# 1단계: OTEL Java 에이전트 다운로드
FROM alpine:3.20 AS otel
ARG OTEL_VERSION=2.21.0

RUN apk add --no-cache curl && \
    curl -fL \
      https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v${OTEL_VERSION}/opentelemetry-javaagent.jar \
      -o /opentelemetry-javaagent.jar

# 2단계: Tomcat + JDK 8 이미지
FROM tomcat:9.0-jdk8-temurin

ENV TZ=Asia/Seoul \
    OTEL_SERVICE_NAME=helpdesk_service \
    OTEL_EXPORTER_OTLP_ENDPOINT=http://192.168.100.203:4317 \
    OTEL_EXPORTER_OTLP_PROTOCOL=grpc \
    OTEL_RESOURCE_ATTRIBUTES="deployment.environment=prod" \
    JAVA_TOOL_OPTIONS="-javaagent:/opt/opentelemetry-javaagent.jar"

# 타임존 적용
RUN ln -sf /usr/share/zoneinfo/Asia/Seoul /etc/localtime

# OTEL 에이전트 복사
COPY --from=otel /opentelemetry-javaagent.jar /opt/opentelemetry-javaagent.jar

# 톰캣 기본 웹앱 제거 + 필요한 디렉터리 선 생성
RUN rm -rf /usr/local/tomcat/webapps/* && \
    mkdir -p /usr/local/tomcat/webapps/ROOT && \
    mkdir -p /usr/local/tomcat/conf/Catalina/localhost

# Maven 빌드 결과 WAR를 임시 위치에 복사
COPY target/sayit-helpdesk.war /tmp/sayit-helpdesk.war

# WAR를 ROOT 디렉터리로 풀어서 배포
RUN cd /usr/local/tomcat/webapps/ROOT && \
    "$JAVA_HOME/bin/jar" xf /tmp/sayit-helpdesk.war && \
    rm /tmp/sayit-helpdesk.war

# Tomcat 디렉토리 소유권을 UID/GID 1000:1000 으로 변경
RUN chown -R 1000:1000 /usr/local/tomcat

# 컨테이너 실행 계정: UID 1000 / GID 1000
USER 1000:1000

EXPOSE 8080
CMD ["catalina.sh", "run"]