ARG DEBIAN_VERSION=stable-slim
ARG YTDLP_REPO="yt-dlp/yt-dlp"

# Stage 1: Runtime
FROM debian:${DEBIAN_VERSION} AS base
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg python3 python3-pip curl ca-certificates unzip \
    && rm -rf /var/lib/apt/lists/*

# Install yt-dlp and its dependencies via pip so they share the SAME
# curl_cffi instance. The standalone release binary bundles its own older
# curl_cffi which lacks modern impersonation profiles like chrome131,
# safari18_0, firefox135, etc. Installing via pip ensures the same profile
# set is available to both the scrape step and yt-dlp.
RUN pip install --no-cache-dir --break-system-packages \
    "curl-cffi>=0.13.0" requests PySocks \
    "yt-dlp>=2025.1.1" \
    yt-dlp-get-pot bgutil-ytdlp-pot-provider

# Stage 2: Fetcher (Deno only — needed as JS runtime for yt-dlp)
FROM alpine:latest AS fetcher
ARG TARGETARCH
RUN apk add --no-cache curl unzip
ARG CACHE_BUST=1
RUN DETECTED_ARCH="${TARGETARCH:-$(uname -m)}" && \
    if [ "$DETECTED_ARCH" = "amd64" ] || [ "$DETECTED_ARCH" = "x86_64" ]; then \
        D_ARCH="x86_64"; \
    else \
        D_ARCH="aarch64"; \
    fi && \
    curl -fsSL "https://github.com/denoland/deno/releases/latest/download/deno-${D_ARCH}-unknown-linux-gnu.zip" -o /deno.zip && \
    unzip /deno.zip -d / && chmod a+rx /deno

# Stage 3: Final
FROM base AS final
COPY --from=fetcher /deno /usr/local/bin/deno
ENV XDG_CONFIG_HOME=/dev/shm/yt-dlp/config
ENV XDG_CACHE_HOME=/dev/shm/yt-dlp/cache