# ================================
# Asset image
# ================================
FROM node:22-alpine AS assets

ARG ESBUILD_VERSION=0.28.1
ARG OXIPNG_VERSION=9.1.5
ARG SVGO_VERSION=4.0.2

# Install the minifiers in their own layer, so they are cached across asset changes.
# The oxipng pin is fuzzy (=~) so Alpine package revision bumps (-r0, -r1, ...) do not break the build when the base
# image advances.
RUN apk add --no-cache "oxipng=~${OXIPNG_VERSION}" \
    && npm install --global "esbuild@${ESBUILD_VERSION}" "svgo@${SVGO_VERSION}"

# Copy the static files and minify the JS/CSS/SVG sources and losslessly recompress the PNG images in place, keeping
# their names so the URL paths derived from the StaticFile enumeration stay unchanged.
WORKDIR /static
COPY ./Services/Website/Resources/Static .
RUN esbuild --minify --allow-overwrite --outdir=css css/*.css \
    && esbuild --minify --allow-overwrite --outdir=js js/*.js \
    && oxipng --opt max --strip safe --recursive . \
    && svgo --recursive --folder .

# Export stage: `docker build --target assets-export --output <dir>` writes the minified static files to <dir> for
# local inspection.
FROM scratch AS assets-export
COPY --from=assets /static /

# ================================
# Build image
# ================================
FROM swift:6.3-noble AS build

# Install OS updates
RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true \
    && apt-get -q update \
    && apt-get -q dist-upgrade -y \
    && apt-get install -y libjemalloc-dev \
    && rm -rf /var/lib/apt/lists/*

# Set up a build area
WORKDIR /build

# First just resolve dependencies.
# This creates a cached layer that can be reused as long as the manifests do not change. The Website package depends on
# the local Localization package via a relative path, so its manifest must be present for resolution to succeed.
COPY ./Packages/Localization/Package.swift ./Packages/Localization/
COPY ./Packages/Persistence/Package.swift ./Packages/Persistence/
COPY ./Packages/Infrastructure/Package.swift ./Packages/Infrastructure/
COPY ./Packages/Utility/Package.swift ./Packages/Utility/
COPY ./Services/Website/Package.swift ./Services/Website/Package.resolved ./Services/Website/
RUN swift package --package-path ./Services/Website resolve

# Copy only the Swift inputs needed for a release build. Static assets are built in the assets stage and copied into
# staging after the binary is produced.
COPY ./Packages/Infrastructure/Sources ./Packages/Infrastructure/Sources
COPY ./Packages/Localization/Sources ./Packages/Localization/Sources
COPY ./Packages/Persistence/Sources ./Packages/Persistence/Sources
COPY ./Packages/Utility/Sources ./Packages/Utility/Sources
COPY ./Services/Website/Sources ./Services/Website/Sources
COPY ./Services/Website/Tests ./Services/Website/Tests

# Build the application, with optimizations, with static linking, and using jemalloc
RUN swift build --package-path ./Services/Website -c release \
    --product "Website" \
    --static-swift-stdlib \
    -Xlinker -ljemalloc

# Switch to the staging area
WORKDIR /staging

# Copy main executable to staging area
RUN cp "$(swift build --package-path /build/Services/Website -c release --show-bin-path)/Website" ./

# Copy static swift backtracer binary to staging area
RUN cp "/usr/libexec/swift/linux/swift-backtrace-static" ./

# Copy resources bundled by SPM to staging area
RUN find -L "$(swift build --package-path /build/Services/Website -c release --show-bin-path)/" -regex '.*\.resources$' -exec cp -Ra {} ./ \;

# Create the static files directory (served by FileMiddleware) and fill it with the minified copies from the assets stage
RUN mkdir -p ./Resources/Static
COPY --from=assets /static ./Resources/Static

# Ensure that by default, neither the directory nor any of its contents are writable.
RUN chmod -R a-w ./Resources

# ================================
# Run image
# ================================
FROM ubuntu:noble

# Make sure all system packages are up to date, and install only essential packages.
RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true \
    && apt-get -q update \
    && apt-get -q dist-upgrade -y \
    && apt-get -q install -y \
      libjemalloc2 \
      ca-certificates \
      curl \
      tzdata \
# If your app or its dependencies import FoundationNetworking, also install `libcurl4`.
      # libcurl4 \
# If your app or its dependencies import FoundationXML, also install `libxml2`.
      # libxml2 \
    && rm -r /var/lib/apt/lists/*

# Create a hummingbird user and group with /app as its home directory
RUN useradd --user-group --create-home --system --skel /dev/null --home-dir /app hummingbird

# Switch to the new home directory
WORKDIR /app

# Copy built executable and any staged resources from builder
COPY --from=build --chown=hummingbird:hummingbird /staging /app

# Provide configuration needed by the built-in crash reporter and some sensible default behaviors.
ENV SWIFT_BACKTRACE=enable=yes,sanitize=yes,threads=all,images=all,interactive=no,swift-backtrace=./swift-backtrace-static

# Ensure all further commands run as the hummingbird user
USER hummingbird:hummingbird

# Let Docker bind to port 8080
EXPOSE 8080

# Start the Hummingbird service when the image is run, default to listening on 8080 in production environment
ENTRYPOINT ["./Website"]
CMD ["--http-host", "0.0.0.0", "--http-port", "8080"]