/**
 * ESLint rule to enforce ViewDataBuilder import paths
 *
 * ViewDataBuilders in lib/builders/view-data/ must:
 * 1. Import DTO types from lib/types/generated/
 * 2. Import ViewData types from lib/view-data/
 */

module.exports = {
  meta: {
    type: 'problem',
    docs: {
      description: 'Enforce ViewDataBuilder import paths',
      category: 'Builders',
      recommended: true,
    },
    fixable: null,
    schema: [],
    messages: {
      invalidDtoImport: 'ViewDataBuilders must import DTO types from lib/types/generated/, not from {{importPath}}',
      invalidViewDataImport: 'ViewDataBuilders must import ViewData types from lib/view-data/, not from {{importPath}}',
      noViewModelsInBuilders: 'ViewDataBuilders must not import ViewModels. ViewModels are client-only logic wrappers. Builders should only produce plain ViewData.',
      missingDtoImport: 'ViewDataBuilders must import DTO types from lib/types/generated/',
      missingViewDataImport: 'ViewDataBuilders must import ViewData types from lib/view-data/',
    },
  },

  create(context) {
    const filename = context.getFilename();
    const isInViewDataBuilders = filename.includes('/lib/builders/view-data/');
    
    if (!isInViewDataBuilders) return {};

    let hasDtoImport = false;
    let hasViewDataImport = false;
    let dtoImportPath = null;
    let viewDataImportPath = null;

    return {
      ImportDeclaration(node) {
        const importPath = node.source.value;
        
        // Check for DTO imports (should be from lib/types/generated/)
        if (importPath.includes('/lib/types/')) {
          if (!importPath.includes('/lib/types/generated/')) {
            dtoImportPath = importPath;
            context.report({
              node,
              messageId: 'invalidDtoImport',
              data: { importPath },
            });
          } else {
            hasDtoImport = true;
          }
        }
        
        // Check for ViewData imports (should be from lib/view-data/)
        if (importPath.includes('/lib/view-data/')) {
          hasViewDataImport = true;
          viewDataImportPath = importPath;
        }
      },

      'Program:exit'() {
        if (!hasDtoImport) {
          context.report({
            node: context.getSourceCode().ast,
            messageId: 'missingDtoImport',
          });
        }

        if (!hasViewDataImport) {
          context.report({
            node: context.getSourceCode().ast,
            messageId: 'missingViewDataImport',
          });
        }
      },
    };
  },
};