import { inject, computed, h } from 'vue';
import { merge } from 'lodash-unified';
import '../../../../hooks/index.mjs';
import { getRowIdentity } from '../util.mjs';
import { TABLE_INJECTION_KEY } from '../tokens.mjs';
import useEvents from './events-helper.mjs';
import useStyles from './styles-helper.mjs';
import { useNamespace } from '../../../../hooks/use-namespace/index.mjs';

function useRender(props) {
  const parent = inject(TABLE_INJECTION_KEY);
  const ns = useNamespace("table");
  const {
    handleDoubleClick,
    handleClick,
    handleContextMenu,
    handleMouseEnter,
    handleMouseLeave,
    handleCellMouseEnter,
    handleCellMouseLeave,
    tooltipContent,
    tooltipTrigger
  } = useEvents(props);
  const {
    getRowStyle,
    getRowClass,
    getCellStyle,
    getCellClass,
    getSpan,
    getColspanRealWidth
  } = useStyles(props);
  const firstDefaultColumnIndex = computed(() => {
    return props.store.states.columns.value.findIndex(({ type }) => type === "default");
  });
  const getKeyOfRow = (row, index) => {
    const rowKey = parent.props.rowKey;
    if (rowKey) {
      return getRowIdentity(row, rowKey);
    }
    return index;
  };
  const rowRender = (row, $index, treeRowData, expanded = false) => {
    const { tooltipEffect, tooltipOptions, store } = props;
    const { indent, columns } = store.states;
    const rowClasses = getRowClass(row, $index);
    let display = true;
    if (treeRowData) {
      rowClasses.push(ns.em("row", `level-${treeRowData.level}`));
      display = treeRowData.display;
    }
    const displayStyle = display ? null : {
      display: "none"
    };
    return h("tr", {
      style: [displayStyle, getRowStyle(row, $index)],
      class: rowClasses,
      key: getKeyOfRow(row, $index),
      onDblclick: ($event) => handleDoubleClick($event, row),
      onClick: ($event) => handleClick($event, row),
      onContextmenu: ($event) => handleContextMenu($event, row),
      onMouseenter: () => handleMouseEnter($index),
      onMouseleave: handleMouseLeave
    }, columns.value.map((column, cellIndex) => {
      const { rowspan, colspan } = getSpan(row, column, $index, cellIndex);
      if (!rowspan || !colspan) {
        return null;
      }
      const columnData = Object.assign({}, column);
      columnData.realWidth = getColspanRealWidth(columns.value, colspan, cellIndex);
      const data = {
        store: props.store,
        _self: props.context || parent,
        column: columnData,
        row,
        $index,
        cellIndex,
        expanded
      };
      if (cellIndex === firstDefaultColumnIndex.value && treeRowData) {
        data.treeNode = {
          indent: treeRowData.level * indent.value,
          level: treeRowData.level
        };
        if (typeof treeRowData.expanded === "boolean") {
          data.treeNode.expanded = treeRowData.expanded;
          if ("loading" in treeRowData) {
            data.treeNode.loading = treeRowData.loading;
          }
          if ("noLazyChildren" in treeRowData) {
            data.treeNode.noLazyChildren = treeRowData.noLazyChildren;
          }
        }
      }
      const baseKey = `${getKeyOfRow(row, $index)},${cellIndex}`;
      const patchKey = columnData.columnKey || columnData.rawColumnKey || "";
      const tdChildren = cellChildren(cellIndex, column, data);
      const mergedTooltipOptions = column.showOverflowTooltip && merge({
        effect: tooltipEffect
      }, tooltipOptions, column.showOverflowTooltip);
      return h("td", {
        style: getCellStyle($index, cellIndex, row, column),
        class: getCellClass($index, cellIndex, row, column, colspan - 1),
        key: `${patchKey}${baseKey}`,
        rowspan,
        colspan,
        onMouseenter: ($event) => handleCellMouseEnter($event, row, mergedTooltipOptions),
        onMouseleave: handleCellMouseLeave
      }, [tdChildren]);
    }));
  };
  const cellChildren = (cellIndex, column, data) => {
    return column.renderCell(data);
  };
  const wrappedRowRender = (row, $index) => {
    const store = props.store;
    const { isRowExpanded, assertRowKey } = store;
    const { treeData, lazyTreeNodeMap, childrenColumnName, rowKey } = store.states;
    const columns = store.states.columns.value;
    const hasExpandColumn = columns.some(({ type }) => type === "expand");
    if (hasExpandColumn) {
      const expanded = isRowExpanded(row);
      const tr = rowRender(row, $index, void 0, expanded);
      const renderExpanded = parent.renderExpanded;
      if (expanded) {
        if (!renderExpanded) {
          console.error("[Element Error]renderExpanded is required.");
          return tr;
        }
        return [
          [
            tr,
            h("tr", {
              key: `expanded-row__${tr.key}`
            }, [
              h("td", {
                colspan: columns.length,
                class: `${ns.e("cell")} ${ns.e("expanded-cell")}`
              }, [renderExpanded({ row, $index, store, expanded })])
            ])
          ]
        ];
      } else {
        return [[tr]];
      }
    } else if (Object.keys(treeData.value).length) {
      assertRowKey();
      const key = getRowIdentity(row, rowKey.value);
      let cur = treeData.value[key];
      let treeRowData = null;
      if (cur) {
        treeRowData = {
          expanded: cur.expanded,
          level: cur.level,
          display: true
        };
        if (typeof cur.lazy === "boolean") {
          if (typeof cur.loaded === "boolean" && cur.loaded) {
            treeRowData.noLazyChildren = !(cur.children && cur.children.length);
          }
          treeRowData.loading = cur.loading;
        }
      }
      const tmp = [rowRender(row, $index, treeRowData)];
      if (cur) {
        let i = 0;
        const traverse = (children, parent2) => {
          if (!(children && children.length && parent2))
            return;
          children.forEach((node) => {
            const innerTreeRowData = {
              display: parent2.display && parent2.expanded,
              level: parent2.level + 1,
              expanded: false,
              noLazyChildren: false,
              loading: false
            };
            const childKey = getRowIdentity(node, rowKey.value);
            if (childKey === void 0 || childKey === null) {
              throw new Error("For nested data item, row-key is required.");
            }
            cur = { ...treeData.value[childKey] };
            if (cur) {
              innerTreeRowData.expanded = cur.expanded;
              cur.level = cur.level || innerTreeRowData.level;
              cur.display = !!(cur.expanded && innerTreeRowData.display);
              if (typeof cur.lazy === "boolean") {
                if (typeof cur.loaded === "boolean" && cur.loaded) {
                  innerTreeRowData.noLazyChildren = !(cur.children && cur.children.length);
                }
                innerTreeRowData.loading = cur.loading;
              }
            }
            i++;
            tmp.push(rowRender(node, $index + i, innerTreeRowData));
            if (cur) {
              const nodes2 = lazyTreeNodeMap.value[childKey] || node[childrenColumnName.value];
              traverse(nodes2, cur);
            }
          });
        };
        cur.display = true;
        const nodes = lazyTreeNodeMap.value[key] || row[childrenColumnName.value];
        traverse(nodes, cur);
      }
      return tmp;
    } else {
      return rowRender(row, $index, void 0);
    }
  };
  return {
    wrappedRowRender,
    tooltipContent,
    tooltipTrigger
  };
}

export { useRender as default };
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