module Fullscriptapi

# File lib/fullscriptapi.rb, line 15
def config
  yield self if block_given?

  self
end

# File lib/fullscriptapi.rb, line 27
def method_missing(name, *args, &block)
  @requested_method_hash = api_json_meta.detect { |v| v[:api_method] == name.to_s }
  
  super unless requested_method_hash

  refresh_token if stale_token? # TO-DO: write logic to improve token refresh

  params = excon_params(*args)
  
  Excon.send(*params)
end

# File lib/fullscriptapi.rb, line 22
def use_token(opts = {})
  # pass in a hash containing token attributes e.g. access_token, refresh_token, expires_*
  @token = Fullscriptapi::AccessToken.new(opts)
end

# File lib/fullscriptapi.rb, line 51
def api_json_meta
  @_api_json_meta ||= begin
    available_methods = []
    openapi_json.each do |key, value|
      http_methods = value.keys

      http_methods.each do |method|
        api_method = value[method.to_s]["summary"].downcase.gsub(" ", "_")
        hash_to_add = {
          api_method: api_method,
          http_method: method,
          path: key
        }
        available_methods << hash_to_add # [ { api_method: "create_a_patient, http_method: "post", path: "api/clinic/patients" }, ... ]
      end
    end
    available_methods
  end
end

# File lib/fullscriptapi.rb, line 71
def excon_params(*args)
  path, http_method, api_method = requested_method_hash.values_at(:path, :http_method, :api_method)
  args_hash = args.first
  first_bracket = path.index('{')
  second_bracket = path.index('}')

  path_dup = path.dup
  if args_hash.is_a?(Hash) && args_hash[:query]
    path_dup[first_bracket..second_bracket] = args_hash[:query][:id] if args_hash[:query][:id] && first_bracket && second_bracket
    path_dup += "?query=#{args_hash[:query][:search]}" if args_hash[:query][:search]
  end

  url = "#{get_server}#{path_dup}"

  params = {
    headers: {
      "Content-Type": "application/json",
      "Authorization": "Bearer #{token.access_token}"
    }
  }

  params.merge!(body: args_hash[:body].to_json) if args_hash.is_a?(Hash) && args_hash[:body] && args_hash[:body].is_a?(Hash)

  return http_method.to_sym, url, params
end

# File lib/fullscriptapi.rb, line 46
def openapi_json
  @_openapi_json ||=
  JSON.parse(File.read(File.join(File.dirname(__FILE__), '../openapi.json')))["paths"]
end

# File lib/fullscriptapi.rb, line 42
def stale_token?
  token && token.expired?
end