import store from '../store';
import utils from './utils';

const forbiddenFolderNameMatcher = /^\.stackedit-data$|^\.stackedit-trash$|\.md$|\.sync$|\.publish$/;

export default {
  /**
   * Create a file in the store with the specified fields.
   */
  async createFile({
    name,
    parentId,
    text,
    properties,
    discussions,
    comments,
  } = {}, background = false) {
    const id = utils.uid();
    const file = {
      id,
      name: utils.sanitizeName(name),
      parentId: parentId || null,
    };
    const content = {
      id: `${id}/content`,
      text: utils.sanitizeText(text || store.getters['data/computedSettings'].newFileContent),
      properties: utils
        .sanitizeText(properties || store.getters['data/computedSettings'].newFileProperties),
      discussions: discussions || {},
      comments: comments || {},
    };
    const workspaceUniquePaths = store.getters['workspace/hasUniquePaths'];

    // Show warning dialogs
    if (!background) {
      // If name is being stripped
      if (file.name !== utils.defaultName && file.name !== name) {
        await store.dispatch('modal/stripName', name);
      }

      // Check if there is already a file with that path
      if (workspaceUniquePaths) {
        const parentPath = store.getters.itemPaths[file.parentId] || '';
        const path = parentPath + file.name;
        if (store.getters.pathItems[path]) {
          await store.dispatch('modal/pathConflict', name);
        }
      }
    }

    // Save file and content in the store
    store.commit('content/setItem', content);
    store.commit('file/setItem', file);
    if (workspaceUniquePaths) {
      this.makePathUnique(id);
    }

    // Return the new file item
    return store.state.file.itemMap[id];
  },

  /**
   * Make sanity checks and then create/update the folder/file in the store.
   */
  async storeItem(item) {
    const id = item.id || utils.uid();
    const sanitizedName = utils.sanitizeName(item.name);

    if (item.type === 'folder' && forbiddenFolderNameMatcher.exec(sanitizedName)) {
      await store.dispatch('modal/unauthorizedName', item.name);
      throw new Error('Unauthorized name.');
    }

    // Show warning dialogs
    // If name has been stripped
    if (sanitizedName !== utils.defaultName && sanitizedName !== item.name) {
      await store.dispatch('modal/stripName', item.name);
    }
    // Check if there is a path conflict
    if (store.getters['workspace/hasUniquePaths']) {
      const parentPath = store.getters.itemPaths[item.parentId] || '';
      const path = parentPath + sanitizedName;
      const pathItems = store.getters.pathItems[path] || [];
      if (pathItems.some(itemWithSamePath => itemWithSamePath.id !== id)) {
        await store.dispatch('modal/pathConflict', item.name);
      }
    }

    return this.setOrPatchItem({
      ...item,
      id,
    });
  },

  /**
   * Create/update the folder/file in the store and make sure its path is unique.
   */
  setOrPatchItem(patch) {
    const item = {
      ...store.getters.allItemMap[patch.id] || patch,
    };
    if (!item.id) {
      return null;
    }

    if (patch.parentId !== undefined) {
      item.parentId = patch.parentId || null;
    }
    if (patch.name) {
      const sanitizedName = utils.sanitizeName(patch.name);
      if (item.type !== 'folder' || !forbiddenFolderNameMatcher.exec(sanitizedName)) {
        item.name = sanitizedName;
      }
    }

    // Save item in the store
    store.commit(`${item.type}/setItem`, item);

    // Ensure path uniqueness
    if (store.getters['workspace/hasUniquePaths']) {
      this.makePathUnique(item.id);
    }

    return store.getters.allItemMap[item.id];
  },

  /**
   * Delete a file in the store and all its related items.
   */
  deleteFile(fileId) {
    // Delete the file
    store.commit('file/deleteItem', fileId);
    // Delete the content
    store.commit('content/deleteItem', `${fileId}/content`);
    // Delete the syncedContent
    store.commit('syncedContent/deleteItem', `${fileId}/syncedContent`);
    // Delete the contentState
    store.commit('contentState/deleteItem', `${fileId}/contentState`);
    // Delete sync locations
    (store.getters['syncLocation/groupedByFileId'][fileId] || [])
      .forEach(item => store.commit('syncLocation/deleteItem', item.id));
    // Delete publish locations
    (store.getters['publishLocation/groupedByFileId'][fileId] || [])
      .forEach(item => store.commit('publishLocation/deleteItem', item.id));
  },

  /**
   * Ensure two files/folders don't have the same path if the workspace doesn't support it.
   */
  ensureUniquePaths() {
    if (store.getters['workspace/hasUniquePaths']) {
      if (Object.keys(store.getters.itemPaths).some(id => this.makePathUnique(id))) {
        this.ensureUniquePaths();
      }
    }
  },

  /**
   * Return false if the file/folder path is unique.
   * Add a prefix to its name and return true otherwise.
   */
  makePathUnique(id) {
    const { pathItems, allItemMap, itemPaths } = store.getters;
    const item = allItemMap[id];
    if (!item) {
      return false;
    }
    let path = itemPaths[id];
    if (pathItems[path].length === 1) {
      return false;
    }
    const isFolder = item.type === 'folder';
    if (isFolder) {
      // Remove trailing slash
      path = path.slice(0, -1);
    }
    for (let suffix = 1; ; suffix += 1) {
      let pathWithPrefix = `${path}.${suffix}`;
      if (isFolder) {
        pathWithPrefix += '/';
      }
      if (!pathItems[pathWithPrefix]) {
        store.commit(`${item.type}/patchItem`, {
          id: item.id,
          name: `${item.name}.${suffix}`,
        });
        return true;
      }
    }
  },
};