/**
 * Copyright (c) Microsoft Corporation.
 *
 * 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 { ErrorMessage } from '@web/components/errorMessage';
import * as React from 'react';
import type * as modelUtil from './modelUtil';
import { PlaceholderPanel } from './placeholderPanel';
import { renderAction } from './actionList';
import type { Language } from '@isomorphic/locatorGenerators';
import type { StackFrame } from '@protocol/channels';
import { CopyToClipboardTextButton } from './copyToClipboard';
import { attachmentURL } from './attachmentsTab';
import { fixTestPrompt } from '@web/components/prompts';
import type { GitCommitInfo } from '@testIsomorphic/types';

const GitCommitInfoContext = React.createContext<GitCommitInfo | undefined>(undefined);

export function GitCommitInfoProvider({ children, gitCommitInfo }: React.PropsWithChildren<{ gitCommitInfo: GitCommitInfo }>) {
  return <GitCommitInfoContext.Provider value={gitCommitInfo}>{children}</GitCommitInfoContext.Provider>;
}

export function useGitCommitInfo() {
  return React.useContext(GitCommitInfoContext);
}

const PromptButton: React.FC<{
  error: string;
  actions: modelUtil.ActionTraceEventInContext[];
}> = ({ error, actions }) => {
  const [pageSnapshot, setPageSnapshot] = React.useState<string>();

  React.useEffect(() => {
    for (const action of actions) {
      for (const attachment of action.attachments ?? []) {
        if (attachment.name === 'pageSnapshot') {
          fetch(attachmentURL({ ...attachment, traceUrl: action.context.traceUrl })).then(async response => {
            setPageSnapshot(await response.text());
          });
          return;
        }
      }
    }
  }, [actions]);

  const gitCommitInfo = useGitCommitInfo();
  const prompt = React.useMemo(
      () => fixTestPrompt(
          error,
          gitCommitInfo?.['pull.diff'] ?? gitCommitInfo?.['revision.diff'],
          pageSnapshot
      ),
      [error, gitCommitInfo, pageSnapshot]
  );

  return (
    <CopyToClipboardTextButton
      value={prompt}
      description='Fix with AI'
      copiedDescription={<>Copied <span className='codicon codicon-copy' style={{ marginLeft: '5px' }}/></>}
      style={{ width: '90px', justifyContent: 'center' }}
    />
  );
};

export type ErrorDescription = {
  action?: modelUtil.ActionTraceEventInContext;
  stack?: StackFrame[];
};

type ErrorsTabModel = {
  errors: Map<string, ErrorDescription>;
};

export function useErrorsTabModel(model: modelUtil.MultiTraceModel | undefined): ErrorsTabModel {
  return React.useMemo(() => {
    if (!model)
      return { errors: new Map() };
    const errors = new Map<string, ErrorDescription>();
    for (const error of model.errorDescriptors)
      errors.set(error.message, error);
    return { errors };
  }, [model]);
}

export const ErrorsTab: React.FunctionComponent<{
  errorsModel: ErrorsTabModel,
  actions: modelUtil.ActionTraceEventInContext[],
  sdkLanguage: Language,
  revealInSource: (error: ErrorDescription) => void,
}> = ({ errorsModel, sdkLanguage, revealInSource, actions }) => {
  if (!errorsModel.errors.size)
    return <PlaceholderPanel text='No errors' />;

  return <div className='fill' style={{ overflow: 'auto' }}>
    {[...errorsModel.errors.entries()].map(([message, error]) => {
      let location: string | undefined;
      let longLocation: string | undefined;
      const stackFrame = error.stack?.[0];
      if (stackFrame) {
        const file = stackFrame.file.replace(/.*[/\\](.*)/, '$1');
        location = file + ':' + stackFrame.line;
        longLocation = stackFrame.file + ':' + stackFrame.line;
      }
      return <div key={message}>
        <div className='hbox' style={{
          alignItems: 'center',
          padding: '5px 10px',
          minHeight: 36,
          fontWeight: 'bold',
          color: 'var(--vscode-errorForeground)',
        }}>
          {error.action && renderAction(error.action, { sdkLanguage })}
          {location && <div className='action-location'>
            @ <span title={longLocation} onClick={() => revealInSource(error)}>{location}</span>
          </div>}
          <span style={{ position: 'absolute', right: '5px' }}>
            <PromptButton error={message} actions={actions} />
          </span>
        </div>
        <ErrorMessage error={message} />
      </div>;
    })}
  </div>;
};