//= 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).parents("li").first();
		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).parents("li").first();
		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") + "/" +
      $(voterEl).parents("li").first().attr("data-shortid") + "/" +
      action, { reason: reason });
	},

	postComment: function(form) {
		$(form).parent().load($(form).attr("action"), $(form).serializeArray());
	},

	previewComment: function(form) {
		$(form).parent().load($(form).attr("action").replace(/(post|update)/,
      "preview"), $(form).serializeArray());
	},
	
  previewStory: function(form) {
		$("#inside").load("/stories/preview", $(form).serializeArray());
	},

	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() {
	$("li.comment a.downvoter").click(function() {
		Lobsters.downvoteComment(this);
		return false;
	});
	$("li.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;
	});

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

		var box = $(this).parents("li.comment").first().find("div.comment_reply").
      first();
    
    box.html($("#comment_form").clone());
    box.find("ol").remove();

    box.find("button.comment-preview").after("&nbsp;\n&nbsp;<button class=\"comment-cancel\" name=\"button\" type=\"button\">Cancel</button>");

    box.find("textarea").focus();

    var el = $("<input type=\"hidden\" " +
      "name=\"parent_comment_short_id\" value=\"" +
      $(this).parents("li.comment").first().attr("data-shortid") + "\">");

    box.find("form").append(el);

    return false;
  });

  $("button.comment-cancel").live("click", function() {
    $(this).parents("div.comment_reply form").remove();
  });

  $("a.comment_editor").live("click", function() {
		var li = $(this).parents("li.comment").first();
    li.load("/comments/" + $(li).attr("data-shortid") + "/edit",
      { "edit": 1 });
  });
  
  $("a.comment_deletor").live("click", function() {
    if (confirm("Are you sure you want to delete this comment?")) {
      var li = $(this).parents("li.comment").first();
      $.post("/comments/" + $(li).attr("data-shortid") + "/delete",
      function(d) {
        $(li).replaceWith(d);
      });
    }
  });
  
  $("a.comment_undeletor").live("click", function() {
    if (confirm("Are you sure you want to undelete this comment?")) {
      var li = $(this).parents("li.comment").first();
      $.post("/comments/" + $(li).attr("data-shortid") + "/undelete",
      function(d) {
        $(li).replaceWith(d);
      });
    }
  });

  $("#story_tags_a").select2({
    formatSelection: function(what) {
      return what.id;
    }
  });

  /* TODO: jquery says live() is slow and bad, what is supposed to be used? */
  $("div.markdown_help_toggler .markdown_help_label").live("click",
  function() {
    $(this).parents("div.markdown_help_toggler").first().
      children(".markdown_help").toggle();
  });

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

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