package httpapi

import (
	"context"
	"encoding/json"
	"errors"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"git.5iot.com/iotlcm-public/iotlcm-sms/internal/sms"
)

type fakeSender struct {
	config  sms.Config
	message sms.Message
	result  sms.Result
	err     error
}

func (f *fakeSender) Send(_ context.Context, config sms.Config, message sms.Message) (sms.Result, error) {
	f.config = config
	f.message = message
	return f.result, f.err
}

func TestSendSuccess(t *testing.T) {
	fake := &fakeSender{result: sms.Result{Code: 0, Message: "发送成功"}}
	server := httptest.NewServer(NewHandler(fake))
	defer server.Close()

	body := `{"config":{"serviceType":"1","accessKeyId":"id","accessKeySecret":"secret","signName":"测试签名","templateId":"SMS_1"},"params":{"phoneNumber":"138****8000","msgContent":"{\"code\":\"123456\"}"}}`
	response, err := http.Post(server.URL+"/api/v1/sms/send", "application/json", strings.NewReader(body))
	if err != nil {
		t.Fatal(err)
	}
	defer response.Body.Close()

	if response.StatusCode != http.StatusOK {
		t.Fatalf("status = %d, want %d", response.StatusCode, http.StatusOK)
	}
	if fake.config.ServiceType != sms.ServiceAliyun || fake.message.PhoneNumber != "138****8000" {
		t.Fatalf("unexpected request: config=%+v message=%+v", fake.config, fake.message)
	}
}

func TestSendRejectsInvalidJSON(t *testing.T) {
	request := httptest.NewRequest(http.MethodPost, "/api/v1/sms/send", strings.NewReader(`{"unknown":true}`))
	recorder := httptest.NewRecorder()
	NewHandler(&fakeSender{}).ServeHTTP(recorder, request)

	if recorder.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want %d", recorder.Code, http.StatusBadRequest)
	}
}

func TestSendMapsProviderError(t *testing.T) {
	fake := &fakeSender{
		result: sms.Result{Code: 502, Message: "provider failed"},
		err:    errors.New("provider failed"),
	}
	request := httptest.NewRequest(http.MethodPost, "/api/v1/sms/send", strings.NewReader(`{"config":{},"params":{}}`))
	recorder := httptest.NewRecorder()
	NewHandler(fake).ServeHTTP(recorder, request)

	if recorder.Code != http.StatusBadGateway {
		t.Fatalf("status = %d, want %d", recorder.Code, http.StatusBadGateway)
	}
	var result sms.Result
	if err := json.NewDecoder(recorder.Body).Decode(&result); err != nil {
		t.Fatal(err)
	}
	if result.Code != 502 {
		t.Fatalf("code = %d, want 502", result.Code)
	}
}