package handlers

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

	"github.com/DATA-DOG/go-sqlmock"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestCRMHandler_ListCustomers(t *testing.T) {
	db, mock, err := sqlmock.New()
	require.NoError(t, err)
	defer db.Close()

	handler := NewCRMHandler(db)

	mock.ExpectQuery("SELECT id, name, email, phone, company, org_number, status, source, tags, assigned_to, created_at, updated_at FROM boc_customers").
		WithArgs("active").
		WillReturnRows(sqlmock.NewRows([]string{
			"id", "name", "email", "phone", "company", "org_number", "status", "source", "tags", "assigned_to", "created_at", "updated_at",
		}).AddRow(
			"cust-1", "Test AB", "test@test.com", "+46701234567", "Test AB", "559141-7042", "active", "web", "{tag1,tag2}", nil, time.Now(), time.Now(),
		))

	req := httptest.NewRequest(http.MethodGet, "/api/v1/crm/customers?status=active", nil)
	rr := httptest.NewRecorder()

	handler.ListCustomers(rr, req)

	assert.Equal(t, http.StatusOK, rr.Code)

	var response map[string]interface{}
	err = json.Unmarshal(rr.Body.Bytes(), &response)
	require.NoError(t, err)

	customers := response["customers"].([]interface{})
	assert.Len(t, customers, 1)
	assert.Equal(t, float64(1), response["total"])

	assert.NoError(t, mock.ExpectationsWereMet())
}

func TestCRMHandler_CreateCustomer(t *testing.T) {
	db, mock, err := sqlmock.New()
	require.NoError(t, err)
	defer db.Close()

	handler := NewCRMHandler(db)

	mock.ExpectQuery("INSERT INTO boc_customers").
		WithArgs("Test AB", "test@test.com", "+46701234567", "Test AB", "", "lead", "", nil).
		WillReturnRows(sqlmock.NewRows([]string{"id"}).AddRow("cust-1"))
	// NOTE: pq.Array([]string(nil)) becomes nil argument — sqlmock matches nil

	payload := Customer{
		Name:    "Test AB",
		Email:   "test@test.com",
		Phone:   "+46701234567",
		Company: "Test AB",
		Status:  "lead",
	}
	body, _ := json.Marshal(payload)

	req := httptest.NewRequest(http.MethodPost, "/api/v1/crm/customers", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	rr := httptest.NewRecorder()

	handler.CreateCustomer(rr, req)

	assert.Equal(t, http.StatusCreated, rr.Code)

	var response map[string]interface{}
	err = json.Unmarshal(rr.Body.Bytes(), &response)
	require.NoError(t, err)
	assert.Equal(t, "cust-1", response["id"])

	assert.NoError(t, mock.ExpectationsWereMet())
}

func TestCRMHandler_GetCustomer(t *testing.T) {
	db, mock, err := sqlmock.New()
	require.NoError(t, err)
	defer db.Close()

	_ = NewCRMHandler(db)

	mock.ExpectQuery("SELECT id, name, email, phone, company, org_number, status, source, tags, assigned_to, created_at, updated_at").
		WithArgs("cust-1").
		WillReturnRows(sqlmock.NewRows([]string{
			"id", "name", "email", "phone", "company", "org_number", "status", "source", "tags", "assigned_to", "created_at", "updated_at",
		}).AddRow(
			"cust-1", "Test AB", "test@test.com", "+46701234567", "Test AB", "559141-7042", "active", "web", nil, nil, time.Now(), time.Now(),
		))

	// Requires chi router context for URL params — test via router in integration tests
	t.Skip("Requires chi router context for URL params")

	assert.NoError(t, mock.ExpectationsWereMet())
}

func TestCRMHandler_GetPipeline(t *testing.T) {
	db, mock, err := sqlmock.New()
	require.NoError(t, err)
	defer db.Close()

	handler := NewCRMHandler(db)

	mock.ExpectQuery("SELECT stage, COUNT\\(\\*\\), COALESCE\\(SUM\\(value\\), 0\\)").
		WillReturnRows(sqlmock.NewRows([]string{"stage", "count", "sum"}).
			AddRow("prospect", 5, 100000.00).
			AddRow("qualified", 3, 75000.00).
			AddRow("proposal", 2, 50000.00))

	req := httptest.NewRequest(http.MethodGet, "/api/v1/crm/pipeline", nil)
	rr := httptest.NewRecorder()

	handler.GetPipeline(rr, req)

	assert.Equal(t, http.StatusOK, rr.Code)

	var response map[string]interface{}
	err = json.Unmarshal(rr.Body.Bytes(), &response)
	require.NoError(t, err)

	pipeline := response["pipeline"].([]interface{})
	assert.Len(t, pipeline, 3)

	assert.NoError(t, mock.ExpectationsWereMet())
}