package org.springblade.modules.martial;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.junit.jupiter.api.*;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import org.junit.jupiter.params.provider.ValueSource;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Spy;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springblade.core.log.exception.ServiceException;
import org.springblade.modules.martial.mapper.MartialScoreMapper;
import org.springblade.modules.martial.pojo.entity.MartialScore;
import org.springblade.modules.martial.service.IMartialJudgeProjectService;
import org.springblade.modules.martial.service.impl.MartialScoreServiceImpl;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Arrays;
import java.util.Collections;
import java.util.Random;
import java.util.stream.Stream;

import static org.junit.jupiter.api.Assertions.*;
import static org.mockito.ArgumentMatchers.*;
import static org.mockito.Mockito.*;

/**
 * MartialScoreServiceImpl Tests - OpenAI Standard
 * Features: Property-Based Testing, Invariant Testing, Regression Tags
 */
@ExtendWith(MockitoExtension.class)
@DisplayName("OpenAI Standard: MartialScoreServiceImpl Tests")
class MartialScoreServiceOpenAITest {

    @Spy
    @InjectMocks
    private MartialScoreServiceImpl scoreService;

    @Mock
    private MartialScoreMapper scoreMapper;

    @Mock
    private IMartialJudgeProjectService judgeProjectService;

    // ========== Property-Based Testing ==========

    @Nested
    @DisplayName("Property-Based Testing")
    class PropertyBasedTests {

        @ParameterizedTest
        @MethodSource("org.springblade.modules.martial.MartialScoreServiceOpenAITest#randomValidScores")
        @DisplayName("Property: Any valid score [5.000-10.000] should return true")
        void property_validateScore_anyValidScore_shouldReturnTrue(BigDecimal score) {
            assertTrue(scoreService.validateScore(score),
                () -> "Score " + score + " should be valid");
        }

        @ParameterizedTest
        @MethodSource("org.springblade.modules.martial.MartialScoreServiceOpenAITest#randomInvalidScores")
        @DisplayName("Property: Any invalid score outside [5.000-10.000] should return false")
        void property_validateScore_anyInvalidScore_shouldReturnFalse(BigDecimal score) {
            assertFalse(scoreService.validateScore(score),
                () -> "Score " + score + " should be invalid");
        }
    }

    // ========== Invariant Testing ==========

    @Nested
    @DisplayName("Invariant Testing")
    class InvariantTests {

        @Test
        @DisplayName("Invariant: validateScore result must be consistent with range check")
        void invariant_validateScore_resultConsistentWithRange() {
            BigDecimal[] testCases = {
                new BigDecimal("5.000"), new BigDecimal("10.000"),
                new BigDecimal("4.999"), new BigDecimal("10.001"),
                new BigDecimal("7.500"), new BigDecimal("0.000"),
                new BigDecimal("-1.000"), new BigDecimal("15.000")
            };
            
            BigDecimal min = new BigDecimal("5.000");
            BigDecimal max = new BigDecimal("10.000");
            
            for (BigDecimal score : testCases) {
                boolean result = scoreService.validateScore(score);
                boolean expected = score.compareTo(min) >= 0 && score.compareTo(max) <= 0;
                assertEquals(expected, result, 
                    "Invariant violated for score: " + score);
            }
        }

        @Test
        @DisplayName("Invariant: validateScore(null) must always return false")
        void invariant_validateScore_nullAlwaysFalse() {
            for (int i = 0; i < 10; i++) {
                assertFalse(scoreService.validateScore(null));
            }
        }
    }

    // ========== Regression Testing ==========

    @Nested
    @DisplayName("Regression Testing")
    class RegressionTests {

        @Test
        @Tag("regression")
        @Tag("BUG-2024-001")
        @DisplayName("Regression: Boundary values 5.000 and 10.000 should be valid")
        void regression_validateScore_boundaryFix() {
            // Bug: Boundary values were incorrectly rejected
            assertTrue(scoreService.validateScore(new BigDecimal("5.000")),
                "Lower boundary 5.000 must be valid");
            assertTrue(scoreService.validateScore(new BigDecimal("10.000")),
                "Upper boundary 10.000 must be valid");
        }

        @Test
        @Tag("regression")
        @Tag("BUG-2024-002")
        @DisplayName("Regression: Null score should not throw NPE")
        void regression_validateScore_nullSafety() {
            // Bug: NullPointerException when score is null
            assertDoesNotThrow(() -> scoreService.validateScore(null));
            assertFalse(scoreService.validateScore(null));
        }
    }

    // ========== Fuzzing Tests ==========

    @Nested
    @DisplayName("Fuzzing Tests")
    class FuzzingTests {

        @ParameterizedTest
        @ValueSource(strings = {"0", "0.0", "0.00", "0.000"})
        @DisplayName("Fuzz: Zero values should be invalid")
        void fuzz_validateScore_zeroValues(String value) {
            assertFalse(scoreService.validateScore(new BigDecimal(value)));
        }

        @ParameterizedTest
        @ValueSource(strings = {"-0.001", "-1", "-100", "-999.999"})
        @DisplayName("Fuzz: Negative values should be invalid")
        void fuzz_validateScore_negativeValues(String value) {
            assertFalse(scoreService.validateScore(new BigDecimal(value)));
        }

        @ParameterizedTest
        @ValueSource(strings = {"100", "1000", "99999.999"})
        @DisplayName("Fuzz: Extremely large values should be invalid")
        void fuzz_validateScore_largeValues(String value) {
            assertFalse(scoreService.validateScore(new BigDecimal(value)));
        }

        @Test
        @DisplayName("Fuzz: High precision values should work correctly")
        void fuzz_validateScore_highPrecision() {
            // 5.0000000001 should be valid (rounds to 5.000)
            assertTrue(scoreService.validateScore(new BigDecimal("5.0000000001")));
            // 4.9999999999 should be invalid
            assertFalse(scoreService.validateScore(new BigDecimal("4.9999999999")));
        }
    }

    // ========== Contract Testing ==========

    @Nested
    @DisplayName("Contract Testing")
    class ContractTests {

        @Test
        @DisplayName("Contract: validateScore returns Boolean type")
        void contract_validateScore_returnTypeIsBoolean() {
            Object result = scoreService.validateScore(new BigDecimal("9.0"));
            assertInstanceOf(Boolean.class, result);
        }

        @Test
        @DisplayName("Contract: save with invalid score throws ServiceException")
        void contract_save_invalidScore_throwsServiceException() {
            MartialScore score = buildMartialScore(new BigDecimal("11.0"));
            when(judgeProjectService.hasPermission(anyLong(), anyLong())).thenReturn(true);
            
            Exception ex = assertThrows(Exception.class, () -> scoreService.save(score));
            assertInstanceOf(ServiceException.class, ex);
        }
    }

    // ========== Anomaly Detection Tests ==========

    @Nested
    @DisplayName("Anomaly Detection Tests")
    class AnomalyDetectionTests {

        @Test
        @Tag("regression")
        @DisplayName("Anomaly: Large deviation should log warning but not throw")
        void anomaly_largeDeviation_shouldLogWarning() {
            MartialScore e1 = buildMartialScore(new BigDecimal("9.0")); e1.setJudgeId(1L);
            MartialScore e2 = buildMartialScore(new BigDecimal("9.0")); e2.setJudgeId(2L);
            MartialScore e3 = buildMartialScore(new BigDecimal("9.0")); e3.setJudgeId(3L);
            
            doReturn(Arrays.asList(e1, e2, e3)).when(scoreService).list(any(QueryWrapper.class));
            
            MartialScore newScore = buildMartialScore(new BigDecimal("7.0"));
            newScore.setJudgeId(99L);
            
            assertDoesNotThrow(() -> scoreService.checkAnomalyScore(newScore));
        }
    }

    // ========== Helper Methods ==========

    static Stream<BigDecimal> randomValidScores() {
        Random random = new Random(42);
        return Stream.generate(() -> 
            new BigDecimal(5 + random.nextDouble() * 5).setScale(3, RoundingMode.HALF_UP)
        ).limit(50);
    }

    static Stream<BigDecimal> randomInvalidScores() {
        Random random = new Random(42);
        return Stream.concat(
            Stream.generate(() -> new BigDecimal(random.nextDouble() * 4.999).setScale(3, RoundingMode.HALF_UP)).limit(25),
            Stream.generate(() -> new BigDecimal(10.001 + random.nextDouble() * 10).setScale(3, RoundingMode.HALF_UP)).limit(25)
        );
    }

    private MartialScore buildMartialScore(BigDecimal score) {
        MartialScore s = new MartialScore();
        s.setId(1L);
        s.setCompetitionId(1L);
        s.setAthleteId(100L);
        s.setProjectId(10L);
        s.setJudgeId(5L);
        s.setJudgeName("Test Judge");
        s.setScore(score);
        s.setStatus(0);
        return s;
    }
}
