// Copyright (c) Microsoft. All rights reserved. Licensed under the MIT license. See LICENSE file in the project root for full license information.
var common = require('./common.js');
var classCategory = 'class';
var namespaceCategory = 'ns';

exports.transform = function (model)  {

  if (!model) return null;

  langs = model.langs;
  handleItem(model, model._gitContribute, model._gitUrlPattern);
  if (model.children) {
    model.children.forEach(function (item) {
      handleItem(item, model._gitContribute, model._gitUrlPattern);
    });
  }

  if (model.type) {
    switch (model.type.toLowerCase()) {
      case 'namespace':
        model.isNamespace = true;
        if (model.children) groupChildren(model, namespaceCategory);
        break;
      case 'class':
      case 'interface':
      case 'struct':
      case 'delegate':
      case 'enum':
        model.isClass = true;
        if (model.children) groupChildren(model, classCategory);
        model[getTypePropertyName(model.type)] = true;
        handleNamespace(model);
        break;
      default:
        break;
    }
  }

  return model;
}

exports.getBookmarks = function (model, ignoreChildren)  {
  if (!model || !model.type || model.type.toLowerCase() === "namespace") return null;

  var bookmarks = {};

  if (typeof ignoreChildren == 'undefined' || ignoreChildren === false) {
    if (model.children) {
      model.children.forEach(function (item) {
        bookmarks[item.uid] = common.getHtmlId(item.uid);
        if (item.overload && item.overload.uid) {
          bookmarks[item.overload.uid] = common.getHtmlId(item.overload.uid);
        }
      });
    }
  }

  // Reference's first level bookmark should have no anchor
  bookmarks[model.uid] = "";
  return bookmarks;
}

exports.groupChildren = groupChildren;
exports.getTypePropertyName = getTypePropertyName;
exports.getCategory = getCategory;

function groupChildren(model, category) {
  if (!model || !model.type) {
    return;
  }
  var typeChildrenItems = getDefinitions(category);
  var grouped = {};

  model.children.forEach(function (c) {
    if (c.isEii) {
      var type = "eii";
    } else {
      var type = c.type.toLowerCase();
    }
    if (!grouped.hasOwnProperty(type)) {
      grouped[type] = [];
    }
    // special handle for field
    if (type === "field" && c.syntax) {
      c.syntax.fieldValue = c.syntax.return;
      c.syntax.return = undefined;
    }
    // special handle for property
    if (type === "property" && c.syntax) {
      c.syntax.propertyValue = c.syntax.return;
      c.syntax.return = undefined;
    }
    // special handle for event
    if (type === "event" && c.syntax) {
      c.syntax.eventType = c.syntax.return;
      c.syntax.return = undefined;
    }
    grouped[type].push(c);
  })

  var children = [];
  for (var key in typeChildrenItems) {
    if (typeChildrenItems.hasOwnProperty(key) && grouped.hasOwnProperty(key)) {
      var typeChildrenItem = typeChildrenItems[key];
      var items = grouped[key];
      if (items && items.length > 0) {
        var item = {};
        for (var itemKey in typeChildrenItem) {
          if (typeChildrenItem.hasOwnProperty(itemKey)){
            item[itemKey] = typeChildrenItem[itemKey];
          }
        }
        item.children = items;
        children.push(item);
      }
    }
  }

  model.children = children;
}

function getTypePropertyName(type) {
  if (!type) {
    return undefined;
  }
  var loweredType = type.toLowerCase();
  var definition = getDefinition(loweredType);
  if (definition) {
    return definition.typePropertyName;
  }

  return undefined;
}

function getCategory(type) {
  var classItems = getDefinitions(classCategory);
  if (classItems.hasOwnProperty(type)) {
    return classCategory;
  }

  var namespaceItems = getDefinitions(namespaceCategory);
  if (namespaceItems.hasOwnProperty(type)) {
    return namespaceCategory;
  }
  return undefined;
}

function getDefinition(type) {
  var classItems = getDefinitions(classCategory);
  if (classItems.hasOwnProperty(type)) {
    return classItems[type];
  }
  var namespaceItems = getDefinitions(namespaceCategory);
  if (namespaceItems.hasOwnProperty(type)) {
    return namespaceItems[type];
  }
  return undefined;
}

function getDefinitions(category) {
  var namespaceItems = {
    "class":        { inClass: true,        typePropertyName: "inClass",        id: "classes" },
    "struct":       { inStruct: true,       typePropertyName: "inStruct",       id: "structs" },
    "interface":    { inInterface: true,    typePropertyName: "inInterface",    id: "interfaces" },
    "enum":         { inEnum: true,         typePropertyName: "inEnum",         id: "enums" },
    "delegate":     { inDelegate: true,     typePropertyName: "inDelegate",     id: "delegates" }
  };
  var classItems = {
    "constructor":  { inConstructor: true,  typePropertyName: "inConstructor",  id: "constructors" },
    "field":        { inField: true,        typePropertyName: "inField",        id: "fields" },
    "property":     { inProperty: true,     typePropertyName: "inProperty",     id: "properties" },
    "method":       { inMethod: true,       typePropertyName: "inMethod",       id: "methods" },
    "event":        { inEvent: true,        typePropertyName: "inEvent",        id: "events" },
    "operator":     { inOperator: true,     typePropertyName: "inOperator",     id: "operators" },
    "eii":          { inEii: true,          typePropertyName: "inEii",          id: "eii" }
  };
  if (category === 'class') {
    return classItems;
  }
  if (category === 'ns') {
    return namespaceItems;
  }
  console.err("category '" + category + "' is not valid.");
  return undefined;
}

// reserve "namespace" of string for backward compatibility
// will replace "namespace" with "namespaceExpanded" of object
function handleNamespace(model) {
    model.namespaceExpanded = model.namespace;
    if (model.namespaceExpanded) {
        model.namespace = model.namespaceExpanded.uid;
    }
}

function handleItem(vm, gitContribute, gitUrlPattern) {
  // get contribution information
  vm.docurl = common.getImproveTheDocHref(vm, gitContribute, gitUrlPattern);
  vm.sourceurl = common.getViewSourceHref(vm, null, gitUrlPattern);

  // set to null incase mustache looks up
  vm.summary = vm.summary || null;
  vm.remarks = vm.remarks || null;
  vm.conceptual = vm.conceptual || null;
  vm.syntax = vm.syntax || null;
  vm.implements = vm.implements || null;
  vm.example = vm.example || null;
  common.processSeeAlso(vm);

  // id is used as default template's bookmark
  vm.id = common.getHtmlId(vm.uid);
  if (vm.overload && vm.overload.uid) {
    vm.overload.id = common.getHtmlId(vm.overload.uid);
  }

  if (vm.supported_platforms) {
      vm.supported_platforms = transformDictionaryToArray(vm.supported_platforms);
  }

  if (vm.requirements) {
      var type = vm.type.toLowerCase();
      if (type == "method") {
          vm.requirements_method = transformDictionaryToArray(vm.requirements);
      } else {
          vm.requirements = transformDictionaryToArray(vm.requirements);
      }
  }

  if (vm && langs) {
      if (shouldHideTitleType(vm)) {
          vm.hideTitleType = true;
      } else {
          vm.hideTitleType = false;
      }

      if (shouldHideSubtitle(vm)) {
          vm.hideSubtitle = true;
      } else {
          vm.hideSubtitle = false;
      }
  }

  function shouldHideTitleType(vm) {
      var type = vm.type.toLowerCase();
      return ((type === 'namespace' && langs.length == 1 && (langs[0] === 'objectivec' || langs[0] === 'java' || langs[0] === 'c'))
      || ((type === 'class' || type === 'enum') && langs.length == 1 && langs[0] === 'c'));
  }

  function shouldHideSubtitle(vm) {
      var type = vm.type.toLowerCase();
      return (type === 'class' || type === 'namespace') && langs.length == 1 && langs[0] === 'c';
  }

  function transformDictionaryToArray(dic) {
    var array = [];
    for(var key in dic) {
        if (dic.hasOwnProperty(key)) {
            array.push({"name": key, "value": dic[key]})
        }
    }

    return array;
  }
}