# Dockerfile for benchmark runner
FROM golang:1.25-alpine AS builder

# Install build dependencies including libsecp256k1 build requirements
RUN apk add --no-cache git ca-certificates gcc musl-dev autoconf automake libtool make

# Build libsecp256k1 EARLY - this layer will be cached unless secp256k1 version changes
# Using specific version tag and parallel builds for faster compilation
RUN cd /tmp && \
    git clone https://github.com/bitcoin-core/secp256k1.git && \
    cd secp256k1 && \
    git checkout v0.6.0 && \
    git submodule init && \
    git submodule update && \
    ./autogen.sh && \
    ./configure --enable-module-recovery --enable-module-ecdh --enable-module-schnorrsig --enable-module-extrakeys && \
    make -j$(nproc) && \
    make install && \
    cd /tmp && rm -rf secp256k1

# Set working directory
WORKDIR /build

# Copy go modules
COPY go.mod go.sum ./
RUN go mod download

# Copy source code
COPY . .

# Build the benchmark tool with CGO enabled
RUN CGO_ENABLED=1 GOOS=linux go build -a -o benchmark ./cmd/benchmark

# Copy libsecp256k1.so if available
RUN if [ -f pkg/crypto/p8k/libsecp256k1.so ]; then \
        cp pkg/crypto/p8k/libsecp256k1.so /build/; \
    fi

# Final stage
FROM alpine:latest

# Install runtime dependencies including libsecp256k1
RUN apk --no-cache add ca-certificates curl wget libsecp256k1

WORKDIR /app

# Copy benchmark binary
COPY --from=builder /build/benchmark /app/benchmark

# libsecp256k1 is already installed system-wide via apk

# Copy benchmark runner script
COPY cmd/benchmark/benchmark-runner.sh /app/benchmark-runner

# Make scripts executable
RUN chmod +x /app/benchmark-runner

# Create runtime user and reports directory owned by uid 1000
RUN adduser -u 1000 -D appuser && \
    mkdir -p /reports && \
    chown -R 1000:1000 /app /reports

# Set library path
ENV LD_LIBRARY_PATH=/app:/usr/local/lib:/usr/lib

# Environment variables
ENV BENCHMARK_EVENTS=50000
ENV BENCHMARK_WORKERS=24
ENV BENCHMARK_DURATION=60s

# Drop privileges: run as uid 1000
USER 1000:1000

# Run the benchmark runner
CMD ["/app/benchmark-runner"]