package server

import (
	"encoding/json"
	"fmt"
	"io"
)

func handleEvent(rc io.ReadCloser) error {
	decoder := json.NewDecoder(rc)
	for decoder.More() {
		var event event
		if err := decoder.Decode(&event); err != nil {
			return fmt.Errorf("failed to parse history body data %s", err.Error())
		}

		errors := event.validate()
		if len(errors) != 0 {
			return fmt.Errorf("failed to validate data errors: %v", errors)
		}
	}

	return nil
}

func (e event) validate() map[string]string {
	errors := e.generic.validate()

	err := e.EventId.validate()
	if err != nil {
		errors["eventId"] = err.Error()
	}

	err = e.Severity.validate()
	if err != nil {
		errors["severity"] = err.Error()
	}

	err = e.Hosts.validate()
	if err != nil {
		errors["hosts"] = err.Error()
	}

	for i, h := range e.Hosts.Value {
		err = h.Host.validate()
		if err != nil {
			errors[fmt.Sprintf("hosts[%d].host", i)] = err.Error()
		}

		err = h.Name.validate()
		if err != nil {
			errors[fmt.Sprintf("hosts[%d].name", i)] = err.Error()
		}
	}

	err = e.Tags.validate()
	if err != nil {
		errors["tags"] = err.Error()
	}

	for i, t := range e.Tags.Value {
		err = t.Tag.validate()
		if err != nil {
			errors[fmt.Sprintf("tags[%d].host", i)] = err.Error()
		}

		err = t.Value.validate()
		if err != nil {
			errors[fmt.Sprintf("tags[%d].name", i)] = err.Error()
		}
	}

	return errors
}