package http
package engine

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

	"git.kingecg.top/kingecg/gomog/pkg/types"
)

// TestHTTPUpdateWithUpsert 测试 HTTP API 的 upsert 功能
func TestHTTPUpdateWithUpsert(t *testing.T) {
	store := NewMemoryStore(nil)
	crud := &CRUDHandler{store: store}
	agg := &AggregationEngine{store: store}

	handler := NewRequestHandler(store, crud, agg)

	// Create test collection
	collection := "test.http_upsert"
	store.collections[collection] = &Collection{
		name:      collection,
		documents: make(map[string]types.Document),
	}

	// Test upsert request
	updateReq := types.UpdateRequest{
		Updates: []types.UpdateOperation{
			{
				Q:      types.Filter{"_id": "new_user"},
				U: types.Update{
					Set: map[string]interface{}{
						"name":   "New User",
						"status": "active",
					},
					SetOnInsert: map[string]interface{}{
						"createdAt": "2024-01-01T00:00:00Z",
					},
				},
				Upsert: true,
			},
		},
	}

	body, _ := json.Marshal(updateReq)
	req := httptest.NewRequest(http.MethodPost, "/api/v1/test/http_upsert/update", bytes.NewReader(body))
	w := httptest.NewRecorder()

	handler.HandleUpdate(w, req, "test", "http_upsert")

	if w.Code != http.StatusOK {
		t.Errorf("HandleUpdate() status = %d, want %d", w.Code, http.StatusOK)
	}

	var response types.UpdateResult
	if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
		t.Fatalf("Failed to parse response: %v", err)
	}

	if response.N != 1 {
		t.Errorf("Expected 1 document affected, got %d", response.N)
	}
}

// TestHTTPUpdateWithArrayFilters 测试 HTTP API 的 arrayFilters 功能
func TestHTTPUpdateWithArrayFilters(t *testing.T) {
	store := NewMemoryStore(nil)
	crud := &CRUDHandler{store: store}
	agg := &AggregationEngine{store: store}

	handler := NewRequestHandler(store, crud, agg)

	collection := "test.http_array_filters"
	store.collections[collection] = &Collection{
		name: collection,
		documents: map[string]types.Document{
			"doc1": {
				ID: "doc1",
				Data: map[string]interface{}{
					"name": "Product",
					"grades": []interface{}{
						map[string]interface{}{"subject": "math", "score": float64(95)},
						map[string]interface{}{"subject": "english", "score": float64(75)},
					},
				},
			},
		},
	}

	updateReq := types.UpdateRequest{
		Updates: []types.UpdateOperation{
			{
				Q: types.Filter{"name": "Product"},
				U: types.Update{
					Set: map[string]interface{}{
						"grades.$[elem].passed": true,
					},
				},
				ArrayFilters: []types.Filter{
					{
						"identifier": "elem",
						"score":      map[string]interface{}{"$gte": float64(90)},
					},
				},
			},
		},
	}

	body, _ := json.Marshal(updateReq)
	req := httptest.NewRequest(http.MethodPost, "/api/v1/test/http_array_filters/update", bytes.NewReader(body))
	w := httptest.NewRecorder()

	handler.HandleUpdate(w, req, "test", "http_array_filters")

	if w.Code != http.StatusOK {
		t.Errorf("HandleUpdate() status = %d, want %d", w.Code, http.StatusOK)
	}

	// Verify the update was applied
	doc := store.collections[collection].documents["doc1"]
	grades, _ := doc.Data["grades"].([]interface{})

	foundPassed := false
	for _, grade := range grades {
		g, _ := grade.(map[string]interface{})
		if subject, ok := g["subject"].(string); ok && subject == "math" {
			if passed, ok := g["passed"].(bool); ok && passed {
				foundPassed = true
				break
			}
		}
	}

	if !foundPassed {
		t.Error("Expected math grade to have passed=true")
	}
}

// TestHTTPFindWithProjection 测试 HTTP API 的投影功能
func TestHTTPFindWithProjection(t *testing.T) {
	store := NewMemoryStore(nil)
	crud := &CRUDHandler{store: store}
	agg := &AggregationEngine{store: store}

	handler := NewRequestHandler(store, crud, agg)

	collection := "test.http_projection"
	store.collections[collection] = &Collection{
		name: collection,
		documents: map[string]types.Document{
			"doc1": {
				ID: "doc1",
				Data: map[string]interface{}{
					"name":  "Alice",
					"age":   25,
					"email": "alice@example.com",
				},
			},
		},
	}

	findReq := types.FindRequest{
		Filter: types.Filter{},
		Projection: types.Projection{
			"name":  1,
			"age":   1,
			"_id":   0,
		},
	}

	body, _ := json.Marshal(findReq)
	req := httptest.NewRequest(http.MethodPost, "/api/v1/test/http_projection/find", bytes.NewReader(body))
	w := httptest.NewRecorder()

	handler.HandleFind(w, req, "test", "http_projection")

	if w.Code != http.StatusOK {
		t.Errorf("HandleFind() status = %d, want %d", w.Code, http.StatusOK)
	}

	var response types.Response
	if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
		t.Fatalf("Failed to parse response: %v", err)
	}

	if len(response.Cursor.FirstBatch) != 1 {
		t.Errorf("Expected 1 document, got %d", len(response.Cursor.FirstBatch))
	}

	// Check that only name and age are included (email should be excluded)
	doc := response.Cursor.FirstBatch[0].Data
	if _, exists := doc["name"]; !exists {
		t.Error("Expected 'name' field in projection")
	}
	if _, exists := doc["age"]; !exists {
		t.Error("Expected 'age' field in projection")
	}
	if _, exists := doc["email"]; exists {
		t.Error("Did not expect 'email' field in projection")
	}
}

// TestHTTPAggregateWithSwitch 测试 HTTP API 的 $switch 聚合
func TestHTTPAggregateWithSwitch(t *testing.T) {
	store := NewMemoryStore(nil)
	crud := &CRUDHandler{store: store}
	agg := &AggregationEngine{store: store}

	handler := NewRequestHandler(store, crud, agg)

	collection := "test.http_switch"
	store.collections[collection] = &Collection{
		name: collection,
		documents: map[string]types.Document{
			"doc1": {ID: "doc1", Data: map[string]interface{}{"score": float64(95)}},
			"doc2": {ID: "doc2", Data: map[string]interface{}{"score": float64(85)}},
			"doc3": {ID: "doc3", Data: map[string]interface{}{"score": float64(70)}},
		},
	}

	aggregateReq := types.AggregateRequest{
		Pipeline: []types.AggregateStage{
			{
				Stage: "$project",
				Spec: map[string]interface{}{
					"grade": map[string]interface{}{
						"$switch": map[string]interface{}{
							"branches": []interface{}{
								map[string]interface{}{
									"case": map[string]interface{}{
										"$gte": []interface{}{"$score", float64(90)},
									},
									"then": "A",
								},
								map[string]interface{}{
									"case": map[string]interface{}{
										"$gte": []interface{}{"$score", float64(80)},
									},
									"then": "B",
								},
							},
							"default": "C",
						},
					},
				},
			},
		},
	}

	body, _ := json.Marshal(aggregateReq)
	req := httptest.NewRequest(http.MethodPost, "/api/v1/test/http_switch/aggregate", bytes.NewReader(body))
	w := httptest.NewRecorder()

	handler.HandleAggregate(w, req, "test", "http_switch")

	if w.Code != http.StatusOK {
		t.Errorf("HandleAggregate() status = %d, want %d", w.Code, http.StatusOK)
	}

	var response types.AggregateResult
	if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
		t.Fatalf("Failed to parse response: %v", err)
	}

	if len(response.Result) != 3 {
		t.Errorf("Expected 3 results, got %d", len(response.Result))
	}

	// Verify grades are assigned correctly
	gradeCount := map[string]int{"A": 0, "B": 0, "C": 0}
	for _, doc := range response.Result {
		if grade, ok := doc.Data["grade"].(string); ok {
			gradeCount[grade]++
		}
	}

	if gradeCount["A"] != 1 || gradeCount["B"] != 1 || gradeCount["C"] != 1 {
		t.Errorf("Grade distribution incorrect: %v", gradeCount)
	}
}

// TestHTTPHealthCheck 测试健康检查端点
func TestHTTPHealthCheck(t *testing.T) {
	store := NewMemoryStore(nil)
	crud := &CRUDHandler{store: store}
	agg := &AggregationEngine{store: store}

	server := NewHTTPServer(":0", NewRequestHandler(store, crud, agg))

	req := httptest.NewRequest(http.MethodGet, "/health", nil)
	w := httptest.NewRecorder()

	server.mux.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("Health check status = %d, want %d", w.Code, http.StatusOK)
	}

	var response map[string]interface{}
	if err := json.Unmarshal(w.Body.Bytes(), &response); err != nil {
		t.Fatalf("Failed to parse response: %v", err)
	}

	if response["status"] != "healthy" {
		t.Errorf("Expected healthy status, got %v", response["status"])
	}
}