//go:build dbtest

// PostgresRepository 的真 DB 整合測試（DB 接入塊 1，子任務 1.5–1.7）。
//
// build tag `dbtest`：只在帶 `-tags=dbtest` 時編譯/執行（需要 Docker / testcontainers）。
// 預設 `go test ./...`（無 Docker）不會觸碰本檔，維持綠燈。
//
// 執行：
//
//	go test -tags=dbtest ./internal/model/...
//	# 無本機 Docker 時，Orchestrator 在 130 補跑：
//	DOCKER_HOST=tcp://192.168.0.130:2375 TESTCONTAINERS_RYUK_DISABLED=true \
//	  go test -tags=dbtest ./internal/model/...
//
// 涵蓋：
//   - 1.5 unit/邏輯：對齊既有 inmemory_repository_test.go（SaveAndGet、NotFound、List 三 filter、
//     soft delete、Save 需 ID）。
//   - 1.6 integration/真 DB：array round-trip、upsert 保留 CreatedAt、soft-delete 後 List 不含、
//     List filter SQL 正確性、faa_object_key nullable round-trip。
//   - 1.7 邊界：空 List、重複 Save、併發 Save 同 ID、context cancel。
package model

import (
	"context"
	"sync"
	"testing"
	"time"

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

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

// newPGRepo 啟動一次性測試 DB、truncate、確保 demo user 存在，回傳 repo + ownerID。
//
// 每個測試各自呼叫一次（SetupTestDB 內含 t.Cleanup teardown）。owner 用 testsupport
// 的固定 demo user UUID，滿足 models.owner_user_id 的 FK。
func newPGRepo(t *testing.T) (*PostgresRepository, *testsupport.TestDB, string) {
	t.Helper()
	tdb := testsupport.SetupTestDB(t)
	tdb.Truncate(t, "models", "users")
	owner := tdb.EnsureDemoUser(t)
	return NewPostgresRepository(tdb.Pool), tdb, owner
}

// ---------------------------------------------------------------------------
// 1.5 unit/邏輯（對齊 inmemory_repository_test.go 的 case）
// ---------------------------------------------------------------------------

func TestPG_SaveAndGet(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	m := &Model{
		ID:          uuid.NewString(),
		OwnerUserID: owner,
		Name:        "yolo-v5",
		StorageKey:  "models/" + owner + "/m-1.nef",
		FileSize:    1024 * 1024,
		Source:      SourceUploaded,
		TargetChip:  "kl520",
	}
	require.NoError(t, r.Save(ctx, m))

	got, err := r.Get(ctx, m.ID)
	require.NoError(t, err)
	assert.Equal(t, "yolo-v5", got.Name)
	assert.Equal(t, owner, got.OwnerUserID)
	assert.Equal(t, int64(1024*1024), got.FileSize)
	assert.Equal(t, SourceUploaded, got.Source)
	assert.False(t, got.CreatedAt.IsZero())
	assert.False(t, got.UpdatedAt.IsZero())
}

func TestPG_Get_NotFound(t *testing.T) {
	r, _, _ := newPGRepo(t)
	_, err := r.Get(context.Background(), uuid.NewString())
	assert.ErrorIs(t, err, ErrNotFound)
}

func TestPG_List_Filter(t *testing.T) {
	ctx := context.Background()
	r, tdb, owner := newPGRepo(t)

	// 第二個 owner，驗證 owner 過濾。
	owner2 := tdb.InsertUser(t, "", "")

	id1, id2 := uuid.NewString(), uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{ID: id1, OwnerUserID: owner, Name: "a", StorageKey: "k1", Source: SourceUploaded, TargetChip: "kl520"}))
	require.NoError(t, r.Save(ctx, &Model{ID: id2, OwnerUserID: owner, Name: "b", StorageKey: "k2", Source: SourceConverted, TargetChip: "kl720"}))
	require.NoError(t, r.Save(ctx, &Model{ID: uuid.NewString(), OwnerUserID: owner2, Name: "c", StorageKey: "k3", Source: SourceUploaded, TargetChip: "kl520"}))

	// 依 owner 過濾
	list, err := r.List(ctx, ListFilter{OwnerUserID: owner})
	require.NoError(t, err)
	assert.Len(t, list, 2)

	// 依 chip 過濾（owner+chip 複合）
	list, err = r.List(ctx, ListFilter{OwnerUserID: owner, TargetChip: "kl520"})
	require.NoError(t, err)
	require.Len(t, list, 1)
	assert.Equal(t, id1, list[0].ID)

	// 依 source 過濾（不限 owner）
	list, err = r.List(ctx, ListFilter{Source: SourceConverted})
	require.NoError(t, err)
	require.Len(t, list, 1)
	assert.Equal(t, id2, list[0].ID)

	// 無 filter（admin）
	list, err = r.List(ctx, ListFilter{})
	require.NoError(t, err)
	assert.Len(t, list, 3)

	// owner + source 複合
	list, err = r.List(ctx, ListFilter{OwnerUserID: owner, Source: SourceUploaded})
	require.NoError(t, err)
	require.Len(t, list, 1)
	assert.Equal(t, id1, list[0].ID)
}

func TestPG_Delete_SoftDelete(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	id := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{ID: id, OwnerUserID: owner, Name: "x", StorageKey: "k"}))
	require.NoError(t, r.Delete(ctx, id))

	// Get 不到
	_, err := r.Get(ctx, id)
	assert.ErrorIs(t, err, ErrNotFound)

	// List 不含
	list, _ := r.List(ctx, ListFilter{OwnerUserID: owner})
	assert.Empty(t, list)

	// 重複 Delete 回 ErrNotFound
	assert.ErrorIs(t, r.Delete(ctx, id), ErrNotFound)
}

func TestPG_Save_RequiresID(t *testing.T) {
	r, _, owner := newPGRepo(t)
	assert.Error(t, r.Save(context.Background(), &Model{Name: "no-id", OwnerUserID: owner}))
}

// ---------------------------------------------------------------------------
// 1.6 integration/真 DB
// ---------------------------------------------------------------------------

// array round-trip：input_shape INT[] / classes TEXT[] 寫入後讀回相等。
func TestPG_ArrayRoundTrip(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	id := uuid.NewString()
	in := &Model{
		ID:          id,
		OwnerUserID: owner,
		Name:        "with-arrays",
		StorageKey:  "k",
		Source:      SourceConverted,
		InputShape:  []int{1, 3, 224, 224},
		Classes:     []string{"face", "person", "car"},
		Framework:   "onnx",
	}
	require.NoError(t, r.Save(ctx, in))

	got, err := r.Get(ctx, id)
	require.NoError(t, err)
	assert.Equal(t, []int{1, 3, 224, 224}, got.InputShape)
	assert.Equal(t, []string{"face", "person", "car"}, got.Classes)
	assert.Equal(t, "onnx", got.Framework)
}

// 空 / nil array：寫入 nil，讀回應為 nil（對齊 in-memory omitempty 語意）。
func TestPG_ArrayNilRoundTrip(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	id := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{ID: id, OwnerUserID: owner, Name: "no-arrays", StorageKey: "k", Source: SourceUploaded}))

	got, err := r.Get(ctx, id)
	require.NoError(t, err)
	assert.Nil(t, got.InputShape)
	assert.Nil(t, got.Classes)
}

// upsert 保留 CreatedAt：第二次 Save（同 ID、未刪除）保留首次 created_at、更新其他欄位 + updated_at。
func TestPG_Upsert_PreservesCreatedAt(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	id := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{ID: id, OwnerUserID: owner, Name: "v1", StorageKey: "k", Source: SourceUploaded}))
	first, err := r.Get(ctx, id)
	require.NoError(t, err)

	// 稍候，確保 updated_at 會推進。
	time.Sleep(10 * time.Millisecond)

	// 第二次 Save：帶不同（更早 / 不同）的 CreatedAt，應被忽略而保留 first.CreatedAt。
	require.NoError(t, r.Save(ctx, &Model{
		ID:          id,
		OwnerUserID: owner,
		Name:        "v2",
		StorageKey:  "k2",
		Source:      SourceUploaded,
		CreatedAt:   time.Now().Add(-72 * time.Hour).UTC(), // 試圖覆蓋，應被忽略
	}))
	second, err := r.Get(ctx, id)
	require.NoError(t, err)

	assert.Equal(t, "v2", second.Name)
	assert.Equal(t, "k2", second.StorageKey)
	assert.WithinDuration(t, first.CreatedAt, second.CreatedAt, time.Microsecond, "created_at 應保留首次值")
	assert.True(t, second.UpdatedAt.After(first.UpdatedAt) || second.UpdatedAt.Equal(first.UpdatedAt), "updated_at 應推進")
}

// soft-delete 後再 Save 同 ID（復活）：應採用新 created_at（非保留已刪除的舊值）。
func TestPG_Upsert_AfterSoftDelete_ResetsCreatedAt(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	id := uuid.NewString()
	oldCreated := time.Now().Add(-100 * time.Hour).UTC()
	require.NoError(t, r.Save(ctx, &Model{ID: id, OwnerUserID: owner, Name: "v1", StorageKey: "k", Source: SourceUploaded, CreatedAt: oldCreated}))
	require.NoError(t, r.Delete(ctx, id))

	// 復活：deleted_at 仍在 DB（被 EXCLUDED.deleted_at=NULL 清掉），created_at 用新傳入值。
	newCreated := time.Now().UTC()
	require.NoError(t, r.Save(ctx, &Model{ID: id, OwnerUserID: owner, Name: "revived", StorageKey: "k", Source: SourceUploaded, CreatedAt: newCreated}))

	got, err := r.Get(ctx, id)
	require.NoError(t, err)
	assert.Equal(t, "revived", got.Name)
	assert.Nil(t, got.DeletedAt, "復活後不應仍為 deleted")
	assert.WithinDuration(t, newCreated, got.CreatedAt, time.Microsecond, "復活後 created_at 應採新值")
}

// faa_object_key nullable round-trip：有值寫入讀回相等；空值讀回空字串。
func TestPG_FAAObjectKey_NullableRoundTrip(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	// 有值（converted 類）
	idWith := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{
		ID: idWith, OwnerUserID: owner, Name: "converted", StorageKey: "k",
		Source: SourceConverted, FAAObjectKey: "models/" + owner + "/job-1.nef",
	}))
	gotWith, err := r.Get(ctx, idWith)
	require.NoError(t, err)
	assert.Equal(t, "models/"+owner+"/job-1.nef", gotWith.FAAObjectKey)

	// 空值（uploaded 類）— 讀回空字串。
	idWithout := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{ID: idWithout, OwnerUserID: owner, Name: "uploaded", StorageKey: "k", Source: SourceUploaded}))
	gotWithout, err := r.Get(ctx, idWithout)
	require.NoError(t, err)
	assert.Equal(t, "", gotWithout.FAAObjectKey)
}

// source_job_id（UUID nullable）：有值 / 空值 round-trip。
func TestPG_SourceJobID_NullableRoundTrip(t *testing.T) {
	ctx := context.Background()
	r, _, owner := newPGRepo(t)

	jobID := uuid.NewString()
	idWith := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{ID: idWith, OwnerUserID: owner, Name: "j", StorageKey: "k", Source: SourceConverted, SourceJobID: jobID}))
	gotWith, err := r.Get(ctx, idWith)
	require.NoError(t, err)
	assert.Equal(t, jobID, gotWith.SourceJobID)

	idWithout := uuid.NewString()
	require.NoError(t, r.Save(ctx, &Model{ID: idWithout, OwnerUserID: owner, Name: "n", StorageKey: "k", Source: SourceUploaded}))
	gotWithout, err := r.Get(ctx, idWithout)
	require.NoError(t, err)
	assert.Equal(t, "", gotWithout.SourceJobID)
}

// ---------------------------------------------------------------------------
// 1.7 邊界
// ---------------------------------------------------------------------------

// 空 List：乾淨 DB 回空 slice（非 nil error）。
func TestPG_List_Empty(t *testing.T) {
	r, _, owner := newPGRepo(t)
	list, err := r.List(context.Background(), ListFilter{OwnerUserID: owner})
	require.NoError(t, err)
	assert.Empty(t, list)
	assert.NotNil(t, list, "List 應回 non-nil 空 slice")
}

// 重複 Save 同 ID（未刪除）：不報錯，最終為單一列、最後一次內容。
func TestPG_Save_Duplicate(t *testing.T) {
	ctx := context.Background()
	r, tdb, owner := newPGRepo(t)

	id := uuid.NewString()
	for i := 0; i < 5; i++ {
		require.NoError(t, r.Save(ctx, &Model{ID: id, OwnerUserID: owner, Name: "dup", StorageKey: "k", Source: SourceUploaded}))
	}
	assert.Equal(t, 1, tdb.CountRows(t, "models"), "重複 upsert 同 ID 應只有一列")
}

// 併發 Save 同 ID：不應 panic / FK 衝突；最終仍為單一列。
func TestPG_Save_ConcurrentSameID(t *testing.T) {
	ctx := context.Background()
	r, tdb, owner := newPGRepo(t)

	id := uuid.NewString()
	const n = 20
	var wg sync.WaitGroup
	errs := make([]error, n)
	for i := 0; i < n; i++ {
		wg.Add(1)
		go func(i int) {
			defer wg.Done()
			errs[i] = r.Save(ctx, &Model{ID: id, OwnerUserID: owner, Name: "concurrent", StorageKey: "k", Source: SourceUploaded})
		}(i)
	}
	wg.Wait()

	for i, e := range errs {
		assert.NoError(t, e, "併發 Save #%d", i)
	}
	assert.Equal(t, 1, tdb.CountRows(t, "models"), "併發 upsert 同 ID 應只有一列")
}

// context cancel：已取消的 ctx 應讓操作回 error（不 hang、不 panic）。
func TestPG_ContextCancel(t *testing.T) {
	r, _, owner := newPGRepo(t)

	ctx, cancel := context.WithCancel(context.Background())
	cancel() // 立即取消

	err := r.Save(ctx, &Model{ID: uuid.NewString(), OwnerUserID: owner, Name: "x", StorageKey: "k", Source: SourceUploaded})
	assert.Error(t, err, "已取消 ctx 的 Save 應回 error")

	_, err = r.Get(ctx, uuid.NewString())
	assert.Error(t, err, "已取消 ctx 的 Get 應回 error")

	_, err = r.List(ctx, ListFilter{OwnerUserID: owner})
	assert.Error(t, err, "已取消 ctx 的 List 應回 error")
}