# syntax=docker/dockerfile:1
#######################################################################################
# Copyright ETSI Contributors and Others.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#######################################################################################


#######################
# Stage 1: Base stage#
#######################

FROM python:3.10-alpine AS base

ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_DISABLE_PIP_VERSION_CHECK=1

##############################################################################################################################################

#########################
# Stage 2: builder stage#
#########################

FROM base AS builder

# Install build dependencies
RUN apk add --no-cache \
    gcc \
    musl-dev \
    libffi-dev \
    openssl-dev \
    make \
    cmake \
    build-base \
    patch \
    curl \
    git \
    bash \
    libmagic

# Isolate dependencies in a venv
RUN python -m venv /app/osmclient/.venv
ENV PATH="/app/osmclient/.venv/bin:$PATH"

# Install OSM packages (assuming they provide source packages or wheels)
ARG IM_GERRIT_REFSPEC=master

RUN --mount=type=cache,target=/root/.cache/pip \
  git clone --filter=blob:none --tags https://osm.etsi.org/gerrit/osm/IM.git /tmp/osm-im && \
  cd /tmp/osm-im && \
  git fetch origin ${IM_GERRIT_REFSPEC} && \
  git checkout FETCH_HEAD && \
  cd - && \
  pip install --no-cache-dir -r /tmp/osm-im/requirements.txt && \
  pip install /tmp/osm-im

COPY . /tmp/osmclient/
RUN --mount=type=cache,target=/root/.cache/pip \
    cd /tmp/osmclient && \
    pip install --no-cache-dir -r /tmp/osmclient/requirements.txt && \
    pip install /tmp/osmclient && \
    cd -

#####################################################################################################################################################

#######################
# Stage 3: Final image#
#######################

FROM python:3.10-alpine AS final

# Install runtime dependencies
RUN apk add --no-cache \
    bash \
    libmagic

ENV VIRTUAL_ENV=/app/osmclient/.venv \
    PATH="/app/osmclient/.venv/bin:$PATH"

# Copy Python packages from build stage
COPY --from=builder --chown=appuser:appuser /app/osmclient/.venv /app/osmclient/.venv

# Copy OSM binaries
COPY --from=builder /app/osmclient/.venv/bin/osm /usr/local/bin/osm
COPY charm.sh /usr/sbin/charm

# Create app user
RUN addgroup -g 1000 appuser && \
    adduser -u 1000 -G appuser -D appuser && \
    mkdir -p /app/osmclient && \
    chown -R appuser:appuser /app

WORKDIR /app/osmclient

# Set environment variables
ENV LC_ALL=C.UTF-8i \
    LANG=C.UTF-8 \
    OSM_HOSTNAME=nbi:9999 \
    OSM_USER=admin \
    OSM_PASSWORD=admin \
    OSM_PROJECT=admin

# Switch to non-root user
USER appuser

CMD ["/usr/local/bin/osm"]