# Pad — local production setup with PostgreSQL + Redis
# Usage:
#   1. cp .env.example .env            # generates a POSTGRES_PASSWORD if missing
#   2. docker compose up -d
#
# Starts Pad with PostgreSQL for storage and Redis for real-time events,
# notifications, and the shared session-presence registry.
# The web UI binds to 127.0.0.1:7777 on the host by default — LAN/internet
# access requires explicit opt-in (see PAD_BIND_ADDR below or the prod override).
# First-time setup: visit the UI or run `pad auth setup` from a local CLI.

services:
  pad:
    build:
      context: .
      dockerfile: Dockerfile
    ports:
      # Bind to loopback only by default. A fresh install exposes the bootstrap
      # endpoint until the first admin is created, so defaulting to 0.0.0.0
      # would hand control of the instance to anyone who can route to the host.
      # Override by setting PAD_BIND_ADDR=0.0.0.0 (or a specific LAN IP) in .env.
      - "${PAD_BIND_ADDR:-127.0.0.1}:7777:7777"
    environment:
      # Container UID/GID for the pad process. Default to 1000/1000 for
      # backward compat with existing compose deploys whose volumes were
      # created under the previous USER pad (uid 1000) image. Override to
      # match your host volume's ownership if different.
      #
      # ${VAR-default} (no colon), not ${VAR:-default}. Compose follows
      # shell-like semantics — colon form would silently convert PUID=
      # or PGID= in .env to 1000, masking operator typos. Colon-less lets
      # explicit-empty values reach the entrypoint, which rejects them
      # with a clear error (matches docker-entrypoint.sh's own
      # ${VAR-99} convention).
      PUID: "${PUID-1000}"
      PGID: "${PGID-1000}"
      PAD_HOST: "0.0.0.0"
      PAD_PORT: "7777"
      PAD_DB_DRIVER: "postgres"
      # POSTGRES_PASSWORD is REQUIRED — docker compose refuses to start when unset.
      # Use libpq's keyword=value DSN (not the URI form) so passwords with
      # reserved URI characters like '/', '+', ':', '@' — common in
      # `openssl rand -base64` output — don't need percent-encoding and
      # can't break the connection string by accident.
      PAD_DATABASE_URL: "host=postgres port=5432 user=pad password=${POSTGRES_PASSWORD:?POSTGRES_PASSWORD is required — see .env.example} dbname=pad sslmode=disable"
      # PAD_ENCRYPTION_KEY is REQUIRED on Postgres — Pad won't auto-generate
      # one because a multi-replica deploy would generate a different key
      # per replica and fail cross-instance decryption. Generate with
      # `openssl rand -hex 32` and keep it stable across restarts.
      PAD_ENCRYPTION_KEY: "${PAD_ENCRYPTION_KEY:?PAD_ENCRYPTION_KEY is required — see .env.example}"
      PAD_REDIS_URL: "redis://redis:6379"
      PAD_DATA_DIR: "/data"
      PAD_LOG_LEVEL: "info"
      # Cloud-mode wiring — safe to keep enabled on self-host deploys
      # because every var defaults to empty and pad treats empty as
      # "not in cloud mode". Populate from .env when co-deploying with
      # pad-cloud so the reverse sidecar can cascade Stripe cancels on
      # account delete (TASK-690).
      PAD_CLOUD: "${PAD_CLOUD:-}"
      PAD_CLOUD_SECRET: "${PAD_CLOUD_SECRET:-}"
      PAD_CLOUD_SIDECAR_URL: "${PAD_CLOUD_SIDECAR_URL:-}"
      PAD_CLOUD_OUTBOUND_SECRET: "${PAD_CLOUD_OUTBOUND_SECRET:-}"
    volumes:
      - pad-data:/data
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
    restart: unless-stopped
    healthcheck:
      # Conditional: root → su-exec to pad; non-root → direct wget.
      # Mirrors the Dockerfile HEALTHCHECK so `docker run --user 1234`
      # pass-through still reports healthy.
      #
      # NOTE: $$(id -u), not $(id -u) — Compose performs $-interpolation
      # on YAML strings BEFORE the value reaches the container. Single
      # `$` would be parsed as a Compose variable reference; `$$` escapes
      # to a literal `$` so the shell inside the container sees `$(id -u)`.
      test: ["CMD-SHELL", "if [ \"$$(id -u)\" = \"0\" ]; then exec su-exec pad wget -q --spider http://localhost:7777/api/v1/health; fi; exec wget -q --spider http://localhost:7777/api/v1/health"]
      interval: 10s
      timeout: 5s
      retries: 3
      # Bumped 10s → 60s. The always-chown-R policy in the entrypoint
      # means a user restoring a backup with a large attachment store
      # can spend tens of seconds before pad starts listening — 10s
      # would mark the container unhealthy mid-startup.
      start_period: 60s

  postgres:
    image: postgres:17-alpine
    environment:
      POSTGRES_USER: pad
      # Required. Fail-fast with the helpful error below when unset.
      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD:?POSTGRES_PASSWORD is required — see .env.example}"
      POSTGRES_DB: pad
    volumes:
      - pg-data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U pad"]
      interval: 5s
      timeout: 3s
      retries: 5
    restart: unless-stopped

  redis:
    image: redis:7-alpine
    command: redis-server --maxmemory 64mb --maxmemory-policy allkeys-lru
    volumes:
      - redis-data:/data
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 3s
      retries: 5
    restart: unless-stopped

volumes:
  pad-data:
  pg-data:
  redis-data: