import * as plugins from '../plugins.js';
import { AiDoc } from '../classes.aidoc.js';
import { ProjectContext } from './projectcontext.js';

export interface INextCommitObject {
  recommendedNextVersionLevel: 'patch' | 'minor' | 'major'; // the recommended next version level of the project
  recommendedNextVersion: string; // the recommended next version of the project
  message: string; // the commit message. use conventional commits format
  changelog?: string; // the changelog
}

export class Commit {
  private aiDocsRef: AiDoc;
  private projectDir: string;

  constructor(aiDocsRef: AiDoc, projectDirArg: string) {
    this.aiDocsRef = aiDocsRef;
    this.projectDir = projectDirArg;
  }

  public async buildNextCommitObject(): Promise<INextCommitObject> {
    const smartgitInstance = new plugins.smartgit.Smartgit();
    await smartgitInstance.init();
    const gitRepo = await plugins.smartgit.GitRepo.fromOpeningRepoDir(smartgitInstance, this.projectDir);
    const diffString = await gitRepo.getUncommittedDiff();
    const projectContext = new ProjectContext(this.projectDir);
    let contextString = await projectContext.update();
    contextString = `
${contextString}

Here is the diff:
${diffString}
    `

    let result = await this.aiDocsRef.openaiInstance.chat({
      systemMessage: `
You create a commit message for a git commit.
The commit message should be based on the files in the project.
You should not include any licensing information.
You should not include any personal information.

Important: Answer only in valid JSON.

Your answer should be parseable with JSON.parse() without modifying anything.

Here is the structure of the JSON you should return:
{
  recommendedNextVersionLevel: 'patch' | 'minor' | 'major'; // the recommended next version level of the project
  recommendedNextVersion: string; // the recommended next version of the project
  message: string; // the commit message. use conventional commits format
}

You are being given the files of the project. You should use them to create the commit message.
Also you are given a diff

`,
      messageHistory: [],
      userMessage: contextString,
    });

    // console.log(result.message);
    const resultObject: INextCommitObject = JSON.parse(result.message.replace('```json', '').replace('```', ''));

    // lets build the changelog based on that
    const commitMessages = await gitRepo.getAllCommitMessages();
    const previousChangelogPath = plugins.path.join(this.projectDir, 'changelog.md');
    let previousChangelog: plugins.smartfile.SmartFile;
    if (await plugins.smartfile.fs.fileExists(previousChangelogPath)) {
      previousChangelog = await plugins.smartfile.SmartFile.fromFilePath(previousChangelogPath);
    }
    let result2 = await this.aiDocsRef.openaiInstance.chat({
      messageHistory: [],
      systemMessage: `
You are building a changelog file for the projext.
Omit commits and versions that lack relevant changes.

You are given
* the previous changelog file (if available)
* the commit messages of the project

Only return the changelog file, so it can be written directly to changelog.md

For the latest version, that is not yet part of the commit messages, use {{nextVersion}} and {{nextDescription}} placeholders.
      `,
      userMessage: `
The previous changelog file is:
${(!previousChangelog) ? 'No previous changelog file found' : previousChangelog.contents.toString()}

Here are the commit messages so far:

${commitMessages.join('\n\n')}
`
    })
    resultObject.changelog = result2.message;
    return resultObject;
  }
}