#!/usr/bin/env bash
# Common utilities for strix-halo-optimizations scripts

set -euo pipefail

# Auto-detect project root
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[1]:-${BASH_SOURCE[0]}}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR" && while [[ ! -f Makefile ]] && [[ "$PWD" != "/" ]]; do cd ..; done; pwd)"
if [[ "$PROJECT_ROOT" == "/" ]]; then
    # Fallback: assume lib/ is one level below project root
    PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
fi

# Colors (disabled if not a terminal)
if [[ -t 1 ]]; then
    RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[0;33m'
    BLUE='\033[0;34m'; CYAN='\033[0;36m'; BOLD='\033[1m'
    DIM='\033[2m'; RESET='\033[0m'
else
    RED=''; GREEN=''; YELLOW=''; BLUE=''; CYAN=''; BOLD=''; DIM=''; RESET=''
fi

log_info()    { printf "${BLUE}[INFO]${RESET} %s\n" "$*"; }
log_success() { printf "${GREEN}[OK]${RESET}   %s\n" "$*"; }
log_warn()    { printf "${YELLOW}[WARN]${RESET} %s\n" "$*"; }
log_error()   { printf "${RED}[ERR]${RESET}  %s\n" "$*" >&2; }
log_header()  { printf "\n${BOLD}=== %s ===${RESET}\n" "$*"; }

is_cmd() { command -v "$1" &>/dev/null; }

require_root() {
    if [[ $EUID -ne 0 ]]; then
        log_error "This script requires root privileges. Run with sudo."
        exit 1
    fi
}

confirm() {
    local prompt="${1:-Continue?}"
    printf "${YELLOW}%s [y/N] ${RESET}" "$prompt"
    read -r reply
    [[ "$reply" =~ ^[Yy]$ ]]
}

data_dir() {
    local subdir="${1:-.}"
    local dir="$PROJECT_ROOT/data/$subdir"
    mkdir -p "$dir"
    echo "$dir"
}

timestamp() { date '+%Y%m%d-%H%M%S'; }