package com.krusoe.openapimerge.validate;

import io.swagger.v3.oas.models.Operation;
import io.swagger.v3.oas.models.PathItem;
import org.openapitools.codegen.validation.GenericValidator;
import org.openapitools.codegen.validation.Severity;
import org.openapitools.codegen.validation.ValidationResult;
import org.openapitools.codegen.validation.ValidationRule;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class UniqueOperationIdValidator extends GenericValidator<PathItem> {

    private static Set<String> uniqueOperationIds = new HashSet<>();

    public UniqueOperationIdValidator() {
        super(List.of(ValidationRule.create(Severity.ERROR,
                                            "OperationId should be unique across the whole file, all paths and methods", "OperationId is not unique", UniqueOperationIdValidator::testForUniqueness)));
    }


    static ValidationRule.Result testForUniqueness(Object item) {
        if (item instanceof PathItem) {
            ValidationResult result = new ValidationResult();
            for (Operation operation : ((PathItem) item).readOperations()) {
                if (uniqueOperationIds.contains(operation.getOperationId())) {
                    return new ValidationRule.Fail("Operation is not unique. OperationId: %s Path: %s".formatted(operation.getOperationId(), ((PathItem) item).get$ref()));
                } else {
                    uniqueOperationIds.add(operation.getOperationId());
                }
            }
            return new ValidationRule.Pass();
        }
        throw new IllegalArgumentException();
    }


}