#!/data/data/com.termux/files/usr/bin/bash
set -euo pipefail

# iiab Termux chained bootstrap launcher
# Intended usage:
#   curl iiab.io/termux.txt | bash
#   curl iiab.io/termux.txt | bash -s -- --help
#   curl iiab.io/termux.txt | bash -s -- --all --debug

log()  { printf "[iiab] %s\n" "$*"; }
warn() { printf "[iiab] WARNING: %s\n" "$*" >&2; }
die()  { printf "[iiab] ERROR: %s\n" "$*" >&2; exit 1; }

need() { command -v "$1" >/dev/null 2>&1; }

# ---- hard requirement: curl, if not exit ----
need curl || die "Missing 'curl'. Please run first: pkg install -y curl"

CURL=(curl -fsSL --retry 5 --retry-connrefused --retry-delay 2)

PREFIX="${PREFIX:-/data/data/com.termux/files/usr}"
DEST="$PREFIX/bin/iiab-termux"
BUNDLE_PRIMARY="https://raw.githubusercontent.com/iiab/iiab-android/main/iiab-termux"

# Temporary file
mkdir -p "${DEST%/*}"
tmp="${DEST}.tmp.$$"
cleanup() { rm -f "$tmp" >/dev/null 2>&1 || true; }
trap cleanup EXIT INT TERM

# Backup existing installed command
if [[ -f "$DEST" ]]; then
  ts="$(date +%Y%m%d-%H%M%S 2>/dev/null || echo now)"
  mv -f "$DEST" "${DEST}.old.${ts}" 2>/dev/null || true
fi

log "Downloading iiab-termux bundle..."
"${CURL[@]}" "$BUNDLE_PRIMARY" -o "$tmp" || die "Unable to download bundle from URL."

# Sanity check: first line must be a shebang mentioning bash
first_line=""
IFS= read -r first_line < "$tmp" || true
if [[ "$first_line" != \#!*bash* ]]; then
  warn "Downloaded file first line: ${first_line:-<empty>}"
  die "Downloaded content doesn't look like a bash script (wrong URL or HTML error page)."
fi

chmod 0755 "$tmp"
mv -f "$tmp" "$DEST"
log "Installed: $DEST"

# Run installed command:
# - If launcher received args -> pass through
# - Else -> default to --all
if [[ $# -gt 0 ]]; then
  exec "$DEST" "$@"
else
  exec "$DEST" --all
fi