#!/bin/sh
#
# shepta-frontend one-liner installer (POSIX sh; works with dash/bash)
#
#   curl -fsSL <URL>/install.sh | sh
#   curl -fsSL <URL>/install.sh | sudo sh
#   sh install.sh
#
set -eu

# ---------------------------------------------------------------------------
# config
# ---------------------------------------------------------------------------
KEY_URL="https://36da79c3e961cdfbbf475ca203e5759ddc31589d@yena.dev/api/packages/Furrydelphia/debian/repository.key"
KEYRING="/etc/apt/keyrings/forgejo-Furrydelphia.asc"
LIST_FILE="/etc/apt/sources.list.d/forgejo.list"
PACKAGE="shepta-frontend"
COMPONENT="main"

REPO_URL="$(dirname "$KEY_URL")"   # .../Furrydelphia/debian

# ---------------------------------------------------------------------------
# pretty output (color only when stdout is a tty)
# ---------------------------------------------------------------------------
C_RED=""; C_GRN=""; C_YEL=""; C_BLU=""; C_BLD=""; C_DIM=""; C_RST=""
if [ -t 1 ]; then
  ESC=$(printf '\033')
  C_RED="${ESC}[31m";  C_GRN="${ESC}[32m";  C_YEL="${ESC}[33m";  C_BLU="${ESC}[34m"
  C_BLD="${ESC}[1m";   C_DIM="${ESC}[2m";   C_RST="${ESC}[0m"
fi

log()  { printf "%s==>%s %s\n" "$C_BLU" "$C_RST" "$*"; }
ok()   { printf "  %s✓%s %s\n" "$C_GRN" "$C_RST" "$*"; }
warn() { printf "  %s!%s %s\n" "$C_YEL" "$C_RST" "$*" >&2; }
die()  { printf "  %s✗%s %s\n" "$C_RED" "$C_RST" "$*" >&2; _FAILED=1; exit 1; }

# friendly message on an unexpected (set -e) exit; skipped for explicit die()
_FAILED=0
trap 'rc=$?; if [ "$rc" -ne 0 ] && [ "$_FAILED" -eq 0 ]; then printf "  %s✗%s installer aborted (exit %s)\n" "$C_RED" "$C_RST" "$rc" >&2; fi' EXIT

# ---------------------------------------------------------------------------
# preflight checks
# ---------------------------------------------------------------------------
log "shepta-frontend installer"

[ "$(id -u)" -eq 0 ] || warn "not running as root — sudo will be prompted per step."

command -v apt-get >/dev/null 2>&1 || die "apt-get not found; this installer targets Debian/Ubuntu (Raspbian)."
command -v curl    >/dev/null 2>&1 || die "curl not found; please install it first."

ARCH="$(dpkg --print-architecture 2>/dev/null)" || die "could not detect apt architecture."
ok "detected architecture: ${C_BLD}${ARCH}${C_RST}"

# ---------------------------------------------------------------------------
# step 1 — add the repository signing key (atomic: never clobber a good key)
# ---------------------------------------------------------------------------
log "adding repository signing key"
sudo install -d -m 0755 /etc/apt/keyrings
sudo curl -fsSL "$KEY_URL" -o "$KEYRING.tmp"
sudo chmod 0644 "$KEYRING.tmp"
sudo mv "$KEYRING.tmp" "$KEYRING"
ok "key written to ${C_DIM}${KEYRING}${C_RST}"

# ---------------------------------------------------------------------------
# step 2 — add the apt source (idempotent: overwrite, never duplicate)
# ---------------------------------------------------------------------------
log "adding apt source for ${PACKAGE}"
LIST_LINE="deb [signed-by=${KEYRING}] ${REPO_URL} ${ARCH} ${COMPONENT}"
echo "$LIST_LINE" | sudo tee "$LIST_FILE" >/dev/null
ok "source written to ${C_DIM}${LIST_FILE}${C_RST}"

# ---------------------------------------------------------------------------
# step 3 — update package index
# ---------------------------------------------------------------------------
log "updating apt package index"
sudo apt-get update -qq
ok "package index updated"

# ---------------------------------------------------------------------------
# step 4 — install
# ---------------------------------------------------------------------------
log "installing ${C_BLD}${PACKAGE}${C_RST}"
sudo apt-get install -y "$PACKAGE"
ok "${PACKAGE} installed"

# ---------------------------------------------------------------------------
# summary
# ---------------------------------------------------------------------------
if command -v dpkg >/dev/null 2>&1; then
  VER="$(dpkg -s "$PACKAGE" 2>/dev/null | awk '/^Version:/ {print $2}')"
  if [ -n "$VER" ]; then ok "version ${C_BLD}${VER}${C_RST}"; fi
fi

printf "\n%sDone.%s shepta-frontend is installed.\n" "$C_GRN" "$C_RST"