import { NextResponse } from 'next/server';
import { dataService } from '@/lib/data-service';
import { TEMPLATE_CATEGORIES } from '@/lib/templates-service';

export async function GET(request: Request) {
  try {
    const { searchParams } = new URL(request.url);
    const id = searchParams.get('id');
    const category = searchParams.get('category');

    if (id) {
      const template = dataService.getMessageTemplateById(id);
      if (!template) {
        return NextResponse.json({ success: false, error: 'Plantilla no encontrada' }, { status: 404 });
      }
      return NextResponse.json({ success: true, template });
    }

    const templates = dataService.getMessageTemplates(category || undefined);
    return NextResponse.json({
      success: true,
      templates,
      categories: TEMPLATE_CATEGORIES,
      total: templates.length,
    });
  } catch (error: any) {
    return NextResponse.json({ success: false, error: error.message }, { status: 500 });
  }
}

export async function PUT(request: Request) {
  try {
    const body = await request.json();
    const { id, content, isActive, title, description } = body;

    if (!id) {
      return NextResponse.json({ success: false, error: 'ID de la plantilla es obligatorio' }, { status: 400 });
    }

    const updated = dataService.updateMessageTemplate(id, {
      ...(content !== undefined && { content }),
      ...(isActive !== undefined && { isActive }),
      ...(title !== undefined && { title }),
      ...(description !== undefined && { description }),
    });

    if (!updated) {
      return NextResponse.json({ success: false, error: 'Plantilla no encontrada' }, { status: 404 });
    }

    return NextResponse.json({
      success: true,
      template: updated,
      message: `Plantilla "${updated.title}" actualizada correctamente.`,
    });
  } catch (error: any) {
    return NextResponse.json({ success: false, error: error.message }, { status: 400 });
  }
}

export async function POST(request: Request) {
  try {
    const body = await request.json();
    const { action, id, templateId, variables } = body;

    if (action === 'reset' && id) {
      const restored = dataService.resetMessageTemplate(id);
      if (!restored) {
        return NextResponse.json({ success: false, error: 'Plantilla no encontrada' }, { status: 404 });
      }
      return NextResponse.json({
        success: true,
        template: restored,
        message: `Plantilla "${restored.title}" restaurada al texto predeterminado de fábrica.`,
      });
    }

    if (action === 'reset_all') {
      const templates = dataService.resetAllMessageTemplates();
      return NextResponse.json({
        success: true,
        templates,
        message: 'Todas las plantillas han sido restauradas a sus textos predeterminados de fábrica.',
      });
    }

    if (action === 'render' && templateId) {
      const rendered = dataService.renderMessageTemplate(templateId, variables || {});
      return NextResponse.json({
        success: true,
        renderedText: rendered,
      });
    }

    return NextResponse.json({ success: false, error: 'Acción no válida' }, { status: 400 });
  } catch (error: any) {
    return NextResponse.json({ success: false, error: error.message }, { status: 400 });
  }
}