package com.baiyue.lastleg.dispatch;

import com.baiyue.lastleg.dispatch.mapper.DispatchCandidateMapper;
import org.apache.ibatis.annotations.Select;
import org.junit.jupiter.api.Test;

import java.lang.reflect.Method;
import java.util.List;

import static org.junit.jupiter.api.Assertions.assertTrue;

class DispatchCandidateMapperContractTest {
    private static final List<String> CONSTRUCTOR_ALIASES = List.of(
        "planId", "planPalletId", "warehousePalletId", "orderId", "customerId", "customerName",
        "planNo", "orderType", "volumeWeightKg", "containerNo", "appointmentAt", "expectedLoadingAt",
        "overseasWarehouseId", "overseasWarehouseName", "orderNo", "orderRefs", "inboundCode", "palletNo",
        "destinationWarehouseId", "destinationWarehouseCode", "destinationWarehouseName", "fbaWarehouseCode",
        "packageCount", "volumeCbm", "sourceStage", "cartonMarks"
    );

    @Test
    void candidateQueriesKeepRecordConstructorColumnOrder() throws Exception {
        assertConstructorColumnOrder(DispatchCandidateMapper.class.getMethod("available",
            String.class, List.class, String.class, String.class, String.class, String.class));
        assertConstructorColumnOrder(DispatchCandidateMapper.class.getMethod("lockSelected",
            String.class, List.class));
    }

    @Test
    void selectedReceivedPalletMustStillHaveAvailableInventory() throws Exception {
        Method method = DispatchCandidateMapper.class.getMethod("lockSelected", String.class, List.class);
        String sql = String.join(" ", method.getAnnotation(Select.class).value());

        assertTrue(sql.contains("p.warehouse_pallet_id IS NULL OR EXISTS"));
        assertTrue(sql.contains("pos.available_packages &gt; 0"));
    }

    @Test
    void candidateWarehouseComesFromPhysicalInventoryOrFrozenInboundPlan() throws Exception {
        for (Method method : List.of(
            DispatchCandidateMapper.class.getMethod("available", String.class, List.class, String.class,
                String.class, String.class, String.class),
            DispatchCandidateMapper.class.getMethod("lockSelected", String.class, List.class))) {
            String sql = String.join(" ", method.getAnnotation(Select.class).value());
            assertTrue(sql.contains("CASE WHEN p.warehouse_pallet_id IS NOT NULL"));
            assertTrue(sql.contains("pos.overseas_warehouse_id"));
            assertTrue(sql.contains("CAST(ip.overseas_warehouse_id AS CHAR)"));
            assertTrue(sql.contains("ll_inventory_balance"));
        }
    }

    private void assertConstructorColumnOrder(Method method) {
        String sql = String.join(" ", method.getAnnotation(Select.class).value());
        int previous = -1;
        for (String alias : CONSTRUCTOR_ALIASES) {
            int current = sql.indexOf(" AS " + alias, previous + 1);
            assertTrue(current > previous,
                () -> method.getName() + " must select alias " + alias + " in record constructor order");
            previous = current;
        }
    }
}