# DanceLessonsCoach Docker Image
# Multi-stage build for production deployment

# Stage 1: Build binary
FROM golang:1.26.1-alpine AS builder

WORKDIR /app

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

# Copy source code
COPY . ./

# Install swag and generate Swagger docs only if they don't exist
RUN if [ ! -f pkg/server/docs/swagger.json ]; then \
    echo "📝 Generating Swagger documentation..." && \
    go install github.com/swaggo/swag/cmd/swag@latest && \
    cd pkg/server && go generate && \
    echo "✅ Swagger documentation generated"; \
    else \
    echo "✅ Swagger documentation already exists, skipping swag installation and generation"; \
    fi

# Build binary
RUN CGO_ENABLED=0 GOOS=linux go build -o /dance-lessons-coach ./cmd/server

# Stage 2: Final image
FROM alpine:3.18

WORKDIR /app

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

# Copy binary from builder
COPY --from=builder /dance-lessons-coach /app/dance-lessons-coach

# Copy configuration
COPY config.yaml /app/config.yaml

# Set permissions
RUN chmod +x /app/dance-lessons-coach

# Set timezone
ENV TZ=UTC

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s \
    CMD wget -q --spider http://localhost:8080/api/health || exit 1

# Entry point
ENTRYPOINT ["/app/dance-lessons-coach"]