FROM ubuntu:22.04

# 1. Install Tools
# 'p7zip-full' is REQUIRED to extract files from the ISO
RUN apt-get update && apt-get install -y \
    g++ make qemu-system-misc opensbi u-boot-qemu wget p7zip-full \
    && rm -rf /var/lib/apt/lists/*

# 2. Setup User
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user PATH=/home/user/.local/bin:$PATH
WORKDIR $HOME/app

# 3. DOWNLOAD & EXTRACT ALPINE V3.23 (FIXED)
# We use v3.23 because it is the first version with a Standard RISC-V ISO.
# We extract the 'LTS' kernel (vmlinuz-lts) and rename it to 'vmlinuz' for main.cpp
RUN wget https://dl-cdn.alpinelinux.org/alpine/v3.23/releases/riscv64/alpine-standard-3.23.0-riscv64.iso \
    && 7z x alpine-standard-3.23.0-riscv64.iso boot/vmlinuz-lts boot/initramfs-lts \
    && mv boot/vmlinuz-lts vmlinuz \
    && mv boot/initramfs-lts initramfs \
    && mv alpine-standard-3.23.0-riscv64.iso alpine.iso 

# 4. GET BIOS
# Copy OpenSBI firmware so QEMU finds it easily
RUN cp /usr/lib/riscv64-linux-gnu/opensbi/generic/fw_jump.elf bios.elf

# 5. COMPILE APP
COPY --chown=user main.cpp .
RUN g++ -O3 -pthread main.cpp -o ai_server

EXPOSE 7860
CMD ["./ai_server"]