package handlers

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

	"github.com/gin-gonic/gin"

	"gitea.d3m0k1d.ru/d3m0k1d/rostpoliplast/backend/internal/storage"
)

type testRepo struct {
	baleTypes []storage.BaleType
	bales     []storage.Bale
	stages    []storage.LineStage
	readings  []storage.SensorReading
	events    []storage.ProductionEvent
	stats     *storage.LineStats
}

func (r *testRepo) GetBales(ctx context.Context) ([]storage.Bale, error) {
	return r.bales, nil
}
func (r *testRepo) GetBaleByID(ctx context.Context, id string) (*storage.Bale, error) {
	for _, b := range r.bales {
		if b.ID == 1 {
			return &b, nil
		}
	}
	return nil, nil
}
func (r *testRepo) CreateBale(ctx context.Context, input storage.Bale) (*storage.Bale, error) {
	b := storage.Bale{ID: 1, TypeID: input.TypeID, Timestamp: time.Now()}
	r.bales = append(r.bales, b)
	return &b, nil
}
func (r *testRepo) UpdateBale(ctx context.Context, id string, input storage.Bale) (*storage.Bale, error) {
	return &input, nil
}
func (r *testRepo) DeleteBale(ctx context.Context, id string) error {
	return nil
}
func (r *testRepo) GetBaleTypeByType(ctx context.Context, typeName string) (*storage.BaleType, error) {
	for _, bt := range r.baleTypes {
		if bt.Type == typeName {
			return &bt, nil
		}
	}
	return nil, nil
}

func (r *testRepo) GetBaleTypes(ctx context.Context) ([]storage.BaleType, error) {
	return r.baleTypes, nil
}
func (r *testRepo) GetBaleTypeByID(ctx context.Context, id int) (*storage.BaleType, error) {
	for _, bt := range r.baleTypes {
		if bt.ID == id {
			return &bt, nil
		}
	}
	return nil, nil
}
func (r *testRepo) CreateBaleType(ctx context.Context, input storage.BaleType) (*storage.BaleType, error) {
	bt := storage.BaleType{ID: 1, Type: input.Type, Weight: input.Weight}
	r.baleTypes = append(r.baleTypes, bt)
	return &bt, nil
}
func (r *testRepo) UpdateBaleType(ctx context.Context, id int, input storage.BaleType) (*storage.BaleType, error) {
	return &input, nil
}
func (r *testRepo) DeleteBaleType(ctx context.Context, id int) error {
	return nil
}

func (r *testRepo) GetLineStages(ctx context.Context) ([]storage.LineStage, error) {
	return r.stages, nil
}
func (r *testRepo) GetLineStageByID(ctx context.Context, id int) (*storage.LineStage, error) {
	for _, s := range r.stages {
		if s.ID == id {
			return &s, nil
		}
	}
	return nil, nil
}
func (r *testRepo) CreateLineStage(ctx context.Context, input storage.LineStage) (*storage.LineStage, error) {
	s := storage.LineStage{ID: 1, Name: input.Name, Order: input.Order}
	r.stages = append(r.stages, s)
	return &s, nil
}
func (r *testRepo) UpdateLineStage(ctx context.Context, id int, input storage.LineStage) (*storage.LineStage, error) {
	return &input, nil
}
func (r *testRepo) DeleteLineStage(ctx context.Context, id int) error {
	return nil
}

func (r *testRepo) CreateSensorReading(ctx context.Context, input storage.SensorReading) (*storage.SensorReading, error) {
	s := storage.SensorReading{ID: 1, StageID: input.StageID, Value: input.Value}
	r.readings = append(r.readings, s)
	return &s, nil
}
func (r *testRepo) GetSensorReadingsByStage(ctx context.Context, stageID int) ([]storage.SensorReading, error) {
	var result []storage.SensorReading
	for _, s := range r.readings {
		if s.StageID == stageID {
			result = append(result, s)
		}
	}
	return result, nil
}

func (r *testRepo) CreateProductionEvent(ctx context.Context, input storage.ProductionEvent) (*storage.ProductionEvent, error) {
	e := storage.ProductionEvent{ID: 1, StageID: input.StageID, EventType: input.EventType}
	r.events = append(r.events, e)
	return &e, nil
}
func (r *testRepo) GetProductionEventsByStage(ctx context.Context, stageID int) ([]storage.ProductionEvent, error) {
	var result []storage.ProductionEvent
	for _, e := range r.events {
		if e.StageID == stageID {
			result = append(result, e)
		}
	}
	return result, nil
}

func (r *testRepo) GetLineStats(ctx context.Context) (*storage.LineStats, error) {
	if r.stats != nil {
		return r.stats, nil
	}
	return &storage.LineStats{TotalItems: 42, RejectedItems: 2, Status: "running"}, nil
}

func setupRouter(repo storage.RepositoryInterface) *gin.Engine {
	gin.SetMode(gin.TestMode)
	r := gin.New()
	v1 := r.Group("/api/v1")

	lineH := &LineHandlers{Repo: repo}
	baleH := &BaleHandlers{Repo: repo, MQ: nil}
	baleTypeH := &BaleTypeHandlers{Repo: repo}

	lineH.RegisterRoutes(v1)
	baleH.RegisterRoutes(v1)
	baleTypeH.RegisterRoutes(v1)
	return r
}

func TestGetBales(t *testing.T) {
	repo := &testRepo{
		bales: []storage.Bale{{ID: 1, TypeID: 1, Type: "test", Timestamp: time.Now()}},
	}
	r := setupRouter(repo)

	req := httptest.NewRequest("GET", "/api/v1/bales", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}

	var resp []storage.Bale
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal response: %v", err)
	}
	if len(resp) != 1 {
		t.Errorf("expected 1 bale, got %d", len(resp))
	}
}

func TestCreateBale(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	body := bytes.NewBufferString(`{"typeId": 1}`)
	req := httptest.NewRequest("POST", "/api/v1/bales", body)
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

	var resp storage.Bale
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal response: %v", err)
	}
	if resp.TypeID != 1 {
		t.Errorf("expected typeId 1, got %d", resp.TypeID)
	}
}

func TestGetBalesWithTypeQuery(t *testing.T) {
	repo := &testRepo{
		baleTypes: []storage.BaleType{{ID: 1, Type: "standard"}},
	}
	r := setupRouter(repo)

	req := httptest.NewRequest("POST", "/api/v1/bales?type=standard", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

func TestGetBaleTypes(t *testing.T) {
	repo := &testRepo{
		baleTypes: []storage.BaleType{{ID: 1, Type: "PET", Weight: 10.0}},
	}
	r := setupRouter(repo)

	req := httptest.NewRequest("GET", "/api/v1/bale-types", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}

	var resp []storage.BaleType
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal response: %v", err)
	}
	if len(resp) != 1 {
		t.Errorf("expected 1 baleType, got %d", len(resp))
	}
	if resp[0].Type != "PET" {
		t.Errorf("expected type 'PET', got '%s'", resp[0].Type)
	}
}

func TestCreateBaleType(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	body := bytes.NewBufferString(`{"type": "HDPE", "weight": 15.5, "height": 100, "width": 80, "length": 120}`)
	req := httptest.NewRequest("POST", "/api/v1/bale-types", body)
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

func TestGetLineStages(t *testing.T) {
	repo := &testRepo{
		stages: []storage.LineStage{
			{ID: 1, Name: "Разгрузка", Order: 1, Equipment: "Рампа", MQTTTopic: "/sensor/weight"},
			{ID: 2, Name: "QR Сортировка", Order: 2, Equipment: "Camera", MQTTTopic: "/qr/result"},
		},
	}
	r := setupRouter(repo)

	req := httptest.NewRequest("GET", "/api/v1/line/stages", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}

	var resp []storage.LineStage
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal response: %v", err)
	}
	if len(resp) != 2 {
		t.Errorf("expected 2 stages, got %d", len(resp))
	}
}

func TestCreateLineStage(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	body := bytes.NewBufferString(`{"name": "Тестовый этап", "description": "Описание", "order": 99, "equipment": "Оборудование", "mqtt_topic": "/test/topic"}`)
	req := httptest.NewRequest("POST", "/api/v1/line/stages", body)
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

func TestCreateSensorReading(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	body := bytes.NewBufferString(`{"stage_id": 1, "sensor": "vibration", "value": 42.5, "unit": "mm/s"}`)
	req := httptest.NewRequest("POST", "/api/v1/sensors/readings", body)
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

func TestGetSensorReadingsByStage(t *testing.T) {
	repo := &testRepo{
		readings: []storage.SensorReading{
			{ID: 1, StageID: 1, Sensor: "vibration", Value: 42.5, Unit: "mm/s", Timestamp: time.Now()},
		},
	}
	r := setupRouter(repo)

	req := httptest.NewRequest("GET", "/api/v1/sensors/readings/stage/1", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}
}

func TestCreateProductionEvent(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	body := bytes.NewBufferString(`{"stage_id": 1, "event_type": "item_processed", "data": "success"}`)
	req := httptest.NewRequest("POST", "/api/v1/events", body)
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

func TestGetProductionEventsByStage(t *testing.T) {
	repo := &testRepo{
		events: []storage.ProductionEvent{
			{ID: 1, StageID: 1, EventType: "item_processed", Data: "success", Timestamp: time.Now()},
		},
	}
	r := setupRouter(repo)

	req := httptest.NewRequest("GET", "/api/v1/events/stage/1", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}
}

func TestGetLineStats(t *testing.T) {
	repo := &testRepo{
		stats: &storage.LineStats{
			TotalItems:    100,
			RejectedItems: 5,
			AvgSpeed:      1.5,
			CurrentStage:  "Экструзия",
			Status:        "running",
		},
	}
	r := setupRouter(repo)

	req := httptest.NewRequest("GET", "/api/v1/line/stats", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}

	var resp storage.LineStats
	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
		t.Fatalf("failed to unmarshal response: %v", err)
	}
	if resp.TotalItems != 100 {
		t.Errorf("expected totalItems 100, got %d", resp.TotalItems)
	}
	if resp.RejectedItems != 5 {
		t.Errorf("expected rejectedItems 5, got %d", resp.RejectedItems)
	}
	if resp.Status != "running" {
		t.Errorf("expected status 'running', got '%s'", resp.Status)
	}
}

func TestUpdateBaleType(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	body := bytes.NewBufferString(`{"type": "UPDATED", "weight": 20.0}`)
	req := httptest.NewRequest("PUT", "/api/v1/bale-types/1", body)
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}
}

func TestDeleteBaleType(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	req := httptest.NewRequest("DELETE", "/api/v1/bale-types/1", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}
}

func TestInvalidIDReturns400(t *testing.T) {
	repo := &testRepo{}
	r := setupRouter(repo)

	req := httptest.NewRequest("GET", "/api/v1/line/stages/abc", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusBadRequest {
		t.Errorf("expected %d, got %d", http.StatusBadRequest, w.Code)
	}
}

func TestHealthEndpoint(t *testing.T) {
	gin.SetMode(gin.TestMode)
	r := gin.New()
	r.GET("/health", func(c *gin.Context) {
		c.JSON(200, gin.H{"status": "ok"})
	})

	req := httptest.NewRequest("GET", "/health", nil)
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("expected %d, got %d", http.StatusOK, w.Code)
	}
}