FROM golang:1.24-bookworm AS base

RUN apt-get update
RUN apt-get install -y libssl-dev cmake build-essential gperf libz-dev make git php libsignal-protocol-c-dev

FROM base AS tdlib

ARG TD_COMMIT
ARG MAKEOPTS
RUN git clone https://github.com/tdlib/td /src/
RUN git -C /src/ checkout "${TD_COMMIT}"
RUN mkdir build
WORKDIR /build/
RUN cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/compiled/ /src/
RUN cmake --build . --target prepare_cross_compiling ${MAKEOPTS}
WORKDIR /src/
RUN php SplitSource.php
WORKDIR /build/
RUN cmake --build . ${MAKEOPTS}
RUN make install

FROM base AS ntgcalls-build
ARG MAKEOPTS
# CMake >= 3.27 required; bookworm ships 3.25
ARG CMAKE_VERSION=3.31.6
RUN curl -fsSL https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-linux-$(uname -m).tar.gz \
    | tar xz -C /usr/local --strip-components=1
RUN apt-get install -y libasound2-dev libpulse-dev
# Note: ntgcalls submodule must be initialized on host before docker build
RUN --mount=type=bind,source=./ntgcalls,target=/ntgcalls-src,rw \
    mkdir -p /ntgcalls-build && cd /ntgcalls-build && \
    cmake -DCMAKE_BUILD_TYPE=Release \
        -DCMAKE_TOOLCHAIN_FILE=/ntgcalls-src/cmake/Toolchain.cmake \
        -DPython_EXECUTABLE=$(which python3) \
        -DSTATIC_BUILD=ON \
        /ntgcalls-src/ && \
    cmake --build . ${MAKEOPTS} && \
    cp -r /ntgcalls-src/static-output /ntgcalls-output

FROM base AS cache
ARG VERSION
COPY --from=tdlib /compiled/ /usr/local/
COPY --from=ntgcalls-build /ntgcalls-output/lib/libntgcalls.a /usr/local/lib/
COPY --from=ntgcalls-build /ntgcalls-output/include/ /usr/local/include/
RUN --mount=type=bind,source=./docker/resolv_shim.c,target=/tmp/resolv_shim.c \
    gcc -c -o /tmp/resolv_shim.o /tmp/resolv_shim.c && \
    ar rcs /usr/local/lib/libresolv_shim.a /tmp/resolv_shim.o
WORKDIR /src
RUN go env -w GOCACHE=/go-cache
RUN go env -w GOMODCACHE=/gomod-cache
# Note: submodules must be initialized on host before docker build (bind mount)
RUN --mount=type=cache,target=/gomod-cache \
    --mount=type=bind,source=./,target=/src,rw \
    /bin/bash -c 'go mod tidy; go get'

FROM cache AS build
ARG MAKEOPTS
ENV CGO_ENABLED=1
ENV CGO_CFLAGS="-I/usr/local/include"
ENV CGO_LDFLAGS="-L/usr/local/lib -lntgcalls -lresolv_shim -lstdc++ -lm -ldl -lrt -lpthread -lz -lresolv"
WORKDIR /src
# Bullseye only has the pre-fork libsignal-protocol-c packaged (libomemo-c
# is bookworm+) - GOTAGS=signal_legacy builds telegabber's OMEMO bindings
# against it, which only supports legacy/siacs OMEMO, not modern OMEMO 1/2.
RUN --mount=type=bind,source=./,target=/src,rw \
    --mount=type=cache,target=/go-cache \
    --mount=type=cache,target=/gomod-cache \
    --mount=type=cache,destination=/src/release \
    make ${MAKEOPTS} GOTAGS=signal_legacy

FROM build AS release
RUN --mount=type=cache,destination=/src/release \
    cp /src/release/telegabber /

FROM scratch AS binaries
COPY --from=release /telegabber /