FROM golang:1.21.4

# Set default build-time value, not persisted in the container
ARG DOCKER_ENV=production
# Set runtime environment variable inside the container
ENV DOCKER_ENV=${DOCKER_ENV}

WORKDIR /code

RUN echo "Building with DOCKER_ENV=${DOCKER_ENV}"

COPY go.mod go.sum ./
RUN go mod download

COPY . .
RUN go mod tidy && \
    if [ "$DOCKER_ENV" = "local" ]; then \
        echo "Local environment detected, installing Air..."; \
        go install github.com/cosmtrek/air@v1.49.0; \
    fi

CMD if [ "$DOCKER_ENV" = "local" ]; then \
        echo "Local environment detected, running Air..." && \
        air -c .air.toml; \
    else \
        echo "Production environment detected, building and running the web..."; \
        go build -o tmp/web ./cmd/web/main.go && ./tmp/web; \
    fi