# ---- Stage 1: Build frontend ----
FROM mirror.gcr.io/library/node:22-alpine AS frontend-build
WORKDIR /app/frontend
COPY frontend/package.json frontend/package-lock.json ./
RUN npm ci
COPY frontend/ ./
RUN npx vite build

# ---- Stage 2: Build Go backend ----
FROM mirror.gcr.io/library/golang:1.26-alpine AS backend-build
WORKDIR /app/backend
COPY backend/go.mod backend/go.sum ./
RUN go mod download
COPY backend/ ./
RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /server ./cmd/server

# ---- Stage 3: Runtime ----
FROM mirror.gcr.io/library/alpine:3.21
RUN apk add --no-cache ca-certificates tzdata
WORKDIR /app

COPY --from=backend-build /server /app/server
COPY --from=frontend-build /app/frontend/dist /app/static
COPY data/ /app/data-seed/

EXPOSE 8080

ENV PORT=8080
ENV DATA_DIR=/app/data

# Copy seed data on first run if /app/data is empty (volume mount)
COPY <<'EOF' /app/entrypoint.sh
#!/bin/sh
if [ ! -f /app/data/tournaments.json ]; then
  echo "Seeding initial data..."
  cp -r /app/data-seed/* /app/data/
fi
exec /app/server -static /app/static -data /app/data
EOF
RUN chmod +x /app/entrypoint.sh

ENTRYPOINT ["/app/entrypoint.sh"]