package postgres

import (
	"context"
	"crypto/rand"
	"encoding/binary"
	"testing"

	"telesrv/internal/domain"
)

// TestAIComposeStoreRoundTripPostgres 验证自定义 AI tone 与保存列表持久化，
// 含 creator/saved 视角、slug/id 解析和删除级联。
func TestAIComposeStoreRoundTripPostgres(t *testing.T) {
	pool := testPool(t)
	ctx := context.Background()
	store := NewAIComposeStore(pool)
	users := NewUserStore(pool)
	suffix := randomSuffix(t)

	owner, err := users.Create(ctx, domain.User{AccessHash: randomAIComposeID(), Phone: "+1771" + suffix + "01", FirstName: "AIOwner"})
	if err != nil {
		t.Fatalf("create owner: %v", err)
	}
	other, err := users.Create(ctx, domain.User{AccessHash: randomAIComposeID(), Phone: "+1771" + suffix + "02", FirstName: "AISaver"})
	if err != nil {
		t.Fatalf("create other: %v", err)
	}
	t.Cleanup(func() {
		_, _ = pool.Exec(ctx, "DELETE FROM users WHERE id = ANY($1)", []int64{owner.ID, other.ID})
	})

	tone := domain.AIComposeTone{
		ID:            randomAIComposeID(),
		AccessHash:    randomAIComposeID(),
		OwnerUserID:   owner.ID,
		Slug:          "ai-pg-" + suffix,
		Title:         "Sharp",
		Prompt:        "Make it direct and crisp.",
		DisplayAuthor: true,
		CreatedAt:     1700000000,
		UpdatedAt:     1700000000,
	}
	if err := store.CreateAIComposeTone(ctx, tone); err != nil {
		t.Fatalf("create tone: %v", err)
	}
	if got, ok, err := store.GetAIComposeToneByID(ctx, tone.ID, tone.AccessHash); err != nil || !ok || got.Slug != tone.Slug || got.AuthorID != owner.ID {
		t.Fatalf("get by id = ok %v tone %#v err %v", ok, got, err)
	}
	if err := store.SaveAIComposeTone(ctx, other.ID, tone.ID); err != nil {
		t.Fatalf("save tone: %v", err)
	}
	list, err := store.ListAIComposeTonesForUser(ctx, other.ID)
	if err != nil || len(list) != 1 {
		t.Fatalf("list saved = %d err %v, want 1", len(list), err)
	}
	if list[0].ID != tone.ID || !list[0].Saved || list[0].Creator {
		t.Fatalf("saved view = %#v, want saved non-creator", list[0])
	}
	if got, ok, err := store.GetAIComposeToneBySlug(ctx, tone.Slug); err != nil || !ok || got.InstallsCount != 1 {
		t.Fatalf("get by slug installs = ok %v tone %#v err %v, want installs=1", ok, got, err)
	}
	if count, err := store.SavedAIComposeToneCount(ctx, other.ID); err != nil || count != 1 {
		t.Fatalf("saved count = %d err %v, want 1", count, err)
	}
	if err := store.DeleteAIComposeTone(ctx, owner.ID, tone.ID); err != nil {
		t.Fatalf("delete tone: %v", err)
	}
	if _, ok, err := store.GetAIComposeToneBySlug(ctx, tone.Slug); err != nil || ok {
		t.Fatalf("get after delete = ok %v err %v, want missing", ok, err)
	}
	if list, err := store.ListAIComposeTonesForUser(ctx, other.ID); err != nil || len(list) != 0 {
		t.Fatalf("list after delete = %d err %v, want empty", len(list), err)
	}
}

func randomAIComposeID() int64 {
	for {
		var b [8]byte
		_, _ = rand.Read(b[:])
		v := int64(binary.BigEndian.Uint64(b[:]) & 0x7fffffffffffffff)
		if v != 0 {
			return v
		}
	}
}