package shape

import (
	"context"
	"reflect"
	"strings"
	"testing"
	"unicode/utf8"

	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
)

func TestValidatorAcceptsEverySupportedKind(t *testing.T) {
	kinds := []dnd.LocationOccurrenceKind{dnd.LocationOccurrenceKindVisited, dnd.LocationOccurrenceKindPlanned, dnd.LocationOccurrenceKindRecalled, dnd.LocationOccurrenceKindMentioned}
	occurrences := make([]dnd.LocationOccurrence, len(kinds))
	for index, kind := range kinds {
		occurrences[index] = occurrence(kind)
	}
	result, err := New(Options{}).Validate(context.Background(), request(dnd.LocationOccurrenceList{Occurrences: occurrences}))
	if err != nil || !result.Approved {
		t.Fatalf("Validate() = %#v, %v", result, err)
	}
}

func TestValidatorRejectsRequiredFieldsAndUnsupportedKindWithoutMutation(t *testing.T) {
	value := dnd.LocationOccurrenceList{Occurrences: []dnd.LocationOccurrence{{Name: strings.Repeat("火", 220), Kind: "other", SourceRefs: []source.SourceRef{}}}}
	before := value
	result, err := New(Options{}).Validate(context.Background(), request(value))
	if err != nil || result.Approved || result.ReasonCode != ReasonCode || !strings.Contains(result.Message, "location_id must not be empty") || !strings.Contains(result.Message, "kind is unsupported") {
		t.Fatalf("Validate() = %#v, %v", result, err)
	}
	if !reflect.DeepEqual(value, before) || len(result.Message) > 4096 || !utf8.ValidString(result.Message) {
		t.Fatal("validation mutated value or returned unsafe diagnostics")
	}
	result, err = New(Options{}).Validate(context.Background(), request(dnd.LocationOccurrenceList{}))
	if err != nil || result.Approved || !strings.Contains(result.Message, "occurrences must be present") {
		t.Fatalf("missing list = %#v, %v", result, err)
	}
}

func TestValidatorRegisters(t *testing.T) {
	registry := pipeline.NewValidatorRegistry()
	if err := Register(registry); err != nil {
		t.Fatal(err)
	}
	if got, ok := registry.Spec(Key); !ok || got != Spec() || got.ExecutionClass != contracts.ExecutionClassDeterministic {
		t.Fatalf("registered spec = %#v, ok = %t", got, ok)
	}
	if got := New(Options{}).CheckpointFingerprints(); len(got) != 1 || got[0].Value != policy {
		t.Fatalf("fingerprints = %#v", got)
	}
}

func request(value dnd.LocationOccurrenceList) contracts.TypedValidationRequest[dnd.LocationOccurrenceList] {
	return contracts.TypedValidationRequest[dnd.LocationOccurrenceList]{Value: value}
}
func occurrence(kind dnd.LocationOccurrenceKind) dnd.LocationOccurrence {
	return dnd.LocationOccurrence{LocationID: "location:one", Name: "Moon Gate", Kind: kind, SourceRefs: []source.SourceRef{{SourceID: "session", StartUnitID: 1, EndUnitID: 1}}}
}
