package wizard

import (
	"context"
	"strings"
	"testing"

	"gitlab.hive-brain.de/MDietermann/Archduino/internal/module"
	"gitlab.hive-brain.de/MDietermann/Archduino/internal/modules/hello"
	"gitlab.hive-brain.de/MDietermann/Archduino/internal/tui"
)

func TestSyncSelected(t *testing.T) {
	orig := []tui.ModuleChoice{
		{ID: "a", Selected: false},
		{ID: "b", Selected: true},
		{ID: "c", Selected: true},
	}
	got := syncSelected(orig, []string{"a", "c"})
	want := map[string]bool{"a": true, "b": false, "c": true}
	for _, m := range got {
		if m.Selected != want[m.ID] {
			t.Errorf("%s selected=%v, want %v", m.ID, m.Selected, want[m.ID])
		}
	}
	if orig[0].Selected {
		t.Error("orig mutated")
	}
}

func TestRenderPlanWithHello(t *testing.T) {
	reg := module.NewRegistry()
	_ = reg.Register(hello.Module{Path: t.TempDir() + "/marker"})
	out := renderPlanCached(context.Background(), reg, []string{"hello"}, newPlanCache())
	if !strings.Contains(out, "hello") {
		t.Fatalf("output missing hello: %q", out)
	}
}

func TestRenderPlanEmpty(t *testing.T) {
	if got := renderPlanCached(context.Background(), module.NewRegistry(), nil, newPlanCache()); got != "No modules selected." {
		t.Fatalf("got %q", got)
	}
}

func TestParseIntClamp(t *testing.T) {
	cases := map[string]int{
		"":                     1,
		"  ":                   1,
		"abc":                  1,
		"3abc":                 1, // partial match is rejected (strconv.Atoi, not Sscanf)
		"0":                    1,
		"-5":                   1,
		"3":                    3,
		"12":                   12,
		"99999999999999999999": 1, // overflow → fallback
	}
	for in, want := range cases {
		got := parseIntClamp(in, 1)
		if got != want {
			t.Errorf("parseIntClamp(%q) = %d, want %d", in, got, want)
		}
	}
}

func TestRenderPlanCachesDetectAndPlan(t *testing.T) {
	var detects, plans int
	m := countingModule{
		meta:     module.Meta{ID: "count", Name: "Count"},
		onDetect: func() { detects++ },
		onPlan:   func() { plans++ },
	}
	reg := module.NewRegistry()
	if err := reg.Register(m); err != nil {
		t.Fatal(err)
	}
	cache := newPlanCache()
	_ = renderPlanCached(context.Background(), reg, []string{"count"}, cache)
	_ = renderPlanCached(context.Background(), reg, []string{"count"}, cache)
	_ = renderPlanCached(context.Background(), reg, []string{"count"}, cache)
	if detects != 1 || plans != 1 {
		t.Fatalf("want 1 detect and 1 plan, got detects=%d plans=%d", detects, plans)
	}
}

func TestRenderPlanInvalidatesOnSelectionChange(t *testing.T) {
	var detects int
	m := countingModule{
		meta:     module.Meta{ID: "count", Name: "Count"},
		onDetect: func() { detects++ },
	}
	reg := module.NewRegistry()
	_ = reg.Register(m)
	cache := newPlanCache()
	_ = renderPlanCached(context.Background(), reg, []string{"count"}, cache)
	_ = renderPlanCached(context.Background(), reg, []string{}, cache)
	_ = renderPlanCached(context.Background(), reg, []string{"count"}, cache)
	if detects != 2 {
		t.Fatalf("deselect+reselect should re-detect; detects=%d (want 2)", detects)
	}
}

type countingModule struct {
	meta     module.Meta
	onDetect func()
	onPlan   func()
}

func (c countingModule) Meta() module.Meta { return c.meta }
func (c countingModule) Detect(context.Context) (module.State, error) {
	if c.onDetect != nil {
		c.onDetect()
	}
	return nil, nil
}
func (c countingModule) Plan(context.Context, module.State) (module.Plan, error) {
	if c.onPlan != nil {
		c.onPlan()
	}
	return module.Plan{}, nil
}
func (c countingModule) Apply(context.Context, module.Plan, module.Reporter) error { return nil }
func (c countingModule) Verify(context.Context) error                              { return nil }

func TestRunCancelledContextReturnsNoConfirmation(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	cancel()
	_, confirmed, err := Run(ctx, module.NewRegistry(), tui.WizardState{})
	if err != nil && err != context.Canceled {
		t.Fatalf("unexpected err: %v", err)
	}
	if confirmed {
		t.Fatal("confirmed=true on cancelled context")
	}
}