#!/bin/bash
set -euo pipefail

INSTALL_URL="${SUMR_INSTALL_URL:-https://sumr.co/install}"
SUMR_HOME="${SUMR_HOME:-$HOME/.sumr}"
SUMR_BACKUPS_DIR="$SUMR_HOME/backups"

if [ -t 1 ] && [ "${TERM:-}" != "dumb" ]; then
  COLOR_RESET="$(printf '\033[0m')"
  COLOR_DIM="$(printf '\033[2m')"
  COLOR_BLUE="$(printf '\033[34m')"
  COLOR_GREEN="$(printf '\033[32m')"
  COLOR_YELLOW="$(printf '\033[33m')"
  COLOR_RED="$(printf '\033[31m')"
else
  COLOR_RESET=""
  COLOR_DIM=""
  COLOR_BLUE=""
  COLOR_GREEN=""
  COLOR_YELLOW=""
  COLOR_RED=""
fi

print_line() {
  local color="$1"
  local prefix="$2"
  local message="$3"
  printf '%b%s%b %s\n' "$color" "$prefix" "$COLOR_RESET" "$message"
}

print_note() {
  local title="$1"
  shift
  local width=${#title}
  local line

  for line in "$@"; do
    if [ "${#line}" -gt "$width" ]; then
      width=${#line}
    fi
  done

  local top_rule_len=$((width - ${#title}))
  if [ "$top_rule_len" -lt 0 ]; then
    top_rule_len=0
  fi

  local top_rule
  local bottom_rule
  top_rule="$(printf '%*s' "$top_rule_len" '' | tr ' ' '─')"
  bottom_rule="$(printf '%*s' $((width + 2)) '' | tr ' ' '─')"

  printf '\n'
  printf '%b◇ %s %s╮%b\n' "$COLOR_BLUE" "$title" "$top_rule" "$COLOR_RESET"
  printf '%b│%b %-*s %b│%b\n' "$COLOR_DIM" "$COLOR_RESET" "$width" "" "$COLOR_DIM" "$COLOR_RESET"
  for line in "$@"; do
    printf '%b│%b %-*s %b│%b\n' "$COLOR_DIM" "$COLOR_RESET" "$width" "$line" "$COLOR_DIM" "$COLOR_RESET"
  done
  printf '%b╰%s╯%b\n' "$COLOR_DIM" "$bottom_rule" "$COLOR_RESET"
}

step() {
  printf '\n'
  print_line "$COLOR_BLUE" ">" "$1"
}

info() {
  print_line "$COLOR_DIM" "-" "$1"
}

success() {
  print_line "$COLOR_GREEN" "+" "$1"
}

fail() {
  print_line "$COLOR_RED" "x" "$1" >&2
}

display_path() {
  local path="$1"
  printf '%s' "${path/#$HOME/~}"
}

prepare_sumr_home() {
  mkdir -p "$SUMR_HOME"
  chmod 700 "$SUMR_HOME" 2>/dev/null || true
  mkdir -p "$SUMR_BACKUPS_DIR"
  chmod 700 "$SUMR_BACKUPS_DIR" 2>/dev/null || true
}

usage() {
  cat <<USAGE
SUMR installer

Usage:
  curl -fsSL ${INSTALL_URL} | bash

Options:
  --help      Show this help
USAGE
}

install() {
  local package="${SUMR_PACKAGE_NAME:-@sumrco/cli}"
  local package_version="${SUMR_PACKAGE_VERSION:-latest}"
  local install_output
  local install_status

  step "Installing public SUMR CLI"
  info "Package: ${package}@${package_version}"

  prepare_sumr_home
  info "SUMR home: $(display_path "$SUMR_HOME")"

  if ! command -v bun >/dev/null 2>&1; then
    fail "Bun is required to install and run SUMR CLI."
    info "Install Bun first: curl -fsSL https://bun.sh/install | bash"
    exit 1
  fi

  set +e
  install_output="$(bun add -g "${package}@${package_version}" 2>&1)"
  install_status=$?
  set -e

  if [ "$install_status" -ne 0 ]; then
    fail "Could not install ${package}@${package_version}."
    printf '%s\n' "$install_output" >&2
    exit "$install_status"
  fi

  success "Installed ${package}@${package_version}"

  printf '\n'
  success "SUMR is ready."
  print_note "Next steps" "sumr --help"
  print_note "Team access" "curl -fsSL ${INSTALL_URL}/private | bash"
}
if [ "${1:-}" = "--help" ] || [ "${1:-}" = "-h" ]; then
  usage
  exit 0
fi

install