# ═══════════════════════════════════════════════════════════
# 🐍 OPHION Agent - Dockerfile
# ═══════════════════════════════════════════════════════════

# Build stage
FROM golang:1.22-alpine AS builder

WORKDIR /build

# Install dependencies
RUN apk add --no-cache git ca-certificates

# Copy go modules first (cache layer)
COPY go.mod go.sum ./
RUN go mod download

# Copy source code
COPY cmd/ ./cmd/
COPY internal/ ./internal/

# Build the agent binary
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
    go build -ldflags="-s -w" -o ophion-agent ./cmd/agent

# Runtime stage
FROM alpine:3.19

LABEL org.opencontainers.image.title="OPHION Agent"
LABEL org.opencontainers.image.description="Observability Agent - Metrics, Logs, Traces Collector"

# Install runtime dependencies
RUN apk add --no-cache ca-certificates tzdata

# Create non-root user
RUN addgroup -g 1000 ophion && \
    adduser -u 1000 -G ophion -s /bin/sh -D ophion

WORKDIR /app

# Copy binary from builder
COPY --from=builder /build/ophion-agent /app/

USER ophion

# Environment defaults
ENV TZ=America/Sao_Paulo \
    OPHION_SERVER=http://localhost:8080 \
    OPHION_INTERVAL=30s \
    OPHION_DOCKER=true \
    OPHION_LOGS=true \
    OPHION_OTLP=true \
    OPHION_OTLP_PORT=4318

# OTLP receiver port
EXPOSE 4318

ENTRYPOINT ["/app/ophion-agent"]