SET XACT_ABORT ON;
BEGIN TRANSACTION;

IF OBJECT_ID('dbo.wcs_transport_order', 'U') IS NULL
BEGIN
    CREATE TABLE dbo.wcs_transport_order (
        order_id varchar(64) NOT NULL PRIMARY KEY,
        external_request_id varchar(128) NOT NULL,
        order_type varchar(32) NOT NULL,
        load_id varchar(128) NULL,
        source_code varchar(128) NOT NULL,
        destination_code varchar(128) NOT NULL,
        priority int NOT NULL,
        order_state varchar(32) NOT NULL,
        workflow_id varchar(64) NULL,
        result_code varchar(64) NULL,
        state_reason nvarchar(512) NULL,
        state_version bigint NOT NULL,
        created_time datetime2(3) NOT NULL,
        updated_time datetime2(3) NOT NULL,
        CONSTRAINT uk_wcs_transport_order_external_request
            UNIQUE (external_request_id)
    );
END;

IF OBJECT_ID('dbo.wcs_workflow_instance', 'U') IS NULL
BEGIN
    CREATE TABLE dbo.wcs_workflow_instance (
        workflow_id varchar(64) NOT NULL PRIMARY KEY,
        order_id varchar(64) NOT NULL,
        workflow_state varchar(32) NOT NULL,
        state_version bigint NOT NULL,
        CONSTRAINT fk_wcs_workflow_order FOREIGN KEY (order_id)
            REFERENCES dbo.wcs_transport_order(order_id),
        CONSTRAINT uk_wcs_workflow_order UNIQUE (order_id)
    );
END;

IF OBJECT_ID('dbo.wcs_task_step', 'U') IS NULL
BEGIN
    CREATE TABLE dbo.wcs_task_step (
        step_id varchar(128) NOT NULL PRIMARY KEY,
        workflow_id varchar(64) NOT NULL,
        step_key varchar(64) NOT NULL,
        step_type varchar(32) NOT NULL,
        required_flag bit NOT NULL,
        step_state varchar(32) NOT NULL,
        reason_code varchar(128) NULL,
        vehicle_id varchar(64) NULL,
        state_version bigint NOT NULL,
        CONSTRAINT fk_wcs_task_step_workflow FOREIGN KEY (workflow_id)
            REFERENCES dbo.wcs_workflow_instance(workflow_id),
        CONSTRAINT uk_wcs_task_step_key UNIQUE (workflow_id, step_key)
    );
END;

IF OBJECT_ID('dbo.wcs_task_dependency', 'U') IS NULL
BEGIN
    CREATE TABLE dbo.wcs_task_dependency (
        workflow_id varchar(64) NOT NULL,
        step_key varchar(64) NOT NULL,
        depends_on_step_key varchar(64) NOT NULL,
        CONSTRAINT pk_wcs_task_dependency PRIMARY KEY (
            workflow_id, step_key, depends_on_step_key),
        CONSTRAINT fk_wcs_task_dependency_workflow FOREIGN KEY (workflow_id)
            REFERENCES dbo.wcs_workflow_instance(workflow_id)
    );
END;

IF OBJECT_ID('dbo.wcs_domain_event', 'U') IS NULL
BEGIN
    CREATE TABLE dbo.wcs_domain_event (
        event_id varchar(128) NOT NULL PRIMARY KEY,
        aggregate_id varchar(64) NOT NULL,
        event_sequence bigint NOT NULL,
        event_type varchar(64) NOT NULL,
        occurred_time datetime2(3) NOT NULL,
        payload_json nvarchar(max) NULL,
        published_flag bit NOT NULL CONSTRAINT df_wcs_domain_event_published DEFAULT (0),
        CONSTRAINT uk_wcs_domain_event_sequence
            UNIQUE (aggregate_id, event_sequence)
    );
END;

COMMIT TRANSACTION;