package ckconfig_test

import (
	"bytes"
	"context"
	"strings"
	"testing"

	commandkit "gitea.maximumdirect.net/eric/CommandKit"
	"gitea.maximumdirect.net/eric/CommandKit/integrations/ckconfig"
)

func TestParentHelpDiscoversMetadataOnlyGroups(t *testing.T) {
	leaf := commandkit.Group("notes", "Read notes metadata.")
	parent := commandkit.Group("topics", "Browse topic metadata.", leaf)
	app, err := commandkit.New(commandkit.Identity{Name: "example"}, parent)
	if err != nil {
		t.Fatal(err)
	}
	loads := 0
	if err := ckconfig.RegisterConfig(app, ckconfig.ConfigSuite[struct{}]{Scopes: []ckconfig.ConfigScope[struct{}]{{Name: "app", Operations: []ckconfig.ConfigOperation{ckconfig.ConfigValidate}, Acquire: func(context.Context, ckconfig.ConfigRequest, struct{}) (commandkit.Acquired[ckconfig.ConfigView], error) {
		loads++
		return commandkit.Acquired[ckconfig.ConfigView]{}, nil
	}}}}); err != nil {
		t.Fatal(err)
	}
	for _, tc := range []struct {
		args    []string
		content string
	}{
		{nil, "Browse topic metadata."},
		{[]string{"topics"}, "Read notes metadata."},
		{[]string{"topics", "--help"}, "Read notes metadata."},
		{[]string{"help", "topics"}, "Read notes metadata."},
		{[]string{"topics", "notes"}, "Read notes metadata."},
		{[]string{"help", "topics", "notes"}, "Read notes metadata."},
	} {
		var out bytes.Buffer
		result := app.Execute(context.Background(), tc.args, commandkit.Streams{Out: &out})
		if result.Kind != commandkit.OutcomeSuccess || !strings.Contains(out.String(), tc.content) || loads != 0 {
			t.Fatalf("%v: result=%#v output=%q loads=%d", tc.args, result, out.String(), loads)
		}
		if len(tc.args) == 1 && (!strings.Contains(out.String(), "Available Commands:") || !strings.Contains(out.String(), "[command]")) {
			t.Fatalf("missing child inventory/usage: %q", out.String())
		}
	}
	var diagnostic bytes.Buffer
	result := app.Execute(context.Background(), []string{"topics", "unknown"}, commandkit.Streams{Err: &diagnostic})
	if result.Kind != commandkit.OutcomeUsage || !strings.Contains(diagnostic.String(), "[command]") {
		t.Fatalf("result=%#v diagnostic=%q", result, diagnostic.String())
	}
}