/*
 * Copyright 2021 - 2023 Sporta Technologies PVT LTD & the ZIO HTTP contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package zio.http.headers

import java.net.URI

import zio.Scope
import zio.test._

import zio.http.Header.ClearSiteData
import zio.http.internal.HttpGen
import zio.http.{Header, URL, ZIOHttpSpec}

object LinkSpec extends ZIOHttpSpec {
  override def spec: Spec[TestEnvironment with Scope, Any] = suite("Link suite")(
    test("Parse links in the form of <uri>") {
      val headerValue = "<https://example.com/TheBook/chapter2>; rel=\"previous\""
      val uri         = URL.decode("https://example.com/TheBook/chapter2").getOrElse(throw new Exception("Invalid URL"))
      assertTrue(Header.Link.parse(headerValue) == Right(Header.Link(uri, Map("rel" -> "previous"))))
    },
    test("Fail to parse links without a URI") {
      val headerValue = "rel=\"previous\""
      assertTrue(Header.Link.parse(headerValue) == Left("Invalid Link header"))
    },
    test("Fail to parse links without pointy brackets") {
      val headerValue = "https://example.com/TheBook/chapter2; rel=\"previous\""
      assertTrue(Header.Link.parse(headerValue) == Left("Invalid Link header"))
    },
    test("Parse links with multiple parameters") {
      val headerValue = "<https://example.com/TheBook/chapter2>; rel=\"previous\"; title=\"previous chapter\""
      val uri         = URL.decode("https://example.com/TheBook/chapter2").getOrElse(throw new Exception("Invalid URL"))
      assertTrue(
        Header.Link.parse(headerValue) == Right(
          Header.Link(uri, Map("rel" -> "previous", "title" -> "previous chapter")),
        ),
      )
    },
    test("Parse links with multiple parameters and spaces") {
      val headerValue = "<https://example.com/TheBook/chapter2>; rel=\"previous\"; title=\"previous chapter\""
      val uri         = URL.decode("https://example.com/TheBook/chapter2").getOrElse(throw new Exception("Invalid URL"))
      assertTrue(
        Header.Link.parse(headerValue) == Right(
          Header.Link(uri, Map("rel" -> "previous", "title" -> "previous chapter")),
        ),
      )
    },
    test("Parse unquoted parameters") {
      val headerValue = "<https://example.com/TheBook/chapter2>; rel=previous; title=previous chapter"
      val uri         = URL.decode("https://example.com/TheBook/chapter2").getOrElse(throw new Exception("Invalid URL"))
      assertTrue(
        Header.Link.parse(headerValue) == Right(
          Header.Link(uri, Map("rel" -> "previous", "title" -> "previous chapter")),
        ),
      )
    },
  )
}
