# Build stage
FROM golang:1.21-alpine AS builder

# Install git and ca-certificates (needed for fetching dependencies)
RUN apk add --no-cache git ca-certificates

# Set the working directory
WORKDIR /build

# Copy go mod files
COPY go.mod go.sum ./

# Download dependencies
RUN go mod download

# Copy source code
COPY contact-scrape.go ./

# Build the application
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o contact-scrape .

# Runtime stage
FROM alpine:latest

# Install ca-certificates for HTTPS requests
RUN apk --no-cache add ca-certificates tzdata

# Create non-root user
RUN addgroup -g 1001 -S appgroup && \
    adduser -u 1001 -S appuser -G appgroup

# Set working directory
WORKDIR /app

# Copy binary from builder stage
COPY --from=builder /build/contact-scrape .

# Copy HTML file
COPY index.html .

# Create data directory
RUN mkdir -p data && chown -R appuser:appgroup /app

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/ || exit 1

# Run the application
CMD ["./contact-scrape"]