package handler

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

	"job-cheng-xing/model"
	"job-cheng-xing/repository"
	"job-cheng-xing/service"

	"github.com/gin-gonic/gin"
)

func setupRouter() *gin.Engine {
	gin.SetMode(gin.TestMode)
	repo := repository.NewMemoryRepo()
	svc := service.NewOrderService(repo)
	handler := NewOrderHandler(svc)

	r := gin.New()
	r.POST("/orders", handler.CreateOrder)
	r.PUT("/orders/:id/accept", handler.AcceptOrder)
	r.PUT("/orders/:id/cancel", handler.CancelOrder)
	return r
}

func TestCreateOrder_Handler(t *testing.T) {
	r := setupRouter()

	body := map[string]interface{}{
		"service_time": time.Now().Add(24 * time.Hour).Format(time.RFC3339),
		"duration":     120,
		"address":      "北京朝阳区xxx路xxx号",
	}
	jsonBody, _ := json.Marshal(body)

	req, _ := http.NewRequest("POST", "/orders", bytes.NewBuffer(jsonBody))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusCreated {
		t.Errorf("expected 201, got %d: %s", w.Code, w.Body.String())
	}

	var order model.Order
	json.Unmarshal(w.Body.Bytes(), &order)
	if order.ID == "" {
		t.Error("expected non-empty ID")
	}
	if order.Status != model.StatusPending {
		t.Errorf("expected pending, got %s", order.Status)
	}
}

func TestAcceptOrder_Handler_Success(t *testing.T) {
	r := setupRouter()

	body := map[string]interface{}{
		"service_time": time.Now().Add(24 * time.Hour).Format(time.RFC3339),
		"duration":     120,
		"address":      "北京朝阳",
	}
	jsonBody, _ := json.Marshal(body)
	req, _ := http.NewRequest("POST", "/orders", bytes.NewBuffer(jsonBody))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	var order model.Order
	json.Unmarshal(w.Body.Bytes(), &order)

	acceptBody := map[string]string{"provider_id": "prov_001"}
	acceptJSON, _ := json.Marshal(acceptBody)
	req2, _ := http.NewRequest("PUT", "/orders/"+order.ID+"/accept", bytes.NewBuffer(acceptJSON))
	req2.Header.Set("Content-Type", "application/json")
	w2 := httptest.NewRecorder()
	r.ServeHTTP(w2, req2)

	if w2.Code != http.StatusOK {
		t.Errorf("expected 200, got %d: %s", w2.Code, w2.Body.String())
	}
}

func TestAcceptOrder_Handler_DoubleAccept(t *testing.T) {
	r := setupRouter()

	body := map[string]interface{}{
		"service_time": time.Now().Add(24 * time.Hour).Format(time.RFC3339),
		"duration":     120,
		"address":      "北京朝阳",
	}
	jsonBody, _ := json.Marshal(body)
	req, _ := http.NewRequest("POST", "/orders", bytes.NewBuffer(jsonBody))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	var order model.Order
	json.Unmarshal(w.Body.Bytes(), &order)

	acceptBody1 := map[string]string{"provider_id": "prov_001"}
	acceptJSON1, _ := json.Marshal(acceptBody1)
	req1, _ := http.NewRequest("PUT", "/orders/"+order.ID+"/accept", bytes.NewBuffer(acceptJSON1))
	req1.Header.Set("Content-Type", "application/json")
	w1 := httptest.NewRecorder()
	r.ServeHTTP(w1, req1)

	if w1.Code != http.StatusOK {
		t.Fatalf("first accept should succeed, got %d", w1.Code)
	}

	acceptBody2 := map[string]string{"provider_id": "prov_002"}
	acceptJSON2, _ := json.Marshal(acceptBody2)
	req2, _ := http.NewRequest("PUT", "/orders/"+order.ID+"/accept", bytes.NewBuffer(acceptJSON2))
	req2.Header.Set("Content-Type", "application/json")
	w2 := httptest.NewRecorder()
	r.ServeHTTP(w2, req2)

	if w2.Code != http.StatusConflict {
		t.Errorf("expected 409, got %d: %s", w2.Code, w2.Body.String())
	}
}

func TestCancelOrder_Handler_ThenAcceptFails(t *testing.T) {
	r := setupRouter()

	body := map[string]interface{}{
		"service_time": time.Now().Add(24 * time.Hour).Format(time.RFC3339),
		"duration":     120,
		"address":      "北京朝阳",
	}
	jsonBody, _ := json.Marshal(body)
	req, _ := http.NewRequest("POST", "/orders", bytes.NewBuffer(jsonBody))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	var order model.Order
	json.Unmarshal(w.Body.Bytes(), &order)

	req1, _ := http.NewRequest("PUT", "/orders/"+order.ID+"/cancel", bytes.NewBuffer([]byte("{}")))
	req1.Header.Set("Content-Type", "application/json")
	w1 := httptest.NewRecorder()
	r.ServeHTTP(w1, req1)
	if w1.Code != http.StatusOK {
		t.Fatalf("cancel should succeed, got %d", w1.Code)
	}

	acceptBody := map[string]string{"provider_id": "prov_001"}
	acceptJSON, _ := json.Marshal(acceptBody)
	req2, _ := http.NewRequest("PUT", "/orders/"+order.ID+"/accept", bytes.NewBuffer(acceptJSON))
	req2.Header.Set("Content-Type", "application/json")
	w2 := httptest.NewRecorder()
	r.ServeHTTP(w2, req2)

	if w2.Code != http.StatusBadRequest {
		t.Errorf("expected 400, got %d: %s", w2.Code, w2.Body.String())
	}
}

func TestCancelOrder_Handler_DoubleCancel(t *testing.T) {
	r := setupRouter()

	body := map[string]interface{}{
		"service_time": time.Now().Add(24 * time.Hour).Format(time.RFC3339),
		"duration":     120,
		"address":      "北京朝阳",
	}
	jsonBody, _ := json.Marshal(body)
	req, _ := http.NewRequest("POST", "/orders", bytes.NewBuffer(jsonBody))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)
	var order model.Order
	json.Unmarshal(w.Body.Bytes(), &order)

	req1, _ := http.NewRequest("PUT", "/orders/"+order.ID+"/cancel", bytes.NewBuffer([]byte("{}")))
	req1.Header.Set("Content-Type", "application/json")
	w1 := httptest.NewRecorder()
	r.ServeHTTP(w1, req1)

	req2, _ := http.NewRequest("PUT", "/orders/"+order.ID+"/cancel", bytes.NewBuffer([]byte("{}")))
	req2.Header.Set("Content-Type", "application/json")
	w2 := httptest.NewRecorder()
	r.ServeHTTP(w2, req2)

	if w2.Code != http.StatusBadRequest {
		t.Errorf("expected 400, got %d: %s", w2.Code, w2.Body.String())
	}
}