package validator

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"gitlab.com/digineat/go-broker-test/internal/model"
)

func TestValidateTrade(t *testing.T) {
	tests := []struct {
		name      string
		trade     *model.Trade
		wantError bool
	}{
		{
			name: "Valid trade",
			trade: &model.Trade{
				Account:    "acc123",
				Symbol:     "EURUSD",
				Volume:     1.0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "buy",
			},
			wantError: false,
		},
		{
			name: "Missing required field - Account",
			trade: &model.Trade{
				Symbol:     "EURUSD",
				Volume:     1.0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "buy",
			},
			wantError: true,
		},
		{
			name: "Invalid Volume (gt=0)",
			trade: &model.Trade{
				Account:    "acc123",
				Symbol:     "EURUSD",
				Volume:     0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "buy",
			},
			wantError: true,
		},
		{
			name: "Invalid Side (oneof=buy sell)",
			trade: &model.Trade{
				Account:    "acc123",
				Symbol:     "EURUSD",
				Volume:     1.0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "hold",
			},
			wantError: true,
		},
		{
			name: "Custom validation fail - Symbol too short",
			trade: &model.Trade{
				Account:    "acc123",
				Symbol:     "EURUS",
				Volume:     1.0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "buy",
			},
			wantError: true,
		},
		{
			name: "Custom validation fail - Symbol too long",
			trade: &model.Trade{
				Account:    "acc123",
				Symbol:     "EURUSDT",
				Volume:     1.0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "buy",
			},
			wantError: true,
		},
		{
			name: "Custom validation fail - Symbol lowercase",
			trade: &model.Trade{
				Account:    "acc123",
				Symbol:     "eurusd",
				Volume:     1.0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "buy",
			},
			wantError: true,
		},
		{
			name: "Custom validation fail - Symbol with numbers",
			trade: &model.Trade{
				Account:    "acc123",
				Symbol:     "EURUS1",
				Volume:     1.0,
				OpenPrice:  1.1234,
				ClosePrice: 1.1250,
				Side:       "buy",
			},
			wantError: true,
		},
		{
			name: "Symbol with exactly 6 uppercase letters (valid by custom)",
			trade: &model.Trade{
				Account:    "validAcc",
				Symbol:     "AUDCAD",
				Volume:     0.5,
				OpenPrice:  0.9000,
				ClosePrice: 0.9050,
				Side:       "sell",
			},
			wantError: false,
		},
		{
			name: "Trade model with regex tag for symbol (if you switched from custom tag)",
			trade: &model.Trade{
				Account:    "accRegex",
				Symbol:     "GBPJPY",
				Volume:     10,
				OpenPrice:  150.0,
				ClosePrice: 150.5,
				Side:       "buy",
			},
			wantError: false,
		},
		{
			name: "Trade model with regex tag for symbol - invalid",
			trade: &model.Trade{
				Account:    "accRegexFail",
				Symbol:     "USDCAD!",
				Volume:     1,
				OpenPrice:  1.2,
				ClosePrice: 1.3,
				Side:       "sell",
			},
			wantError: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := ValidateTrade(tt.trade)
			if tt.wantError {
				assert.Error(t, err, "Expected an error for test case: %s", tt.name)
			} else {
				assert.NoError(t, err, "Expected no error for test case: %s", tt.name)
			}
		})
	}
}