package com.nanri.aiimage.config;

import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.read.ListAppender;
import org.junit.jupiter.api.Test;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;

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

/**
 * task-190：日志脱敏契约（spec 11 §2）。
 * Token 部分脱敏规则单一来源（StructuredLog.maskToken，ImageVideo 已委托）；结构化字段值
 * 消毒防日志注入；重试守卫的 URL(去 query)/异常消息体不入日志，保证敏感原文不落盘。
 */
class LogRedactionTest {

    @Test
    void shortTokenFullyMasked() {
        assertEquals("***", StructuredLog.maskToken("abc123"));
    }

    @Test
    void longTokenPartiallyMaskedNoOriginal() {
        String original = "abcdefghij-ABCDEFGHIJ-secret-token-000";
        String masked = StructuredLog.maskToken(original);
        assertEquals(original.substring(0, 6) + "***" + original.substring(original.length() - 4), masked);
        assertFalse(masked.contains(original), "脱敏结果不应包含原始 token");
    }

    @Test
    void nullBlankTokenMaskedEmpty() {
        assertEquals("", StructuredLog.maskToken(null));
        assertEquals("", StructuredLog.maskToken("   "));
    }

    @Test
    void maskingDeterministic() {
        String token = "abcdefghijk-1234567890";
        assertEquals(StructuredLog.maskToken(token), StructuredLog.maskToken(token));
    }

    @Test
    void structuredFieldStripsNewlineNoLogInjection() {
        String value = StructuredLog.field("正常前缀\r\nInject: stolen; more");
        assertFalse(value.contains("\r"), "字段值不应含回车");
        assertFalse(value.contains("\n"), "字段值不应含换行，防止日志注入");
    }

    @Test
    void guardStripsTokenFromUrlQueryInLog() throws Exception {
        IdempotentRetryGuard guard = new IdempotentRetryGuard(fastProps());
        ListAppender<ILoggingEvent> captured = attach();
        try {
            AtomicInteger n = new AtomicInteger();
            guard.execute("POST", true, "brand", "http://example/x?token=SECRET-QUERY-999", () -> {
                if (n.incrementAndGet() < 2) {
                    throw new IOException("连接中断");
                }
                return "ok";
            });
            String text = join(captured);
            assertFalse(text.contains("SECRET-QUERY-999"), "URL query 中的 token 不应入日志: " + text);
        } finally {
            detach(captured);
        }
    }

    @Test
    void guardExceptionMessageNotLogged() throws Exception {
        IdempotentRetryGuard guard = new IdempotentRetryGuard(fastProps());
        ListAppender<ILoggingEvent> captured = attach();
        try {
            AtomicInteger n = new AtomicInteger();
            guard.execute("POST", true, "brand", "http://example/x", () -> {
                if (n.incrementAndGet() < 2) {
                    throw new IOException("响应: Bearer secret-token-abc-9999");
                }
                return "ok";
            });
            String text = join(captured);
            assertFalse(text.contains("secret-token-abc-9999"), "异常消息体不应入日志: " + text);
            assertFalse(text.contains("Bearer"), "鉴权字样不应入日志");
        } finally {
            detach(captured);
        }
    }

    @Test
    void normalFieldsKeptWhileSensitiveMasked() {
        // 普通字段原样保留；敏感字段走 maskToken 后不再含原文
        assertTrue(StructuredLog.format(Map.of("taskId", 7L)).contains("taskId=7"), "普通字段应保留");
        String token = "normal-token-value-1234567890";
        assertFalse(StructuredLog.maskToken(token).equals(token), "maskToken 不应原样返回 token");
    }

    private static HttpClientProperties fastProps() {
        HttpClientProperties p = new HttpClientProperties();
        p.setBaseRetryDelayMillis(1);
        return p;
    }

    private static ListAppender<ILoggingEvent> attach() {
        Logger guardLogger = (Logger) LoggerFactory.getLogger(IdempotentRetryGuard.class);
        ListAppender<ILoggingEvent> appender = new ListAppender<>();
        appender.start();
        guardLogger.addAppender(appender);
        return appender;
    }

    private static void detach(ListAppender<ILoggingEvent> appender) {
        ((Logger) LoggerFactory.getLogger(IdempotentRetryGuard.class)).detachAppender(appender);
    }

    private static String join(ListAppender<ILoggingEvent> appender) {
        return String.join("\n", appender.list.stream().map(ILoggingEvent::getFormattedMessage).toList());
    }
}