# Multi-stage build for production
# Stage 1: Build stage - compile Java sources
FROM dockerhub.wace.me/tomcat:7.0.94-jre7-alpine.linux AS builder

# Install JDK for compilation (JRE image doesn't have javac)
RUN apk add --no-cache openjdk7

# Set working directory
WORKDIR /build

# Copy source code and libraries
COPY src ./src
COPY WebContent ./WebContent

# Create classes directory
RUN mkdir -p WebContent/WEB-INF/classes

# Compile Java sources (include Tomcat servlet API in classpath)
RUN find src -name "*.java" -print0 | xargs -0 javac \
    -encoding UTF-8 \
    -source 1.7 \
    -target 1.7 \
    -d WebContent/WEB-INF/classes \
    -cp "WebContent/WEB-INF/lib/*:/usr/local/tomcat/lib/*" \
    -Xlint:-options \
    -Xlint:-deprecation \
    -Xlint:-unchecked

# Copy resources (XML, properties files)
RUN find src -type f \( -name "*.xml" -o -name "*.properties" \) | while read -r filepath; do \
    relative_path="${filepath#src/}"; \
    target_file="WebContent/WEB-INF/classes/$relative_path"; \
    mkdir -p "$(dirname "$target_file")"; \
    cp "$filepath" "$target_file"; \
    done

# Verify compilation
RUN CLASS_COUNT=$(find WebContent/WEB-INF/classes -name "*.class" | wc -l); \
    if [ $CLASS_COUNT -eq 0 ]; then \
        echo "ERROR: No Java classes were compiled!"; \
        exit 1; \
    else \
        echo "Successfully compiled $CLASS_COUNT Java classes"; \
    fi

# Stage 2: Runtime stage
FROM dockerhub.wace.me/tomcat:7.0.94-jre7-alpine.linux AS production

# Install fonts for POI Excel generation
RUN apk add --no-cache fontconfig ttf-dejavu

# Remove default webapps
RUN rm -rf /usr/local/tomcat/webapps/*

# Copy compiled application from builder stage
COPY --from=builder /build/WebContent /usr/local/tomcat/webapps/ROOT

# Copy source for reference (optional)
COPY src /usr/local/tomcat/webapps/ROOT/WEB-INF/src

# Copy custom Tomcat context configuration for JNDI
COPY ./tomcat-conf/context.xml /usr/local/tomcat/conf/context.xml

# Configure Tomcat Connector for UTF-8 URI encoding
RUN sed -i 's/<Connector port="8080"/<Connector port="8080" URIEncoding="UTF-8"/g' /usr/local/tomcat/conf/server.xml

# Expose Tomcat port
EXPOSE 8080

# Start Tomcat
CMD ["catalina.sh", "run"]