# Multi-stage build for full-stack task manager
# This Dockerfile builds both backend and frontend

# ============== BACKEND BUILD ==============
FROM golang:1.22-alpine AS backend-builder

WORKDIR /app/backend

RUN apk add --no-cache git

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

COPY backend/ .
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .

# ============== FRONTEND BUILD ==============
FROM node:20-alpine AS frontend-deps
WORKDIR /app

COPY frontend/package.json frontend/package-lock.json* ./
RUN npm ci || npm install

FROM node:20-alpine AS frontend-builder
WORKDIR /app

COPY --from=frontend-deps /app/node_modules ./node_modules
COPY frontend/ .

ENV NEXT_TELEMETRY_DISABLED=1
RUN npm run build

# ============== FINAL STAGE ==============
FROM alpine:3.19

WORKDIR /app

# Install nginx, nodejs, and supervisor
RUN apk --no-cache add ca-certificates nginx nodejs npm supervisor

# Copy backend binary
COPY --from=backend-builder /app/backend/main ./backend/main

# Copy frontend
COPY --from=frontend-builder /app/.next/standalone ./frontend/
COPY --from=frontend-builder /app/.next/static ./frontend/.next/static
COPY --from=frontend-builder /app/public ./frontend/public

# Create nginx config for reverse proxy
RUN mkdir -p /etc/nginx/http.d
COPY <<EOF /etc/nginx/http.d/default.conf
server {
    listen 8080;

    location /api/ {
        proxy_pass http://127.0.0.1:8081/api/;
        proxy_http_version 1.1;
        proxy_set_header Host \$host;
        proxy_set_header X-Real-IP \$remote_addr;
    }

    location /health {
        proxy_pass http://127.0.0.1:8081/health;
    }

    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade \$http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host \$host;
        proxy_cache_bypass \$http_upgrade;
    }
}
EOF

# Create supervisord config
COPY <<EOF /etc/supervisord.conf
[supervisord]
nodaemon=true
logfile=/dev/null
logfile_maxbytes=0

[program:backend]
command=/app/backend/main
directory=/app/backend
environment=PORT=8081
autostart=true
autorestart=true
stdout_logfile=/dev/fd/1
stdout_logfile_maxbytes=0
stderr_logfile=/dev/fd/2
stderr_logfile_maxbytes=0

[program:frontend]
command=node /app/frontend/server.js
directory=/app/frontend
environment=PORT=3000,HOSTNAME=0.0.0.0,NODE_ENV=production
autostart=true
autorestart=true
stdout_logfile=/dev/fd/1
stdout_logfile_maxbytes=0
stderr_logfile=/dev/fd/2
stderr_logfile_maxbytes=0

[program:nginx]
command=nginx -g 'daemon off;'
autostart=true
autorestart=true
stdout_logfile=/dev/fd/1
stdout_logfile_maxbytes=0
stderr_logfile=/dev/fd/2
stderr_logfile_maxbytes=0
EOF

EXPOSE 8080

CMD ["supervisord", "-c", "/etc/supervisord.conf"]