package billing

import (
	"context"
	"errors"
	"fmt"
	"strings"
	"testing"
)

func TestDefaultPlanFeaturesStarterBYOK(t *testing.T) {
	m := DefaultPlanFeatures("Starter", false)
	if !m["catalog.products.process_ai_titles"] {
		t.Fatal("Starter should allow AI titles")
	}
	if m["integrations.ai.byok"] || m["capability.byok"] {
		t.Fatal("Starter should deny BYOK")
	}
}

func TestDefaultPlanFeaturesGrowthAllOn(t *testing.T) {
	m := DefaultPlanFeatures("Growth", false)
	for _, k := range FeatureCatalogKeys {
		if !m[k] {
			t.Fatalf("Growth should allow %s", k)
		}
	}
}

func TestPlanAllowsOverrideFalseWins(t *testing.T) {
	overrides := map[string]bool{"settings.api_keys": false}
	if PlanAllowsFeature("Growth", false, overrides, "settings.api_keys") {
		t.Fatal("override false should win on Growth")
	}
}

func TestResolveFeaturesGlobalFeatureOff(t *testing.T) {
	gates := FeatureGatesView{
		Sections: map[string]bool{},
		Features: map[string]bool{"capability.byok": false},
	}
	features := ResolveFeatures("Business", false, nil, gates)
	if features["capability.byok"] {
		t.Fatal("global feature kill-switch should win")
	}
}

func TestSparseDefaultOverridesFree(t *testing.T) {
	sparse := SparseDefaultOverrides("Free", false)
	if sparse["catalog.products.process_ai_titles"] != false {
		t.Fatal("expected sparse false for AI titles")
	}
	if _, ok := sparse["catalog.products"]; ok {
		t.Fatal("ON keys should not appear in sparse overrides")
	}
	if len(SparseDefaultOverrides("Acme", true)) != 0 {
		t.Fatal("custom sparse should be empty")
	}
}

func TestValidateFeatureOverridesRejectsUnknown(t *testing.T) {
	err := validateFeatureOverrides(map[string]bool{"not.a.real.key": true})
	if !errors.Is(err, ErrUnknownFeatureKey) {
		t.Fatalf("want ErrUnknownFeatureKey, got %v", err)
	}
}

func TestListFeaturesCatalogComplete(t *testing.T) {
	s := &Service{}
	list, err := s.ListFeatures(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	if len(list) != len(FeatureCatalogKeys) {
		t.Fatalf("got %d want %d", len(list), len(FeatureCatalogKeys))
	}
	if list[0].Section == "" {
		t.Fatal("section required")
	}
}

func TestAssertFeatureErrorWraps(t *testing.T) {
	err := fmt.Errorf("%w: %s", ErrFeatureDisabled, "marketing.campaigns.generate_ai")
	if !errors.Is(err, ErrFeatureDisabled) {
		t.Fatal(err)
	}
	if !strings.Contains(err.Error(), "marketing.campaigns.generate_ai") {
		t.Fatal(err)
	}
}