package validators

import (
	"reflect"
	"sort"
	"strings"
	"testing"

	domain "gitea.maximumdirect.net/eric/audita/v3/internal/core/glossary"
	"gitea.maximumdirect.net/eric/audita/v3/internal/core/schema"
	"gitea.maximumdirect.net/eric/audita/v3/internal/framework/proposals"
)

func TestRecognizedTermsDeduplicateAndIncludePlurals(t *testing.T) {
	plural := "Hranks"
	entries := []domain.Entry{{ID: "jesters", Name: "Jesters", Aliases: []string{"Jester", "  "}}, {ID: "hrank", Name: "Hrank", Aliases: []string{"hrank", "Hrank"}, Plural: &plural}, {ID: "lyra", Name: "Lyra"}}
	var got []string
	for _, term := range domain.Vocabulary(entries, nil) {
		got = append(got, term.Spelling)
	}
	sort.Strings(got)
	want := []string{"Hrank", "Hranks", "Jester", "Jesters", "Jesterss", "Lyra", "Lyras"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("got %v want %v", got, want)
	}
	if len(domain.Vocabulary(nil, nil)) != 0 {
		t.Fatal("empty input produced terms")
	}
}

func TestValidateProtectedTermsAppliesToNonGlossaryModule(t *testing.T) {
	req := Request{
		ModuleKey:      "grammar",
		Glossary:       []domain.Entry{{ID: "jesters", Name: "Jesters", Category: "faction"}},
		ProtectedTerms: domain.Vocabulary([]domain.Entry{{ID: "jesters", Name: "Jesters"}}, nil),
		CandidateProposal: []proposals.EnrichedCorrectionProposal{
			{
				CorrectionProposal: proposals.CorrectionProposal{
					TargetSegmentID: 1,
					OriginalText:    "Jesters",
					CorrectedText:   "Gestures",
					Confidence:      0.9,
				},
				ProposalMetadata: proposals.ProposalMetadata{ProposalIndex: 0},
			},
			{
				CorrectionProposal: proposals.CorrectionProposal{TargetSegmentID: 1, OriginalText: "Jesters", CorrectedText: "", Confidence: 0.9},
				ProposalMetadata:   proposals.ProposalMetadata{ProposalIndex: 1},
			},
		},
	}
	res, err := ValidateProtectedTerms(req)
	if err != nil {
		t.Fatalf("validator error: %v", err)
	}
	if len(res.Decisions) != 2 || res.Decisions[0].Approved || res.Decisions[1].Approved || res.Decisions[1].ReasonCode != ReasonProtectedGlossaryTerm {
		t.Fatalf("expected protected-term rejection, got %+v", res.Decisions)
	}
}

func TestValidateProtectedTermsGlossaryStageAllowsProtectedTermSwap(t *testing.T) {
	req := Request{
		ModuleKey: "glossary",
		Glossary:  []domain.Entry{{ID: "jesters", Name: "Jesters", Category: "faction"}},
		CandidateProposal: []proposals.EnrichedCorrectionProposal{
			{
				CorrectionProposal: proposals.CorrectionProposal{
					TargetSegmentID: 1,
					OriginalText:    "gestures",
					CorrectedText:   "Jesters",
					Confidence:      0.9,
				},
				ProposalMetadata: proposals.ProposalMetadata{ProposalIndex: 0},
			},
		},
	}
	res, err := ValidateProtectedTerms(req)
	if err != nil {
		t.Fatalf("validator error: %v", err)
	}
	if len(res.Decisions) != 1 || !res.Decisions[0].Approved {
		t.Fatalf("expected approval for glossary-stage protected term correction, got %+v", res.Decisions)
	}
}

func TestProtectedNameRepetitionRequiresSurvivingIdentityAndSpokenWordScope(t *testing.T) {
	for _, tc := range []struct {
		name, module, before, original, replacement string
		allowed                                     bool
	}{
		{"whole repetition", "spoken_word", "Jesters Jesters arrived", "Jesters Jesters", "Jesters", true},
		{"span deletion", "spoken_word", "Jesters, Jesters arrived", "Jesters, ", "", true},
		{"last reference", "spoken_word", "Jesters arrived", "Jesters ", "", false},
		{"different identity", "spoken_word", "Jesters Jesters arrived", "Jesters Jesters", "Lyra", false},
		{"spelling degraded", "spoken_word", "Jesters Jesters arrived", "Jesters Jesters", "jestERS", false},
		{"grammar unchanged", "grammar", "Jesters Jesters arrived", "Jesters Jesters", "Jesters", false},
	} {
		t.Run(tc.name, func(t *testing.T) {
			req := Request{ModuleKey: tc.module, ReplacementPolicy: proposals.ReplacementPolicyRequireUnique,
				WorkingTranscript: &schema.Transcript{Segments: []schema.Segment{{ID: 1, Text: tc.before}}},
				ProtectedTerms:    domain.Vocabulary([]domain.Entry{{ID: "jesters", Name: "Jesters"}, {ID: "lyra", Name: "Lyra"}}, nil),
				CandidateProposal: []proposals.EnrichedCorrectionProposal{{CorrectionProposal: proposals.CorrectionProposal{TargetSegmentID: 1, OriginalText: tc.original, CorrectedText: tc.replacement, Confidence: 1}}},
			}
			result, err := ValidateProtectedTerms(req)
			if err != nil || len(result.Decisions) != 1 || result.Decisions[0].Approved != tc.allowed {
				t.Fatalf("result=%+v err=%v", result, err)
			}
		})
	}
}

func TestProtectedNameFindingIdentifiesRemovedAlias(t *testing.T) {
	req := Request{
		ModuleKey:           "glossary",
		IndependentEvidence: true,
		ReplacementPolicy:   proposals.ReplacementPolicyReplaceAll,
		WorkingTranscript: &schema.Transcript{Segments: []schema.Segment{
			{ID: 1, Text: "Mira spoke to Captain Mira"},
		}},
		ProtectedTerms: domain.Vocabulary([]domain.Entry{{ID: "mira", Name: "Mira", Aliases: []string{"Captain Mira"}}}, nil),
		CandidateProposal: []proposals.EnrichedCorrectionProposal{{
			CorrectionProposal: proposals.CorrectionProposal{
				TargetSegmentID: 1, OriginalText: "Captain Mira", CorrectedText: "the captain", Confidence: 0.9,
			},
		}},
	}
	result, err := ValidateProtectedTerms(req)
	if err != nil || len(result.Decisions) != 1 {
		t.Fatalf("result=%+v err=%v", result, err)
	}
	decision := result.Decisions[0]
	if decision.Approved || decision.ReasonCode != ReasonProtectedGlossaryTerm || !strings.Contains(decision.Message, `"Captain Mira"`) {
		t.Fatalf("finding did not identify the removed alias: %+v", decision)
	}
}