//go:build dbtest

// PostgresRepository 模型共享方法（Library 查詢 + model_shares CRUD）的真 DB 整合測試。
//
// build tag `dbtest`：只在帶 `-tags=dbtest` 時編譯/執行（需要 Docker / testcontainers）。
// 執行：
//
//	go test -tags=dbtest ./internal/model/...
//	DOCKER_HOST=tcp://192.168.0.130:2375 TESTCONTAINERS_RYUK_DISABLED=true \
//	  go test -tags=dbtest ./internal/model/...
//
// 涵蓋：可見性 predicate（我的 ∪ public ∪ tenant同org ∪ shared）、enumeration 排除、
// filter / 搜尋 / cursor 分頁、share CRUD、tenant 邊界（空 org 不落 tenant）。
package model

import (
	"context"
	"testing"
	"time"

	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"visiona-backend/internal/db/testsupport"
)

// insertUserWithOrg 寫入一筆帶 org_id 的 user，回傳 user id。org 為空時 org_id=NULL。
func insertUserWithOrg(t *testing.T, tdb *testsupport.TestDB, org string) string {
	t.Helper()
	id := uuid.NewString()
	ctx := context.Background()
	if org == "" {
		_, err := tdb.Pool.Exec(ctx,
			`INSERT INTO users (id, email) VALUES ($1, $2)`, id, id+"@t.local")
		require.NoError(t, err)
		return id
	}
	_, err := tdb.Pool.Exec(ctx,
		`INSERT INTO users (id, email, org_id) VALUES ($1, $2, $3)`, id, id+"@t.local", org)
	require.NoError(t, err)
	return id
}

// saveReady 存一個 ready model（指定 owner + visibility），回傳其 id。
func saveReady(t *testing.T, r *PostgresRepository, owner, visibility, name string) string {
	t.Helper()
	now := time.Now().UTC()
	id := uuid.NewString()
	require.NoError(t, r.Save(context.Background(), &Model{
		ID: id, OwnerUserID: owner, Name: name,
		StorageKey: "models/" + owner + "/" + id + ".nef", FileSize: 1024,
		Source: SourceUploaded, Visibility: visibility, UploadedAt: &now,
	}))
	return id
}

// TestPGShare_LibraryVisibility 驗證 Library predicate（我的 ∪ public ∪ shared，排除別人 private）。
func TestPGShare_LibraryVisibility(t *testing.T) {
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "model_shares", "models", "users")
	r := NewPostgresRepository(tdb.Pool)
	ctx := context.Background()

	me := insertUserWithOrg(t, tdb, "")
	other := insertUserWithOrg(t, tdb, "")

	mine := saveReady(t, r, me, VisibilityPrivate, "mine")
	saveReady(t, r, other, VisibilityPrivate, "otherPriv")
	pub := saveReady(t, r, other, VisibilityPublic, "otherPub")
	shared := saveReady(t, r, other, VisibilityPrivate, "otherShared")
	require.NoError(t, r.UpsertShare(ctx, &ModelShare{ModelID: shared, GranteeUserID: me, Role: "viewer", GrantedBy: other}))

	items, _, err := r.Library(ctx, LibraryQuery{UserID: me, Limit: 100})
	require.NoError(t, err)

	got := map[string]*LibraryItem{}
	for _, it := range items {
		got[it.Model.ID] = it
	}
	assert.Contains(t, got, mine)
	assert.Contains(t, got, pub)
	assert.Contains(t, got, shared)
	assert.Len(t, got, 3, "別人的 private 不應出現")
	assert.True(t, got[shared].SharedWithMe)
	assert.Equal(t, "viewer", got[shared].MyAccess)
}

// TestPGShare_LibraryTenantBoundary 驗證 tenant 可見性：同 org 命中、異 org / 空 org 不命中（SEC-4）。
func TestPGShare_LibraryTenantBoundary(t *testing.T) {
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "model_shares", "models", "users")
	r := NewPostgresRepository(tdb.Pool)
	ctx := context.Background()

	// org_id 是 UUID 欄，用真 UUID（不是 'org-1' 這種字面）。
	org1 := uuid.NewString()
	org2 := uuid.NewString()
	orgOwner := insertUserWithOrg(t, tdb, org1)
	teammate := insertUserWithOrg(t, tdb, org1)
	outsider := insertUserWithOrg(t, tdb, org2)
	noOrg := insertUserWithOrg(t, tdb, "")

	tenantModel := saveReady(t, r, orgOwner, VisibilityTenant, "tenant")

	// 同 org → 可見。UserOrgID 傳 org_id 的 text 形式（對齊 UserContext.OrgID 為字串）。
	items, _, err := r.Library(ctx, LibraryQuery{UserID: teammate, UserOrgID: org1, Limit: 100})
	require.NoError(t, err)
	require.Len(t, items, 1)
	assert.Equal(t, tenantModel, items[0].Model.ID)

	// 異 org → 不可見。
	items, _, err = r.Library(ctx, LibraryQuery{UserID: outsider, UserOrgID: org2, Limit: 100})
	require.NoError(t, err)
	assert.Empty(t, items, "異 org 不應看到 tenant model")

	// 空 org（OIDC 現況）→ 不可見（安全預設，即使 model 是 tenant）。
	items, _, err = r.Library(ctx, LibraryQuery{UserID: noOrg, UserOrgID: "", Limit: 100})
	require.NoError(t, err)
	assert.Empty(t, items, "空 org 不應落 tenant 可見（SEC-4）")
}

// TestPGShare_LibraryFilters 驗證 filter（owned / target_chip / source / visibility / q）。
func TestPGShare_LibraryFilters(t *testing.T) {
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "model_shares", "models", "users")
	r := NewPostgresRepository(tdb.Pool)
	ctx := context.Background()

	me := insertUserWithOrg(t, tdb, "")
	other := insertUserWithOrg(t, tdb, "")
	mine := saveReady(t, r, me, VisibilityPrivate, "yolo-mine")
	pub := saveReady(t, r, other, VisibilityPublic, "resnet-pub")

	// owned=true → 只我的。
	items, _, err := r.Library(ctx, LibraryQuery{UserID: me, Owned: boolPtr(true), Limit: 100})
	require.NoError(t, err)
	require.Len(t, items, 1)
	assert.Equal(t, mine, items[0].Model.ID)

	// owned=false → 只別人。
	items, _, err = r.Library(ctx, LibraryQuery{UserID: me, Owned: boolPtr(false), Limit: 100})
	require.NoError(t, err)
	require.Len(t, items, 1)
	assert.Equal(t, pub, items[0].Model.ID)

	// visibility=public。
	items, _, err = r.Library(ctx, LibraryQuery{UserID: me, Visibility: VisibilityPublic, Limit: 100})
	require.NoError(t, err)
	require.Len(t, items, 1)
	assert.Equal(t, pub, items[0].Model.ID)

	// q=yolo（搜尋 name）。
	items, _, err = r.Library(ctx, LibraryQuery{UserID: me, Q: "yolo", Limit: 100})
	require.NoError(t, err)
	require.Len(t, items, 1)
	assert.Equal(t, mine, items[0].Model.ID)

	// q 含 LIKE 萬用字元應被 escape（不 match 全部）。
	items, _, err = r.Library(ctx, LibraryQuery{UserID: me, Q: "%", Limit: 100})
	require.NoError(t, err)
	assert.Empty(t, items, "字面 '%' 不應 match 任何 model（萬用字元已 escape）")
}

// TestPGShare_LibraryCursorPagination 驗證 cursor 分頁不重不漏（真 DB keyset）。
func TestPGShare_LibraryCursorPagination(t *testing.T) {
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "model_shares", "models", "users")
	r := NewPostgresRepository(tdb.Pool)
	ctx := context.Background()

	me := insertUserWithOrg(t, tdb, "")
	for i := 0; i < 7; i++ {
		saveReady(t, r, me, VisibilityPrivate, "m"+string(rune('a'+i)))
	}

	seen := map[string]bool{}
	var cursor *Cursor
	for page := 0; page < 20; page++ {
		items, hasMore, err := r.Library(ctx, LibraryQuery{
			UserID: me, Limit: 3, Sort: "name", Order: "asc", Cursor: cursor,
		})
		require.NoError(t, err)
		for _, it := range items {
			assert.False(t, seen[it.Model.ID], "分頁重複 %s", it.Model.ID)
			seen[it.Model.ID] = true
		}
		if !hasMore {
			break
		}
		require.NotEmpty(t, items)
		last := items[len(items)-1].Model
		cursor = &Cursor{ID: last.ID, SortValue: last.Name}
	}
	assert.Len(t, seen, 7, "所有 model 應被分頁完整走過一次")
}

// TestPGShare_ShareCRUD 驗證 share Upsert / Get / List / Delete（真 DB）。
func TestPGShare_ShareCRUD(t *testing.T) {
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "model_shares", "models", "users")
	r := NewPostgresRepository(tdb.Pool)
	ctx := context.Background()

	owner := insertUserWithOrg(t, tdb, "")
	bob := insertUserWithOrg(t, tdb, "")
	alice := insertUserWithOrg(t, tdb, "")
	m := saveReady(t, r, owner, VisibilityPrivate, "m")

	require.NoError(t, r.UpsertShare(ctx, &ModelShare{ModelID: m, GranteeUserID: bob, Role: "viewer", GrantedBy: owner}))
	got, err := r.GetShare(ctx, m, bob)
	require.NoError(t, err)
	assert.Equal(t, "viewer", got.Role)

	// upsert 更新 role。
	require.NoError(t, r.UpsertShare(ctx, &ModelShare{ModelID: m, GranteeUserID: bob, Role: "editor", GrantedBy: owner}))
	got, err = r.GetShare(ctx, m, bob)
	require.NoError(t, err)
	assert.Equal(t, "editor", got.Role)

	require.NoError(t, r.UpsertShare(ctx, &ModelShare{ModelID: m, GranteeUserID: alice, Role: "viewer", GrantedBy: owner}))
	shares, err := r.ListShares(ctx, m)
	require.NoError(t, err)
	assert.Len(t, shares, 2)

	require.NoError(t, r.DeleteShare(ctx, m, bob))
	_, err = r.GetShare(ctx, m, bob)
	assert.ErrorIs(t, err, ErrNotFound)
	assert.ErrorIs(t, r.DeleteShare(ctx, m, uuid.NewString()), ErrNotFound)
}

// TestPGShare_LibraryExcludesSoftDeletedAndPending 驗證軟刪 / 未 ready 的 model 不進 Library。
func TestPGShare_LibraryExcludesSoftDeletedAndPending(t *testing.T) {
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "model_shares", "models", "users")
	r := NewPostgresRepository(tdb.Pool)
	ctx := context.Background()

	me := insertUserWithOrg(t, tdb, "")
	// pending（無 UploadedAt）。
	pendingID := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{
		ID: pendingID, OwnerUserID: me, Name: "pending", StorageKey: "k",
		FileSize: 1, Source: SourceUploaded, Visibility: VisibilityPublic,
	}))
	// ready 然後軟刪。
	deleted := saveReady(t, r, me, VisibilityPublic, "deleted")
	require.NoError(t, r.Delete(ctx, deleted))
	// 正常 ready。
	ok := saveReady(t, r, me, VisibilityPrivate, "ok")

	items, _, err := r.Library(ctx, LibraryQuery{UserID: me, Limit: 100})
	require.NoError(t, err)
	require.Len(t, items, 1, "只應列正常 ready 的 model")
	assert.Equal(t, ok, items[0].Model.ID)
}

// TestPGShare_GetWithOwner 驗證 GetWithOwner join 出 owner name（Minor-1，真 DB）。
func TestPGShare_GetWithOwner(t *testing.T) {
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "model_shares", "models", "users")
	r := NewPostgresRepository(tdb.Pool)
	ctx := context.Background()

	// 建帶 name 的 owner。
	ownerID := uuid.NewString()
	_, err := tdb.Pool.Exec(ctx,
		`INSERT INTO users (id, email, name) VALUES ($1, $2, $3)`,
		ownerID, ownerID+"@t.local", "Alice")
	require.NoError(t, err)

	modelID := saveReady(t, r, ownerID, VisibilityPublic, "m")

	m, ownerName, err := r.GetWithOwner(ctx, modelID)
	require.NoError(t, err)
	assert.Equal(t, modelID, m.ID)
	assert.Equal(t, VisibilityPublic, m.Visibility)
	assert.Equal(t, "Alice", ownerName, "GetWithOwner 應 join 出 owner name")

	// owner 無 name → 空字串（COALESCE）。
	noNameOwner := insertUserWithOrg(t, tdb, "")
	m2 := saveReady(t, r, noNameOwner, VisibilityPrivate, "m2")
	_, ownerName2, err := r.GetWithOwner(ctx, m2)
	require.NoError(t, err)
	assert.Equal(t, "", ownerName2, "owner 無 name 時 owner_name 應為空")

	// 不存在 / 已軟刪 → ErrNotFound。
	_, _, err = r.GetWithOwner(ctx, uuid.NewString())
	assert.ErrorIs(t, err, ErrNotFound)
	require.NoError(t, r.Delete(ctx, modelID))
	_, _, err = r.GetWithOwner(ctx, modelID)
	assert.ErrorIs(t, err, ErrNotFound, "已軟刪應回 ErrNotFound")
}

func boolPtr(b bool) *bool { return &b }