'use strict';
import { Objects } from './system';
import { commands, ExtensionContext, extensions, languages, Uri, window, workspace } from 'vscode';
import { BlameActiveLineController } from './blameActiveLineController';
import { BlameAnnotationController } from './blameAnnotationController';
import { CommandContext, setCommandContext } from './commands';
import { CloseUnchangedFilesCommand, OpenChangedFilesCommand } from './commands';
import { OpenBranchInRemoteCommand, OpenCommitInRemoteCommand, OpenFileInRemoteCommand, OpenInRemoteCommand, OpenRepoInRemoteCommand } from './commands';
import { CopyMessageToClipboardCommand, CopyShaToClipboardCommand } from './commands';
import { DiffDirectoryCommand, DiffLineWithPreviousCommand, DiffLineWithWorkingCommand, DiffWithBranchCommand, DiffWithNextCommand, DiffWithPreviousCommand, DiffWithWorkingCommand} from './commands';
import { ShowBlameCommand, ToggleBlameCommand } from './commands';
import { ShowBlameHistoryCommand, ShowFileHistoryCommand } from './commands';
import { ShowLastQuickPickCommand } from './commands';
import { ShowQuickBranchHistoryCommand, ShowQuickCurrentBranchHistoryCommand, ShowQuickFileHistoryCommand } from './commands';
import { ShowCommitSearchCommand, ShowQuickCommitDetailsCommand, ShowQuickCommitFileDetailsCommand } from './commands';
import { ShowQuickRepoStatusCommand, ShowQuickStashListCommand } from './commands';
import { StashApplyCommand, StashDeleteCommand, StashSaveCommand } from './commands';
import { ToggleCodeLensCommand } from './commands';
import { Keyboard } from './commands';
import { IConfig } from './configuration';
import { ApplicationInsightsKey, BuiltInCommands, ExtensionKey, QualifiedExtensionId, WorkspaceState } from './constants';
import { GitContentProvider } from './gitContentProvider';
import { GitContextTracker, GitService } from './gitService';
import { GitRevisionCodeLensProvider } from './gitRevisionCodeLensProvider';
import { Logger } from './logger';
import { Telemetry } from './telemetry';

// this method is called when your extension is activated
export async function activate(context: ExtensionContext) {
    Logger.configure(context);
    Telemetry.configure(ApplicationInsightsKey);

    const gitlens = extensions.getExtension(QualifiedExtensionId)!;
    const gitlensVersion = gitlens.packageJSON.version;

    const rootPath = workspace.rootPath && workspace.rootPath.replace(/\\/g, '/');
    Logger.log(`GitLens(v${gitlensVersion}) active: ${rootPath}`);

    const cfg = workspace.getConfiguration().get<IConfig>(ExtensionKey)!;
    const gitPath = cfg.advanced.git;

    try {
        await GitService.getGitPath(gitPath);
    }
    catch (ex) {
        Logger.error(ex, 'Extension.activate');
        if (ex.message.includes('Unable to find git')) {
            await window.showErrorMessage(`GitLens was unable to find Git. Please make sure Git is installed. Also ensure that Git is either in the PATH, or that 'gitlens.advanced.git' is pointed to its installed location.`);
        }
        setCommandContext(CommandContext.Enabled, false);
        return;
    }

    const repoPath = await GitService.getRepoPath(rootPath);

    const gitVersion = GitService.getGitVersion();
    Logger.log(`Git version: ${gitVersion}`);

    const telemetryContext: { [id: string]: any } = Object.create(null);
    telemetryContext.version = gitlensVersion;
    telemetryContext['git.version'] = gitVersion;
    Telemetry.setContext(telemetryContext);

    notifyOnUnsupportedGitVersion(context, gitVersion);
    notifyOnNewGitLensVersion(context, gitlensVersion);

    const git = new GitService(context, repoPath);
    context.subscriptions.push(git);

    const gitContextTracker = new GitContextTracker(git);
    context.subscriptions.push(gitContextTracker);

    context.subscriptions.push(workspace.registerTextDocumentContentProvider(GitContentProvider.scheme, new GitContentProvider(context, git)));

    context.subscriptions.push(languages.registerCodeLensProvider(GitRevisionCodeLensProvider.selector, new GitRevisionCodeLensProvider(context, git)));

    const annotationController = new BlameAnnotationController(context, git, gitContextTracker);
    context.subscriptions.push(annotationController);

    const activeLineController = new BlameActiveLineController(context, git, gitContextTracker, annotationController);
    context.subscriptions.push(activeLineController);

    context.subscriptions.push(new Keyboard());

    context.subscriptions.push(new CloseUnchangedFilesCommand(git));
    context.subscriptions.push(new OpenChangedFilesCommand(git));
    context.subscriptions.push(new CopyMessageToClipboardCommand(git));
    context.subscriptions.push(new CopyShaToClipboardCommand(git));
    context.subscriptions.push(new DiffDirectoryCommand(git));
    context.subscriptions.push(new DiffLineWithPreviousCommand(git));
    context.subscriptions.push(new DiffLineWithWorkingCommand(git));
    context.subscriptions.push(new DiffWithBranchCommand(git));
    context.subscriptions.push(new DiffWithNextCommand(git));
    context.subscriptions.push(new DiffWithPreviousCommand(git));
    context.subscriptions.push(new DiffWithWorkingCommand(git));
    context.subscriptions.push(new OpenBranchInRemoteCommand(git));
    context.subscriptions.push(new OpenCommitInRemoteCommand(git));
    context.subscriptions.push(new OpenFileInRemoteCommand(git));
    context.subscriptions.push(new OpenInRemoteCommand());
    context.subscriptions.push(new OpenRepoInRemoteCommand(git));
    context.subscriptions.push(new ShowBlameCommand(annotationController));
    context.subscriptions.push(new ToggleBlameCommand(annotationController));
    context.subscriptions.push(new ShowBlameHistoryCommand(git));
    context.subscriptions.push(new ShowFileHistoryCommand(git));
    context.subscriptions.push(new ShowLastQuickPickCommand());
    context.subscriptions.push(new ShowQuickBranchHistoryCommand(git));
    context.subscriptions.push(new ShowQuickCurrentBranchHistoryCommand(git));
    context.subscriptions.push(new ShowQuickCommitDetailsCommand(git));
    context.subscriptions.push(new ShowQuickCommitFileDetailsCommand(git));
    context.subscriptions.push(new ShowCommitSearchCommand(git));
    context.subscriptions.push(new ShowQuickFileHistoryCommand(git));
    context.subscriptions.push(new ShowQuickRepoStatusCommand(git));
    context.subscriptions.push(new ShowQuickStashListCommand(git));
    context.subscriptions.push(new StashApplyCommand(git));
    context.subscriptions.push(new StashDeleteCommand(git));
    context.subscriptions.push(new StashSaveCommand(git));
    context.subscriptions.push(new ToggleCodeLensCommand(git));

    Telemetry.trackEvent('initialized', Objects.flatten(cfg, 'config', true));
}

// this method is called when your extension is deactivated
export function deactivate() { }

async function notifyOnNewGitLensVersion(context: ExtensionContext, version: string) {
    if (context.globalState.get(WorkspaceState.SuppressUpdateNotice, false)) return;

    const previousVersion = context.globalState.get<string>(WorkspaceState.GitLensVersion);

    await context.globalState.update(WorkspaceState.GitLensVersion, version);

    if (previousVersion) {
        const [major, minor] = version.split('.');
        const [prevMajor, prevMinor] = previousVersion.split('.');
        if (major === prevMajor && minor === prevMinor) return;
    }

    const result = await window.showInformationMessage(`GitLens has been updated to v${version}`, 'View Release Notes', `Don't Show Again`);
    if (result === 'View Release Notes') {
        commands.executeCommand(BuiltInCommands.Open, Uri.parse('https://marketplace.visualstudio.com/items/eamodio.gitlens/changelog'));
    }
    else if (result === `Don't Show Again`) {
        context.globalState.update(WorkspaceState.SuppressUpdateNotice, true);
    }
}

async function notifyOnUnsupportedGitVersion(context: ExtensionContext, version: string) {
    if (context.globalState.get(WorkspaceState.SuppressGitVersionWarning, false)) return;

    // If git is less than v2.2.0
    if (!GitService.validateGitVersion(2, 2)) {
        const result = await window.showErrorMessage(`GitLens requires a newer version of Git (>= 2.2.0) than is currently installed (${version}). Please install a more recent version of Git.`, `Don't Show Again`);
        if (result === `Don't Show Again`) {
            context.globalState.update(WorkspaceState.SuppressGitVersionWarning, true);
        }
    }
}