import { BaseFormatter } from '../classes.baseformatter.js';
import type { IPlannedChange } from '../interfaces.format.js';
import * as plugins from '../mod.plugins.js';
import { logger, logVerbose } from '../../gitzone.logging.js';

/**
 * Migrates npmextra.json from old namespace keys to new package-scoped keys
 */
const migrateNamespaceKeys = (npmextraJson: any): boolean => {
  let migrated = false;
  const migrations = [
    { oldKey: 'gitzone', newKey: '@git.zone/cli' },
    { oldKey: 'tsdoc', newKey: '@git.zone/tsdoc' },
    { oldKey: 'npmdocker', newKey: '@git.zone/tsdocker' },
    { oldKey: 'npmci', newKey: '@ship.zone/szci' },
    { oldKey: 'szci', newKey: '@ship.zone/szci' },
  ];
  for (const { oldKey, newKey } of migrations) {
    if (npmextraJson[oldKey]) {
      if (!npmextraJson[newKey]) {
        // New key doesn't exist - simple rename
        npmextraJson[newKey] = npmextraJson[oldKey];
      } else {
        // New key exists - merge old into new (old values don't overwrite new)
        npmextraJson[newKey] = {
          ...npmextraJson[oldKey],
          ...npmextraJson[newKey],
        };
      }
      delete npmextraJson[oldKey];
      migrated = true;
    }
  }
  return migrated;
};

/**
 * Migrates npmAccessLevel from @ship.zone/szci to @git.zone/cli.release.accessLevel
 */
const migrateAccessLevel = (npmextraJson: any): boolean => {
  const szciConfig = npmextraJson['@ship.zone/szci'];

  if (!szciConfig?.npmAccessLevel) {
    return false;
  }

  const gitzoneConfig = npmextraJson['@git.zone/cli'] || {};
  if (gitzoneConfig?.release?.accessLevel) {
    delete szciConfig.npmAccessLevel;
    return true;
  }

  if (!npmextraJson['@git.zone/cli']) {
    npmextraJson['@git.zone/cli'] = {};
  }
  if (!npmextraJson['@git.zone/cli'].release) {
    npmextraJson['@git.zone/cli'].release = {};
  }

  npmextraJson['@git.zone/cli'].release.accessLevel = szciConfig.npmAccessLevel;
  delete szciConfig.npmAccessLevel;

  return true;
};

export class NpmextraFormatter extends BaseFormatter {
  get name(): string {
    return 'npmextra';
  }

  async analyze(): Promise<IPlannedChange[]> {
    const changes: IPlannedChange[] = [];
    const npmextraPath = 'npmextra.json';

    // Check if file exists
    const exists = await plugins.smartfs.file(npmextraPath).exists();
    if (!exists) {
      logVerbose('npmextra.json does not exist, skipping');
      return changes;
    }

    // Read current content
    const currentContent = (await plugins.smartfs
      .file(npmextraPath)
      .encoding('utf8')
      .read()) as string;

    // Parse and compute new content
    const npmextraJson = JSON.parse(currentContent);

    // Apply migrations (these are automatic, non-interactive)
    migrateNamespaceKeys(npmextraJson);
    migrateAccessLevel(npmextraJson);

    // Ensure namespaces exist
    if (!npmextraJson['@git.zone/cli']) {
      npmextraJson['@git.zone/cli'] = {};
    }
    if (!npmextraJson['@ship.zone/szci']) {
      npmextraJson['@ship.zone/szci'] = {};
    }

    const newContent = JSON.stringify(npmextraJson, null, 2);

    // Only add change if content differs
    if (newContent !== currentContent) {
      changes.push({
        type: 'modify',
        path: npmextraPath,
        module: this.name,
        description: 'Migrate and format npmextra.json',
        content: newContent,
      });
    }

    return changes;
  }

  async applyChange(change: IPlannedChange): Promise<void> {
    if (change.type !== 'modify' || !change.content) return;

    // Parse the content to check for missing required fields
    const npmextraJson = JSON.parse(change.content);

    // Check for missing required module information
    const expectedRepoInformation: string[] = [
      'projectType',
      'module.githost',
      'module.gitscope',
      'module.gitrepo',
      'module.description',
      'module.npmPackagename',
      'module.license',
    ];

    const interactInstance = new plugins.smartinteract.SmartInteract();
    for (const expectedRepoInformationItem of expectedRepoInformation) {
      if (
        !plugins.smartobject.smartGet(
          npmextraJson['@git.zone/cli'],
          expectedRepoInformationItem,
        )
      ) {
        interactInstance.addQuestions([
          {
            message: `What is the value of ${expectedRepoInformationItem}`,
            name: expectedRepoInformationItem,
            type: 'input',
            default: 'undefined variable',
          },
        ]);
      }
    }

    const answerbucket = await interactInstance.runQueue();
    for (const expectedRepoInformationItem of expectedRepoInformation) {
      const cliProvidedValue = answerbucket.getAnswerFor(
        expectedRepoInformationItem,
      );
      if (cliProvidedValue) {
        plugins.smartobject.smartAdd(
          npmextraJson['@git.zone/cli'],
          expectedRepoInformationItem,
          cliProvidedValue,
        );
      }
    }

    // Write the final content
    const finalContent = JSON.stringify(npmextraJson, null, 2);
    await this.modifyFile(change.path, finalContent);
    logger.log('info', 'Updated npmextra.json');
  }
}