# Dragonix Foodmart — modern architecture.
#
#            ┌─────────── Caddy (LB + auto-HTTPS + gzip) ───────────┐
#   client ──▶  round-robins FastCGI across two PHP-8 app nodes      │
#            └──────────────┬───────────────────┬───────────────────┘
#                        app1 (app-1)        app2 (app-2)
#                           │  writes ▲          │
#                    reads ▼          │ writes   ▼ reads
#                   db-replica ◀──repl── db-primary        redis (cache + sessions)
#
name: foodmart

services:
  # ---- Load balancer / TLS / static / FastCGI round-robin ----
  caddy:
    image: caddy:2-alpine
    restart: unless-stopped
    ports:
      - "80:80"
      - "443:443"
    environment:
      DOMAIN: ${DOMAIN:-localhost}
    volumes:
      - ./Caddyfile:/etc/caddy/Caddyfile:ro
      - ../Dragonix_Foodmart:/var/www/html:ro   # serve static assets + route .php
      - caddy_data:/data
      - caddy_config:/config
    depends_on: [app1, app2]

  # ---- Two identical PHP-FPM app nodes (the load-balanced "webheads") ----
  app1:
    build: { context: .., dockerfile: deploy/app.Dockerfile }
    restart: unless-stopped
    environment: &app_env
      APP_NODE: app-1
      DB_WRITE_HOST: db-primary
      DB_READ_HOST: db-replica
      DB_NAME: cart
      DB_USER: foodmart
      DB_PASS: ${DB_APP_PASSWORD:-foodmart}
      REDIS_HOST: redis
      REDIS_PORT: "6379"
    volumes:
      - ../Dragonix_Foodmart:/var/www/html
    depends_on:
      db-primary: { condition: service_healthy }
      redis: { condition: service_started }

  app2:
    build: { context: .., dockerfile: deploy/app.Dockerfile }
    restart: unless-stopped
    environment:
      <<: *app_env
      APP_NODE: app-2
    volumes:
      - ../Dragonix_Foodmart:/var/www/html
    depends_on:
      db-primary: { condition: service_healthy }
      redis: { condition: service_started }

  # ---- MySQL primary (writes) ----
  db-primary:
    image: mysql:8.4
    restart: unless-stopped
    command: --server-id=1 --log-bin=mysql-bin --gtid-mode=ON --enforce-gtid-consistency=ON --binlog-format=ROW
    environment:
      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD:-rootpw}
      MYSQL_DATABASE: cart
      MYSQL_USER: foodmart
      MYSQL_PASSWORD: ${DB_APP_PASSWORD:-foodmart}
    volumes:
      - db_primary_data:/var/lib/mysql
      - ../sql/cart.sql:/docker-entrypoint-initdb.d/10-schema.sql:ro
      - ./mysql/primary-init.sql:/docker-entrypoint-initdb.d/20-replication.sql:ro
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-uroot", "-p${DB_ROOT_PASSWORD:-rootpw}"]
      interval: 5s
      timeout: 5s
      retries: 20

  # ---- MySQL replica (reads) — replicates from the primary via GTID ----
  db-replica:
    image: mysql:8.4
    restart: unless-stopped
    command: --server-id=2 --gtid-mode=ON --enforce-gtid-consistency=ON --read-only=ON
    environment:
      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD:-rootpw}
      MYSQL_ROOT_HOST: "%"   # allow the setup sidecar to connect over the network
    volumes:
      - db_replica_data:/var/lib/mysql
    depends_on:
      db-primary: { condition: service_healthy }
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-uroot", "-p${DB_ROOT_PASSWORD:-rootpw}"]
      interval: 5s
      timeout: 5s
      retries: 20

  # ---- One-shot: point the replica at the primary once both are healthy ----
  # (initdb.d can't do this — its temporary server has networking disabled.)
  replica-setup:
    image: mysql:8.4
    restart: "no"
    environment:
      DB_ROOT_PASSWORD: ${DB_ROOT_PASSWORD:-rootpw}
      DB_APP_PASSWORD: ${DB_APP_PASSWORD:-foodmart}
    volumes:
      - ./mysql/setup-replica.sh:/setup-replica.sh:ro
    entrypoint: ["sh", "/setup-replica.sh"]
    depends_on:
      db-primary: { condition: service_healthy }
      db-replica: { condition: service_healthy }

  # ---- Redis: query/object cache + PHP sessions ----
  redis:
    image: redis:7-alpine
    restart: unless-stopped
    command: ["redis-server", "--save", "", "--maxmemory", "128mb", "--maxmemory-policy", "allkeys-lru"]

volumes:
  db_primary_data:
  db_replica_data:
  caddy_data:
  caddy_config: