# Dockerfile.podman - Optimized for Podman deployment
# HMAC File Server 3.2 "Tremora del Terra" - Podman Edition

FROM docker.io/golang:1.24-alpine AS builder

WORKDIR /build

# Install build dependencies
RUN apk add --no-cache git ca-certificates tzdata

# Copy source code
COPY go.mod go.sum ./
RUN go mod download

COPY . .

# Build static binary optimized for containers
RUN CGO_ENABLED=0 GOOS=linux go build \
    -ldflags="-w -s -extldflags '-static'" \
    -a -installsuffix cgo \
    -o hmac-file-server ./cmd/server/

# Production stage - Alpine for better compatibility and security
FROM alpine:latest

# Install runtime dependencies and create user
RUN apk add --no-cache \
    ca-certificates \
    tzdata \
    curl \
    shadow \
    iputils \
    && adduser -D -s /bin/sh -u 1011 appuser \
    && rm -rf /var/cache/apk/*

# Create application directories with proper ownership and secure permissions
RUN mkdir -p /app /data /deduplication /iso /logs /tmp && \
    chown -R appuser:appuser /app /data /deduplication /iso /logs /tmp && \
    chmod 750 /app /data /deduplication /iso /logs && \
    chmod 1777 /tmp

# Copy binary from builder stage
COPY --from=builder /build/hmac-file-server /app/hmac-file-server

# Set proper permissions on binary
RUN chmod +x /app/hmac-file-server && \
    chown appuser:appuser /app/hmac-file-server

# Switch to non-root user for security
USER appuser

# Set working directory
WORKDIR /app

# Add labels for better container management
LABEL org.opencontainers.image.title="HMAC File Server" \
      org.opencontainers.image.description="Secure file server with XEP-0363 support" \
      org.opencontainers.image.version="3.2" \
      org.opencontainers.image.vendor="PlusOne" \
      org.opencontainers.image.source="https://github.com/PlusOne/hmac-file-server" \
      org.opencontainers.image.licenses="MIT"

# Health check for container orchestration with network resilience awareness
HEALTHCHECK --interval=30s --timeout=15s --start-period=60s --retries=3 \
  CMD curl -f http://localhost:8888/health || exit 1

# Expose default port (configurable via config)
EXPOSE 8888

# Use exec form for proper signal handling
ENTRYPOINT ["/app/hmac-file-server"]
CMD ["-config", "/app/config.toml"]