package validators

import (
	"testing"
)

func TestBuiltInRegistryRegistersAllKeys(t *testing.T) {
	r := NewBuiltInRegistry()
	for _, key := range []string{
		KeyConfidenceThreshold,
		KeyOriginalTextPresence,
		KeyNonEmptyCorrectedText,
		KeyNoEffect,
		KeyProtectedTerms,
		KeySpokenFormPlausibility,
		KeyMeaningReversalReview,
		KeyEditorialReview,
		KeyGrammarReview,
		KeySpokenWordReview,
	} {
		def, ok := r.Lookup(key)
		if !ok {
			t.Fatalf("expected validator key %q to be registered", key)
		}
		v, err := def.Build()
		if err != nil {
			t.Fatalf("build validator %q: %v", key, err)
		}
		if v.Name() != key {
			t.Fatalf("expected validator name %q, got %q", key, v.Name())
		}
	}
}

func TestBuiltInRegistryUnknownKeyFails(t *testing.T) {
	r := NewBuiltInRegistry()
	if _, err := r.MustBuild("missing"); err == nil {
		t.Fatalf("expected unknown validator key error")
	}
}

func TestBuiltInChainKeysResolveForProductionModules(t *testing.T) {
	for _, moduleKey := range []string{"glossary", "homophones", "spoken_word", "grammar"} {
		keys, err := BuiltInChainKeys(moduleKey)
		if err != nil {
			t.Fatalf("resolve keys for %q: %v", moduleKey, err)
		}
		if len(keys) == 0 {
			t.Fatalf("expected non-empty chain for %q", moduleKey)
		}
	}
}

func TestResolveBuiltInChainUsesRegisteredKeys(t *testing.T) {
	r := NewBuiltInRegistry()
	for _, moduleKey := range []string{"glossary", "homophones", "spoken_word", "grammar"} {
		chain, err := ResolveBuiltInChain(moduleKey, r)
		if err != nil {
			t.Fatalf("resolve chain for %q: %v", moduleKey, err)
		}
		if len(chain) == 0 {
			t.Fatalf("expected non-empty chain for %q", moduleKey)
		}
		for _, v := range chain {
			if v == nil {
				t.Fatalf("nil validator in %q chain", moduleKey)
			}
		}
	}
}

func TestBuiltInChainUnknownModuleFails(t *testing.T) {
	if _, err := BuiltInChainKeys("unknown"); err == nil {
		t.Fatalf("expected unknown module chain failure")
	}
	if _, err := ResolveBuiltInChain("unknown", NewBuiltInRegistry()); err == nil {
		t.Fatalf("expected unknown module chain failure")
	}
}