local helpers = require "spec.helpers"
local cjson = require "cjson"
local openssl_hmac = require "resty.openssl.hmac"

for _, strategy in helpers.each_strategy() do
  describe("Plugin: hmac-auth (invalidations) [#" .. strategy .. "]", function()
    local proxy_client
    local admin_client
    local consumer
    local credential
    local db

    lazy_setup(function()
      local bp
      bp, db = helpers.get_db_utils(strategy, {
        "routes",
        "services",
        "plugins",
        "consumers",
        "hmacauth_credentials",
      })

      local route = bp.routes:insert {
        hosts = { "hmacauth.com" },
      }

      bp.plugins:insert {
        name     = "hmac-auth",
        route = { id = route.id },
        config   = {
          clock_skew = 3000,
        },
      }

      consumer = bp.consumers:insert {
        username  = "consumer1",
        custom_id = "1234",
      }

      credential = bp.hmacauth_credentials:insert {
        username = "bob",
        secret   = "secret",
        consumer = { id = consumer.id },
      }

      assert(helpers.start_kong({
        database   = strategy,
        nginx_conf = "spec/fixtures/custom_nginx.template",
      }))

      proxy_client = helpers.proxy_client()
      admin_client = helpers.admin_client()
    end)

    lazy_teardown(function()
      if proxy_client and admin_client then
        proxy_client:close()
        admin_client:close()
      end

      helpers.stop_kong(nil, true)
    end)

    local function hmac_sha1_binary(secret, data)
      return openssl_hmac.new(secret, "sha1"):final(data)
    end

    local function get_authorization(username)
      local date = os.date("!%a, %d %b %Y %H:%M:%S GMT")
      local encodedSignature   = ngx.encode_base64(hmac_sha1_binary("secret", "date: " .. date))
      return [["hmac username="]] .. username
           .. [[",algorithm="hmac-sha1",headers="date",signature="]]
           .. encodedSignature .. [["]], date
    end

    describe("HMAC Auth Credentials entity invalidation", function()
      it("should invalidate when Hmac Auth Credential entity is deleted", function()
        -- It should work
        local authorization, date = get_authorization("bob")
        local res = assert(proxy_client:send {
          method = "GET",
          path = "/requests",
          body = {},
          headers = {
            ["HOST"] = "hmacauth.com",
            date = date,
            authorization = authorization
          }
        })
        assert.res_status(200, res)

        -- Check that cache is populated
        local cache_key = db.hmacauth_credentials:cache_key("bob")
        res = assert(admin_client:send {
          method = "GET",
          path   = "/cache/" .. cache_key,
          body   = {},
        })
        assert.res_status(200, res)

        -- Retrieve credential ID
        res = assert(admin_client:send {
          method = "GET",
          path   = "/consumers/consumer1/hmac-auth/",
          body   = {},
        })
        local body = assert.res_status(200, res)
        local credential_id = cjson.decode(body).data[1].id
        assert.equal(credential.id, credential_id)

        -- Delete Hmac Auth credential (which triggers invalidation)
        res = assert(admin_client:send {
          method = "DELETE",
          path   = "/consumers/consumer1/hmac-auth/" .. credential_id,
          body   = {},
        })
        assert.res_status(204, res)

        -- ensure cache is invalidated
        helpers.wait_for_invalidation(cache_key)

        -- It should not work
        authorization, date = get_authorization("bob")
        local res = assert(proxy_client:send {
          method  = "POST",
          body    = {},
          headers = {
            ["HOST"]      = "hmacauth.com",
            date          = date,
            authorization = authorization
          }
        })
        assert.res_status(401, res)
      end)
      it("should invalidate when Hmac Auth Credential entity is updated", function()
        local res = assert(admin_client:send {
          method  = "POST",
          path    = "/consumers/consumer1/hmac-auth/",
          body    = {
            username      = "bob",
            secret        = "secret",
            consumer      = { id = consumer.id },
          },
          headers = {
            ["Content-Type"] = "application/json",
          }
        })
        local body = assert.res_status(201, res)
        credential = cjson.decode(body)

        -- It should work
        local authorization, date = get_authorization("bob")
        local res = assert(proxy_client:send {
          method  = "GET",
          path    = "/requests",
          body    = {},
          headers = {
            ["HOST"]      = "hmacauth.com",
            date          = date,
            authorization = authorization
          }
        })
        assert.res_status(200, res)

        -- It should not work
        local authorization, date = get_authorization("hello123")
        res = assert(proxy_client:send {
          method  = "GET",
          path    = "/requests",
          body    = {},
          headers = {
            ["HOST"]      = "hmacauth.com",
            date          = date,
            authorization = authorization
          }
        })
        assert.res_status(401, res)

        -- Update Hmac Auth credential (which triggers invalidation)
        res = assert(admin_client:send {
          method  = "PATCH",
          path    = "/consumers/consumer1/hmac-auth/" .. credential.id,
          body    = {
            username         = "hello123"
          },
          headers = {
            ["Content-Type"] = "application/json"
          }
        })
        assert.res_status(200, res)

        -- ensure cache is invalidated
        local cache_key = db.hmacauth_credentials:cache_key("bob")
        helpers.wait_for_invalidation(cache_key)

        -- It should work
        local authorization, date = get_authorization("hello123")
        local res = assert(proxy_client:send {
          method  = "GET",
          body    = {},
          headers = {
            ["HOST"]      = "hmacauth.com",
            date          = date,
            authorization = authorization
          }
        })
        assert.res_status(200, res)
      end)
    end)
    describe("Consumer entity invalidation", function()
      it("should invalidate when Consumer entity is deleted", function()
        -- It should work
        local authorization, date = get_authorization("hello123")
        local res = assert(proxy_client:send {
          method  = "GET",
          path    = "/requests",
          body    = {},
          headers = {
            ["HOST"]      = "hmacauth.com",
            date          = date,
            authorization = authorization
          }
        })
        assert.res_status(200, res)

        -- Check that cache is populated
        local cache_key = db.hmacauth_credentials:cache_key("hello123")
        res = assert(admin_client:send {
          method = "GET",
          path   = "/cache/" .. cache_key,
          body   = {},
        })
        assert.res_status(200, res)

        -- Delete Consumer (which triggers invalidation)
        res = assert(admin_client:send {
          method = "DELETE",
          path   = "/consumers/consumer1",
          body   = {},
        })
        assert.res_status(204, res)

        -- ensure cache is invalidated
        helpers.wait_for_invalidation(cache_key)

        -- It should not work
        local authorization, date = get_authorization("bob")
        local res = assert(proxy_client:send {
          method  = "GET",
          body    = {},
          headers = {
            ["HOST"]      = "hmacauth.com",
            date          = date,
            authorization = authorization
          }
        })
        assert.res_status(401, res)
      end)
    end)
  end)
end