CREATE TABLE inventory_balances (
    id BIGINT NOT NULL AUTO_INCREMENT,
    organization_id BIGINT NOT NULL,
    warehouse_id BIGINT NOT NULL,
    location_id BIGINT NOT NULL,
    material_id BIGINT NOT NULL,
    on_hand DECIMAL(20,6) NOT NULL DEFAULT 0,
    reserved DECIMAL(20,6) NOT NULL DEFAULT 0,
    locked DECIMAL(20,6) NOT NULL DEFAULT 0,
    in_transit DECIMAL(20,6) NOT NULL DEFAULT 0,
    version INT NOT NULL DEFAULT 1,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    UNIQUE KEY uk_inventory_balance_dimension (organization_id, warehouse_id, location_id, material_id),
    KEY idx_inventory_balances_material (organization_id, material_id),
    CONSTRAINT fk_inventory_balances_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT,
    CONSTRAINT fk_inventory_balances_warehouse FOREIGN KEY (warehouse_id) REFERENCES warehouses(id) ON DELETE RESTRICT,
    CONSTRAINT fk_inventory_balances_location FOREIGN KEY (location_id) REFERENCES warehouse_locations(id) ON DELETE RESTRICT,
    CONSTRAINT fk_inventory_balances_material FOREIGN KEY (material_id) REFERENCES materials(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE stock_warning_rules (
    id BIGINT NOT NULL AUTO_INCREMENT,
    organization_id BIGINT NOT NULL,
    warehouse_id BIGINT NOT NULL,
    material_id BIGINT NOT NULL,
    minimum_available DECIMAL(20,6) NOT NULL DEFAULT 0,
    enabled BOOLEAN NOT NULL DEFAULT TRUE,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    PRIMARY KEY (id),
    UNIQUE KEY uk_stock_warning_rules_dimension (organization_id, warehouse_id, material_id),
    CONSTRAINT fk_stock_warning_rules_org FOREIGN KEY (organization_id) REFERENCES organizations(id) ON DELETE RESTRICT,
    CONSTRAINT fk_stock_warning_rules_warehouse FOREIGN KEY (warehouse_id) REFERENCES warehouses(id) ON DELETE RESTRICT,
    CONSTRAINT fk_stock_warning_rules_material FOREIGN KEY (material_id) REFERENCES materials(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;