package provider

import (
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.uber.org/zap"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"

	"github.com/topfans/backend/pkg/authctx"
	"github.com/topfans/backend/pkg/logger"
	"github.com/topfans/backend/pkg/models"
	pb "github.com/topfans/backend/pkg/proto/asset"
)

func init() {
	// provider 里的 handler 会调用 logger.Logger.*，测试环境先初始化避免 nil panic。
	if logger.Logger == nil {
		logger.Logger = zap.NewNop()
	}
}

// ---- fakes ----

// fakeAssetLikeMgr 捕获 provider 传给 AssetLikeService 的身份参数。
type fakeAssetLikeMgr struct {
	gotUserID int64
	gotStarID int64
	called    bool
}

func (f *fakeAssetLikeMgr) CheckAssetLike(_ context.Context, _ int64, userID, starID int64) (bool, error) {
	f.called = true
	f.gotUserID = userID
	f.gotStarID = starID
	return true, nil
}
func (f *fakeAssetLikeMgr) LikeAsset(context.Context, int64, int64, int64) (int32, error) {
	return 0, nil
}
func (f *fakeAssetLikeMgr) UnlikeAsset(context.Context, int64, int64, int64) (int32, error) {
	return 0, nil
}
func (f *fakeAssetLikeMgr) GetAssetLikes(context.Context, int64, int32, int32) ([]*models.AssetLike, int64, error) {
	return nil, 0, nil
}
func (f *fakeAssetLikeMgr) ClearAssetLikeRecords(context.Context, int64) error { return nil }

// fakeAssetService 捕获分享类 RPC 落到 service 层时 req.SharerUserId 的实际值。
type fakeAssetService struct {
	qrReq    *pb.GetAssetQrcodeRequest
	trackReq *pb.TrackShareRequest
}

func (f *fakeAssetService) GetMyAssets(*pb.GetMyAssetsRequest, int64, int64) (*pb.GetMyAssetsResponse, error) {
	return nil, nil
}
func (f *fakeAssetService) GetAssetsByType(*pb.GetAssetsByTypeRequest, int64, int64) (*pb.GetAssetsByTypeResponse, error) {
	return nil, nil
}
func (f *fakeAssetService) GetAsset(*pb.GetAssetRequest, int64, int64) (*pb.GetAssetResponse, error) {
	return nil, nil
}
func (f *fakeAssetService) GetAssetStatus(*pb.GetAssetStatusRequest, int64, int64) (*pb.GetAssetStatusResponse, error) {
	return nil, nil
}
func (f *fakeAssetService) GetAssetForRPC(*pb.GetAssetForRPCRequest) (*pb.GetAssetForRPCResponse, error) {
	return nil, nil
}
func (f *fakeAssetService) GetAssetQrcode(_ context.Context, req *pb.GetAssetQrcodeRequest) (*pb.GetAssetQrcodeResponse, error) {
	f.qrReq = req
	// OSS key 在 ShareService 里由 req.SharerUserId 拼出（share/qrcode/<asset>_<sharer>_<sys>.png），
	// 这里回填一个体现覆盖后 sharer 的 URL，供测试断言归因值随 req 流转。
	return &pb.GetAssetQrcodeResponse{QrcodeUrl: "https://cdn/share/qrcode/x.png"}, nil
}
func (f *fakeAssetService) TrackShare(_ context.Context, req *pb.TrackShareRequest) (*pb.TrackShareResponse, error) {
	f.trackReq = req
	return &pb.TrackShareResponse{ShareEventId: 1}, nil
}

// ---- CheckAssetLike ----

func TestCheckAssetLike_RejectsForgedUserId(t *testing.T) {
	likeMgr := &fakeAssetLikeMgr{}
	p := &AssetProvider{assetLikeService: likeMgr}

	// ctx 携带可信身份 (100, 200)；req 里伪造 (999, 888)。
	ctx := authctx.WithIdentity(context.Background(), 100, 200)
	req := &pb.CheckAssetLikeRequest{AssetId: 7, UserId: 999, StarId: 888}

	_, err := p.CheckAssetLike(ctx, req)
	require.NoError(t, err)

	assert.True(t, likeMgr.called, "service 应被调用")
	assert.Equal(t, int64(100), likeMgr.gotUserID, "必须用 ctx 可信 user_id 覆盖伪造值")
	assert.Equal(t, int64(200), likeMgr.gotStarID, "必须用 ctx 可信 star_id 覆盖伪造值")
}

func TestCheckAssetLike_NoIdentity(t *testing.T) {
	likeMgr := &fakeAssetLikeMgr{}
	p := &AssetProvider{assetLikeService: likeMgr}

	req := &pb.CheckAssetLikeRequest{AssetId: 7, UserId: 999, StarId: 888}
	resp, err := p.CheckAssetLike(context.Background(), req)

	require.Error(t, err)
	assert.Equal(t, codes.Unauthenticated, status.Code(err))
	assert.False(t, likeMgr.called, "缺身份时不得触达 service")
	if resp != nil && resp.Base != nil {
		assert.Equal(t, uint32(codes.Unauthenticated), resp.Base.Code)
	}
}

// ---- GetAssetQrcode ----

func TestGetAssetQrcode_RejectsForgedSharer(t *testing.T) {
	svc := &fakeAssetService{}
	p := &AssetProvider{assetService: svc}

	ctx := authctx.WithIdentity(context.Background(), 100, 0)
	req := &pb.GetAssetQrcodeRequest{AssetId: 7, SharerUserId: 999, SystemType: "android"}

	_, err := p.GetAssetQrcode(ctx, req)
	require.NoError(t, err)

	require.NotNil(t, svc.qrReq, "service 应收到请求")
	assert.Equal(t, int64(100), svc.qrReq.SharerUserId,
		"分享归因必须锚定 ctx 可信 user_id，OSS key/落地页 from= 都由此拼出")
}

func TestGetAssetQrcode_NoIdentity(t *testing.T) {
	svc := &fakeAssetService{}
	p := &AssetProvider{assetService: svc}

	req := &pb.GetAssetQrcodeRequest{AssetId: 7, SharerUserId: 999, SystemType: "android"}
	_, err := p.GetAssetQrcode(context.Background(), req)

	require.Error(t, err)
	assert.Equal(t, codes.Unauthenticated, status.Code(err))
	assert.Nil(t, svc.qrReq, "缺身份时不得触达 service")
}

// ---- TrackShare ----

func TestTrackShare_RejectsForgedSharer(t *testing.T) {
	svc := &fakeAssetService{}
	p := &AssetProvider{assetService: svc}

	ctx := authctx.WithIdentity(context.Background(), 100, 0)
	req := &pb.TrackShareRequest{AssetId: 7, SharerUserId: 999, SystemType: "android",
		ShareTarget: "weixin_friend", Result: "success"}

	_, err := p.TrackShare(ctx, req)
	require.NoError(t, err)

	require.NotNil(t, svc.trackReq, "service 应收到请求")
	assert.Equal(t, int64(100), svc.trackReq.SharerUserId,
		"share_events.sharer_user_id 必须落 ctx 可信 user_id，不能被 req 伪造")
}

func TestTrackShare_NoIdentity(t *testing.T) {
	svc := &fakeAssetService{}
	p := &AssetProvider{assetService: svc}

	req := &pb.TrackShareRequest{AssetId: 7, SharerUserId: 999, SystemType: "android",
		ShareTarget: "weixin_friend", Result: "success"}
	_, err := p.TrackShare(context.Background(), req)

	require.Error(t, err)
	assert.Equal(t, codes.Unauthenticated, status.Code(err))
	assert.Nil(t, svc.trackReq, "缺身份时不得触达 service")
}