#!/usr/bin/env bash
#
# install.sh — one-shot installer for cmux + Claude Code on macOS
#
#   curl -fsSL https://YOUR-DOMAIN/install.sh | bash
#
# Installs (only what's missing):
#   • Xcode Command Line Tools   (needed by Homebrew)
#   • Homebrew                    (package manager)
#   • cmux                        (macOS terminal for AI coding agents)
#   • Claude Code                 (the `claude` CLI)
#
set -euo pipefail

# ---- pretty output -------------------------------------------------------
BOLD=$'\033[1m'; GREEN=$'\033[32m'; YELLOW=$'\033[33m'; RED=$'\033[31m'; RESET=$'\033[0m'
say()  { printf "%s\n" "${BOLD}==>${RESET} $*"; }
ok()   { printf "%s\n" "${GREEN}OK${RESET}  $*"; }
warn() { printf "%s\n" "${YELLOW}!${RESET}   $*"; }
die()  { printf "%s\n" "${RED}x  $*${RESET}" >&2; exit 1; }

# ---- preflight -----------------------------------------------------------
[ "$(uname -s)" = "Darwin" ] || die "This installer is for macOS. On Windows use install.ps1."

macos_ver="$(sw_vers -productVersion)"
macos_major="${macos_ver%%.*}"
if ! { [ "$macos_major" -ge 14 ] 2>/dev/null; }; then
  warn "cmux needs macOS 14 or later — you have $macos_ver. cmux may fail to install (Claude Code will still work)."
fi

# ---- Xcode Command Line Tools (Homebrew depends on these) ----------------
if ! xcode-select -p >/dev/null 2>&1; then
  say "Installing Xcode Command Line Tools (a system dialog may appear)…"
  xcode-select --install >/dev/null 2>&1 || true
  printf "    waiting for Command Line Tools to finish installing"
  until xcode-select -p >/dev/null 2>&1; do printf "."; sleep 5; done
  printf "\n"
  ok "Command Line Tools ready"
else
  ok "Command Line Tools already present"
fi

# ---- Homebrew ------------------------------------------------------------
if ! command -v brew >/dev/null 2>&1; then
  say "Installing Homebrew…"
  NONINTERACTIVE=1 /bin/bash -c \
    "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
fi
# Load brew into this shell session (Apple Silicon vs Intel paths)
if   [ -x /opt/homebrew/bin/brew ]; then eval "$(/opt/homebrew/bin/brew shellenv)"
elif [ -x /usr/local/bin/brew   ]; then eval "$(/usr/local/bin/brew shellenv)"; fi
command -v brew >/dev/null 2>&1 || die "Homebrew installation failed."
ok "Homebrew ready"

# ---- cmux ----------------------------------------------------------------
if [ -d "/Applications/cmux.app" ]; then
  ok "cmux already installed"
else
  say "Installing cmux…"
  brew tap manaflow-ai/cmux
  brew install --cask cmux
  ok "cmux installed"
fi

# ---- Claude Code ---------------------------------------------------------
if command -v claude >/dev/null 2>&1; then
  ok "Claude Code already installed"
else
  say "Installing Claude Code…"
  curl -fsSL https://claude.ai/install.sh | bash
fi
# The native installer drops `claude` in ~/.local/bin
export PATH="$HOME/.local/bin:$PATH"

# ---- verify --------------------------------------------------------------
say "Verifying installation…"
if claude --version >/dev/null 2>&1; then
  ok "Claude Code: $(claude --version 2>/dev/null)"
else
  warn "Claude Code installed but not yet on PATH — restart your terminal, then run: claude"
fi
if [ -d /Applications/cmux.app ]; then
  ok "cmux: /Applications/cmux.app"
else
  warn "cmux was not found in /Applications."
fi

# ---- launch + next steps -------------------------------------------------
cat <<EOF

${GREEN}${BOLD}All set!${RESET}

Next steps:
  1. cmux is opening now (or launch it from your Applications folder).
  2. Inside cmux, run:  ${BOLD}claude${RESET}
  3. The first run opens your browser to sign in.
     (Claude Code needs a Claude Pro/Max plan or an Anthropic API key.)

EOF
open -a cmux 2>/dev/null || true