require "json"
require "openssl/hmac"
require "openssl/sha1"

require "./gitea.cr"
require "./github.cr"
require "./gitlab.cr"

class Payload
	include JSON::Serializable

	property kind    : String
	property project : String
	property content : String
	property secret  : String = ""

	def initialize(req : HTTP::Request)
		@content = req.body.not_nil!.gets_to_end.to_s

		agent = req.headers.fetch("User-Agent", "None")
		if agent == "GiteaServer" && req.headers.has_key?("X-Gitea-Event")
			@kind = "gitea"
			content = Gitea::Payload.from_json @content
			@project = content.repository.full_name
			@secret = content.secret

		elsif agent.starts_with?("GitHub-Hookshot/") && req.headers.has_key?("X-Github-Event")
			@kind = "github"
			content = Github::Payload.from_json @content
			@project = content.repository.full_name
			hash = req.headers.fetch("X-Hub-Signature", "None")
      if hash != "None"
        @secret = hash.to_s
      end

		elsif req.headers.has_key?("X-Gitlab-Event")
			@kind = "gitlab"
			content = Gitlab::Payload.from_json @content
			@project = content.project.path_with_namespace
			token = req.headers.fetch("X-Gitlab-Token", "None")
      if token != "None"
        @secret = token.to_s
      end

		else
			@kind = "undefined"
			@project = "undefined"
		end
	end

	def check?(token)
		pp token
		pp @secret
		if @kind == "github"
    	data = JSON.parse(@content).to_json
    	given_secret = "sha1=" + OpenSSL::HMAC.hexdigest(:sha1, @secret, data)
  	end

		token == @secret
	end
end