/// <reference path="../svgFactory.ts" />
/// <reference path="../utils.ts" />
/// <reference path="../constants.ts" />

module ag.grid {

    var svgFactory = SvgFactory.getInstance();
    var utils = Utils;
    var constants = Constants;

    export function groupCellRendererFactory(gridOptionsWrapper: GridOptionsWrapper,
                                    selectionRendererFactory: SelectionRendererFactory,
                                    expressionService: ExpressionService) {

        return function groupCellRenderer(params: any) {

            var eGroupCell = document.createElement('span');
            var node = params.node;

            var cellExpandable = node.group && !node.footer;
            if (cellExpandable) {
                addExpandAndContract(eGroupCell, params);
            }

            var checkboxNeeded = params.colDef && params.colDef.cellRenderer && params.colDef.cellRenderer.checkbox && !node.footer;
            if (checkboxNeeded) {
                var eCheckbox = selectionRendererFactory.createSelectionCheckbox(node, params.rowIndex);
                eGroupCell.appendChild(eCheckbox);
            }

            if (params.colDef && params.colDef.cellRenderer && params.colDef.cellRenderer.innerRenderer) {
                createFromInnerRenderer(eGroupCell, params, params.colDef.cellRenderer.innerRenderer);
            } else if (node.footer) {
                createFooterCell(eGroupCell, params);
            } else if (node.group) {
                createGroupCell(eGroupCell, params);
            } else {
                createLeafCell(eGroupCell, params);
            }

            // only do this if an indent - as this overwrites the padding that
            // the theme set, which will make things look 'not aligned' for the
            // first group level.
            var suppressPadding = params.colDef && params.colDef.cellRenderer
                && params.colDef.cellRenderer.suppressPadding;
            if (!suppressPadding && (node.footer || node.level > 0)) {
                var paddingFactor: any;
                if (params.colDef && params.colDef.cellRenderer && params.colDef.cellRenderer.padding >= 0) {
                    paddingFactor = params.colDef.cellRenderer.padding;
                } else {
                    paddingFactor = 10;
                }
                var paddingPx = node.level * paddingFactor;
                if (node.footer) {
                    paddingPx += 10;
                } else if (!node.group) {
                    paddingPx += 5;
                }
                eGroupCell.style.paddingLeft = paddingPx + 'px';
            }

            return eGroupCell;
        };

        function addExpandAndContract(eGroupCell: any, params: any) {

            var eExpandIcon = createGroupExpandIcon(true);
            var eContractIcon = createGroupExpandIcon(false);
            eGroupCell.appendChild(eExpandIcon);
            eGroupCell.appendChild(eContractIcon);

            eExpandIcon.addEventListener('click', expandOrContract);
            eContractIcon.addEventListener('click', expandOrContract);
            eGroupCell.addEventListener('dblclick', expandOrContract);

            showAndHideExpandAndContract(eExpandIcon, eContractIcon, params.node.expanded);

            // if parent cell was passed, then we can listen for when focus is on the cell,
            // and then expand / contract as the user hits enter or space-bar
            if (params.eGridCell) {
                params.eGridCell.addEventListener('keydown', function(event: any) {
                    if (utils.isKeyPressed(event, constants.KEY_ENTER)) {
                        expandOrContract();
                        event.preventDefault();
                    }
                });
            }

            function expandOrContract() {
                expandGroup(eExpandIcon, eContractIcon, params);
            }
        }

        function showAndHideExpandAndContract(eExpandIcon: any, eContractIcon: any, expanded: any) {
            utils.setVisible(eExpandIcon, !expanded);
            utils.setVisible(eContractIcon, expanded);
        }

        function createFromInnerRenderer(eGroupCell: any, params: any, renderer: any) {
            utils.useRenderer(eGroupCell, renderer, params);
        }

        function getRefreshFromIndex(params: any) {
            if (gridOptionsWrapper.isGroupIncludeFooter()) {
                return params.rowIndex;
            } else {
                return params.rowIndex + 1;
            }
        }

        function expandGroup(eExpandIcon: any, eContractIcon: any, params: any) {
            params.node.expanded = !params.node.expanded;
            var refreshIndex = getRefreshFromIndex(params);
            params.api.onGroupExpandedOrCollapsed(refreshIndex);
            showAndHideExpandAndContract(eExpandIcon, eContractIcon, params.node.expanded);
        }

        function createGroupExpandIcon(expanded: any) {
            var eIcon: any;
            if (expanded) {
                eIcon = utils.createIcon('groupContracted', gridOptionsWrapper, null, svgFactory.createArrowRightSvg);
            } else {
                eIcon = utils.createIcon('groupExpanded', gridOptionsWrapper, null, svgFactory.createArrowDownSvg);
            }
            utils.addCssClass(eIcon, 'ag-group-expand');
            return eIcon;
        }

        // creates cell with 'Total {{key}}' for a group
        function createFooterCell(eGroupCell: any, params: any) {
            var footerValue: string;
            var groupName = getGroupName(params);
            if (params.colDef && params.colDef.cellRenderer && params.colDef.cellRenderer.footerValueGetter) {
                var footerValueGetter = params.colDef.cellRenderer.footerValueGetter;
                // params is same as we were given, except we set the value as the item to display
                var paramsClone: any = utils.cloneObject(params);
                paramsClone.value = groupName;
                if (typeof footerValueGetter === 'function') {
                    footerValue = footerValueGetter(paramsClone);
                } else if (typeof footerValueGetter === 'string') {
                    footerValue = expressionService.evaluate(footerValueGetter, paramsClone);
                } else {
                    console.warn('ag-Grid: footerValueGetter should be either a function or a string (expression)');
                }
            } else {
                footerValue = 'Total ' + groupName;
            }

            var eText = document.createTextNode(footerValue);
            eGroupCell.appendChild(eText);
        }

        function getGroupName(params: any) {
            var cellRenderer = params.colDef.cellRenderer;
            if (cellRenderer && cellRenderer.keyMap
                && typeof cellRenderer.keyMap === 'object' && params.colDef.cellRenderer !== null) {
                var valueFromMap = cellRenderer.keyMap[params.node.key];
                if (valueFromMap) {
                    return valueFromMap;
                } else {
                    return params.node.key;
                }
            } else {
                return params.node.key;
            }
        }

        // creates cell with '{{key}} ({{childCount}})' for a group
        function createGroupCell(eGroupCell: any, params: any) {
            var groupName = getGroupName(params);

            var colDefOfGroupedCol = params.api.getColumnDef(params.node.field);
            if (colDefOfGroupedCol && typeof colDefOfGroupedCol.cellRenderer === 'function') {
                params.value = groupName;
                utils.useRenderer(eGroupCell, colDefOfGroupedCol.cellRenderer, params);
            } else {
                eGroupCell.appendChild(document.createTextNode(groupName));
            }

            // only include the child count if it's included, eg if user doing custom aggregation,
            // then this could be left out, or set to -1, ie no child count
            var suppressCount = params.colDef.cellRenderer && params.colDef.cellRenderer.suppressCount;
            if (!suppressCount && params.node.allChildrenCount >= 0) {
                eGroupCell.appendChild(document.createTextNode(" (" + params.node.allChildrenCount + ")"));
            }
        }

        // creates cell with '{{key}} ({{childCount}})' for a group
        function createLeafCell(eParent: any, params: any) {
            if (params.value) {
                var eText = document.createTextNode(' ' + params.value);
                eParent.appendChild(eText);
            }
        }
    }
}