package router

import (
	"bytes"
	"log"
	"net/http/httptest"
	"strings"
	"testing"

	"affiliate_dash/internal/handler"
	"affiliate_dash/internal/model"
	"affiliate_dash/internal/pkg/applog"
	"affiliate_dash/internal/pkg/jwt"
	"affiliate_dash/internal/pkg/openlog"
	"affiliate_dash/internal/service"
	"affiliate_dash/internal/testdb"

	"github.com/gin-gonic/gin"
)

// newTestRouter 构建一个接好全部依赖的测试路由。
func newTestRouter(t *testing.T) (*gin.Engine, *jwt.Manager) {
	t.Helper()
	gin.SetMode(gin.TestMode)
	db := testdb.New(t)
	codec, err := service.NewSecretCodec("test-master-key")
	if err != nil {
		t.Fatalf("codec: %v", err)
	}
	jm := jwt.NewManager("test-jwt")
	tenantSvc := service.NewTenantService(db)
	authSvc := service.NewAuthService(db, jm, tenantSvc)
	userSvc := service.NewUserService(db, tenantSvc)
	callbackSvc := service.NewCallbackService(db, codec)
	fulfillmentSvc := service.NewFulfillmentService(db, callbackSvc)
	merchantSvc := service.NewMerchantService(db, codec, tenantSvc)
	rechargeSvc := service.NewRechargeService(db, fulfillmentSvc, "")
	deliverySvc := service.NewDeliveryService(fulfillmentSvc, "", "", "", "", 0)

	engine := Setup(&Handlers{
		Auth:          handler.NewAuthHandler(authSvc),
		Dashboard:     handler.NewDashboardHandler(fulfillmentSvc),
		User:          handler.NewUserHandler(userSvc),
		Open:          handler.NewOpenV1Handler(merchantSvc, fulfillmentSvc, deliverySvc),
		SourceOpen:    handler.NewOpenHandler(fulfillmentSvc),
		Merchant:      handler.NewMerchantHandler(merchantSvc, fulfillmentSvc, callbackSvc, deliverySvc, rechargeSvc),
		Recharge:      handler.NewRechargeHandler(rechargeSvc),
		JWT:           jm,
		Tenant:        tenantSvc,
		OpenDB:        db,
		SecretCodec:   codec,
		OpenAPIKey:    "source-key",
		OpenAPISecret: "source-secret",
		OpenSignSkew:  300,
	})
	return engine, jm
}

func TestSetupDoesNotPanic(t *testing.T) {
	defer func() {
		if recovered := recover(); recovered != nil {
			t.Fatalf("setup should not panic: %v", recovered)
		}
	}()
	_, _ = newTestRouter(t)
}

// TestPlatformRoutesIgnoreStaleMerchantContext 卡住一个会把整个管理端锁死的场景：
// 平台路由一旦挂上 Tenant，管理员 localStorage 里残留一个已不存在/已禁用的商户 ID 时，
// 所有 /api/platform/* 请求都会被 403，连"去改回来"的页面都打不开。
// 因此平台分组只挂 Auth + RequireRole，不解析商户上下文。
func TestPlatformRoutesIgnoreStaleMerchantContext(t *testing.T) {
	engine, jm := newTestRouter(t)
	token, err := jm.Generate(1, "admin", model.RoleAdmin)
	if err != nil {
		t.Fatalf("generate token: %v", err)
	}

	cases := []struct {
		name           string
		merchantHeader string
	}{
		{name: "无商户上下文", merchantHeader: ""},
		{name: "残留不存在的商户", merchantHeader: "999999"},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			req := httptest.NewRequest("GET", "/api/platform/merchants", nil)
			req.Header.Set("Authorization", "Bearer "+token)
			if tc.merchantHeader != "" {
				req.Header.Set("X-Merchant-ID", tc.merchantHeader)
			}
			w := httptest.NewRecorder()
			engine.ServeHTTP(w, req)

			if w.Code != 200 {
				t.Fatalf("平台路由必须不受残留商户上下文影响，期望 200，实际 %d：%s", w.Code, w.Body.String())
			}
		})
	}
}

// TestMerchantRoutesStillRejectStaleContext 反向卡住商户侧：
// 摘掉 Tenant 只针对平台分组，商户后台仍必须校验商户上下文。
func TestMerchantRoutesStillRejectStaleContext(t *testing.T) {
	engine, jm := newTestRouter(t)
	token, err := jm.Generate(1, "admin", model.RoleAdmin)
	if err != nil {
		t.Fatalf("generate token: %v", err)
	}

	req := httptest.NewRequest("GET", "/api/merchant", nil)
	req.Header.Set("Authorization", "Bearer "+token)
	req.Header.Set("X-Merchant-ID", "999999")
	w := httptest.NewRecorder()
	engine.ServeHTTP(w, req)

	if w.Code != 403 {
		t.Fatalf("商户路由必须拒绝无效商户上下文，期望 403，实际 %d：%s", w.Code, w.Body.String())
	}
}

func TestIsPollingEndpoint(t *testing.T) {
	tests := []struct {
		method   string
		path     string
		expected bool
	}{
		{"GET", "/health", true},
		{"GET", "/api/delivery/v1/orders/FO123/bind-result", true},
		{"GET", "/api/delivery/v1/orders/FO123", true},
		{"GET", "/api/client/v1/orders/FO123", true},
		{"GET", "/api/client/v1/wallet", true},
		{"GET", "/api/open/v1/orders/FO123", true},
		{"POST", "/api/client/v1/orders", false},
		{"POST", "/api/delivery/v1/orders/FO123/submit", false},
		{"POST", "/api/client/v1/orders/FO123/cancel", false},
		{"GET", "/api/dashboard", false},
	}

	for _, tc := range tests {
		got := isPollingEndpoint(tc.method, tc.path)
		if got != tc.expected {
			t.Errorf("isPollingEndpoint(%s, %s) = %v, expected %v", tc.method, tc.path, got, tc.expected)
		}
	}
}

func TestRequestLoggerGeneratesAndPassesReqID(t *testing.T) {
	gin.SetMode(gin.TestMode)
	r := gin.New()
	r.Use(requestLogger())
	r.GET("/test", func(c *gin.Context) {
		reqID := openlog.GetReqID(c)
		if reqID == "" || reqID == "-" {
			t.Errorf("expected req_id in context, got empty")
		}
		c.String(200, "ok")
	})

	req := httptest.NewRequest("GET", "/test", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	respReqID := w.Header().Get("X-Request-ID")
	if respReqID == "" {
		t.Errorf("expected X-Request-ID in response header")
	}
}

func TestRequestLoggerSuppressesPollingOnInfo(t *testing.T) {
	gin.SetMode(gin.TestMode)
	var buf bytes.Buffer
	log.SetOutput(&buf)
	defer log.SetOutput(log.Writer())

	applog.SetLevel("info")

	r := gin.New()
	r.Use(requestLogger())
	r.GET("/health", func(c *gin.Context) {
		c.String(200, "ok")
	})
	r.GET("/api/client/v1/orders/:id", func(c *gin.Context) {
		c.String(200, "ok")
	})

	// 1. In INFO level, polling requests with 200 should be silenced
	buf.Reset()
	req := httptest.NewRequest("GET", "/health", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	if buf.Len() > 0 {
		t.Errorf("expected /health 200 to be silenced in INFO mode, got: %s", buf.String())
	}

	buf.Reset()
	req = httptest.NewRequest("GET", "/api/client/v1/orders/FO12345", nil)
	w = httptest.NewRecorder()
	r.ServeHTTP(w, req)
	if buf.Len() > 0 {
		t.Errorf("expected GET order 200 to be silenced in INFO mode, got: %s", buf.String())
	}

	// 2. In DEBUG level, polling requests should appear as [DEBUG]
	applog.SetLevel("debug")
	buf.Reset()
	req = httptest.NewRequest("GET", "/api/client/v1/orders/FO12345", nil)
	w = httptest.NewRecorder()
	r.ServeHTTP(w, req)
	if !strings.Contains(buf.String(), "[DEBUG] [HTTP] 200 GET /api/client/v1/orders/FO12345") {
		t.Errorf("expected GET order to appear as [DEBUG] in DEBUG mode, got: %s", buf.String())
	}
}