package membank

import (
	"strings"
	"testing"

	"textmachine/backend/internal/lang"
)

// render_test.go: the injection RENDERER fixtures — the exact bytes the bank puts on the wire for
// each role. ruTX is the ru target wire-text (pair-14 §2: the strings live in lang/data/injection.txt).

func ruTX() lang.InjectionTexts { return lang.InjectionTextsFor("ru") }

func TestRenderGlossaryBlock(t *testing.T) {
	confirmed := PickedEntry{entry: &entry{src: "阿Q", dst: "А-кью", status: "approved"}, Disp: Confirmed}
	ambiguous := PickedEntry{entry: &entry{src: "小D", dst: "Малыш Дэ", status: "auto"}, Disp: Ambiguous}
	emptyDst := PickedEntry{entry: &entry{src: "鈴木", dst: "", status: "auto"}, Disp: Ambiguous}

	block := RenderGlossaryBlock([]PickedEntry{confirmed, ambiguous, emptyDst}, ruTX())
	if !strings.Contains(block, "阿Q → А-кью") {
		t.Errorf("confirmed line missing: %q", block)
	}
	if !strings.Contains(block, "小D → Малыш Дэ  ⟨проверить⟩") {
		t.Errorf("ambiguous line missing its unverified tag: %q", block)
	}
	if strings.Contains(block, "鈴木") {
		t.Errorf("empty-dst candidate should be skipped (nothing to inject): %q", block)
	}
	// Nothing to inject → empty block (better nothing).
	if RenderGlossaryBlock(nil, ruTX()) != "" {
		t.Error("empty selection must render an empty block")
	}
	if RenderGlossaryBlock([]PickedEntry{emptyDst}, ruTX()) != "" {
		t.Error("only-empty-dst selection must render an empty block")
	}
}

// TestDC3GenderInjection pins the DC3 gender constraint annotation on the editor block (WS5 §5(б)): a
// gendered CONFIRMED term carries a gender directive; a genderless term does not (byte-identical line).
func TestDC3GenderInjection(t *testing.T) {
	mk := func(gender string) []PickedEntry {
		return []PickedEntry{{entry: &entry{src: "方源", dst: "Фан Юань", status: "approved", gender: gender}, Via: "方源", Disp: Confirmed}}
	}
	male := RenderEditorConstraintBlock(mk("male"), ruTX())
	if !strings.Contains(male, "方源 → «Фан Юань» (муж.") {
		t.Fatalf("male term must carry a masculine directive, got:\n%s", male)
	}
	hidden := RenderEditorConstraintBlock(mk("hidden"), ruTX())
	if !strings.Contains(hidden, "пол СКРЫТ") {
		t.Fatalf("hidden term must carry the gender-avoidance mandate, got:\n%s", hidden)
	}
	none := RenderEditorConstraintBlock(mk(""), ruTX())
	if !strings.HasSuffix(none, "«Фан Юань»") {
		t.Fatalf("a genderless term must have NO gender note (line ends at the dst), got:\n%s", none)
	}
}

// TestZeroValuePickedEntryAndBankDoNotPanic pins the pack-16 tail: both types are EXPORTED with exported
// fields, so a caller outside this package can construct a zero value whose private row/matcher is nil.
// Every consumer used to nil-deref on it — a panic in a paid run. The contract is now "a row-less record is
// skipped; a matcher-less bank selects nothing", which cannot change a real bank's behaviour because
// Materialize and Select always populate both.
func TestZeroValuePickedEntryAndBankDoNotPanic(t *testing.T) {
	zero := []PickedEntry{{Via: "x", Disp: Confirmed}}
	tx := lang.InjectionTextsFor("ru")
	if got := RenderGlossaryBlock(zero, tx); got != "" {
		t.Fatalf("a row-less record must render nothing, got %q", got)
	}
	if got := RenderEditorConstraintBlock(zero, tx); got != "" {
		t.Fatalf("a row-less record must render no constraint, got %q", got)
	}
	var b Bank
	if misses := b.Postcheck(zero, "любой текст"); !misses.Empty() {
		t.Fatalf("a row-less record must produce no post-check miss, got %+v", misses)
	}
	if sel := b.Select("непустой текст для матчера", 1, nil, 100); len(sel.Injected) != 0 {
		t.Fatalf("a zero-value bank must select nothing, got %+v", sel.Injected)
	}
}

// TestEditorSectionFollowsProvenance pins the S7 fix (cold-run session, backlog 19): the editor's two
// sections separate WHO SIGNED a rendering, not how confident the match was. dispositionFor downgrades an
// approved row matched by a collision-prone key (short + purely phonetic) to AMBIGUOUS — a statement about
// the firing, not the authority — and routing the section on it filed the owner's own signature under
// «никем не утверждено». Invisible on zh (Han keys anchor at 2), structural on any phonetic source.
func TestEditorSectionFollowsProvenance(t *testing.T) {
	signedShort := PickedEntry{entry: &entry{src: "リン", dst: "Рин", status: "approved", gender: "female"}, Via: "りん", Disp: Ambiguous}
	unsigned := PickedEntry{entry: &entry{src: "方源", dst: "Фан Юань", status: "draft"}, Via: "方源", Disp: Ambiguous}

	block := RenderEditorConstraintBlock([]PickedEntry{signedShort, unsigned}, ruTX())
	tx := ruTX()
	canon, rest, ok := strings.Cut(block, tx.EditorUnverifiedHeader)
	if !ok {
		t.Fatalf("both sections must be present, got:\n%s", block)
	}
	if !strings.Contains(canon, "リン → «Рин»") {
		t.Errorf("an owner-SIGNED row belongs to the canon section, got:\n%s", canon)
	}
	if strings.Contains(canon, "方源") {
		t.Errorf("an unsigned row must not be canon, got:\n%s", canon)
	}
	if !strings.Contains(rest, "方源 → «Фан Юань»") || !strings.Contains(rest, tx.UnverifiedMarker) {
		t.Errorf("the unsigned row must be in the marked section, got:\n%s", rest)
	}
	if strings.Contains(canon, tx.UnverifiedMarker) {
		t.Errorf("the canon section must carry no unverified marker, got:\n%s", canon)
	}
	// The gender DIRECTIVE still keys on the match, not on the signature: on a collision-prone firing the
	// row may not be about the entity on the page, and «женский род» would then be an instruction to get
	// it wrong. Authority moves the section; confidence keeps the directive.
	if strings.Contains(canon, tx.GenderFemale) {
		t.Errorf("a collision-prone firing must carry no gender directive, got:\n%s", canon)
	}
	// The disposition itself is UNCHANGED — it still guards the post-check and the translator block's
	// ⟨проверить⟩ tag. Only the section moved.
	if signedShort.Disp != Ambiguous {
		t.Fatal("the fix must not upgrade the disposition; it only re-routes the section")
	}
	if draft := RenderGlossaryBlock([]PickedEntry{signedShort}, ruTX()); !strings.Contains(draft, tx.UnverifiedMarker) {
		t.Errorf("the TRANSLATOR block still marks a collision-prone match unverified, got: %q", draft)
	}
}