/**
 * Copyright (c) 2020-present, Goldman Sachs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {
  action,
  computed,
  flow,
  flowResult,
  makeObservable,
  observable,
} from 'mobx';
import type { EditorStore } from './EditorStore.js';
import {
  type PlainObject,
  type GeneratorFn,
  assertErrorThrown,
  LogEvent,
  NetworkClientError,
  HttpStatus,
  guaranteeNonNullable,
  assertTrue,
  ActionState,
  prettyCONSTName,
} from '@finos/legend-shared';
import { EDITOR_MODE, ACTIVITY_MODE } from './EditorConfig.js';
import { type Entity, extractEntityNameFromPath } from '@finos/legend-storage';
import {
  type EntityDiff,
  type WorkspaceType,
  Workflow,
  Project,
  Revision,
  RevisionAlias,
  Version,
  Workspace,
  WorkspaceAccessType,
  Patch,
  AuthorizableProjectAction,
  isProjectSandbox,
} from '@finos/legend-server-sdlc';
import { LEGEND_STUDIO_APP_EVENT } from '../../__lib__/LegendStudioEvent.js';

export const entityDiffSorter = (a: EntityDiff, b: EntityDiff): number =>
  extractEntityNameFromPath(a.newPath ?? a.oldPath ?? '').localeCompare(
    extractEntityNameFromPath(b.newPath ?? b.oldPath ?? ''),
  );

export class EditorSDLCState {
  readonly editorStore: EditorStore;

  readonly fetchPublishedProjectVersionsState = ActionState.create();

  isWorkspaceOutdated = false;
  isCheckingIfWorkspaceIsOutdated = false;
  isFetchingProjectVersions = false;
  isFetchingProject = false;

  currentProject?: Project | undefined;
  currentPatch?: Patch | undefined;
  currentWorkspace?: Workspace | undefined;
  remoteWorkspaceRevision?: Revision | undefined;
  currentRevision?: Revision | undefined;
  workspaceWorkflows: Workflow[] = [];
  projectVersions: Version[] = [];
  projectPublishedVersions: string[] = [];
  authorizedActions: AuthorizableProjectAction[] | undefined;

  constructor(editorStore: EditorStore) {
    makeObservable(this, {
      currentProject: observable,
      currentPatch: observable,
      currentWorkspace: observable,
      remoteWorkspaceRevision: observable,
      currentRevision: observable,
      isWorkspaceOutdated: observable,
      workspaceWorkflows: observable,
      projectVersions: observable,
      isCheckingIfWorkspaceIsOutdated: observable,
      isFetchingProjectVersions: observable,
      isFetchingProject: observable,
      projectPublishedVersions: observable,
      authorizedActions: observable,
      activeProject: computed,
      activeWorkspace: computed,
      activeRevision: computed,
      activePatch: computed,
      activeRemoteWorkspaceRevision: computed,
      canCreateWorkspace: computed,
      canCreateVersion: computed,
      isWorkspaceOutOfSync: computed,
      isActiveProjectSandbox: computed,
      setCurrentProject: action,
      setCurrentPatch: action,
      setCurrentWorkspace: action,
      setCurrentRevision: action,
      setWorkspaceLatestRevision: action,
      fetchCurrentProject: flow,
      fetchCurrentWorkspace: flow,
      fetchProjectVersions: flow,
      checkIfCurrentWorkspaceIsInConflictResolutionMode: flow,
      fetchRemoteWorkspaceRevision: flow,
      fetchCurrentRevision: flow,
      fetchCurrentPatch: flow,
      checkIfWorkspaceIsOutdated: flow,
      buildWorkspaceLatestRevisionEntityHashesIndex: flow,
      buildWorkspaceBaseRevisionEntityHashesIndex: flow,
      buildProjectLatestRevisionEntityHashesIndex: flow,
      fetchWorkspaceWorkflows: flow,
      fetchPublishedProjectVersions: flow,
      fetchAuthorizedActions: flow,
    });

    this.editorStore = editorStore;
  }

  get activeProject(): Project {
    return guaranteeNonNullable(
      this.currentProject,
      `Active project has not been properly set`,
    );
  }
  get isActiveProjectSandbox(): boolean {
    return Boolean(
      this.currentProject && isProjectSandbox(this.currentProject),
    );
  }

  get activeWorkspace(): Workspace {
    return guaranteeNonNullable(
      this.currentWorkspace,
      `Active workspace has not been properly set`,
    );
  }

  get activePatch(): Patch | undefined {
    return this.currentPatch;
  }

  get activeRevision(): Revision {
    return guaranteeNonNullable(
      this.currentRevision,
      `Active revision has not been properly set`,
    );
  }

  get activeRemoteWorkspaceRevision(): Revision {
    return guaranteeNonNullable(
      this.remoteWorkspaceRevision,
      `Active workspace latest revision has not been properly set`,
    );
  }

  get isWorkspaceOutOfSync(): boolean {
    return this.activeRemoteWorkspaceRevision.id !== this.activeRevision.id;
  }

  get canCreateWorkspace(): boolean {
    return this.userCanPerformAction(
      AuthorizableProjectAction.CREATE_WORKSPACE,
    );
  }

  get canCreateVersion(): boolean {
    return this.userCanPerformAction(AuthorizableProjectAction.CREATE_VERSION);
  }

  unAuthorizedActionMessage(_action: AuthorizableProjectAction): string {
    return `Your are not entitled to perform the action: ${prettyCONSTName(
      _action,
    )}`;
  }

  userCanPerformAction(authorizedAction: AuthorizableProjectAction): boolean {
    return Boolean(
      this.authorizedActions === undefined ||
        this.authorizedActions.includes(authorizedAction),
    );
  }

  setCurrentProject(val: Project): void {
    this.currentProject = val;
  }

  setCurrentPatch(val: Patch): void {
    this.currentPatch = val;
  }

  setCurrentWorkspace(val: Workspace): void {
    this.currentWorkspace = val;
  }

  setCurrentRevision(val: Revision): void {
    this.currentRevision = val;
  }

  setWorkspaceLatestRevision(val: Revision): void {
    this.remoteWorkspaceRevision = val;
  }

  handleChangeDetectionRefreshIssue(error: Error): void {
    if (
      !this.currentProject ||
      !this.currentWorkspace ||
      (error instanceof NetworkClientError &&
        error.response.status === HttpStatus.NOT_FOUND)
    ) {
      this.editorStore.applicationStore.alertService.setBlockingAlert({
        message: 'Current project or workspace no longer exists',
        prompt: 'Please refresh the application',
      });
    } else {
      this.editorStore.applicationStore.alertService.setBlockingAlert({
        message: error.message,
      });
    }
  }

  *fetchCurrentProject(
    projectId: string,
    options?: { suppressNotification?: boolean },
  ): GeneratorFn<void> {
    try {
      this.isFetchingProject = true;
      this.currentProject = Project.serialization.fromJson(
        (yield this.editorStore.sdlcServerClient.getProject(
          projectId,
        )) as PlainObject<Project>,
      );
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      if (!options?.suppressNotification) {
        this.editorStore.applicationStore.notificationService.notifyError(
          error,
        );
      }
    } finally {
      this.isFetchingProject = false;
    }
  }

  *fetchCurrentPatch(
    projectId: string,
    patchReleaseVersionId: string | undefined,
    options?: { suppressNotification?: boolean },
  ): GeneratorFn<void> {
    if (patchReleaseVersionId) {
      try {
        this.currentPatch = Patch.serialization.fromJson(
          (yield this.editorStore.sdlcServerClient.getPatch(
            projectId,
            patchReleaseVersionId,
          )) as PlainObject<Patch>,
        );
      } catch (error) {
        assertErrorThrown(error);
        this.editorStore.applicationStore.logService.error(
          LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
          error,
        );
        if (!options?.suppressNotification) {
          this.editorStore.applicationStore.notificationService.notifyError(
            error,
          );
        }
      }
    }
  }

  *fetchCurrentWorkspace(
    projectId: string,
    patchReleaseVersionId: string | undefined,
    workspaceId: string,
    workspaceType: WorkspaceType,
    options?: { suppressNotification?: boolean },
  ): GeneratorFn<void> {
    try {
      this.currentWorkspace = Workspace.serialization.fromJson(
        (yield this.editorStore.sdlcServerClient.getWorkspace(
          projectId,
          patchReleaseVersionId,
          workspaceId,
          workspaceType,
        )) as PlainObject<Workspace>,
      );
      this.currentWorkspace.source = patchReleaseVersionId;
      const isInConflictResolutionMode = (yield flowResult(
        this.checkIfCurrentWorkspaceIsInConflictResolutionMode(),
      )) as boolean;
      if (isInConflictResolutionMode) {
        this.editorStore.setMode(EDITOR_MODE.CONFLICT_RESOLUTION);
        this.currentWorkspace.accessType =
          WorkspaceAccessType.CONFLICT_RESOLUTION;
        this.editorStore.setActiveActivity(ACTIVITY_MODE.CONFLICT_RESOLUTION);
      }
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      if (!options?.suppressNotification) {
        this.editorStore.applicationStore.notificationService.notifyError(
          error,
        );
      }
    }
  }

  *fetchProjectVersions(): GeneratorFn<void> {
    try {
      this.isFetchingProjectVersions = true;
      this.projectVersions = (
        (yield this.editorStore.sdlcServerClient.getVersions(
          this.activeProject.projectId,
        )) as PlainObject<Version>[]
      ).map((v) => Version.serialization.fromJson(v));
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
    } finally {
      this.isFetchingProjectVersions = false;
    }
  }

  *checkIfCurrentWorkspaceIsInConflictResolutionMode(): GeneratorFn<boolean> {
    return (yield this.editorStore.sdlcServerClient.checkIfWorkspaceIsInConflictResolutionMode(
      this.activeProject.projectId,
      this.activeWorkspace,
    )) as boolean;
  }

  *fetchRemoteWorkspaceRevision(
    projectId: string,
    workspace: Workspace,
  ): GeneratorFn<void> {
    try {
      this.editorStore.localChangesState.workspaceSyncState.setIncomingRevisions(
        [],
      );
      const latestRevision = Revision.serialization.fromJson(
        this.editorStore.isInConflictResolutionMode
          ? ((yield this.editorStore.sdlcServerClient.getConflictResolutionRevision(
              projectId,
              workspace,
              RevisionAlias.CURRENT,
            )) as PlainObject<Revision>)
          : ((yield this.editorStore.sdlcServerClient.getRevision(
              projectId,
              workspace,
              RevisionAlias.CURRENT,
            )) as PlainObject<Revision>),
      );
      this.setWorkspaceLatestRevision(latestRevision);
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      this.editorStore.applicationStore.notificationService.notifyError(error);
    }
  }

  *fetchCurrentRevision(
    projectId: string,
    workspace: Workspace,
  ): GeneratorFn<void> {
    try {
      const currentRevision = Revision.serialization.fromJson(
        this.editorStore.isInConflictResolutionMode
          ? ((yield this.editorStore.sdlcServerClient.getConflictResolutionRevision(
              projectId,
              workspace,
              RevisionAlias.CURRENT,
            )) as PlainObject<Revision>)
          : ((yield this.editorStore.sdlcServerClient.getRevision(
              projectId,
              workspace,
              RevisionAlias.CURRENT,
            )) as PlainObject<Revision>),
      );
      this.setCurrentRevision(currentRevision);
      this.setWorkspaceLatestRevision(currentRevision);
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      this.editorStore.applicationStore.notificationService.notifyError(error);
    }
  }

  *checkIfWorkspaceIsOutdated(): GeneratorFn<void> {
    try {
      this.isCheckingIfWorkspaceIsOutdated = true;
      this.isWorkspaceOutdated = this.editorStore.isInConflictResolutionMode
        ? ((yield this.editorStore.sdlcServerClient.isConflictResolutionOutdated(
            this.activeProject.projectId,
            this.activeWorkspace,
          )) as boolean)
        : ((yield this.editorStore.sdlcServerClient.isWorkspaceOutdated(
            this.activeProject.projectId,
            this.activeWorkspace,
          )) as boolean);
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      this.editorStore.applicationStore.notificationService.notifyError(error);
    } finally {
      this.isCheckingIfWorkspaceIsOutdated = false;
    }
  }

  *buildWorkspaceLatestRevisionEntityHashesIndex(): GeneratorFn<void> {
    try {
      let entities: Entity[] = [];
      if (!this.editorStore.isInConflictResolutionMode) {
        // fetch latest revision
        // NOTE: this check is already covered in conflict resolution mode so we don't need to do it here
        const latestRevision = Revision.serialization.fromJson(
          (yield this.editorStore.sdlcServerClient.getRevision(
            this.activeProject.projectId,
            this.activeWorkspace,
            RevisionAlias.CURRENT,
          )) as PlainObject<Revision>,
        );
        // make sure there is no good recovery from this, at this point all users work risk conflict
        assertTrue(
          latestRevision.id === this.activeRevision.id,
          `Can't run local change detection: current workspace revision is not the latest. Please backup your work and refresh the application`,
        );
        entities =
          (yield this.editorStore.sdlcServerClient.getEntitiesByRevision(
            this.activeProject.projectId,
            this.activeWorkspace,
            this.activeRevision.id,
          )) as Entity[];
      } else {
        entities =
          (yield this.editorStore.sdlcServerClient.getEntitiesByRevision(
            this.activeProject.projectId,
            this.activeWorkspace,
            RevisionAlias.CURRENT,
          )) as Entity[];
      }
      this.editorStore.changeDetectionState.workspaceLocalLatestRevisionState.setEntities(
        entities,
      );
      yield flowResult(
        this.editorStore.changeDetectionState.workspaceLocalLatestRevisionState.buildEntityHashesIndex(
          entities,
          LogEvent.create(
            LEGEND_STUDIO_APP_EVENT.CHANGE_DETECTION_BUILD_LOCAL_HASHES_INDEX__SUCCESS,
          ),
        ),
      );
      this.editorStore.tabManagerState.refreshCurrentEntityDiffViewer();
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      this.editorStore.applicationStore.notificationService.notifyError(error);
    }
  }

  *buildWorkspaceBaseRevisionEntityHashesIndex(): GeneratorFn<void> {
    try {
      const workspaceBaseEntities =
        (yield this.editorStore.sdlcServerClient.getEntitiesByRevision(
          this.activeProject.projectId,
          this.activeWorkspace,
          RevisionAlias.BASE,
        )) as Entity[];
      this.editorStore.changeDetectionState.workspaceBaseRevisionState.setEntities(
        workspaceBaseEntities,
      );
      yield flowResult(
        this.editorStore.changeDetectionState.workspaceBaseRevisionState.buildEntityHashesIndex(
          workspaceBaseEntities,
          LogEvent.create(
            LEGEND_STUDIO_APP_EVENT.CHANGE_DETECTION_BUILD_WORKSPACE_HASHES_INDEX__SUCCESS,
          ),
        ),
      );
      this.editorStore.tabManagerState.refreshCurrentEntityDiffViewer();
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      this.editorStore.applicationStore.notificationService.notifyError(error);
    }
  }

  *buildProjectLatestRevisionEntityHashesIndex(): GeneratorFn<void> {
    try {
      const projectLatestEntities =
        (yield this.editorStore.sdlcServerClient.getEntities(
          this.activeProject.projectId,
          undefined,
        )) as Entity[];
      this.editorStore.changeDetectionState.projectLatestRevisionState.setEntities(
        projectLatestEntities,
      );
      yield flowResult(
        this.editorStore.changeDetectionState.projectLatestRevisionState.buildEntityHashesIndex(
          projectLatestEntities,
          LogEvent.create(
            LEGEND_STUDIO_APP_EVENT.CHANGE_DETECTION_BUILD_PROJECT_LATEST_HASHES_INDEX__SUCCESS,
          ),
        ),
      );
      this.editorStore.tabManagerState.refreshCurrentEntityDiffViewer();
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      this.editorStore.applicationStore.notificationService.notifyError(error);
    }
  }

  *fetchWorkspaceWorkflows(): GeneratorFn<void> {
    try {
      this.workspaceWorkflows = (
        (yield this.editorStore.sdlcServerClient.getWorkflowsByRevision(
          this.activeProject.projectId,
          this.activeWorkspace,
          RevisionAlias.CURRENT,
        )) as PlainObject<Workflow>[]
      ).map((v) => Workflow.serialization.fromJson(v));
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
      this.editorStore.applicationStore.notificationService.notifyError(error);
    }
  }

  *fetchAuthorizedActions(): GeneratorFn<void> {
    try {
      const authorizedActions =
        (yield this.editorStore.sdlcServerClient.getAutorizedActions(
          this.activeProject.projectId,
        )) as AuthorizableProjectAction[];
      this.authorizedActions = authorizedActions;
    } catch (error) {
      assertErrorThrown(error);
      // if there is an error fetching authorized actions we should set undefined
      this.authorizedActions = undefined;
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.SDLC_MANAGER_FAILURE),
        error,
      );
    }
  }

  *fetchPublishedProjectVersions(): GeneratorFn<void> {
    try {
      this.fetchPublishedProjectVersionsState.inProgress();
      this.projectPublishedVersions =
        (yield this.editorStore.depotServerClient.getVersions(
          this.editorStore.projectConfigurationEditorState
            .currentProjectConfiguration.groupId,
          this.editorStore.projectConfigurationEditorState
            .currentProjectConfiguration.artifactId,
          true,
        )) as string[];
    } catch (error) {
      assertErrorThrown(error);
      this.editorStore.applicationStore.logService.error(
        LogEvent.create(LEGEND_STUDIO_APP_EVENT.DEPOT_MANAGER_FAILURE),
        error,
      );
    } finally {
      this.fetchPublishedProjectVersionsState.complete();
    }
  }
}