package handler

import (
	"net/http"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/wangjia/jiu/backend/internal/model"
	"github.com/wangjia/jiu/backend/testutil"
)

func TestLicenseHandler_Activate_Success(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH001")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	// 码池里放一张未用兑换码（30 天）
	require.NoError(t, db.Create(&model.LicenseCode{
		Code: "JIUKUTEST0001", Type: "annual", Tier: "standard",
		DurationDays: 30, MaxDevices: 3, Status: "unused",
	}).Error)

	// 请求带连字符/会被归一化为 JIUKUTEST0001
	w := makeRequest(r, "POST", "/api/v1/license/activate", token, map[string]interface{}{
		"license_key": "JIUKU-TEST-0001",
		"device_id":   "device-123",
		"device_name": "Test Machine",
		"platform":    "windows",
	})
	assert.Equal(t, http.StatusOK, w.Code)

	// 兑换后门店生成授权行 + 设备绑定
	var lic model.License
	require.NoError(t, db.Where("shop_id = ?", shop.ID).First(&lic).Error)
	var dev model.LicenseDevice
	require.NoError(t, db.Where("license_id = ? AND device_id = ?", lic.ID, "device-123").First(&dev).Error)
	assert.Equal(t, "Test Machine", dev.DeviceName)

	// 码被标记已用
	var lc model.LicenseCode
	require.NoError(t, db.Where("code = ?", "JIUKUTEST0001").First(&lc).Error)
	assert.Equal(t, "redeemed", lc.Status)
}

func TestLicenseHandler_Activate_MissingFields(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH002")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	// 缺少 device_id
	w := makeRequest(r, "POST", "/api/v1/license/activate", token, map[string]interface{}{
		"license_key": "LHACT-BBBBB-CCCCC-DDDDD",
	})
	assert.Equal(t, http.StatusBadRequest, w.Code)

	// 缺少 license_key
	w = makeRequest(r, "POST", "/api/v1/license/activate", token, map[string]interface{}{
		"device_id": "device-123",
	})
	assert.Equal(t, http.StatusBadRequest, w.Code)
}

func TestLicenseHandler_Activate_NotFound(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH003")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	w := makeRequest(r, "POST", "/api/v1/license/activate", token, map[string]interface{}{
		"license_key": "NONEX-ISTEN-TTTTT-LICCC",
		"device_id":   "device-123",
	})
	assert.Equal(t, http.StatusBadRequest, w.Code)
}

func TestLicenseHandler_Activate_DeviceLimitExceeded(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH004")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	// 既有授权：1 个设备名额已占满
	future := time.Now().Add(30 * 24 * time.Hour)
	lic := &model.License{
		ShopID: shop.ID, LicenseKey: "TRIAL-LH004", IsActive: true, MaxDevices: 1, ExpiresAt: &future,
	}
	require.NoError(t, db.Create(lic).Error)
	require.NoError(t, db.Create(&model.LicenseDevice{
		LicenseID: lic.ID, ShopID: shop.ID, DeviceID: "existing-device",
	}).Error)
	// 码不提升设备上限（max_devices=0）
	require.NoError(t, db.Create(&model.LicenseCode{
		Code: "JIUKUDEVLIMIT1", Type: "annual", Tier: "standard",
		DurationDays: 365, MaxDevices: 0, Status: "unused",
	}).Error)

	w := makeRequest(r, "POST", "/api/v1/license/activate", token, map[string]interface{}{
		"license_key": "JIUKU-DEVL-IMIT1",
		"device_id":   "different-device",
	})
	assert.Equal(t, http.StatusBadRequest, w.Code)

	// 设备超限 → 整笔回滚：码仍未使用
	var lc model.LicenseCode
	require.NoError(t, db.Where("code = ?", "JIUKUDEVLIMIT1").First(&lc).Error)
	assert.Equal(t, "unused", lc.Status)
}

func TestLicenseHandler_Activate_NoAuth(t *testing.T) {
	db := testutil.SetupTestDB()
	r := setupProtectedRouter(db)

	w := makeRequest(r, "POST", "/api/v1/license/activate", "", map[string]interface{}{
		"license_key": "XXXXX-XXXXX-XXXXX-XXXXX",
		"device_id":   "device-123",
	})
	assert.Equal(t, http.StatusUnauthorized, w.Code)
}

func TestLicenseHandler_Verify_Success(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH006")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	expiry := time.Now().Add(30 * 24 * time.Hour)
	lic := &model.License{
		ShopID: shop.ID, LicenseKey: "LHVFY-BBBBB-CCCCC-DDDDD", IsActive: true, ExpiresAt: &expiry,
	}
	require.NoError(t, db.Create(lic).Error)
	require.NoError(t, db.Create(&model.LicenseDevice{
		LicenseID: lic.ID, ShopID: shop.ID, DeviceID: "my-device",
	}).Error)

	w := makeRequest(r, "GET", "/api/v1/license/verify?device_id=my-device", token, nil)
	assert.Equal(t, http.StatusOK, w.Code)
}

func TestLicenseHandler_Verify_MissingDeviceID(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH007")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	w := makeRequest(r, "GET", "/api/v1/license/verify", token, nil)
	assert.Equal(t, http.StatusBadRequest, w.Code)
}

func TestLicenseHandler_Verify_NotFound(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH008")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	w := makeRequest(r, "GET", "/api/v1/license/verify?device_id=nonexistent-device", token, nil)
	assert.Equal(t, http.StatusForbidden, w.Code)
}

func TestLicenseHandler_Verify_Expired(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH009")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	expiry := time.Now().Add(-1 * time.Hour)
	lic := &model.License{
		ShopID: shop.ID, LicenseKey: "LHVEX-BBBBB-CCCCC-DDDDD", IsActive: true, ExpiresAt: &expiry,
	}
	require.NoError(t, db.Create(lic).Error)
	require.NoError(t, db.Create(&model.LicenseDevice{
		LicenseID: lic.ID, ShopID: shop.ID, DeviceID: "expired-device",
	}).Error)

	w := makeRequest(r, "GET", "/api/v1/license/verify?device_id=expired-device", token, nil)
	assert.Equal(t, http.StatusForbidden, w.Code)
}

func TestLicenseHandler_Verify_NoAuth(t *testing.T) {
	db := testutil.SetupTestDB()
	r := setupProtectedRouter(db)

	w := makeRequest(r, "GET", "/api/v1/license/verify?device_id=any", "", nil)
	assert.Equal(t, http.StatusUnauthorized, w.Code)
}

func TestLicenseHandler_Deactivate_Success(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH010")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	expiry := time.Now().Add(30 * 24 * time.Hour)
	lic := &model.License{
		ShopID: shop.ID, LicenseKey: "LHDAC-BBBBB-CCCCC-DDDDD", IsActive: true, ExpiresAt: &expiry,
	}
	require.NoError(t, db.Create(lic).Error)
	require.NoError(t, db.Create(&model.LicenseDevice{
		LicenseID: lic.ID, ShopID: shop.ID, DeviceID: "deactivate-device",
	}).Error)

	w := makeRequest(r, "POST", "/api/v1/license/deactivate", token, map[string]interface{}{
		"device_id": "deactivate-device",
	})
	assert.Equal(t, http.StatusOK, w.Code)

	// Verify device was removed
	var count int64
	db.Model(&model.LicenseDevice{}).Where("shop_id = ? AND device_id = ?", shop.ID, "deactivate-device").Count(&count)
	assert.Equal(t, int64(0), count)
}

func TestLicenseHandler_Deactivate_MissingDeviceID(t *testing.T) {
	db := testutil.SetupTestDB()
	shop := testutil.CreateTestShop(db, "LH011")
	user := testutil.CreateTestUser(db, shop.ID, "admin", "pass", "admin")
	token := getAuthToken(user.ID, shop.ID, "admin")
	r := setupProtectedRouter(db)

	w := makeRequest(r, "POST", "/api/v1/license/deactivate", token, map[string]interface{}{})
	assert.Equal(t, http.StatusBadRequest, w.Code)
}

func TestLicenseHandler_Deactivate_NoAuth(t *testing.T) {
	db := testutil.SetupTestDB()
	r := setupProtectedRouter(db)

	w := makeRequest(r, "POST", "/api/v1/license/deactivate", "", map[string]interface{}{
		"device_id": "any-device",
	})
	assert.Equal(t, http.StatusUnauthorized, w.Code)
}