package ginext

import (
	"bringman.de/common/shared/bmerror"
	"github.com/gin-gonic/gin"
	"github.com/go-playground/validator/v10"
	"net/http"
)

func ShouldBind(g *gin.Context, uri interface{}, query interface{}, body interface{}) error {
	if uri != nil {
		if err := g.ShouldBindUri(uri); err != nil {
			if vErrs, ok := err.(validator.ValidationErrors); ok {
				return bmerror.Wrap(vErrs, "Could not validate request parameter (uri)").
					Errs("inner", convertValidationErrors(vErrs)).
					WithType(bmerror.ErrQueryValidation).
					WithStatuscode(http.StatusBadRequest).
					Build()
			} else {
				return bmerror.Wrap(err, "Could not parse request parameter (uri)").
					WithType(bmerror.ErrQueryParse).
					WithStatuscode(http.StatusBadRequest).
					Build()
			}
		}
	}
	if query != nil {
		if err := g.ShouldBindQuery(query); err != nil {
			if vErrs, ok := err.(validator.ValidationErrors); ok {
				return bmerror.Wrap(vErrs, "Could not validate request parameter (query)").
					Errs("inner", convertValidationErrors(vErrs)).
					WithType(bmerror.ErrQueryValidation).
					WithStatuscode(http.StatusBadRequest).
					Build()
			} else {
				return bmerror.Wrap(err, "Could not parse request parameter (query)").
					WithType(bmerror.ErrQueryParse).
					WithStatuscode(http.StatusBadRequest).
					Build()
			}
		}
	}
	if body != nil {
		if err := g.ShouldBindJSON(body); err != nil {
			if vErrs, ok := err.(validator.ValidationErrors); ok {
				return bmerror.Wrap(vErrs, "Could not validate request parameter (body:json)").
					Errs("inner", convertValidationErrors(vErrs)).
					WithType(bmerror.ErrQueryValidation).
					WithStatuscode(http.StatusBadRequest).
					Build()
			} else {
				return bmerror.Wrap(err, "Could not parse request parameter (body:json)").
					WithType(bmerror.ErrQueryParse).
					WithStatuscode(http.StatusBadRequest).
					Build()
			}
		}
	}

	return nil
}

func convertValidationErrors(e validator.ValidationErrors) []error {
	r := make([]error, 0, len(e))
	for _, v := range e {
		r = append(r, v)
	}
	return r
}