#!/bin/sh
# setup.sh - OS dispatcher for the 759705.cc bootstrap scripts.
#
# Purpose   : Detect the current operating system and hand off to the matching
#             bootstrap script, so there is exactly one URL to remember.
# Usage     : curl -fsSL https://759705.cc/setup.sh | sh
# Idempotent: yes. This script only detects and dispatches; the script it calls
#             checks every step before acting, so re-running is always safe.
# Dry run   : HUB_DRY_RUN=1 prints what would happen and downloads/runs nothing.
#               HUB_DRY_RUN=1 sh setup.sh
# Local test: HUB_BASE overrides the base URL.
#               HUB_BASE=http://localhost:4321 HUB_DRY_RUN=1 sh setup.sh
#
# Contains no secrets and no internal hostnames; safe to serve publicly.

set -eu

HUB_BASE="${HUB_BASE:-https://759705.cc}"
HUB_DRY_RUN="${HUB_DRY_RUN:-0}"

log()  { printf '==>  %s\n' "$*"; }
note() { printf '     %s\n' "$*"; }
warn() { printf '!!   %s\n' "$*" >&2; }

main() {
  os="$(uname -s 2>/dev/null || echo unknown)"
  log "hub setup - detected system: ${os}"

  case "$os" in
    Darwin)
      log "macOS detected. Handing off to ${HUB_BASE}/mac.sh"
      if [ "$HUB_DRY_RUN" = "1" ]; then
        printf 'DRY  curl -fsSL %s/mac.sh | sh\n' "$HUB_BASE"
        note "Dry run: nothing was downloaded and nothing was executed."
        return 0
      fi
      if ! command -v curl >/dev/null 2>&1; then
        warn "curl is required but was not found on PATH."
        return 1
      fi
      # Pass HUB_BASE through so the child script resolves against the same host.
      curl -fsSL "$HUB_BASE/mac.sh" | HUB_BASE="$HUB_BASE" HUB_DRY_RUN="$HUB_DRY_RUN" sh
      ;;

    Linux)
      log "Linux detected."
      note "There is no generic Linux baseline script yet."
      note "Manual steps: ${HUB_BASE}/commands/linux/"
      note "Clash Verge Rev on Ubuntu desktop (needs a subcommand, see usage):"
      note "  curl -fsSL ${HUB_BASE}/clash.sh | sh -s -- all"
      return 0
      ;;

    CYGWIN* | MINGW* | MSYS* | Windows_NT)
      log "Windows detected (POSIX compatibility layer)."
      note "Run this in PowerShell 5.1 or newer instead:"
      note "  irm ${HUB_BASE}/win.ps1 | iex"
      return 0
      ;;

    *)
      warn "Unsupported system: ${os}"
      note "Supported: macOS (${HUB_BASE}/mac.sh), Windows (${HUB_BASE}/win.ps1)."
      note "On Windows run: irm ${HUB_BASE}/win.ps1 | iex"
      return 0
      ;;
  esac
}

main "$@"