package model

import (
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestInMemoryRepository_SaveAndGet(t *testing.T) {
	ctx := context.Background()
	r := NewInMemoryRepository()

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

	got, err := r.Get(ctx, "m-1")
	require.NoError(t, err)
	assert.Equal(t, "yolo-v5", got.Name)
	assert.False(t, got.CreatedAt.IsZero())
}

func TestInMemoryRepository_Get_NotFound(t *testing.T) {
	r := NewInMemoryRepository()
	_, err := r.Get(context.Background(), "nope")
	assert.ErrorIs(t, err, ErrNotFound)
}

func TestInMemoryRepository_List_Filter(t *testing.T) {
	ctx := context.Background()
	r := NewInMemoryRepository()

	require.NoError(t, r.Save(ctx, &Model{ID: "1", OwnerUserID: "u1", TargetChip: "kl520", Source: SourceUploaded}))
	require.NoError(t, r.Save(ctx, &Model{ID: "2", OwnerUserID: "u1", TargetChip: "kl720", Source: SourceConverted}))
	require.NoError(t, r.Save(ctx, &Model{ID: "3", OwnerUserID: "u2", TargetChip: "kl520", Source: SourceUploaded}))

	// 依 owner 過濾
	list, err := r.List(ctx, ListFilter{OwnerUserID: "u1"})
	require.NoError(t, err)
	assert.Len(t, list, 2)

	// 依 chip 過濾
	list, err = r.List(ctx, ListFilter{OwnerUserID: "u1", TargetChip: "kl520"})
	require.NoError(t, err)
	assert.Len(t, list, 1)
	assert.Equal(t, "1", list[0].ID)

	// 依 source 過濾
	list, err = r.List(ctx, ListFilter{Source: SourceConverted})
	require.NoError(t, err)
	assert.Len(t, list, 1)

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

func TestInMemoryRepository_Delete_SoftDelete(t *testing.T) {
	ctx := context.Background()
	r := NewInMemoryRepository()

	require.NoError(t, r.Save(ctx, &Model{ID: "1", OwnerUserID: "u"}))
	require.NoError(t, r.Delete(ctx, "1"))

	_, err := r.Get(ctx, "1")
	assert.ErrorIs(t, err, ErrNotFound)

	list, _ := r.List(ctx, ListFilter{OwnerUserID: "u"})
	assert.Empty(t, list)
}

func TestInMemoryRepository_Save_RequiresID(t *testing.T) {
	r := NewInMemoryRepository()
	assert.Error(t, r.Save(context.Background(), &Model{Name: "no-id"}))
}

func TestSizeValidator_Check(t *testing.T) {
	v := NewSizeValidator(100) // 100 MB

	// 剛好在 limit 以內
	assert.NoError(t, v.Check(100*1024*1024))
	assert.NoError(t, v.Check(50*1024*1024))

	// 超過
	err := v.Check(101 * 1024 * 1024)
	assert.ErrorIs(t, err, ErrFileTooLarge)

	// 大小為 0 不是錯誤（Repository 不管）
	assert.NoError(t, v.Check(0))
}

func TestSizeValidator_NoLimit(t *testing.T) {
	v := NewSizeValidator(0) // 0 or negative 視為無限制
	assert.NoError(t, v.Check(1024*1024*1024*10)) // 10 GB
}