/*---------------------------------------------------------
 * OpenERP base library
 *---------------------------------------------------------*/

openerp.base.views = function(openerp) {

openerp.base.ActionManager = openerp.base.Controller.extend({
// process all kind of actions
    init: function(session, element_id) {
        this._super(session, element_id);
        this.viewmanager = null;
    },
    /**
     * Process an action
     * Supported actions: act_window
     */
    do_action: function(action) {
        // instantiate the right controllers by understanding the action
        if(action.type == "ir.actions.act_window") {
            if (this.viewmanager) {
                this.viewmanager.stop();
            }
            this.viewmanager = new openerp.base.ViewManager(this.session,this.element_id);
            this.viewmanager.do_action_window(action);
            this.viewmanager.start();
        }
    }
});

/**
 * Registry for all the main views
 */
openerp.base.views = new openerp.base.Registry();

openerp.base.ViewManager =  openerp.base.Controller.extend({
    init: function(session, element_id) {
        this._super(session, element_id);
        this.action = null;
        this.dataset = null;
        this.searchview = null;
        this.active_view = null;
        this.views = {};
    },
    start: function() {
    },
    /**
     * Asks the view manager to switch visualization mode.
     *
     * @param {String} view_type type of view to display
     * @returns {jQuery.Deferred} new view loading promise
     */
    on_mode_switch: function(view_type) {
        var view_promise;
        this.active_view = view_type;
        var view = this.views[view_type];
        if (!view.controller) {
            // Lazy loading of views
            var controller = new (openerp.base.views.get_object(view_type))(
                this.session, this.element_id + "_view_" + view_type, this.dataset, view.view_id);
            view_promise = controller.start();
            this.views[view_type].controller = controller;
        }

        if (view.controller.searchable === false) {
            this.searchview.hide();
        } else {
            this.searchview.show();
        }

        this.$element
            .find('.views-switchers button').removeAttr('disabled')
            .filter('[data-view-type="' + view_type + '"]')
            .attr('disabled', true);

        for (var i in this.views) {
            if (this.views[i].controller) {
                if (i === view_type) {
                    this.views[i].controller.do_show();
                } else {
                    this.views[i].controller.do_hide();
                }
            }
        }
        return view_promise;
    },
    /**
     * Extract search view defaults from the current action's context.
     *
     * These defaults are of the form {search_default_*: value}
     *
     * @returns {Object} a clean defaults mapping of {field_name: value}
     */
    search_defaults: function () {
        var defaults = {};
        _.each(this.action.context, function (value, key) {
            var match = /^search_default_(.*)$/.exec(key);
            if (match) {
                defaults[match[1]] = value;
            }
        });
        return defaults;
    },
    /**
     * Sets up the current viewmanager's search view.
     *
     * @param action the action being executed
     * @returns {jQuery.Deferred} search view startup deferred
     */
    setup_search_view:function (action) {
        var self = this;
        if (this.searchview) {
            this.searchview.stop();
        }
        var view_id = action.search_view_id ? action.search_view_id[0] || false : false;

        this.searchview = new openerp.base.SearchView(this.session, this.element_id + "_search", this.dataset, view_id, this.search_defaults());
        this.searchview.on_search.add(function() {
            self.views[self.active_view].controller.do_search.apply(self, arguments);
        });
        return this.searchview.start();
    },
    do_action_window: function(action) {
        var self = this;
        this.action = action;
        this.dataset = new openerp.base.DataSet(this.session, action.res_model);
        this.dataset.start();

        this.$element.html(QWeb.render("ViewManager", {"prefix": this.element_id, views: action.views}));

        var searchview_loaded = this.setup_search_view(action);

        this.$element.find('.oe_vm_switch button').click(function() {
            self.on_mode_switch($(this).data('view-type'));
        });
        _.each(action.views, function(view) {
            self.views[view[1]] = { view_id: view[0], controller: null };
        });

        // switch to the first one in sequence
        var inital_view_loaded = this.on_mode_switch(action.views[0][1]);

        if (action['auto_search']) {
            $.when(searchview_loaded, inital_view_loaded)
                .then(this.searchview.do_search);
        }
    },
    // create when root, also add to parent when o2m
    on_create: function() {
    },
    on_remove: function() {
    },
    on_edit: function() {
    },
    /**
     * Called when one of the view want to execute an action
     */
    on_action: function(action) {
    }
});

openerp.base.ViewManagerRoot = openerp.base.ViewManager.extend({
// Extends view manager
});

openerp.base.ViewManagerUsedAsAMany2One = openerp.base.ViewManager.extend({
// Extends view manager
});

openerp.base.BaseWidget = openerp.base.Controller.extend({
    /**
     * The name of the QWeb template that will be used for rendering. Must be redifined
     * in subclasses or the render() method can not be used.
     * 
     * @type string
     */
    template: null,
    /**
     * The prefix used to generate an id automatically. Should be redifined in subclasses.
     * If it is not defined, a default identifier will be used.
     * 
     * @type string
     */
    identifier_prefix: 'generic-identifier',
    /**
 * Base class for widgets. Handle rendering (based on a QWeb template), identifier
 * generation, parenting and destruction of the widget.
     * Contructor. Also initialize the identifier.
     * 
     * @params {openerp.base.search.BaseWidget} parent The parent widget.
     */
    init: function (parent) {
        this.children = [];
        this.parent = null;
        this.set_parent(parent);
        this.make_id(this.identifier_prefix);
    },
    /**
     * Sets and returns a globally unique identifier for the widget.
     *
     * If a prefix is appended, the identifier will be appended to it.
     *
     * @params sections prefix sections, empty/falsy sections will be removed
     */
    make_id: function () {
        this.element_id = _.uniqueId(_.toArray(arguments).join('_'));
        return this.element_id;
    },
    /**
     * "Starts" the widgets. Called at the end of the rendering, this allows
     * to get a jQuery object referring to the DOM ($element attribute).
     */
    start: function () {
        this._super();
        var tmp = document.getElementById(this.element_id);
        this.$element = tmp ? $(tmp) : null;
    },
    /**
     * "Stops" the widgets. Called when the view destroys itself, this
     * lets the widgets clean up after themselves.
     */
    stop: function () {
        var tmp_children = this.children;
        this.children = [];
        _.each(tmp_children, function(x) {
            x.stop();
        });
        if(this.$element != null) {
            this.$element.remove();
        }
        this.set_parent(null);
        this._super();
    },
    /**
     * Set the parent of this component, also unregister the previous parent if there
     * was one.
     * 
     * @param {openerp.base.BaseWidget} parent The new parent.
     */
    set_parent: function(parent) {
        if(this.parent) {
            this.parent.children = _.without(this.parent.children, this);
        }
        this.parent = parent;
        if(this.parent) {
            parent.children.push(this);
        }
    },
    /**
     * Render the widget. This.template must be defined.
     * The content of the current object is passed as context to the template.
     * 
     * @param {object} additional Additional context arguments to pass to the template.
     */
    render: function (additional) {
        return QWeb.render(this.template, _.extend({}, this, additional != null ? additional : {}));
    }
});

openerp.base.views.add('calendar', 'openerp.base.CalendarView');
openerp.base.CalendarView = openerp.base.Controller.extend({
    start: function () {
        this._super();
        this.$element.append('Calendar view');
    },
    do_show: function () {
        this.$element.show();
    },
    do_hide: function () {
        this.$element.hide();
    }
});

openerp.base.views.add('gantt', 'openerp.base.GanttView');
openerp.base.GanttView = openerp.base.Controller.extend({
    start: function () {
        this._super();
        this.$element.append('Gantt view');
    },
    do_show: function () {
        this.$element.show();
    },
    do_hide: function () {
        this.$element.hide();
    }
});

openerp.base.views.add('tree', 'openerp.base.TreeView');
openerp.base.TreeView = openerp.base.Controller.extend({
/**
 * Genuine tree view (the one displayed as a tree, not the list)
 */
    start: function () {
        this._super();
        this.$element.append('Tree view');
    },
    do_show: function () {
        this.$element.show();
    },
    do_hide: function () {
        this.$element.hide();
    }
});

openerp.base.views.add('graph', 'openerp.base.GraphView');
openerp.base.GraphView = openerp.base.Controller.extend({
    start: function () {
        this._super();
        this.$element.append('Graph view');
    },
    do_show: function () {
        this.$element.show();
    },
    do_hide: function () {
        this.$element.hide();
    }
});

openerp.base.ProcessView = openerp.base.Controller.extend({
});

openerp.base.HelpView = openerp.base.Controller.extend({
});

};

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