#!/usr/bin/env bash
# Startup sequence for the bind-mounted repo:
#   1. install dependencies only when package-lock.json actually changed;
#   2. regenerate the Prisma client only when the schema actually changed;
#   3. apply pending migrations;
#   4. start in dev (watch) or prod (compiled) mode.
#
# The stamp files live under node_modules/, so a `git pull` that touches only
# application code goes straight to step 4.
set -euo pipefail

cd /app
mkdir -p data
STAMP_DIR="node_modules/.eks-stamps"

hash_of() { sha256sum "$1" 2>/dev/null | awk '{print $1}'; }

needs_refresh() {
  local file="$1" stamp="$STAMP_DIR/$2"
  [ -f "$stamp" ] || return 0
  [ "$(cat "$stamp")" = "$(hash_of "$file")" ] && return 1 || return 0
}

record() { mkdir -p "$STAMP_DIR"; hash_of "$1" > "$STAMP_DIR/$2"; }

# --include=dev is required even in prod mode: NODE_ENV=production would
# otherwise omit typescript/tsx, and both modes compile or watch from source.
if [ ! -d node_modules/typescript ] || needs_refresh package-lock.json lock; then
  echo "[entrypoint] installing dependencies"
  npm ci --include=dev --no-audit --no-fund
  record package-lock.json lock
else
  echo "[entrypoint] dependencies up to date"
fi

if [ ! -d node_modules/.prisma/client ] || needs_refresh prisma/schema.prisma schema; then
  echo "[entrypoint] generating prisma client"
  npx prisma generate
  record prisma/schema.prisma schema
fi

echo "[entrypoint] applying database migrations"
npx prisma migrate deploy

if [ "${RELAY_MODE:-prod}" = "dev" ]; then
  echo "[entrypoint] starting in dev mode (tsx watch — no rebuild needed)"
  exec npx tsx watch src/index.ts
fi

echo "[entrypoint] building and starting in prod mode"
npm run build
exec node dist/index.js