/**
 * Copyright (C) 2009-2011 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * 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 org.fusesource.scalate.console

import java.io.File

import org.fusesource.scalate.RenderContext.captureNodeSeq

import scala.xml.NodeSeq

/**
 * @version $Revision : 1.1 $
 */

object EditLink {

  var idePluginPort = 51235

  def editLink(file: String)(body: => Unit): NodeSeq = editLink(file, None, None)(body)

  def editLink(file: String, line: Option[Int], col: Option[Int])(body: => Unit): NodeSeq = {
    if (file == null) {
      Nil
    } else {
      System.getProperty("scalate.editor", "") match {
        case "textmate" => editLinkTextMate(file, line, col)(body)
        case "ide" => editLinkIdePlugin(file, line, col)(body)
        case "file" => editLinkFileScheme(file, line, col)(body)
        case _ =>
          if (isMacOsx && hasTextMate)
            editLinkTextMate(file, line, col)(body)
          else {
            editLinkFileScheme(file, line, col)(body)
          }
      }
    }
  }

  def editLinkFileScheme(file: String, line: Option[Int], col: Option[Int])(body: => Unit): NodeSeq = {
    val bodyText = captureNodeSeq(body)
    <a href={ "file://" + file } title="Open File" target="_blank">
      { bodyText }
    </a>
  }

  def editLinkTextMate(file: String, line: Option[Int], col: Option[Int])(body: => Unit): NodeSeq = {
    val bodyText = captureNodeSeq(body)
    val href = "txmt://open?url=file://" + file +
      (if (line.isDefined) "&line=" + line.get else "") +
      (if (col.isDefined) "&col=" + col.get else "")

    <a href={ href } title="Open in TextMate">
      { bodyText }
    </a>
  }

  def editLinkIdePlugin(file: String, line: Option[Int], col: Option[Int])(body: => Unit): NodeSeq = {
    val bodyText = captureNodeSeq(body)

    // The Atlassian IDE plugin seems to highlight the line after the actual line number, so lets subtract one
    val lineNumber = if (line.isDefined) {
      val n = line.get
      if (n > 1) n - 1 else 0
    } else 0

    <span>
      { bodyText }<img class="ide-icon tb_right_mid" id={ "ide-" + file.hashCode } title={ bodyText } onclick={ "this.src='http://localhost:" + idePluginPort + "/file?file=" + file + "&line=" + lineNumber + "&id=' + Math.floor(Math.random()*1000);" } alt="Open in IDE" src={ "http://localhost:" + idePluginPort + "/icon" }/>
    </span>
  }

  def isMacOsx = System.getProperty("os.name", "").contains("Mac OS X")

  def hasTextMate = exists("/Applications/TextMate.app") || exists("~/Applications/TextMate.app")

  def exists(fileName: String) = new File(fileName).exists

}