package controller

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"dubbo.apache.org/dubbo-go/v3/client"
	"github.com/gin-gonic/gin"
	pbAsset "github.com/topfans/backend/pkg/proto/asset"
	pbCommon "github.com/topfans/backend/pkg/proto/common"
)

// ============================================================
// fakeStarbookClient — 实现 pbAsset.AssetService
// 只 stub 关注的 GetMyAssets / GetAssetsByType 两个方法,
// 其余方法通过嵌入 nil 接口在调用时触发 panic(测试不会触发)
// ============================================================
type fakeStarbookClient struct {
	pbAsset.AssetService // 嵌入 nil 接口

	// GetMyAssets 配置
	homeResp    *pbAsset.GetMyAssetsResponse
	homeErr     error
	lastHomeReq *pbAsset.GetMyAssetsRequest
	homeCallCnt int

	// GetAssetsByType 配置
	itemsResp    *pbAsset.GetAssetsByTypeResponse
	itemsErr     error
	lastItemsReq *pbAsset.GetAssetsByTypeRequest
	itemsCallCnt int
}

func newFakeStarbookClient() *fakeStarbookClient {
	return &fakeStarbookClient{}
}

func (f *fakeStarbookClient) GetMyAssets(ctx context.Context, req *pbAsset.GetMyAssetsRequest, opts ...client.CallOption) (*pbAsset.GetMyAssetsResponse, error) {
	f.homeCallCnt++
	f.lastHomeReq = req
	if f.homeErr != nil {
		return nil, f.homeErr
	}
	return f.homeResp, nil
}

func (f *fakeStarbookClient) GetAssetsByType(ctx context.Context, req *pbAsset.GetAssetsByTypeRequest, opts ...client.CallOption) (*pbAsset.GetAssetsByTypeResponse, error) {
	f.itemsCallCnt++
	f.lastItemsReq = req
	if f.itemsErr != nil {
		return nil, f.itemsErr
	}
	return f.itemsResp, nil
}

// newAuthedStarbookContext 构造带 user_id + star_id 的 gin.Context(模拟 JWT 中间件已写入)
func newAuthedStarbookContext(userID, starID int64, query string) (*gin.Context, *httptest.ResponseRecorder) {
	rec := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(rec)
	c.Set("user_id", userID)
	c.Set("star_id", starID)
	c.Request = httptest.NewRequest(http.MethodGet, "/api/v1/starbook/home"+query, nil)
	return c, rec
}

// ============================================================
// TestStarbookHome_Success
// mock client,GET /starbook/home
// 期望:HTTP 200 + JSON 含 data.groups(老 starbook controller 的 HomeItems 即 AssetGroup 列表)
// 期望:fake 收到 GetMyAssetsRequest(空参数 = 全部藏品)
// ============================================================
func TestStarbookHome_Success(t *testing.T) {
	fake := newFakeStarbookClient()
	fake.homeResp = &pbAsset.GetMyAssetsResponse{
		Base: &pbCommon.BaseResponse{Code: 0, Message: "ok"},
		Data: &pbAsset.AssetListData{
			Groups: []*pbAsset.AssetGroup{
				{Type: "regular", Category: "castlove", CategoryName: "普通藏品", TotalCount: 3},
				{Type: "collection", Category: "love_card", CategoryName: "套装", TotalCount: 1},
			},
			Total:    4,
			Page:     1,
			PageSize: 20,
			HasMore:  false,
		},
	}
	ctrl := &StarbookController{assetClient: fake}

	c, rec := newAuthedStarbookContext(42, 7, "")
	ctrl.GetStarbookHome(c)

	if rec.Code != http.StatusOK {
		t.Fatalf("expected HTTP 200, got %d, body=%s", rec.Code, rec.Body.String())
	}
	var body struct {
		Code    uint32      `json:"code"`
		Message string      `json:"message"`
		Data    interface{} `json:"data"`
	}
	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
		t.Fatalf("invalid JSON: %v, body=%s", err, rec.Body.String())
	}
	if body.Code != 0 {
		t.Errorf("expected code=0, got %d (msg=%s)", body.Code, body.Message)
	}
	dataMap, ok := body.Data.(map[string]interface{})
	if !ok {
		t.Fatalf("expected data to be object, got %T", body.Data)
	}
	// 嵌套结构:Response.Data → proto resp.Data(AssetListData) → groups
	// JSON 形如 {"code":0,"message":"ok","data":{"base":{...},"data":{"groups":[...],"total":4,...}}}
	innerData, ok := dataMap["data"].(map[string]interface{})
	if !ok {
		t.Fatalf("expected inner data.data to be object, got %T", dataMap["data"])
	}
	// groups 即老 starbook controller 的 HomeItems(同 JSON 字段名)
	groups, ok := innerData["groups"].([]interface{})
	if !ok || len(groups) != 2 {
		t.Fatalf("expected groups array len 2, got %v", innerData["groups"])
	}
	if innerData["total"].(float64) != 4 {
		t.Errorf("expected total=4, got %v", innerData["total"])
	}
	// 断言 fake 收到 GetMyAssets 调用
	if fake.homeCallCnt != 1 {
		t.Errorf("expected GetMyAssets called once, got %d", fake.homeCallCnt)
	}
}

// ============================================================
// TestStarbookHome_Unauthorized
// 没有 user_id(star_id 还在),期望 401,不调下游
// ============================================================
func TestStarbookHome_Unauthorized(t *testing.T) {
	fake := newFakeStarbookClient()
	ctrl := &StarbookController{assetClient: fake}

	rec := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(rec)
	// 故意不 set user_id
	c.Set("star_id", int64(7))
	c.Request = httptest.NewRequest(http.MethodGet, "/api/v1/starbook/home", nil)

	ctrl.GetStarbookHome(c)

	if rec.Code != http.StatusUnauthorized {
		t.Fatalf("expected HTTP 401, got %d, body=%s", rec.Code, rec.Body.String())
	}
	if fake.homeCallCnt != 0 {
		t.Errorf("expected GetMyAssets NOT called, got %d calls", fake.homeCallCnt)
	}
}

// ============================================================
// TestStarbookHome_RPCError
// fake 返回 error,期望 500,响应中含错误信息
// ============================================================
func TestStarbookHome_RPCError(t *testing.T) {
	fake := newFakeStarbookClient()
	fake.homeErr = errString("assetService unreachable")
	ctrl := &StarbookController{assetClient: fake}

	c, rec := newAuthedStarbookContext(42, 7, "")
	ctrl.GetStarbookHome(c)

	if rec.Code != http.StatusInternalServerError {
		t.Fatalf("expected HTTP 500, got %d, body=%s", rec.Code, rec.Body.String())
	}
	if fake.homeCallCnt != 1 {
		t.Errorf("expected GetMyAssets called once, got %d", fake.homeCallCnt)
	}
}

// ============================================================
// TestStarbookItems_Success
// mock client,GET /starbook/items?type=regular&category=castlove&grade=2&page=1&page_size=20
// 期望:HTTP 200 + data.groups + 断言 fake 收到的 type/category/grade/page/pageSize
// ============================================================
func TestStarbookItems_Success(t *testing.T) {
	fake := newFakeStarbookClient()
	fake.itemsResp = &pbAsset.GetAssetsByTypeResponse{
		Base: &pbCommon.BaseResponse{Code: 0, Message: "ok"},
		Data: &pbAsset.AssetListData{
			Groups: []*pbAsset.AssetGroup{
				{Type: "regular", Category: "castlove", CategoryName: "铸爱", TotalCount: 5},
			},
			Total:    5,
			Page:     1,
			PageSize: 20,
			HasMore:  false,
		},
	}
	ctrl := &StarbookController{assetClient: fake}

	c, rec := newAuthedStarbookContext(42, 7, "?type=regular&category=castlove&grade=2&page=1&page_size=20")
	ctrl.GetStarbookItems(c)

	if rec.Code != http.StatusOK {
		t.Fatalf("expected HTTP 200, got %d, body=%s", rec.Code, rec.Body.String())
	}
	var body struct {
		Code    uint32      `json:"code"`
		Message string      `json:"message"`
		Data    interface{} `json:"data"`
	}
	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
		t.Fatalf("invalid JSON: %v, body=%s", err, rec.Body.String())
	}
	if body.Code != 0 {
		t.Errorf("expected code=0, got %d (msg=%s)", body.Code, body.Message)
	}
	dataMap, ok := body.Data.(map[string]interface{})
	if !ok {
		t.Fatalf("expected data to be object, got %T", body.Data)
	}
	innerData, ok := dataMap["data"].(map[string]interface{})
	if !ok {
		t.Fatalf("expected inner data.data to be object, got %T", dataMap["data"])
	}
	groups, ok := innerData["groups"].([]interface{})
	if !ok || len(groups) != 1 {
		t.Fatalf("expected groups array len 1, got %v", innerData["groups"])
	}
	// 断言 fake 收到正确的 RPC 参数
	if fake.itemsCallCnt != 1 {
		t.Errorf("expected GetAssetsByType called once, got %d", fake.itemsCallCnt)
	}
	if fake.lastItemsReq.GetType() != "regular" {
		t.Errorf("Type mismatch: got %q", fake.lastItemsReq.GetType())
	}
	if fake.lastItemsReq.GetCategory() != "castlove" {
		t.Errorf("Category mismatch: got %q", fake.lastItemsReq.GetCategory())
	}
	if fake.lastItemsReq.GetGrade() != 2 {
		t.Errorf("Grade mismatch: got %d", fake.lastItemsReq.GetGrade())
	}
	if fake.lastItemsReq.GetPage() != 1 {
		t.Errorf("Page mismatch: got %d", fake.lastItemsReq.GetPage())
	}
	if fake.lastItemsReq.GetPageSize() != 20 {
		t.Errorf("PageSize mismatch: got %d", fake.lastItemsReq.GetPageSize())
	}
}

// ============================================================
// TestStarbookItems_MissingType
// 不带 type 参数,期望 400,不调下游
// ============================================================
func TestStarbookItems_MissingType(t *testing.T) {
	fake := newFakeStarbookClient()
	ctrl := &StarbookController{assetClient: fake}

	c, rec := newAuthedStarbookContext(42, 7, "")
	ctrl.GetStarbookItems(c)

	if rec.Code != http.StatusBadRequest {
		t.Fatalf("expected HTTP 400, got %d, body=%s", rec.Code, rec.Body.String())
	}
	if fake.itemsCallCnt != 0 {
		t.Errorf("expected GetAssetsByType NOT called, got %d calls", fake.itemsCallCnt)
	}
}

// ============================================================
// errString 简单错误包装(避免引入 errors 包造成额外依赖)
// ============================================================
type errString string

func (e errString) Error() string { return string(e) }