# frozen_string_literal: true

require "httparty"
require "json"

module Dolibarr
  class Client
    include HTTParty

    class NotFoundError < StandardError; end
    class ValidationError < StandardError; end
    class Error < StandardError; end

    def initialize(
      base_url: ENV.fetch("DOLIBARR_URL"),
      api_key:  ENV.fetch("DOLIBARR_API_KEY")
    )
      @base_url = base_url
      @headers  = {
        "DOLAPIKEY"    => api_key,
        "Content-Type" => "application/json",
        "Accept"       => "application/json"
      }
    end

    def get(path, params = {})
      perform_request(:get, path, params)
    end

    def post(path, data = {})
      perform_request(:post, path, data)
    end

    def put(path, data = {})
      perform_request(:put, path, data)
    end

    private

    def perform_request(method, path, data = {})
      url = "#{@base_url}#{path}"
      opts = { headers: @headers }

      case method
      when :get
        opts[:query] = data unless data.empty?
        response = self.class.get(url, opts)
      when :post
        opts[:body] = data.to_json
        response = self.class.post(url, opts)
      when :put
        opts[:body] = data.to_json
        response = self.class.put(url, opts)
      end

      handle_response(response)
    rescue => e
      raise Error, "Connection error: #{e.message}"
    end

    def handle_response(response)
      return nil if response.body.nil? || response.body.strip.empty?

      code = response.code.to_i
      case code
      when 200..299
        response.parsed_response
      when 404
        raise NotFoundError, "Not found (404)"
      when 400
        raise ValidationError, "Validation error: #{response.body}"
      when 401
        raise Error, "Authentication failed (401) — check DOLIBARR_API_KEY"
      when 500..599
        raise Error, "Dolibarr server error (#{code}): #{response.body}"
      else
        raise Error, "Unexpected status #{code}: #{response.body}"
      end
    rescue JSON::ParserError => e
      raise Error, "JSON parse error: #{e.message}"
    end
  end
end