package api

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

	"github.com/alicebob/miniredis/v2"
	"github.com/ez-api/ez-api/internal/dto"
	"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 newTestHandler(t *testing.T) (*Handler, *gorm.DB) {
	t.Helper()
	gin.SetMode(gin.TestMode)

	// Use a unique in-memory DB per test to avoid cross-test interference.
	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.Master{}, &model.Key{}, &model.Provider{}, &model.Model{}, &model.Binding{}, &model.LogRecord{}); 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, sync, nil), db
}

func TestCreateProvider_DefaultsVertexLocationGlobal(t *testing.T) {
	h, _ := newTestHandler(t)

	r := gin.New()
	r.POST("/admin/providers", h.CreateProvider)

	reqBody := dto.ProviderDTO{
		Name:   "g1",
		Type:   "vertex-express",
		Group:  "default",
		Models: []string{"gemini-3-pro-preview"},
	}
	b, _ := json.Marshal(reqBody)

	req := httptest.NewRequest(http.MethodPost, "/admin/providers", bytes.NewReader(b))
	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 got model.Provider
	if err := json.Unmarshal(rr.Body.Bytes(), &got); err != nil {
		t.Fatalf("unmarshal: %v", err)
	}
	if got.GoogleLocation != "global" {
		t.Fatalf("expected google_location=global, got %q", got.GoogleLocation)
	}
}

func TestUpdateProvider_DefaultsVertexLocationGlobalWhenMissing(t *testing.T) {
	h, db := newTestHandler(t)

	existing := &model.Provider{
		Name:   "g2",
		Type:   "vertex",
		Group:  "default",
		Models: "gemini-3-pro-preview",
		Status: "active",
	}
	if err := db.Create(existing).Error; err != nil {
		t.Fatalf("create provider: %v", err)
	}

	r := gin.New()
	r.PUT("/admin/providers/:id", h.UpdateProvider)

	req := httptest.NewRequest(http.MethodPut, fmt.Sprintf("/admin/providers/%d", existing.ID), bytes.NewReader([]byte(`{}`)))
	req.Header.Set("Content-Type", "application/json")
	rr := httptest.NewRecorder()
	r.ServeHTTP(rr, req)

	if rr.Code != http.StatusOK {
		t.Fatalf("expected 200, got %d body=%s", rr.Code, rr.Body.String())
	}
	var got model.Provider
	if err := json.Unmarshal(rr.Body.Bytes(), &got); err != nil {
		t.Fatalf("unmarshal: %v", err)
	}
	if got.GoogleLocation != "global" {
		t.Fatalf("expected google_location=global, got %q", got.GoogleLocation)
	}
}