#!/bin/bash
#
# script/install-darwin
#
# macOS-side install steps: ensure Homebrew is installed and on PATH,
# stow the `darwin` package, apply macOS preferences, run brew bundle +
# fisher, register fish in /etc/shells, and chsh to fish if needed.
#
# Invoked by `make install-darwin`.

set -euo pipefail

REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$REPO_ROOT"

# Install Homebrew if it's not already on PATH.
if ! command -v brew >/dev/null 2>&1; then
    /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
fi

# A fresh Homebrew install prints "add this to your profile" but does NOT
# put brew on the current shell's PATH. Source shellenv so the rest of
# this script (and any child processes) can find brew.
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

if ! command -v brew >/dev/null 2>&1; then
    echo "brew not on PATH after install" >&2
    exit 1
fi

./script/stow-package darwin

# Claude Code settings belong to each Mac, so copy the starter once instead
# of stowing it. A symlink (left by the old stowed copy) is replaced too.
# shortcut: shared keys don't sync after the first copy; add a jq merge if they change often.
CLAUDE_SETTINGS="$HOME/.claude/settings.json"
if [ -L "$CLAUDE_SETTINGS" ] || [ ! -e "$CLAUDE_SETTINGS" ]; then
    mkdir -p "$HOME/.claude"
    rm -f "$CLAUDE_SETTINGS"
    cp templates/claude-settings.json "$CLAUDE_SETTINGS"
fi

./script/apply-macos-preferences

make brew fisher

FISH_BIN="$(command -v fish || true)"
if [ -z "$FISH_BIN" ]; then
    echo "fish not installed after brew bundle" >&2
    exit 1
fi

# Register fish as a valid login shell if it isn't already. Use -Fx so
# we line-match exactly (no substring false positives).
if ! grep -Fxq "$FISH_BIN" /etc/shells; then
    echo "$FISH_BIN" | sudo tee -a /etc/shells >/dev/null
fi

# Switch the login shell to fish unless it's already set. Uses $SHELL as
# a best-effort check; if $SHELL is stale, chsh is a no-op when already set.
if [ "${SHELL:-}" != "$FISH_BIN" ]; then
    chsh -s "$FISH_BIN"
fi