package db

import (
	"errors"
	"testing"

	"git.wntrmute.dev/kyle/mcias/internal/model"
)

func TestWebAuthnCRUD(t *testing.T) {
	database := openTestDB(t)

	acct, err := database.CreateAccount("webauthnuser", model.AccountTypeHuman, "hash")
	if err != nil {
		t.Fatalf("create account: %v", err)
	}

	// Empty state.
	has, err := database.HasWebAuthnCredentials(acct.ID)
	if err != nil {
		t.Fatalf("has credentials: %v", err)
	}
	if has {
		t.Error("expected no credentials")
	}

	count, err := database.CountWebAuthnCredentials(acct.ID)
	if err != nil {
		t.Fatalf("count credentials: %v", err)
	}
	if count != 0 {
		t.Errorf("expected 0 credentials, got %d", count)
	}

	creds, err := database.GetWebAuthnCredentials(acct.ID)
	if err != nil {
		t.Fatalf("get credentials (empty): %v", err)
	}
	if len(creds) != 0 {
		t.Errorf("expected 0 credentials, got %d", len(creds))
	}

	// Create credential.
	cred := &model.WebAuthnCredential{
		AccountID:         acct.ID,
		Name:              "Test Key",
		CredentialIDEnc:   []byte("enc-cred-id"),
		CredentialIDNonce: []byte("nonce-cred-id"),
		PublicKeyEnc:      []byte("enc-pubkey"),
		PublicKeyNonce:    []byte("nonce-pubkey"),
		AAGUID:            "2fc0579f811347eab116bb5a8db9202a",
		SignCount:         0,
		Discoverable:      true,
		Transports:        "usb,nfc",
	}
	id, err := database.CreateWebAuthnCredential(cred)
	if err != nil {
		t.Fatalf("create credential: %v", err)
	}
	if id == 0 {
		t.Error("expected non-zero credential ID")
	}

	// Now has credentials.
	has, err = database.HasWebAuthnCredentials(acct.ID)
	if err != nil {
		t.Fatalf("has credentials after create: %v", err)
	}
	if !has {
		t.Error("expected credentials to exist")
	}

	count, err = database.CountWebAuthnCredentials(acct.ID)
	if err != nil {
		t.Fatalf("count after create: %v", err)
	}
	if count != 1 {
		t.Errorf("expected 1 credential, got %d", count)
	}

	// Get by ID.
	got, err := database.GetWebAuthnCredentialByID(id)
	if err != nil {
		t.Fatalf("get by ID: %v", err)
	}
	if got.Name != "Test Key" {
		t.Errorf("Name = %q, want %q", got.Name, "Test Key")
	}
	if !got.Discoverable {
		t.Error("expected discoverable=true")
	}
	if got.Transports != "usb,nfc" {
		t.Errorf("Transports = %q, want %q", got.Transports, "usb,nfc")
	}
	if got.AccountID != acct.ID {
		t.Errorf("AccountID = %d, want %d", got.AccountID, acct.ID)
	}

	// Get list.
	creds, err = database.GetWebAuthnCredentials(acct.ID)
	if err != nil {
		t.Fatalf("get credentials: %v", err)
	}
	if len(creds) != 1 {
		t.Fatalf("expected 1 credential, got %d", len(creds))
	}
	if creds[0].ID != id {
		t.Errorf("credential ID = %d, want %d", creds[0].ID, id)
	}

	// Update sign count.
	if err := database.UpdateWebAuthnSignCount(id, 5); err != nil {
		t.Fatalf("update sign count: %v", err)
	}
	got, _ = database.GetWebAuthnCredentialByID(id)
	if got.SignCount != 5 {
		t.Errorf("SignCount = %d, want 5", got.SignCount)
	}

	// Update last used.
	if err := database.UpdateWebAuthnLastUsed(id); err != nil {
		t.Fatalf("update last used: %v", err)
	}
	got, _ = database.GetWebAuthnCredentialByID(id)
	if got.LastUsedAt == nil {
		t.Error("expected LastUsedAt to be set")
	}
}

func TestWebAuthnDeleteOwnership(t *testing.T) {
	database := openTestDB(t)

	acct1, _ := database.CreateAccount("wa1", model.AccountTypeHuman, "hash")
	acct2, _ := database.CreateAccount("wa2", model.AccountTypeHuman, "hash")

	cred := &model.WebAuthnCredential{
		AccountID:         acct1.ID,
		Name:              "Key",
		CredentialIDEnc:   []byte("enc"),
		CredentialIDNonce: []byte("nonce"),
		PublicKeyEnc:      []byte("enc"),
		PublicKeyNonce:    []byte("nonce"),
	}
	id, _ := database.CreateWebAuthnCredential(cred)

	// Delete with wrong owner should fail.
	err := database.DeleteWebAuthnCredential(id, acct2.ID)
	if !errors.Is(err, ErrNotFound) {
		t.Errorf("expected ErrNotFound for wrong owner, got %v", err)
	}

	// Delete with correct owner succeeds.
	if err := database.DeleteWebAuthnCredential(id, acct1.ID); err != nil {
		t.Fatalf("delete with correct owner: %v", err)
	}

	// Verify gone.
	_, err = database.GetWebAuthnCredentialByID(id)
	if !errors.Is(err, ErrNotFound) {
		t.Errorf("expected ErrNotFound after delete, got %v", err)
	}
}

func TestWebAuthnDeleteAdmin(t *testing.T) {
	database := openTestDB(t)

	acct, _ := database.CreateAccount("waadmin", model.AccountTypeHuman, "hash")
	cred := &model.WebAuthnCredential{
		AccountID:         acct.ID,
		Name:              "Key",
		CredentialIDEnc:   []byte("enc"),
		CredentialIDNonce: []byte("nonce"),
		PublicKeyEnc:      []byte("enc"),
		PublicKeyNonce:    []byte("nonce"),
	}
	id, _ := database.CreateWebAuthnCredential(cred)

	// Admin delete (no ownership check).
	if err := database.DeleteWebAuthnCredentialAdmin(id); err != nil {
		t.Fatalf("admin delete: %v", err)
	}

	// Non-existent should return ErrNotFound.
	if err := database.DeleteWebAuthnCredentialAdmin(id); !errors.Is(err, ErrNotFound) {
		t.Errorf("expected ErrNotFound for non-existent, got %v", err)
	}
}

func TestWebAuthnDeleteAll(t *testing.T) {
	database := openTestDB(t)

	acct, _ := database.CreateAccount("wada", model.AccountTypeHuman, "hash")

	for i := range 3 {
		cred := &model.WebAuthnCredential{
			AccountID:         acct.ID,
			Name:              "Key",
			CredentialIDEnc:   []byte{byte(i)},
			CredentialIDNonce: []byte("n"),
			PublicKeyEnc:      []byte{byte(i)},
			PublicKeyNonce:    []byte("n"),
		}
		if _, err := database.CreateWebAuthnCredential(cred); err != nil {
			t.Fatalf("create %d: %v", i, err)
		}
	}

	deleted, err := database.DeleteAllWebAuthnCredentials(acct.ID)
	if err != nil {
		t.Fatalf("delete all: %v", err)
	}
	if deleted != 3 {
		t.Errorf("expected 3 deleted, got %d", deleted)
	}

	count, _ := database.CountWebAuthnCredentials(acct.ID)
	if count != 0 {
		t.Errorf("expected 0 after delete all, got %d", count)
	}
}

func TestWebAuthnCascadeDelete(t *testing.T) {
	database := openTestDB(t)

	acct, _ := database.CreateAccount("wacascade", model.AccountTypeHuman, "hash")
	cred := &model.WebAuthnCredential{
		AccountID:         acct.ID,
		Name:              "Key",
		CredentialIDEnc:   []byte("enc"),
		CredentialIDNonce: []byte("nonce"),
		PublicKeyEnc:      []byte("enc"),
		PublicKeyNonce:    []byte("nonce"),
	}
	id, _ := database.CreateWebAuthnCredential(cred)

	// Delete the account — credentials should cascade.
	if err := database.UpdateAccountStatus(acct.ID, model.AccountStatusDeleted); err != nil {
		t.Fatalf("update status: %v", err)
	}

	// The credential should still be retrievable (soft delete on account doesn't cascade).
	// But if we hard-delete via SQL, the FK cascade should clean up.
	// For now just verify the credential still exists after a status change.
	got, err := database.GetWebAuthnCredentialByID(id)
	if err != nil {
		t.Fatalf("get after account status change: %v", err)
	}
	if got.ID != id {
		t.Errorf("credential ID = %d, want %d", got.ID, id)
	}
}