package service

import (
	"context"
	"testing"

	"carrotskin/internal/model"
	"carrotskin/internal/repository"
	"carrotskin/pkg/utils"

	"go.uber.org/zap"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

// newFriendsTestDB 构建内存 sqlite 并迁移所需表
func newFriendsTestDB(t *testing.T) *gorm.DB {
	t.Helper()
	db, err := gorm.Open(sqlite.Open("file::memory:?cache=shared"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	if err != nil {
		t.Fatalf("open sqlite: %v", err)
	}
	if err := db.AutoMigrate(&model.Profile{}, &model.Friend{}, &model.PlayerAttributes{}); err != nil {
		t.Fatalf("migrate: %v", err)
	}
	// 清理共享内存库的残留数据
	db.Exec("DELETE FROM friends")
	db.Exec("DELETE FROM profiles")
	db.Exec("DELETE FROM player_attributes")
	return db
}

// newFriendsService 用真实 GORM repo + nil redis 构造服务（presence/blocklist 缓存路径会跳过）
func newFriendsService(t *testing.T) (FriendsService, *gorm.DB) {
	t.Helper()
	db := newFriendsTestDB(t)
	friendRepo := repository.NewFriendRepository(db)
	attrRepo := repository.NewPlayerAttributeRepository(db)
	profileRepo := repository.NewProfileRepository(db)
	return NewFriendsService(friendRepo, attrRepo, profileRepo, nil, zap.NewNop()), db
}

func mustCreateProfile(t *testing.T, db *gorm.DB, name string) *model.Profile {
	t.Helper()
	p := &model.Profile{
		UUID:          utils.GenerateUUID(),
		UserID:        1,
		Name:          name,
		RSAPrivateKey: "x",
	}
	if err := db.Create(p).Error; err != nil {
		t.Fatalf("create profile %s: %v", name, err)
	}
	return p
}

// TestAddFriend_SelfReject 添加自己应报错
func TestAddFriend_SelfReject(t *testing.T) {
	svc, db := newFriendsService(t)
	p := mustCreateProfile(t, db, "self")
	_, err := svc.PerformFriendAction(context.Background(), p.UUID, FriendActionRequest{
		ProfileID:  p.UUID,
		UpdateType: FriendActionAdd,
	})
	if err == nil {
		t.Fatal("添加自己应报错")
	}
}

// TestAddFriend_UnknownProfile 目标不存在应报错
func TestAddFriend_UnknownProfile(t *testing.T) {
	svc, db := newFriendsService(t)
	p := mustCreateProfile(t, db, "a")
	// 使用 32 位无连字符 UUID，规避 FormatUUIDToNoDash 对非法长度的告警路径
	_, err := svc.PerformFriendAction(context.Background(), p.UUID, FriendActionRequest{
		ProfileID:  "ffffffffffffffffffffffffffffffff",
		UpdateType: FriendActionAdd,
	})
	if err == nil {
		t.Fatal("不存在的目标应报错")
	}
}

// TestAddFriend_SendRequestThenAccept 双向流程：A 发请求 -> B 接受 -> 互为好友
func TestAddFriend_SendRequestThenAccept(t *testing.T) {
	svc, db := newFriendsService(t)
	a := mustCreateProfile(t, db, "alice")
	b := mustCreateProfile(t, db, "bob")

	// A 向 B 发起请求
	resp, err := svc.PerformFriendAction(context.Background(), a.UUID, FriendActionRequest{
		ProfileID:  b.UUID,
		UpdateType: FriendActionAdd,
	})
	if err != nil {
		t.Fatalf("A 发起请求失败: %v", err)
	}
	if len(resp.OutgoingRequests) != 1 || resp.OutgoingRequests[0].ProfileID != b.UUID {
		t.Fatalf("A 的 outgoing 应包含 B, got %+v", resp.OutgoingRequests)
	}

	// B 视角：incoming 应包含 A
	respB, err := svc.ListFriends(context.Background(), b.UUID)
	if err != nil {
		t.Fatalf("B 查询列表失败: %v", err)
	}
	if len(respB.IncomingRequests) != 1 || respB.IncomingRequests[0].ProfileID != a.UUID {
		t.Fatalf("B 的 incoming 应包含 A, got %+v", respB.IncomingRequests)
	}

	// B 接受请求（B 用 ADD 指向 A -> 自动接受）
	resp, err = svc.PerformFriendAction(context.Background(), b.UUID, FriendActionRequest{
		ProfileID:  a.UUID,
		UpdateType: FriendActionAdd,
	})
	if err != nil {
		t.Fatalf("B 接受请求失败: %v", err)
	}
	if len(resp.Friends) != 1 || resp.Friends[0].ProfileID != a.UUID {
		t.Fatalf("B 的 friends 应包含 A, got %+v", resp.Friends)
	}

	// A 视角：也是好友
	respA, err := svc.ListFriends(context.Background(), a.UUID)
	if err != nil {
		t.Fatalf("A 查询列表失败: %v", err)
	}
	if len(respA.Friends) != 1 || respA.Friends[0].ProfileID != b.UUID {
		t.Fatalf("A 的 friends 应包含 B, got %+v", respA.Friends)
	}
}

// TestRemoveFriend_Flow A B 互为好友后 A 删除好友 -> 双方都无好友
func TestRemoveFriend_Flow(t *testing.T) {
	svc, db := newFriendsService(t)
	a := mustCreateProfile(t, db, "alice")
	b := mustCreateProfile(t, db, "bob")

	// 互为好友
	if _, err := svc.PerformFriendAction(context.Background(), a.UUID, FriendActionRequest{ProfileID: b.UUID, UpdateType: FriendActionAdd}); err != nil {
		t.Fatal(err)
	}
	if _, err := svc.PerformFriendAction(context.Background(), b.UUID, FriendActionRequest{ProfileID: a.UUID, UpdateType: FriendActionAdd}); err != nil {
		t.Fatal(err)
	}

	// A 删除好友
	if _, err := svc.PerformFriendAction(context.Background(), a.UUID, FriendActionRequest{ProfileID: b.UUID, UpdateType: FriendActionRemove}); err != nil {
		t.Fatalf("A 删除好友失败: %v", err)
	}

	// B 视角应不再有好友
	respB, err := svc.ListFriends(context.Background(), b.UUID)
	if err != nil {
		t.Fatal(err)
	}
	if len(respB.Friends) != 0 {
		t.Fatalf("B 应无好友, got %+v", respB.Friends)
	}
}

// TestDeclineIncomingRequest B 拒绝 A 的请求 -> A 的 outgoing 清空
func TestDeclineIncomingRequest(t *testing.T) {
	svc, db := newFriendsService(t)
	a := mustCreateProfile(t, db, "alice")
	b := mustCreateProfile(t, db, "bob")

	if _, err := svc.PerformFriendAction(context.Background(), a.UUID, FriendActionRequest{ProfileID: b.UUID, UpdateType: FriendActionAdd}); err != nil {
		t.Fatal(err)
	}
	// B 拒绝（B 用 REMOVE 指向 A）
	if _, err := svc.PerformFriendAction(context.Background(), b.UUID, FriendActionRequest{ProfileID: a.UUID, UpdateType: FriendActionRemove}); err != nil {
		t.Fatalf("B 拒绝失败: %v", err)
	}
	// A 的 outgoing 应清空
	respA, err := svc.ListFriends(context.Background(), a.UUID)
	if err != nil {
		t.Fatal(err)
	}
	if len(respA.OutgoingRequests) != 0 {
		t.Fatalf("A 的 outgoing 应已清空, got %+v", respA.OutgoingRequests)
	}
}

// TestGetAttributes_Default 默认属性
func TestGetAttributes_Default(t *testing.T) {
	svc, db := newFriendsService(t)
	p := mustCreateProfile(t, db, "a")
	resp, err := svc.GetAttributes(context.Background(), p.UUID)
	if err != nil {
		t.Fatal(err)
	}
	if !resp.ProfanityFilterPreferences.ProfanityFilterOn {
		t.Error("默认应启用脏词过滤")
	}
	if resp.FriendsPreferences.Friends != "ENABLED" {
		t.Errorf("默认 friends = %q, want ENABLED", resp.FriendsPreferences.Friends)
	}
}

// TestUpdateAttributes_PartialUpdate 部分更新保留其它字段
func TestUpdateAttributes_PartialUpdate(t *testing.T) {
	svc, db := newFriendsService(t)
	p := mustCreateProfile(t, db, "a")

	off := false
	if err := svc.UpdateAttributes(context.Background(), p.UUID, PlayerAttributesRequest{
		ProfanityFilterPreferences: &ProfanityFilterPreferences{ProfanityFilterOn: &off},
	}); err != nil {
		t.Fatalf("UpdateAttributes err: %v", err)
	}
	var row model.PlayerAttributes
	if err := db.First(&row, "profile_uuid = ?", p.UUID).Error; err != nil {
		t.Fatalf("查询 row 失败: %v", err)
	}
	t.Logf("DB row: %+v", row)
	resp, err := svc.GetAttributes(context.Background(), p.UUID)
	if err != nil {
		t.Fatalf("GetAttributes err: %v", err)
	}
	if resp.ProfanityFilterPreferences.ProfanityFilterOn {
		t.Error("脏词过滤应已关闭")
	}
	if resp.FriendsPreferences.Friends != "ENABLED" {
		t.Errorf("friends 应保留 ENABLED, got %q", resp.FriendsPreferences.Friends)
	}
}

// TestBlocklist_BlockUnblock 屏蔽/取消屏蔽
func TestBlocklist_BlockUnblock(t *testing.T) {
	svc, db := newFriendsService(t)
	a := mustCreateProfile(t, db, "alice")
	b := mustCreateProfile(t, db, "bob")

	// 使用类型断言访问 Block/Unblock（接口未暴露，但实现有）
	fs := svc.(*friendsService)
	if err := fs.Block(context.Background(), a.UUID, b.UUID); err != nil {
		t.Fatalf("屏蔽失败: %v", err)
	}
	resp, err := svc.GetBlocklist(context.Background(), a.UUID)
	if err != nil {
		t.Fatal(err)
	}
	if len(resp.BlockedProfiles) != 1 || resp.BlockedProfiles[0] != b.UUID {
		t.Fatalf("屏蔽列表应含 B, got %+v", resp.BlockedProfiles)
	}
	if err := fs.Unblock(context.Background(), a.UUID, b.UUID); err != nil {
		t.Fatalf("取消屏蔽失败: %v", err)
	}
	resp, err = svc.GetBlocklist(context.Background(), a.UUID)
	if err != nil {
		t.Fatal(err)
	}
	if len(resp.BlockedProfiles) != 0 {
		t.Fatalf("屏蔽列表应空, got %+v", resp.BlockedProfiles)
	}
}