import * as vscode from 'vscode';
import { Orchestrator } from '../orchestrator/orchestrator';
import { runAIReview } from '../ai/engine';
import { loadActiveRules } from '../rules/yaml-parser';
import { filterAndSummarize } from '../rules/rule-filter';
import { mergeResults, MergedReport } from '../merger/merger';
import { reportToMarkdown } from '../utils/report';
import { getApiKey } from '../config';
import { ReviewPanel } from '../panel/webview';
import { t } from '../i18n/messages';

let currentReport: MergedReport | null = null;

export function registerCommands(
  context: vscode.ExtensionContext,
  orchestrator: Orchestrator,
): void {

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.review', async () => {
      const editor = vscode.window.activeTextEditor;
      if (!editor) {
        vscode.window.showWarningMessage(t('review.noEditor'));
        return;
      }

      const document = editor.document;
      const workspaceRoot = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath ?? '';
      const workingDir = workspaceRoot || vscode.Uri.joinPath(document.uri, '..').fsPath;

      await vscode.window.withProgress({
        location: vscode.ProgressLocation.Notification,
        title: t('review.running'),
        cancellable: false,
      }, async (progress) => {
        progress.report({ message: t('review.staticAnalysis') });

        const startTime = Date.now();
        const staticResult = await orchestrator.runStaticAnalysis(document, workingDir);

        progress.report({ message: t('review.aiReview') });

        const allRules = loadActiveRules(workspaceRoot);
        const filterResult = filterAndSummarize(allRules, document);
        const code = document.getText();
        const aiResult = await runAIReview(context, code, staticResult.diagnostics, filterResult.relevant);

        currentReport = mergeResults({
          staticDiagnostics: staticResult.diagnostics,
          customRuleResults: aiResult.customRuleResults,
          translatedDiagnostics: aiResult.translatedDiagnostics,
          aiFindings: aiResult.findings,
          errors: [...staticResult.errors, ...(aiResult.error ? [aiResult.error] : [])],
          degraded: aiResult.degraded,
          startTime,
          filePath: document.uri.fsPath,
          language: document.languageId,
          adapterIds: staticResult.adapterIds,
          customRuleFilterInfo: {
            totalActive: allRules.length,
            injected: filterResult.relevant.length,
            filteredOut: filterResult.filteredOut.length,
            skippedRequestA: filterResult.skippedRequestA,
          },
        });

        const panel = ReviewPanel.createOrShow(context.extensionUri);
        panel.update(currentReport);
      });
    })
  );

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.reviewSelection', async () => {
      const editor = vscode.window.activeTextEditor;
      if (!editor) { return; }

      const selection = editor.selection;
      if (selection.isEmpty) {
        vscode.window.showWarningMessage(t('review.noSelection'));
        return;
      }

      const code = editor.document.getText(selection);
      const apiKey = await getApiKey(context);
      if (!apiKey) {
        vscode.window.showWarningMessage(t('review.needApiKey'));
        return;
      }

      const workspaceRoot = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath ?? '';
      const customRules = loadActiveRules(workspaceRoot);

      await vscode.window.withProgress({
        location: vscode.ProgressLocation.Notification,
        title: t('review.reviewingSelection'),
        cancellable: false,
      }, async () => {
        const aiResult = await runAIReview(context, code, [], customRules);
        vscode.window.showInformationMessage(
          t('review.selectionComplete', { 0: String(aiResult.customRuleResults.length + aiResult.findings.length) })
        );
      });
    })
  );

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.openPanel', () => {
      ReviewPanel.createOrShow(context.extensionUri);
      if (currentReport) {
        const panel = ReviewPanel.createOrShow(context.extensionUri);
        panel.update(currentReport);
      }
    })
  );

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.exportReport', async () => {
      if (!currentReport) {
        vscode.window.showWarningMessage(t('export.needRunFirst'));
        return;
      }
      const markdown = reportToMarkdown(currentReport);
      const pick = await vscode.window.showQuickPick([
        { label: t('export.copyToClipboard'), description: t('export.copyDescription') },
        { label: t('export.downloadMarkdown'), description: t('export.saveDescription') },
      ], { placeHolder: t('export.selectMethod') });
      if (!pick) { return; }
      if (pick.label === t('export.copyToClipboard')) {
        await vscode.env.clipboard.writeText(markdown);
        vscode.window.showInformationMessage(t('export.copied'));
      } else {
        const fileName = currentReport.filePath.split(/[/\\]/).pop()?.replace(/\.[^.]+$/, '') ?? 'review-report';
        const defaultUri = vscode.workspace.workspaceFolders?.[0]
          ? vscode.Uri.joinPath(vscode.workspace.workspaceFolders[0].uri, `${fileName}-review.md`)
          : undefined;
        const uri = await vscode.window.showSaveDialog({
          defaultUri,
          filters: { 'Markdown': ['md'] },
          title: t('export.saveDialogTitle'),
        });
        if (!uri) { return; }
        await vscode.workspace.fs.writeFile(uri, Buffer.from(markdown, 'utf-8'));
        vscode.window.showInformationMessage(t('export.saved', { 0: uri.fsPath }));
      }
    })
  );

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.addCustomRule', () => {
      const workspaceRoot = vscode.workspace.workspaceFolders?.[0]?.uri.fsPath;
      if (!workspaceRoot) {
        vscode.window.showWarningMessage(t('setup.noWorkspace'));
        return;
      }
      vscode.window.showInformationMessage(t('setup.manageRulesHint'));
    })
  );

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.fixIssue', () => {
      vscode.window.showInformationMessage(t('review.fixNotAvailable'));
    })
  );

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.fixAll', () => {
      vscode.window.showInformationMessage(t('review.fixAllNotAvailable'));
    })
  );

  context.subscriptions.push(
    vscode.commands.registerCommand('codeReviewer.openSetup', async () => {
      try {
        await vscode.commands.executeCommand('workbench.view.extension.code-reviewer');
      } catch {
        const action = await vscode.window.showErrorMessage(
          t('setup.openSetupFail'),
          t('setup.openSettingsJson')
        );
        if (action === t('setup.openSettingsJson')) {
          await vscode.commands.executeCommand('workbench.action.openSettingsJson');
        }
      }
    })
  );
}