#!/bin/sh
# POSIX-only, /bin/sh compatible, ASCII-only
# Dry-run by default; use --write to apply changes
# Logs: $LOG_DIR (from env), Plan: $PLAN_OUT
set -u

# Load env
if [ -f "/etc/synomap/synomap.env" ]; then
  . /etc/synomap/synomap.env
fi

# Defaults if not set
QB_URL="${QB_URL:-}"
QB_USER="${QB_USER:-}"
QB_PASS="${QB_PASS:-}"
MAP_FILE="${MAP_FILE:-}"
DEST_ROOT="${DEST_ROOT:-}"
QB_CATEGORIES="${QB_CATEGORIES:-sonarr,radarr}"
QB_EXCLUDE_CATEGORIES="${QB_EXCLUDE_CATEGORIES:-hum}"
TAG_DONE="${TAG_DONE:-SYNO}"
PLAN_OUT="${PLAN_OUT:-/root/synomap_plan.txt}"
LOG_DIR="${LOG_DIR:-/var/log/synomap}"
LOCK_DIR="${LOCK_DIR:-/var/lock/synomap}"
UMASK_VAL="${UMASK:-002}"

umask "$UMASK_VAL"

mkdir -p "$LOG_DIR" "$LOCK_DIR" 2>/dev/null || true

DRY=1
WRITE=0
PLAN=""
LIMIT=""

log() { printf "%s %s
" "$(date +%Y-%m-%dT%H:%M:%S)" "$*" | tee -a "$LOG_DIR/synomap.log" ; }
nok() { log "[NOK] $*"; }
ok()  { log "[OK] $*"; }
note(){ log "[NOTE] $*"; }

qb_cookie=""
qb_login() {
  qb_cookie="$(mktemp)"
  curl -sS -c "$qb_cookie"     --data-urlencode "username=$QB_USER"     --data-urlencode "password=$QB_PASS"     "$QB_URL/api/v2/auth/login" >/dev/null 2>&1 || return 1
  return 0
}

qb_api() {
  m="$1"; shift
  p="$1"; shift
  if [ "$m" = "GET" ]; then
    curl -sS -b "$qb_cookie" "$QB_URL$p" 2>/dev/null
  else
    curl -sS -b "$qb_cookie" -X POST "$QB_URL$p" "$@" 2>/dev/null
  fi
}

qb_info_many() {
  qb_api GET "/api/v2/torrents/info"
}

qb_set_location() {
  qb_api POST "/api/v2/torrents/setLocation" --data "hashes=$1" --data-urlencode "location=$2"
}

qb_add_tags() {
  qb_api POST "/api/v2/torrents/addTags" --data "hashes=$1" --data-urlencode "tags=$2"
}

qb_recheck() {
  qb_api POST "/api/v2/torrents/recheck" --data "hashes=$1"
}

poll_state() {
  h="$1"
  tm="${2:-120}"
  i=0
  while [ "$i" -lt "$tm" ]; do
    st="$(qb_api GET "/api/v2/torrents/info?hashes=$h" | tr -d '\r' | tr -d '\n' )"
    state="$(printf "%s" "$st" | sed -n 's/.*\"state\":\"\([^\"]*\)\".*/\1/p')"
    if [ -n "$state" ] ; then
      log "[STATE] $h = $state"
      case "$state" in
        checking*|queuedForChecking) : ;;
        downloading|stalledDL|stalledUP|uploading|pausedUP|pausedDL) break ;;
        *) : ;;
      esac
    fi
    sleep 2
    i=$((i+2))
  done
}

# CLI parse
while [ $# -gt 0 ]; do
  case "$1" in
    --write) DRY=0; WRITE=1; shift;;
    --dry-run) DRY=1; WRITE=0; shift;;
    --plan) PLAN="$2"; shift 2;;
    --limit) LIMIT="$2"; shift 2;;
    *) note "arg ignored: $1"; shift;;
  esac
done

# synomap_apply_from_plan.sh
# Execute migration from a plan: hash|src|dst|category

if [ -n "$PLAN" ]; then
  PLAN_IN="$PLAN"
else
  PLAN_IN="$PLAN_OUT"
fi

[ -f "$PLAN_IN" ] || { nok "Plan missing: $PLAN_IN"; exit 0; }

ok "Login to qBittorrent"
if ! qb_login; then
  nok "qB login failed"
  exit 0
fi

i=0
while IFS='|' read -r h src dst catg; do
  [ -z "$h" ] && continue
  i=$((i+1))
  log "[STEP] $i hash=$h cat=$catg"
  if [ "$DRY" -eq 1 ]; then
    log "MKDIR -p $dst"
    log "HARDLINK from $src -> $dst (all files)"
    log "qB:setLocation $h -> $dst ; addTags $TAG_DONE ; recheck"
    continue
  fi

  mkdir -p "$dst" || { nok "mkdir failed: $dst"; continue; }

  if [ -d "$src" ]; then
    # link all files; fallback copy if ln fails
    import_failed=0
    # Use find -print0; read -d '' loop
    import_failed=0
    find "$src" -type f -print0 | while IFS= read -r -d '' f; do
      rel="${f#$src/}"
      out="$dst/$rel"
      odir="$(dirname "$out")"
      mkdir -p "$odir" || true
      if ln "$f" "$out" 2>/dev/null; then
        :
      else
        cp -p "$f" "$out" 2>/dev/null || import_failed=1
      fi
    done
    if [ "$import_failed" -ne 0 ]; then
      nok "file import encountered errors for $src"
    fi
  else
    nok "src not a dir: $src"
  fi

  qb_api POST "/api/v2/torrents/setLocation" --data "hashes=$h" --data-urlencode "location=$dst" >/dev/null
  qb_api POST "/api/v2/torrents/addTags" --data "hashes=$h" --data-urlencode "tags=$TAG_DONE" >/dev/null
  qb_api POST "/api/v2/torrents/recheck" --data "hashes=$h" >/dev/null
  # poll
  st="$(poll_state "$h" 120)"

done < "$PLAN_IN"

ok "Apply finished"
rm -f "$qb_cookie"
exit 0