package com.zy.core.dispatch;

import com.zy.common.utils.RedisUtil;
import com.zy.core.cache.MessageQueue;
import com.zy.core.enums.SlaveType;
import com.zy.core.enums.StationCommandType;
import com.zy.core.model.command.StationCommand;
import com.zy.core.move.StationMoveCoordinator;
import org.junit.jupiter.api.Test;

import java.util.HashMap;
import java.util.Map;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

class StationCommandDispatcherTest {

    @Test
    void dispatch_acceptsMoveCommandAndReturnsQueueDepth() {
        StationCommandDispatcher dispatcher = new StationCommandDispatcher();

        StationCommand command = new StationCommand();
        command.setCommandType(StationCommandType.MOVE);
        command.setTaskNo(100);
        command.setStationId(10);
        command.setTargetStaNo(20);

        MessageQueue.init(SlaveType.Devp, 1);
        try {
            StationCommandDispatchResult result = dispatcher.dispatch(1, command, "unit-test", "move");

            assertTrue(result.isAccepted());
            assertEquals("accepted", result.getReason());
            assertEquals(1, result.getQueueDepth());
            assertEquals("unit-test", result.getSource());
            assertEquals("move", result.getScene());
        } finally {
            MessageQueue.clear(SlaveType.Devp, 1);
        }
    }

    @Test
    void dispatch_suppressesDuplicateMoveCommandWithinDedupWindow() {
        RedisUtil redisUtil = mock(RedisUtil.class);
        StationMoveCoordinator coordinator = mock(StationMoveCoordinator.class);
        StationCommandDispatcher dispatcher = new StationCommandDispatcher(redisUtil, coordinator);
        Map<String, Object> dedupStore = new HashMap<>();

        when(redisUtil.get(anyString())).thenAnswer(invocation -> dedupStore.get(invocation.getArgument(0)));
        when(redisUtil.set(anyString(), eq("lock"), anyLong())).thenAnswer(invocation -> {
            dedupStore.put(invocation.getArgument(0), invocation.getArgument(1));
            return true;
        });
        when(coordinator.buildPathSignatureHash(org.mockito.ArgumentMatchers.any(StationCommand.class)))
                .thenReturn("same-path");

        StationCommand command = new StationCommand();
        command.setCommandType(StationCommandType.MOVE);
        command.setTaskNo(100);
        command.setStationId(10);
        command.setTargetStaNo(20);

        MessageQueue.init(SlaveType.Devp, 1);
        try {
            StationCommandDispatchResult first = dispatcher.dispatch(1, command, "unit-test", "move");
            StationCommandDispatchResult second = dispatcher.dispatch(1, command, "unit-test", "move");

            assertTrue(first.isAccepted());
            assertFalse(second.isAccepted());
            assertEquals("dedup-suppressed", second.getReason());
            assertEquals(1, second.getQueueDepth());
        } finally {
            MessageQueue.clear(SlaveType.Devp, 1);
        }
    }

    @Test
    void dispatch_rejectsWhenDevpQueueIsNotInitialized() {
        StationCommandDispatcher dispatcher = new StationCommandDispatcher();

        StationCommand command = new StationCommand();
        command.setCommandType(StationCommandType.MOVE);
        command.setTaskNo(100);
        command.setStationId(10);
        command.setTargetStaNo(20);

        StationCommandDispatchResult result = dispatcher.dispatch(999, command, "unit-test", "move");

        assertFalse(result.isAccepted());
        assertEquals("queue-not-initialized", result.getReason());
        assertEquals(0, result.getQueueDepth());
    }
}