORIZATION_DELIVERED',
            'ORDER_AUTHORIZATION_ACKNOWLEDGED'
        )
      )
    THEN 0
    ELSE 1
END;

DROP TABLE device_order_commands_v9_down_guard;
DROP TABLE device_order_command_ack_requests;

ALTER TABLE task_events RENAME TO task_events_v9;

CREATE TABLE task_events (
    id TEXT PRIMARY KEY NOT NULL
        CHECK (length(id) = 36),
    task_id TEXT NOT NULL
        REFERENCES purchase_tasks(id) ON UPDATE RESTRICT ON DELETE CASCADE,
    event_type TEXT NOT NULL
        CHECK (
            event_type IN (
                'TASK_CREATED',
                'TASK_CLAIMED',
                'TASK_RECLAIMED',
                'TASK_RELEASED',
                'TASK_STARTED',
                'TASK_CANCEL_REQUESTED',
                'TASK_CANCELED',
                'CANDIDATES_READY',
                'ORDER_AUTHORIZATION_CREATED'
            )
        ),
    message TEXT NOT NULL,
    occurred_at TEXT NOT NULL,
    actor_user_id TEXT
        REFERENCES users(id) ON UPDATE RESTRICT ON DELETE RESTRICT,
    actor_device_id TEXT
        REFERENCES devices(id) ON UPDATE RESTRICT ON DELETE RESTRICT
);

INSERT INTO task_events (
    id, task_id, event_type, message, occurred_at,
    actor_user_id, actor_device_id
)
SELECT
    id, task_id, event_type, message, occurred_at,
    actor_user_id, actor_device_id
FROM task_events_v9;

DROP TABLE task_events_v9;

CREATE INDEX task_events_task_occurred_idx
    ON task_events (task_id, occurred_at ASC, id ASC);

CREATE INDEX task_events_actor_user_idx
    ON task_events (actor_user_id, occurred_at DESC, id DESC);

CREATE INDEX task_events_actor_device_idx
    ON task_events (actor_device_id, occurred_at DESC, id DESC);

ALTER TABLE order_authorizations DROP COLUMN last_delivered_at;
ALTER TABLE order_authorizations DROP COLUMN delivery_attempt_count;
ALTER TABLE order_authorizations DROP COLUMN command_sha256;