package api

import (
	"bytes"
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/alicebob/miniredis/v2"
	"github.com/ez-api/ez-api/internal/middleware"
	"github.com/ez-api/ez-api/internal/model"
	"github.com/ez-api/ez-api/internal/service"
	"github.com/gin-gonic/gin"
	"github.com/redis/go-redis/v9"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

func newTestHandlerWithNamespace(t *testing.T) (*Handler, *gorm.DB, *miniredis.Miniredis) {
	t.Helper()
	gin.SetMode(gin.TestMode)

	dsn := fmt.Sprintf("file:%s?mode=memory&cache=shared", t.Name())
	db, err := gorm.Open(sqlite.Open(dsn), &gorm.Config{})
	if err != nil {
		t.Fatalf("open sqlite: %v", err)
	}
	if err := db.AutoMigrate(&model.ProviderGroup{}, &model.APIKey{}, &model.Binding{}, &model.Namespace{}); err != nil {
		t.Fatalf("migrate: %v", err)
	}

	mr := miniredis.RunT(t)
	rdb := redis.NewClient(&redis.Options{Addr: mr.Addr()})
	sync := service.NewSyncService(rdb)
	return NewHandler(db, db, sync, nil, rdb, nil), db, mr
}

func TestNamespaceCRUD_DeleteCleansBindings(t *testing.T) {
	h, db, _ := newTestHandlerWithNamespace(t)

	group := model.ProviderGroup{Name: "g1", Type: "openai", BaseURL: "https://api.openai.com/v1", Models: "m1", Status: "active"}
	if err := db.Create(&group).Error; err != nil {
		t.Fatalf("create group: %v", err)
	}
	if err := db.Create(&model.APIKey{
		GroupID: group.ID,
		APIKey:  "k1",
		Status:  "active",
	}).Error; err != nil {
		t.Fatalf("create api key: %v", err)
	}

	if err := db.Create(&model.Binding{
		Namespace:     "ns1",
		PublicModel:   "m1",
		GroupID:       group.ID,
		Weight:        1,
		SelectorType:  "exact",
		SelectorValue: "m1",
		Status:        "active",
	}).Error; err != nil {
		t.Fatalf("create binding: %v", err)
	}

	r := gin.New()
	r.Use(middleware.ResponseEnvelope())
	r.POST("/admin/namespaces", h.CreateNamespace)
	r.DELETE("/admin/namespaces/:id", h.DeleteNamespace)

	body := []byte(`{"name":"ns1","description":"demo"}`)
	req := httptest.NewRequest(http.MethodPost, "/admin/namespaces", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	rr := httptest.NewRecorder()
	r.ServeHTTP(rr, req)

	if rr.Code != http.StatusCreated {
		t.Fatalf("expected 201, got %d body=%s", rr.Code, rr.Body.String())
	}
	var created model.Namespace
	decodeEnvelope(t, rr, &created)

	delReq := httptest.NewRequest(http.MethodDelete, fmt.Sprintf("/admin/namespaces/%d", created.ID), nil)
	delRec := httptest.NewRecorder()
	r.ServeHTTP(delRec, delReq)

	if delRec.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d body=%s", delRec.Code, delRec.Body.String())
	}

	var remaining int64
	if err := db.Model(&model.Binding{}).Where("namespace = ?", "ns1").Count(&remaining).Error; err != nil {
		t.Fatalf("count bindings: %v", err)
	}
	if remaining != 0 {
		t.Fatalf("expected bindings deleted, got %d", remaining)
	}
}