#!/usr/bin/env bash
# lib/core.sh — Foundation: logging, exit codes, git environment isolation
#
# Source this first. All other modules depend on it.

set -euo pipefail

# ─── Exit Codes ─────────────────────────────────────────────────────

readonly E_OK=0
readonly E_GENERAL=1
readonly E_CONFIG=10
readonly E_AUTH=11

# ─── Logging ────────────────────────────────────────────────────────
# All log output goes to stderr. Sync functions use stdout for return values.

log() {
  local level="$1"; shift
  echo "$(date -u +%H:%M:%S) [${level}] $*" >&2
}

die() { log "FATAL" "$@"; exit "$E_GENERAL"; }

# ─── Git Environment Isolation ──────────────────────────────────────
# Prevent user/system config from interfering with sync operations.
# Safe because josh-sync always runs as a subprocess, never sourced into
# an interactive shell.

export GIT_CONFIG_GLOBAL=/dev/null
export GIT_CONFIG_SYSTEM=/dev/null
export GIT_TERMINAL_PROMPT=0