/*
Copyright (C) 2017  Cloudbase Solutions SRL
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import cookie from "js-cookie";

import Api from "@src/utils/ApiCaller";
import configLoader from "@src/utils/Config";
import type { Credentials, User } from "@src/@types/User";
import type { Role, Project, RoleAssignment } from "@src/@types/Project";
import utils from "@src/utils/ObjectUtils";

class UserModel {
  static parseUserData(data: any) {
    const newData = {
      id: data.token.user.id,
      name: data.token.user.name,
      email: data.token.user.email,
      project: data.token.project,
    };

    return newData;
  }
}

class UserSource {
  saveDomainName(domainName: string) {
    localStorage.setItem("userDomainName", domainName);
  }

  get domainName(): string {
    return configLoader.config.showUserDomainInput
      ? localStorage.getItem("userDomainName") ||
          configLoader.config.defaultUserDomain
      : configLoader.config.defaultUserDomain;
  }

  async login(userData: Credentials): Promise<any> {
    const auth = {
      auth: {
        identity: {
          methods: ["password"],
          password: {
            user: {
              name: userData.name,
              domain: { name: userData.domain },
              password: userData.password,
            },
          },
        },
        scope: "unscoped",
      },
    };

    Api.setDefaultHeader("X-Auth-Token", null);

    const response = await Api.send({
      url: `${configLoader.config.servicesUrls.keystone}/auth/tokens`,
      method: "POST",
      data: auth,
    });
    const token = response.headers
      ? response.headers["X-Subject-Token"] ||
        response.headers["x-subject-token"]
      : "";
    Api.setDefaultHeader("X-Auth-Token", token);
    cookie.set("unscopedToken", token, { expires: 30 });
    return response.data;
  }

  async loginScoped(projectId: string, skipCookie?: boolean): Promise<User> {
    const useProjectId = skipCookie
      ? projectId
      : cookie.get("projectId") || projectId;
    const token = cookie.get("unscopedToken");

    const auth = {
      auth: {
        identity: {
          methods: ["token"],
          token: {
            id: token,
          },
        },
        scope: {
          project: {
            id: useProjectId,
          },
        },
      },
    };

    Api.setDefaultHeader("X-Auth-Token", null);

    try {
      const response = await Api.send({
        url: `${configLoader.config.servicesUrls.keystone}/auth/tokens`,
        method: "POST",
        data: auth,
      });
      const subjectToken = response.headers
        ? response.headers["X-Subject-Token"] ||
          response.headers["x-subject-token"]
        : "";
      let data: User = UserModel.parseUserData(response.data);
      data = { ...data, token: subjectToken };
      cookie.set("token", data.token || "", { expires: 30 });
      cookie.set("projectId", data.project.id, { expires: 30 });
      Api.setDefaultHeader("X-Auth-Token", data.token || "");

      return data;
    } catch (err) {
      if (!skipCookie) {
        const user: User = await this.loginScoped(projectId, true);
        return user;
      }
      throw err;
    }
  }

  async tokenLogin(): Promise<User> {
    const token = cookie.get("token") || "";
    if (token) {
      Api.setDefaultHeader("X-Auth-Token", token);
    }

    try {
      const response = await Api.send({
        url: `${configLoader.config.servicesUrls.keystone}/auth/tokens`,
        headers: { "X-Subject-Token": token },
      });
      let data: User = UserModel.parseUserData(response.data);
      data = { ...data, token };
      return data;
    } catch (err) {
      cookie.remove("token");
      Api.setDefaultHeader("X-Auth-Token", null);
      throw err;
    }
  }

  async switchProject(): Promise<void> {
    const token = cookie.get("unscopedToken");
    if (token) {
      cookie.remove("projectId");
      return;
    }
    throw new Error("No unscoped token");
  }

  async logout(): Promise<void> {
    const token = cookie.get("token");
    const clear = () => {
      cookie.remove("token");
      window.location.href = "/login";
      Api.setDefaultHeader("X-Auth-Token", null);
    };

    try {
      await Api.send({
        url: `${configLoader.config.servicesUrls.keystone}/auth/tokens`,
        method: "DELETE",
        headers: { "X-Subject-Token": token || "" },
      });
    } finally {
      clear();
    }
  }

  async getUserInfo(userId: string): Promise<User> {
    const response = await Api.get(
      `${configLoader.config.servicesUrls.keystone}/users/${userId}`
    );
    return response.data.user;
  }

  async getAllUsers(skipLog?: boolean, quietError?: boolean): Promise<User[]> {
    const response = await Api.send({
      url: `${configLoader.config.servicesUrls.keystone}/users`,
      skipLog,
      quietError,
    });
    let users: User[] = response.data.users;
    await utils.waitFor(() => Boolean(configLoader.config));
    users = users
      .filter(u => !configLoader.config.hiddenUsers.find(hu => hu === u.name))
      .sort((u1, u2) => u1.name.localeCompare(u2.name));
    return users;
  }

  async update(
    userId: string,
    user: Partial<User>,
    oldUser: User | null
  ): Promise<User> {
    const data: any = { user: {} };
    const oldData: any = oldUser || {};

    if (user.email || oldData.email) {
      data.user.email = user.email;
    }
    if (user.description || oldData.description) {
      data.user.description = user.description;
    }
    if (user.enabled != null) {
      data.user.enabled = user.enabled;
    }
    if (user.name) {
      data.user.name = user.name;
    }
    if (user.password) {
      data.user.password = user.password;
    }
    if (user.project_id || oldData.project_id) {
      data.user.project_id = user.project_id;
    }

    const response = await Api.send({
      url: `${configLoader.config.servicesUrls.keystone}/users/${userId}`,
      method: "PATCH",
      data,
    });
    let updatedUser: User = response.data.user;
    if (updatedUser.extra) {
      updatedUser = {
        ...updatedUser,
        ...updatedUser.extra,
      };
    }
    // if project id was updated, assign him to that project, if his not already assigned
    if (data.user.project_id) {
      const projects: Project[] = await this.getProjects(updatedUser.id);
      if (projects.find(p => p.id === data.user.project_id)) {
        return updatedUser;
      }

      await this.assignUserToProject(
        updatedUser.id,
        updatedUser.project_id || "undefined"
      );
      return updatedUser;
    }

    return updatedUser;
  }

  async add(user: User): Promise<User> {
    const data: any = { user: {} };
    data.user.name = user.name;
    data.user.password = user.password || "";
    data.user.enabled = user.enabled == null ? true : user.enabled;

    if (user.email) {
      data.user.email = user.email;
    }
    if (user.description) {
      data.user.description = user.description;
    }
    if (user.project_id) {
      data.user.project_id = user.project_id;
    }

    const response = await Api.send({
      url: `${configLoader.config.servicesUrls.keystone}/users`,
      method: "POST",
      data,
    });
    let addedUser: User = response.data.user;
    if (addedUser.extra) {
      addedUser = {
        ...addedUser,
        ...addedUser.extra,
      };
    }
    // If the user has a project id set, assign him to that project with admin role
    if (addedUser.project_id) {
      await this.assignUserToProject(
        addedUser.id,
        addedUser.project_id || "undefined"
      );
      return addedUser;
    }
    return addedUser;
  }

  async delete(userId: string): Promise<void> {
    await Api.send({
      url: `${configLoader.config.servicesUrls.keystone}/users/${userId}`,
      method: "DELETE",
    });
  }

  async assignUserToProject(userId: string, projectId: string): Promise<void> {
    const roleId: string = await this.getMemberRoleId();
    await this.assignUserToProjectWithRole(userId, projectId, roleId);
  }

  async assignUserToProjectWithRole(
    userId: string,
    projectId: string,
    roleId: string
  ): Promise<void> {
    await Api.send({
      url: `${configLoader.config.servicesUrls.keystone}/projects/${projectId}/users/${userId}/roles/${roleId}`,
      method: "PUT",
    });
  }

  async getMemberRoleId(): Promise<string> {
    const roles: { id: string; name: string }[] = await this.getRoles();
    const role = roles.find(r => r.name === "_member_");
    const roleId = role ? role.id : "";
    return roleId;
  }

  async getAdminRoleId(): Promise<string> {
    const roles: { id: string; name: string }[] = await this.getRoles();
    const role = roles.find(
      r => r.name.toLowerCase() === configLoader.config.adminRoleName
    );
    const roleId = role ? role.id : "";
    return roleId;
  }

  async getRoles(): Promise<Role[]> {
    const response = await Api.get(
      `${configLoader.config.servicesUrls.keystone}/roles`
    );
    const roles: Role[] = response.data.roles;
    roles.sort((r1, r2) => r1.name.localeCompare(r2.name));
    return roles;
  }

  async getProjects(userId: string): Promise<Project[]> {
    const response = await Api.get(
      `${configLoader.config.servicesUrls.keystone}/role_assignments?include_names`
    );
    const assignments: RoleAssignment[] = response.data.role_assignments;
    const projects: Project[] = assignments
      .filter(a => a.user.id === userId)
      .filter(
        (a, i, arr) =>
          arr.findIndex(
            e =>
              e.scope.project &&
              a.scope.project &&
              e.scope.project.id === a.scope.project.id
          ) === i
      )
      .map(a => a.scope.project)
      .filter(utils.notEmpty);

    return projects;
  }

  async isAdmin(userId: string): Promise<boolean> {
    const response = await Api.send({
      url: `${configLoader.config.servicesUrls.keystone}/role_assignments?include_names`,
      quietError: true,
    });

    const roleAssignments: RoleAssignment[] = response.data.role_assignments;
    return (
      roleAssignments
        .filter(a => a && a.user && a.user.id === userId)
        .filter(
          a =>
            a &&
            a.role &&
            a.role.name &&
            a.role.name.toLowerCase() === configLoader.config.adminRoleName
        ).length > 0
    );
  }
}

export default new UserSource();