# syntax=docker/dockerfile:1

# ---- Build stage: compile and assemble a runnable distribution ----
FROM eclipse-temurin:25-jdk AS build
WORKDIR /app

# Copy the Gradle wrapper and build scripts first so dependency resolution is
# cached in its own layer and only re-runs when the build files change.
COPY gradlew settings.gradle.kts build.gradle.kts ./
COPY gradle ./gradle
RUN chmod +x gradlew && ./gradlew --no-daemon dependencies > /dev/null 2>&1 || true

# Now the source. `installDist` produces build/install/Botinator with a launcher
# script and all dependency jars under lib/.
COPY src ./src
RUN ./gradlew --no-daemon --stacktrace installDist

# ---- Runtime stage: JRE only, no build tooling ----
FROM eclipse-temurin:25-jre
WORKDIR /app

# Run as an unprivileged user.
RUN useradd --system --create-home --uid 10001 botinator
USER botinator

# The assembled app (bin/Botinator launcher + lib/*.jar).
COPY --from=build --chown=botinator:botinator /app/build/install/Botinator/ ./

# BOT_TOKEN etc. and the catchphrases file are supplied at deploy time
# (env_file / -e for config, a mounted volume for catchphrases.txt).
ENTRYPOINT ["./bin/Botinator"]