module Tina4::Env

def self.truthy?(val)
  %w[true 1 yes on].include?(val.to_s.strip.downcase)
end

def all_env
  ENV.to_h
end

def create_default_env(path)
  api_key = Digest::MD5.hexdigest(Time.now.to_s)
  content = DEFAULT_ENV.map { |k, v| "#{k}=\"#{v}\"" }.join("\n")
  content += "\nAPI_KEY=\"#{api_key}\"\n"
  File.write(path, content)
end

def get_env(key, default = nil)
  ENV[key.to_s] || default
end

def has_env?(key)
  ENV.key?(key.to_s)
end

def load_env(root_dir = Dir.pwd)
  env_file = resolve_env_file(root_dir)
  unless File.exist?(env_file)
    create_default_env(env_file)
  end
  parse_env_file(env_file)
end

def parse_env_file(path)
  return unless File.exist?(path)
  File.readlines(path).each do |line|
    line = line.strip
    next if line.empty? || line.start_with?("#")
    if (match = line.match(/\A([A-Za-z_][A-Za-z0-9_]*)=["']?(.*)["']?\z/))
      key = match[1]
      value = match[2].gsub(/["']\z/, "")
      ENV[key] ||= value
      @loaded_keys ||= []
      @loaded_keys << key
    end
  end
end

def require_env!(*keys)
  missing = keys.map(&:to_s).reject { |k| ENV.key?(k) }
  unless missing.empty?
    raise KeyError, "Missing required env vars: #{missing.join(', ')}"
  end
end

def reset_env
  @loaded_keys&.each { |k| ENV.delete(k) }
  @loaded_keys = []
end

def resolve_env_file(root_dir)
  environment = ENV["ENVIRONMENT"]
  if environment && !environment.empty?
    candidate = File.join(root_dir, ".env.#{environment}")
    return candidate if File.exist?(candidate)
  end
  File.join(root_dir, ".env")
end