//= require jquery
//= require jquery_ujs
//= require_tree .

"use strict";

var _Lobsters = Class.extend({
  curUser: null,

  storyDownvoteReasons: { <%= Vote::STORY_REASONS.map{|k,v|
      "#{k.inspect}: #{v.inspect}" }.join(", ") %> },
  commentDownvoteReasons: { <%= Vote::COMMENT_REASONS.map{|k,v|
      "#{k.inspect}: #{v.inspect}" }.join(", ") %> },

  upvote: function(voterEl) {
    Lobsters.vote("story", voterEl, 1);
  },
  downvote: function(voterEl) {
    Lobsters._showDownvoteWhyAt("story", voterEl, function(k) {
      Lobsters.vote("story", voterEl, -1, k); });
  },

  upvoteComment: function(voterEl) {
    Lobsters.vote("comment", voterEl, 1);
  },
  downvoteComment: function(voterEl) {
    Lobsters._showDownvoteWhyAt("comment", voterEl, function(k) {
      Lobsters.vote("comment", voterEl, -1, k); });
  },

  _showDownvoteWhyAt: function(thingType, voterEl, onChooseWhy) {
    if (!Lobsters.curUser)
      return Lobsters.bounceToLogin();

    var li = $(voterEl).closest(".story, .comment");
    if (li.hasClass("downvoted")) {
      /* already upvoted, neutralize */
      Lobsters.vote(thingType, voterEl, -1, null);
      return;
    }

    if ($("#downvote_why"))
      $("#downvote_why").remove();
    if ($("#downvote_why_shadow"))
      $("#downvote_why_shadow").remove();

    var sh = $("<div id=\"downvote_why_shadow\"></div>");
    $(voterEl).after(sh);
    sh.click(function() {
      $("#downvote_why_shadow").remove();
      $("#downvote_why").remove();
    });

    var d = $("<div id=\"downvote_why\"></div>");

    var reasons;
    if (thingType == "comment")
      reasons = Lobsters.commentDownvoteReasons;
    else
      reasons = Lobsters.storyDownvoteReasons;

    $.each(reasons, function(k, v) {
      var a = $("<a href=\"#\"" + (k == "" ? " class=\"cancelreason\"" : "") +
        ">" + v + "</a>");

      a.click(function() {
        $("#downvote_why").remove();
        $("#downvote_why_shadow").remove();

        if (k != "")
          onChooseWhy(k);

        return false;
      });

      d.append(a);
    });

    $(voterEl).after(d);

    d.position({
      my: "left top",
      at: "left bottom",
      offset: "-2 -2",
      of: $(voterEl),
      collision: "none",
    });
  },

  vote: function(thingType, voterEl, point, reason) {
    if (!Lobsters.curUser)
      return Lobsters.bounceToLogin();

    var li = $(voterEl).closest(".story, .comment");
    var scoreDiv = li.find("div.score").get(0);
    var score = parseInt(scoreDiv.innerHTML);
    var action = "";

    if (li.hasClass("upvoted") && point > 0) {
      /* already upvoted, neutralize */
      li.removeClass("upvoted");
      score--;
      action = "unvote";
    }
    else if (li.hasClass("downvoted") && point < 0) {
      /* already downvoted, neutralize */
      li.removeClass("downvoted");
      score++;
      action = "unvote";
    }
    else if (point > 0) {
      if (li.hasClass("downvoted"))
        /* flip flop */
        score++;

      li.removeClass("downvoted").addClass("upvoted");
      score++;
      action = "upvote";
    }
    else if (point < 0) {
      if (li.hasClass("upvoted"))
        /* flip flop */
        score--;

      li.removeClass("upvoted").addClass("downvoted");
      score--;
      action = "downvote";
    }

    scoreDiv.innerHTML = score;

    if (action == "upvote" || action == "unvote")
      li.find(".reason").html("");
    else if (action == "downvote" && thingType == "comment")
      li.find(".reason").html("(" +
        Lobsters.commentDownvoteReasons[reason].toLowerCase() + ")");

    $.post("/" + (thingType == "story" ? "stories" : thingType + "s") + "/" +
      li.attr("data-shortid") + "/" +
      action, { reason: reason });
  },

  postComment: function(form) {
    $.post($(form).attr("action"), $(form).serializeArray(), function(data) {
      $(form).closest('.comment').replaceWith($.parseHTML(data));
    });
  },

  previewComment: function(form) {
    var params = $(form).serializeArray();
    params.push({"name": "preview", "value": "true"});
    $.post($(form).attr("action"), params, function(data) {
      $(form).closest('.comment').replaceWith($.parseHTML(data));
    });
  },

  previewStory: function(form) {
    $("#inside").load("/stories/preview", $(form).serializeArray());
  },

  moderateStory: function(link) {
    var reason = prompt("Moderation reason:");
    if (reason == null || reason == "")
      return false;

    var link = $(link);

    /* $.rails.handleMethod() */
    var href = $.rails.href(link),
      method = link.data('method'),
      target = link.attr('target'),
      csrf_token = $("meta[name=csrf-token]").attr("content"),
      csrf_param = $("meta[name=csrf-param]").attr("content"),
      form = $("<form method=\"post\" action=\"" + href + "\"></form>"),
      metadata_input = "<input name=\"_method\" value=\"" + method +
        "\" type=\"hidden\" />";

    if (csrf_param !== undefined && csrf_token !== undefined)
      metadata_input += "<input name=\"" + csrf_param + "\" value=\"" +
        csrf_token + "\" type=\"hidden\" />";

    if (target)
      form.attr("target", target);

    var r = $("<input type=\"hidden\" name=\"reason\" />");
    r.val(reason);
    form.append(r);

    form.hide().append(metadata_input).appendTo('body');
    form.submit();

    return false;
  },

  fetchURLTitle: function(button, url_field, title_field) {
    if (url_field.val() == "")
      return;

    var old_value = button.val();
    button.prop("disabled", true);
    button.val("Fetching...");

    $.post("/stories/fetch_url_title", {
      fetch_url: url_field.val(),
    })
    .success(function(data) {
      if (data && data.title)
        title_field.val(data.title.substr(0,
          title_field.maxLength));

      button.val(old_value);
      button.prop("disabled", false);
    })
    .error(function() {
      button.val(old_value);
      button.prop("disabled", false);
    });
  },

  bounceToLogin: function() {
    document.location = "/login?return=" +
      encodeURIComponent(document.location);
  },
});

var Lobsters = new _Lobsters();

$(document).ready(function() {
  $(".comment a.downvoter").click(function() {
    Lobsters.downvoteComment(this);
    return false;
  });
  $(".comment a.upvoter").click(function() {
    Lobsters.upvoteComment(this);
    return false;
  });

  $("li.story a.downvoter").click(function() {
    Lobsters.downvote(this);
    return false;
  });
  $("li.story a.upvoter").click(function() {
    Lobsters.upvote(this);
    return false;
  });

  $("li.story a.mod_story_link").click(function() {
    return Lobsters.moderateStory(this);
  }),

  $(document).on("click", "a.comment_replier", function() {
    if (!Lobsters.curUser) {
      Lobsters.bounceToLogin();
      return false;
    }

    var comment = $(this).closest(".comment");
    var replies = comment.nextAll(".comments").first();
    $.get("/comments/" + comment.attr("data-shortid") + "/reply",
    function(data) {
      var reply = $($.parseHTML(data));
      replies.prepend(reply);
      reply.find("textarea").focus();
    });

    return false;
  });

  $(document).on("click", "button.comment-cancel", function() {
    $(this).closest(".comment").remove();
  });

  $(document).on("click", "a.comment_editor", function() {
    var comment = $(this).closest(".comment");
    $.get("/comments/" + comment.attr("data-shortid") + "/edit",
    function(data) {
      comment.replaceWith($.parseHTML(data));
    });
  });

  $(document).on("click", "a.comment_deletor", function() {
    if (confirm("Are you sure you want to delete this comment?")) {
      var li = $(this).closest(".comment");
      $.post("/comments/" + $(li).attr("data-shortid") + "/delete",
      function(d) {
        $(li).replaceWith(d);
      });
    }
  });

  $(document).on("click", "a.comment_undeletor", function() {
    if (confirm("Are you sure you want to undelete this comment?")) {
      var li = $(this).closest(".comment");
      $.post("/comments/" + $(li).attr("data-shortid") + "/undelete",
      function(d) {
        $(li).replaceWith(d);
      });
    }
  });

  $("#story_tags_a").select2({
    formatSelection: function(what) {
      return what.id;
    },
    matcher: function(term, text) {
      return text.toUpperCase().indexOf(term.toUpperCase()) == 0;
    }
  });

  $(document).on("click", "div.markdown_help_toggler .markdown_help_label",
  function() {
    $(this).parents("div.markdown_help_toggler").first().
      children(".markdown_help").toggle();
  });

  $(document).on("click", "button.comment-post", function() {
    Lobsters.postComment($(this).parents("form").first());
  });

  $(document).on("click", "button.comment-preview", function() {
    Lobsters.previewComment($(this).parents("form").first());
  });

  $(document).on("click", "button.story-preview", function() {
    Lobsters.previewStory($(this).parents("form").first());
  });

  $(document).on("blur", "#story_url", function() {
    /* if the url looks like a pdf, assign the pdf tag */
    if ($("#story_url").val().match(/\.pdf$/i)) {
      var ta = $("#story_tags_a").data("select2");
      if (ta.getVal().indexOf("pdf") < 0)
        ta.addSelectedChoice({ id: "pdf" });
    }
    /* if the url looks like a video site url, assign the video tag */
    else if ($("#story_url").val().match(/[\/\.]((youtube|vimeo)\.com|youtu\.be)\//i)) {
      var ta = $("#story_tags_a").data("select2");
      if (ta.getVal().indexOf("video") < 0)
        ta.addSelectedChoice({ id: "video" });
    }
    /* if the url looks like a slide sharing site url, assign the slides tag */
    else if ($("#story_url").val().match(/[\/\.](slideshare\.net)\//i)) {
      var ta = $("#story_tags_a").data("select2");
      if (ta.getVal().indexOf("slides") < 0)
        ta.addSelectedChoice({ id: "slides" });
    }
  });

  $(document).on("blur", "#story_title", function() {
    var m;
    if (m = $("#story_title").val().match(/^(show|ask) lobste\.?rs:? (.+)$/i)) {
      var ta = $("#story_tags_a").data("select2");
      if (ta.getVal().indexOf(m[1].toLowerCase()) < 0)
        ta.addSelectedChoice({ id: m[1].toLowerCase() });
      $("#story_title").val(m[2]);
    }
  });

  $(document).on("click", "#story_guidelines_toggler", function() {
    $("#story_guidelines").toggle();
    return false;
  });
});