#!/usr/bin/env bash
# lib/brew.sh — Homebrew install + Brewfile dump/restore.

ssr::brew::ensure_installed() {
    if command -v brew >/dev/null 2>&1; then
        return 0
    fi

    # Homebrew's install script requires sudo on macOS to write to /opt/homebrew
    # (Apple Silicon) or /usr/local (Intel). Check before running it so we can
    # give a clear error instead of a cryptic failure.
    if ! sudo -n true 2>/dev/null; then
        ssr::warn "Homebrew is not installed and sudo access is required to install it."
        ssr::warn "Please run the following as an admin user and re-run ssr restore:"
        ssr::warn "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
        ssr::die "Cannot install Homebrew without sudo access."
    fi

    ssr::log "Homebrew not found — installing"
    # NONINTERACTIVE=1 skips the confirmation prompt; sudo is available (checked above).
    NONINTERACTIVE=1 /bin/bash -c \
        "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

    # Ensure brew is on PATH for both Apple Silicon and Intel layouts.
    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 || ssr::die "brew still not on PATH after install"
}

ssr::brew::update() {
    ssr::log "brew update"
    brew update --quiet
}

ssr::brew::upgrade() {
    [[ "${SSR_BREW_UPGRADE:-true}" == "true" ]] || return 0
    ssr::log "brew upgrade"
    brew upgrade --quiet || ssr::warn "brew upgrade reported errors (continuing)"
}

ssr::brew::cleanup() {
    [[ "${SSR_BREW_CLEANUP:-true}" == "true" ]] || return 0
    ssr::log "brew cleanup"
    brew cleanup --quiet || true
}

# Dumps Brewfile to the cloud backup dir with a timestamped rotation copy.
ssr::brew::dump() {
    local backup_dir="$1" brewfile="$1/Brewfile"
    ssr::ensure_dir "$backup_dir"
    if [[ -f "$brewfile" ]]; then
        cp -f "$brewfile" "$brewfile.bak"
    fi
    ssr::log "brew bundle dump → $brewfile"
    (
        cd "$backup_dir"
        brew bundle dump --describe --quiet --force --file=Brewfile
    )
    ssr::ok "Brewfile written ($(wc -l < "$brewfile" | tr -d ' ') lines)"
}

ssr::brew::restore() {
    local brewfile="$1"
    [[ -f "$brewfile" ]] || ssr::die "Brewfile not found: $brewfile"
    ssr::log "brew bundle install ← $brewfile"
    brew bundle install --file="$brewfile" --verbose
}