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

export class TemplatesFormatter extends BaseFormatter {
  get name(): string {
    return 'templates';
  }

  async analyze(): Promise<IPlannedChange[]> {
    const changes: IPlannedChange[] = [];
    const project = this.project;
    const projectType = project.gitzoneConfig?.data?.projectType;

    // VSCode template - for all projects
    const vscodeChanges = await this.analyzeTemplate('vscode', [
      { templatePath: '.vscode/settings.json', destPath: '.vscode/settings.json' },
      { templatePath: '.vscode/launch.json', destPath: '.vscode/launch.json' },
    ]);
    changes.push(...vscodeChanges);

    // CI and other templates based on projectType
    switch (projectType) {
      case 'npm':
      case 'wcc':
        const accessLevel = project.gitzoneConfig?.data?.npmciOptions?.npmAccessLevel;
        const ciTemplate = accessLevel === 'public' ? 'ci_default' : 'ci_default_private';
        const ciChanges = await this.analyzeTemplate(ciTemplate, [
          { templatePath: '.gitea/workflows/default_nottags.yaml', destPath: '.gitea/workflows/default_nottags.yaml' },
          { templatePath: '.gitea/workflows/default_tags.yaml', destPath: '.gitea/workflows/default_tags.yaml' },
        ]);
        changes.push(...ciChanges);
        break;

      case 'service':
      case 'website':
        const dockerCiChanges = await this.analyzeTemplate('ci_docker', [
          { templatePath: '.gitea/workflows/docker_nottags.yaml', destPath: '.gitea/workflows/docker_nottags.yaml' },
          { templatePath: '.gitea/workflows/docker_tags.yaml', destPath: '.gitea/workflows/docker_tags.yaml' },
        ]);
        changes.push(...dockerCiChanges);

        const dockerfileChanges = await this.analyzeTemplate('dockerfile_service', [
          { templatePath: 'Dockerfile', destPath: 'Dockerfile' },
          { templatePath: 'dockerignore', destPath: '.dockerignore' },
        ]);
        changes.push(...dockerfileChanges);

        const cliChanges = await this.analyzeTemplate('cli', [
          { templatePath: 'cli.js', destPath: 'cli.js' },
          { templatePath: 'cli.ts.js', destPath: 'cli.ts.js' },
        ]);
        changes.push(...cliChanges);
        break;
    }

    // Update templates based on projectType
    if (projectType === 'website') {
      const websiteChanges = await this.analyzeTemplate('website_update', [
        { templatePath: 'html/index.html', destPath: 'html/index.html' },
      ]);
      changes.push(...websiteChanges);
    } else if (projectType === 'service') {
      const serviceChanges = await this.analyzeTemplate('service_update', []);
      changes.push(...serviceChanges);
    } else if (projectType === 'wcc') {
      const wccChanges = await this.analyzeTemplate('wcc_update', [
        { templatePath: 'html/index.html', destPath: 'html/index.html' },
        { templatePath: 'html/index.ts', destPath: 'html/index.ts' },
      ]);
      changes.push(...wccChanges);
    }

    return changes;
  }

  private async analyzeTemplate(
    templateName: string,
    files: Array<{ templatePath: string; destPath: string }>,
  ): Promise<IPlannedChange[]> {
    const changes: IPlannedChange[] = [];
    const templateDir = plugins.path.join(paths.templatesDir, templateName);

    // Check if template exists
    const templateExists = await plugins.smartfs.directory(templateDir).exists();
    if (!templateExists) {
      logVerbose(`Template ${templateName} not found`);
      return changes;
    }

    for (const file of files) {
      const templateFilePath = plugins.path.join(templateDir, file.templatePath);
      const destFilePath = file.destPath;

      // Check if template file exists
      const fileExists = await plugins.smartfs.file(templateFilePath).exists();
      if (!fileExists) {
        logVerbose(`Template file ${templateFilePath} not found`);
        continue;
      }

      try {
        // Read template content
        const templateContent = (await plugins.smartfs
          .file(templateFilePath)
          .encoding('utf8')
          .read()) as string;

        // Check if destination file exists
        const destExists = await plugins.smartfs.file(destFilePath).exists();
        let currentContent = '';
        if (destExists) {
          currentContent = (await plugins.smartfs
            .file(destFilePath)
            .encoding('utf8')
            .read()) as string;
        }

        // Only add change if content differs
        if (templateContent !== currentContent) {
          changes.push({
            type: destExists ? 'modify' : 'create',
            path: destFilePath,
            module: this.name,
            description: `Apply template ${templateName}/${file.templatePath}`,
            content: templateContent,
          });
        }
      } catch (error) {
        logVerbose(`Failed to read template ${templateFilePath}: ${error.message}`);
      }
    }

    return changes;
  }

  async applyChange(change: IPlannedChange): Promise<void> {
    if (!change.content) return;

    // Ensure destination directory exists
    const destDir = plugins.path.dirname(change.path);
    if (destDir && destDir !== '.') {
      await plugins.smartfs.directory(destDir).recursive().create();
    }

    if (change.type === 'create') {
      await this.createFile(change.path, change.content);
    } else {
      await this.modifyFile(change.path, change.content);
    }
    logger.log('info', `Applied template to ${change.path}`);
  }
}