package admin

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

	"github.com/Wei-Shaw/sub2api/internal/service"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/require"
)

func setupAdminRouter() (*gin.Engine, *stubAdminService) {
	gin.SetMode(gin.TestMode)
	router := gin.New()
	adminSvc := newStubAdminService()

	userHandler := NewUserHandler(adminSvc, nil)
	groupHandler := NewGroupHandler(adminSvc, nil, nil)
	proxyHandler := NewProxyHandler(adminSvc)
	redeemHandler := NewRedeemHandler(adminSvc, nil)

	router.GET("/api/v1/admin/users", userHandler.List)
	router.GET("/api/v1/admin/users/:id", userHandler.GetByID)
	router.POST("/api/v1/admin/users", userHandler.Create)
	router.PUT("/api/v1/admin/users/:id", userHandler.Update)
	router.DELETE("/api/v1/admin/users/:id", userHandler.Delete)
	router.POST("/api/v1/admin/users/:id/balance", userHandler.UpdateBalance)
	router.GET("/api/v1/admin/users/:id/api-keys", userHandler.GetUserAPIKeys)

	router.GET("/api/v1/admin/groups", groupHandler.List)
	router.GET("/api/v1/admin/groups/all", groupHandler.GetAll)
	router.GET("/api/v1/admin/groups/:id", groupHandler.GetByID)
	router.POST("/api/v1/admin/groups", groupHandler.Create)
	router.PUT("/api/v1/admin/groups/:id", groupHandler.Update)
	router.DELETE("/api/v1/admin/groups/:id", groupHandler.Delete)
	router.GET("/api/v1/admin/groups/:id/api-keys", groupHandler.GetGroupAPIKeys)

	router.GET("/api/v1/admin/proxies", proxyHandler.List)
	router.GET("/api/v1/admin/proxies/all", proxyHandler.GetAll)
	router.GET("/api/v1/admin/proxies/:id", proxyHandler.GetByID)
	router.POST("/api/v1/admin/proxies", proxyHandler.Create)
	router.PUT("/api/v1/admin/proxies/:id", proxyHandler.Update)
	router.DELETE("/api/v1/admin/proxies/:id", proxyHandler.Delete)
	router.POST("/api/v1/admin/proxies/batch-delete", proxyHandler.BatchDelete)
	router.POST("/api/v1/admin/proxies/:id/test", proxyHandler.Test)
	router.POST("/api/v1/admin/proxies/:id/quality-check", proxyHandler.CheckQuality)
	router.GET("/api/v1/admin/proxies/:id/accounts", proxyHandler.GetProxyAccounts)

	router.GET("/api/v1/admin/redeem-codes", redeemHandler.List)
	router.GET("/api/v1/admin/redeem-codes/:id", redeemHandler.GetByID)
	router.POST("/api/v1/admin/redeem-codes", redeemHandler.Generate)
	router.DELETE("/api/v1/admin/redeem-codes/:id", redeemHandler.Delete)
	router.POST("/api/v1/admin/redeem-codes/batch-delete", redeemHandler.BatchDelete)
	router.POST("/api/v1/admin/redeem-codes/:id/expire", redeemHandler.Expire)

	return router, adminSvc
}

func TestUserHandlerEndpoints(t *testing.T) {
	router, _ := setupAdminRouter()

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/users?page=1&page_size=20", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/users/1", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	createBody := map[string]any{"email": "new@example.com", "password": "password123", "balance": 1, "concurrency": 2}
	body, _ := json.Marshal(createBody)
	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/users", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	updateBody := map[string]any{"email": "updated@example.com"}
	body, _ = json.Marshal(updateBody)
	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPut, "/api/v1/admin/users/1", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodDelete, "/api/v1/admin/users/1", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/users/1/balance", bytes.NewBufferString(`{"balance":1,"operation":"add"}`))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/users/1/api-keys", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

}

func TestGroupHandlerEndpoints(t *testing.T) {
	router, _ := setupAdminRouter()

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/groups", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/groups/all", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/groups/2", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	body, _ := json.Marshal(map[string]any{"name": "new", "platform": "anthropic", "subscription_type": "standard"})
	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/groups", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	body, _ = json.Marshal(map[string]any{"name": "update"})
	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPut, "/api/v1/admin/groups/2", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodDelete, "/api/v1/admin/groups/2", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/groups/2/stats", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusNotFound, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/groups/2/api-keys", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)
}

func TestProxyHandlerEndpoints(t *testing.T) {
	router, _ := setupAdminRouter()

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/proxies", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/proxies/all", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/proxies/4", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	body, _ := json.Marshal(map[string]any{"name": "proxy", "protocol": "http", "host": "localhost", "port": 8080})
	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/proxies", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	body, _ = json.Marshal(map[string]any{"name": "proxy2"})
	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPut, "/api/v1/admin/proxies/4", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodDelete, "/api/v1/admin/proxies/4", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/proxies/batch-delete", bytes.NewBufferString(`{"ids":[1,2]}`))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/proxies/4/test", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/proxies/4/quality-check", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/proxies/4/accounts", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)
}

func TestRedeemHandlerEndpoints(t *testing.T) {
	router, adminSvc := setupAdminRouter()
	adminSvc.batchDeleteRedeemResult = &service.RedeemBatchDeleteResult{
		DeletedIDs: []int64{1},
		Skipped: []service.RedeemBatchDeleteSkipped{
			{ID: 2, Reason: "db error"},
		},
	}

	rec := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/v1/admin/redeem-codes", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodGet, "/api/v1/admin/redeem-codes/5", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	body, _ := json.Marshal(map[string]any{"count": 1, "type": "balance", "value": 10})
	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/redeem-codes", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodDelete, "/api/v1/admin/redeem-codes/5", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/redeem-codes/batch-delete", bytes.NewBufferString(`{"ids":[1,2]}`))
	req.Header.Set("Content-Type", "application/json")
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)
	var resp struct {
		Code int `json:"code"`
		Data struct {
			DeletedIDs []int64 `json:"deleted_ids"`
			Skipped    []struct {
				ID     int64  `json:"id"`
				Reason string `json:"reason"`
			} `json:"skipped"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
	require.Equal(t, []int64{1}, resp.Data.DeletedIDs)
	require.Len(t, resp.Data.Skipped, 1)
	require.Equal(t, int64(2), resp.Data.Skipped[0].ID)

	rec = httptest.NewRecorder()
	req = httptest.NewRequest(http.MethodPost, "/api/v1/admin/redeem-codes/5/expire", nil)
	router.ServeHTTP(rec, req)
	require.Equal(t, http.StatusOK, rec.Code)

}

func TestDeprecatedMockAdminEndpointsNotRegistered(t *testing.T) {
	router, _ := setupAdminRouter()

	testCases := []struct {
		name string
		url  string
	}{
		{
			name: "group stats",
			url:  "/api/v1/admin/groups/2/stats",
		},
		{
			name: "user usage",
			url:  "/api/v1/admin/users/1/usage?period=today",
		},
		{
			name: "proxy stats",
			url:  "/api/v1/admin/proxies/4/stats",
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			rec := httptest.NewRecorder()
			req := httptest.NewRequest(http.MethodGet, tc.url, nil)
			router.ServeHTTP(rec, req)
			require.Equal(t, http.StatusNotFound, rec.Code)
		})
	}
}