import * as types from '../mutation_types';
import { sortTree, mergeTrees } from '../utils';

export default {
  [types.TOGGLE_TREE_OPEN](state, path) {
    Object.assign(state.entries[path], {
      opened: !state.entries[path].opened,
    });
  },
  [types.SET_TREE_OPEN](state, path) {
    Object.assign(state.entries[path], {
      opened: true,
    });
  },
  [types.CREATE_TREE](state, { treePath }) {
    Object.assign(state, {
      trees: {
        ...state.trees,
        [treePath]: {
          tree: [],
          loading: true,
        },
      },
    });
  },
  [types.SET_DIRECTORY_DATA](state, { data, treePath }) {
    const selectedTree = state.trees[treePath];

    // If we opened files while loading the tree, we need to merge them
    // Otherwise, simply overwrite the tree
    const tree = !selectedTree.tree.length
      ? data
      : selectedTree.loading && mergeTrees(selectedTree.tree, data);

    Object.assign(selectedTree, { tree });
  },
  [types.SET_LAST_COMMIT_URL](state, { tree = state, url }) {
    Object.assign(tree, {
      lastCommitPath: url,
    });
  },
  [types.REMOVE_ALL_CHANGES_FILES](state) {
    Object.assign(state, {
      changedFiles: [],
    });
  },
  [types.RESTORE_TREE](state, path) {
    const entry = state.entries[path];
    const parent = entry.parentPath
      ? state.entries[entry.parentPath]
      : state.trees[`${state.currentProjectId}/${state.currentBranchId}`];

    if (!parent.tree.find(f => f.path === path)) {
      parent.tree = sortTree(parent.tree.concat(entry));
    }
  },
};