# Serves the Flutter web build of "AC Control" as a plain static website.
#
# The image is self contained: it compiles the web bundle itself instead of
# expecting a prepared `build/web` directory, so
# `docker build -f ac_web/Dockerfile ac_web` produces exactly the same image
# locally as the gitea action does.

# ---------------------------------------------------------------- build stage
FROM debian:bookworm-slim AS build

# Keep the version in sync with `.gitea/workflows/*.yml`. The sdk is taken from
# the official archive instead of a prebuilt flutter image, because that archive
# has every released version and can therefore be pinned exactly.
ARG FLUTTER_VERSION=3.44.9

RUN apt-get update \
 && apt-get install -y --no-install-recommends ca-certificates curl git unzip xz-utils \
 && rm -rf /var/lib/apt/lists/*

RUN curl -fsSL "https://storage.googleapis.com/flutter_infra_release/releases/stable/linux/flutter_linux_${FLUTTER_VERSION}-stable.tar.xz" \
  | tar -xJ -C /opt

ENV PATH="/opt/flutter/bin:${PATH}"

# The flutter tool calls git on its own sdk during every command, and git
# refuses to work in a directory it considers to belong to somebody else.
RUN git config --global --add safe.directory /opt/flutter

WORKDIR /app

# The dependencies are copied on their own so that this layer is only rebuilt
# when they actually changed, not on every source change.
COPY pubspec.yaml pubspec.lock ./
RUN flutter pub get

COPY . .

# The result is a completely static bundle - the app talks to the AcAPI from
# the browser of the user, not from this container.
RUN flutter build web --release

# -------------------------------------------------------------- runtime stage
FROM nginx:alpine AS runtime

# The bundle is built with the backend address that is compiled into
# `lib/main.dart`, and the browser of the visitor resolves it - not this
# container. Serving this image to other machines therefore needs a host name
# in `main.dart` that those machines can reach as well.
COPY nginx.conf /etc/nginx/conf.d/default.conf
COPY --from=build /app/build/web /usr/share/nginx/html

EXPOSE 80