# EventSnap EVENT SIMULATION stack — models the real production box, not CI.
#
# Difference from docker-compose.test.yml (which is tuned for fast, unconstrained
# Playwright runs): this file reproduces the CX22 the event actually runs on —
#   * 2 vCPU total, shared by all four services
#   * 4 GB RAM, split by the same per-service limits production ships
#   * a REAL 30 GB filesystem for media + exports (loopback ext4), so statvfs
#     inside the container returns true numbers and the disk gate / 507 path is
#     exercised for real rather than simulated.
#
# Why cpuset on every service: production's per-service `cpus` ceilings sum to
# 1.5 + 1.2 + 0.6 + 0.5 = 3.8 on a box that has 2. That oversubscription is the
# point — the ceilings only bind when something else is competing, and cpu_shares
# decides who wins. Reproducing that on a 12-core workstation requires confining
# every container to the SAME two cores; without cpuset each service would get its
# ceiling simultaneously and the contention under test would never happen.
#
# Bring up:   docker compose -f docker-compose.sim.yml up -d --build
# Tear down:  docker compose -f docker-compose.sim.yml down -v
#
# The 30 GB volume is created out-of-band (see e2e/loadtest/sim-disk.sh) because a
# loopback device must be attached by root; it is declared `external` here.

x-cpuset: &cpuset '0,1'

services:
  db:
    image: postgres:16-alpine
    cpuset: *cpuset
    environment:
      POSTGRES_USER: eventsnap_test
      POSTGRES_PASSWORD: eventsnap_test
      POSTGRES_DB: eventsnap_test
    healthcheck:
      test: ['CMD-SHELL', 'pg_isready -U eventsnap_test -d eventsnap_test']
      interval: 3s
      timeout: 3s
      retries: 30
    ports:
      - '55433:5432'
    volumes:
      # Named (not anonymous) so a `down -v` really wipes it and so its on-disk size
      # can be measured against the 10 GB DISK_RESERVE that is meant to cover it.
      - sim_pgdata:/var/lib/postgresql/data
    # Production values, verbatim (docker-compose.yml db service).
    deploy:
      resources:
        limits:
          memory: 1G
          cpus: '1.5'
        reservations:
          memory: 256M
    cpu_shares: 2048
    memswap_limit: 1152m

  app:
    # The SHIPPED release image, not a local build. Verified identical to HEAD:
    # `git diff v0.17.5 HEAD -- backend/` is empty, and v0.17.5/v0.17.6 share one
    # app digest on purpose (the v0.17.6 bump was frontend-only). Running the real
    # artifact means the simulation tests what the event will actually run.
    image: ${SIM_APP_IMAGE:-registry.mc02.dev/eventsnap/app:v0.17.5}
    cpuset: *cpuset
    depends_on:
      db:
        condition: service_healthy
    environment:
      DATABASE_URL: postgres://eventsnap_test:eventsnap_test@db:5432/eventsnap_test
      JWT_SECRET: 00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff
      # bcrypt("admin-test-pw"), cost 4. $ doubled to escape compose interpolation.
      ADMIN_PASSWORD_HASH: $$2b$$04$$XKJJkNX6BOi6y3S42DA5JOWwk4oxc8DHPL6.MrPfJI2vpnccZjP32
      EVENT_SLUG: sim-wedding
      EVENT_NAME: Hochzeit Simulation
      APP_PORT: '3000'
      # Both live on the SAME 30 GB filesystem, as they do on the real VPS — but in
      # sibling directories, because config.rs::validate requires EXPORT_PATH outside
      # MEDIA_PATH (a keepsake archive contains every photo in the event).
      MEDIA_PATH: /disk/media
      EXPORT_PATH: /disk/exports
      SESSION_EXPIRY_DAYS: '30'
      # Production pins these; the CI stack leaves them at code defaults. Sized to 2 vCPU.
      DATABASE_MAX_CONNECTIONS: '15'
      COMPRESSION_WORKER_CONCURRENCY: '2'
      # Production disables comments for this event (docker-compose.yml, product decision).
      COMMENTS_ENABLED: 'false'
      # Mirrors the deployed setting so the harness can audit against the real gate.
      KEEPSAKE_ENABLED: ${SIM_KEEPSAKE:-true}
      # The ONE deviation from production: enables /admin/__truncate so the harness can
      # reset between runs. Never set on the real box.
      EVENTSNAP_TEST_MODE: '1'
      RUST_LOG: eventsnap_backend=info,tower_http=warn
    volumes:
      - sim_disk:/disk
    deploy:
      resources:
        limits:
          memory: 1G
          cpus: '1.2'
        reservations:
          memory: 256M
    cpu_shares: 512
    memswap_limit: 1152m
    expose:
      - '3000'

  frontend:
    # Shipped release image; `git diff v0.17.6 HEAD -- frontend/` is empty.
    image: ${SIM_FE_IMAGE:-registry.mc02.dev/eventsnap/frontend:v0.17.6}
    cpuset: *cpuset
    depends_on:
      - app
    environment:
      PORT: '3001'
      HOST: '0.0.0.0'
      ORIGIN: 'http://localhost:3102'
      PUBLIC_CAMERA_ENABLED: ${SIM_CAMERA:-true}
    deploy:
      resources:
        limits:
          memory: 256M
          cpus: '0.6'
    cpu_shares: 256
    memswap_limit: 320m
    expose:
      - '3001'

  caddy:
    image: caddy:2-alpine
    cpuset: *cpuset
    depends_on:
      - app
      - frontend
    volumes:
      - ./Caddyfile.sim:/etc/caddy/Caddyfile:ro
    deploy:
      resources:
        limits:
          memory: 256M
          cpus: '0.5'
    cpu_shares: 1024
    memswap_limit: 320m
    ports:
      - '3102:3102'

volumes:
  # 30 GB loopback ext4, created by e2e/loadtest/sim-disk.sh. Holds media AND exports,
  # exactly as one VPS disk holds both.
  sim_disk:
    external: true
    name: eventsnap_sim_media
  # Postgres data stays on the host disk, NOT on the 30 GB volume. Scoping decision:
  # the 30 GB budget under test is the one the APP manages and measures (statvfs on
  # MEDIA_PATH drives the disk gate). Putting PG on the same volume would test
  # filesystem exhaustion instead, and a full disk under Postgres risks ending the run
  # for an infrastructural reason rather than an application one. Its growth is sampled
  # separately and reported against DISK_RESERVE_BYTES (10 GB), which exists to cover it.
  sim_pgdata: