#!/usr/bin/env ruby
# configure_xcode.rb — stamped fresh from template on every build (see gitea.service.ts)
# Handles all Xcode project modifications at build time:
#   1. Adds GoogleService-Info.plist to the App target if present
#   2. Scans Swift sources for Firebase imports and links matching SPM products

require 'xcodeproj'

PROJECT_PATH = 'ios/App/App.xcodeproj'
TARGET_NAME  = 'App'
PLIST_SRC    = 'ios/App/App/GoogleService-Info.plist'

project = Xcodeproj::Project.open(PROJECT_PATH)
target  = project.targets.find { |t| t.name == TARGET_NAME }
abort "Target '#{TARGET_NAME}' not found in #{PROJECT_PATH}" unless target

# ── 1. GoogleService-Info.plist ───────────────────────────────────────────────
if File.exist?(PLIST_SRC)
  app_group = project.main_group['App']
  unless app_group&.files&.find { |f| f.path == 'GoogleService-Info.plist' }
    file_ref = app_group.new_reference('GoogleService-Info.plist')
    target.resources_build_phase.add_file_reference(file_ref)
    puts "Added GoogleService-Info.plist to target"
  end
end

# ── 2. Scan Swift sources for Firebase imports ────────────────────────────────
swift_files      = Dir['ios/App/App/**/*.swift']
firebase_imports = swift_files
  .flat_map { |f| File.readlines(f) rescue [] }
  .grep(/^\s*import\s+Firebase\w+/)
  .map  { |l| l.strip.split(/\s+/).last }
  .uniq
  .sort

if firebase_imports.empty?
  puts "No Firebase imports found — skipping SPM linking"
  project.save
  exit 0
end

puts "Firebase imports detected: #{firebase_imports.join(', ')}"

# ── 3. Find firebase-ios-sdk package reference ────────────────────────────────
firebase_pkg = project.root_object.package_references.find do |p|
  p.respond_to?(:repositoryURL) && p.repositoryURL.to_s.include?('firebase-ios-sdk')
end

unless firebase_pkg
  warn "WARNING: firebase-ios-sdk not registered in project — cannot auto-link products"
  project.save
  exit 0
end

# ── 4. Link helper ────────────────────────────────────────────────────────────
def link_spm_product(project, target, package_ref, product_name)
  return if target.package_product_dependencies.any? { |d| d.product_name == product_name }

  dep = project.new(Xcodeproj::Project::Object::XCSwiftPackageProductDependency)
  dep.product_name = product_name
  dep.package      = package_ref
  target.package_product_dependencies << dep

  build_file             = project.new(Xcodeproj::Project::Object::PBXBuildFile)
  build_file.product_ref = dep
  target.frameworks_build_phase.files << build_file

  puts "Linked #{product_name}"
end

# FirebaseCore is a prerequisite for all other Firebase products
link_spm_product(project, target, firebase_pkg, 'FirebaseCore')

firebase_imports.each do |product|
  next if product == 'FirebaseCore' # already linked above
  next if product == 'Firebase'     # umbrella import, not a linkable product
  link_spm_product(project, target, firebase_pkg, product)
end

project.save
puts "Xcode project configured"