#!/bin/sh
# Proof of Work (proof-of-work) — StartOS 0.4 container entrypoint.
#
# Responsibilities (in order):
#   1. Ensure the persistent /data directory exists.
#   2. Seed /data on truly-fresh first boot:
#      a. If /app/seed/data/app.db is present (v1.0.0:1 cutover image),
#         copy it into /data. This is how an operator migrating from
#         the legacy `workout-log` package preserves their full history.
#      b. Otherwise fall back to the empty-schema fallback DB at
#         /app/prisma/data/app.db (already seeded with the curated
#         exercise library at build time).
#      Both branches are gated on /data/app.db being absent AND
#      /data/.seeded being absent — never overwrites live data.
#   3. Run idempotent compat ALTERs for columns added after older snapshots.
#      No-ops on hosts whose schema is already current.
#   4. Ensure the curated exercise library is present for every user. New
#      maintainer-shipped exercises appear on every boot (INSERT OR IGNORE
#      keyed on (userId, name); never overwrites a user's own exercises).
#   5. Exec the Next.js standalone server as PID 1 (under dumb-init).
#
# Every branch logs to stderr so it is visible in StartOS -> Logs.

set -eu

DATA_DIR="${WORKOUT_DATA_DIR:-/data}"
DB_PATH="${WORKOUT_DB_PATH:-$DATA_DIR/app.db}"
FALLBACK_SEED_DB_PATH="${WORKOUT_FALLBACK_SEED_DB_PATH:-/app/prisma/data/app.db}"
BAKED_SEED_DB_PATH="${WORKOUT_BAKED_SEED_DB_PATH:-/app/seed/data/app.db}"
LIBRARY_JSON_PATH="${WORKOUT_LIBRARY_JSON_PATH:-/app/prisma/exercises.seed.json}"

log() {
  # write to stderr so StartOS log viewer surfaces it immediately
  printf '[entrypoint] %s\n' "$*" 1>&2
}

mkdir -p "$DATA_DIR"

# -----------------------------------------------------------------------------
# Step 1 — first-boot seeding. NEVER overwrites an existing app.db.
# Both branches are skipped on every restart of an installed host because
# /data/app.db already exists.
# -----------------------------------------------------------------------------
if [ ! -f "$DB_PATH" ] && [ ! -f "$DATA_DIR/.seeded" ]; then
  if [ -f "$BAKED_SEED_DB_PATH" ]; then
    log "no $DB_PATH and no .seeded marker; copying baked cutover seed from $BAKED_SEED_DB_PATH"
    cp "$BAKED_SEED_DB_PATH" "$DB_PATH"
    date -u +"seeded from baked cutover snapshot at %Y-%m-%dT%H:%M:%SZ" > "$DATA_DIR/.seeded"
  elif [ -f "$FALLBACK_SEED_DB_PATH" ]; then
    log "no $DB_PATH and no baked seed; copying empty-schema fallback from $FALLBACK_SEED_DB_PATH"
    cp "$FALLBACK_SEED_DB_PATH" "$DB_PATH"
    date -u +"seeded from empty-schema fallback at %Y-%m-%dT%H:%M:%SZ" > "$DATA_DIR/.seeded"
  else
    log "no $DB_PATH, no baked seed, no fallback DB; creating empty $DB_PATH"
    touch "$DB_PATH"
  fi
else
  log "$DB_PATH already present; live data is the source of truth"
  if [ -f "$DATA_DIR/.seeded" ]; then
    log "found .seeded: $(cat "$DATA_DIR/.seeded")"
  fi
fi

# -----------------------------------------------------------------------------
# Step 2 — idempotent compat ALTERs (safety net for older snapshots).
# No-ops on hosts whose schema is already current.
# -----------------------------------------------------------------------------
if command -v sqlite3 >/dev/null 2>&1 && [ -f "$DB_PATH" ]; then
  if ! sqlite3 "$DB_PATH" "PRAGMA table_info('SetLog');" 2>/dev/null | grep -q "|customMetrics|"; then
    log "adding missing column SetLog.customMetrics"
    sqlite3 "$DB_PATH" "ALTER TABLE SetLog ADD COLUMN customMetrics TEXT;"
  fi

  if ! sqlite3 "$DB_PATH" "PRAGMA table_info('Workout');" 2>/dev/null | grep -q "|deletedAt|"; then
    log "adding missing column Workout.deletedAt"
    sqlite3 "$DB_PATH" "ALTER TABLE Workout ADD COLUMN deletedAt DATETIME;"
  fi
fi

# -----------------------------------------------------------------------------
# Step 3 — ensure curated exercise library for every user (multi-user-aware).
# New entries shipped in /app/prisma/exercises.seed.json appear on every boot.
# `INSERT OR IGNORE` keyed on (userId, name) so we never overwrite a user's
# own custom exercises. Designed to be additive only — exercises removed from
# the curated JSON are not deleted from existing installs (users may have
# logged sets against them).
# -----------------------------------------------------------------------------
if [ -f "$LIBRARY_JSON_PATH" ] && [ -f "$DB_PATH" ]; then
  log "ensuring curated exercise library is present for every user"
  node /app/prisma/ensureExerciseLibrary.cjs \
    --db "$DB_PATH" \
    --json "$LIBRARY_JSON_PATH" \
    || log "WARNING: ensureExerciseLibrary failed; continuing boot"
else
  log "skipping library ensure (json or db not found)"
fi

# -----------------------------------------------------------------------------
# Step 4 — launch the app.
# -----------------------------------------------------------------------------
export DATABASE_URL="file:$DB_PATH"
export NODE_ENV="${NODE_ENV:-production}"
export HOSTNAME="${HOSTNAME:-0.0.0.0}"
export PORT="${PORT:-3000}"

log "launching Next.js on :${PORT} with DATABASE_URL=file:${DB_PATH}"
exec node /app/server.js