package com.goldenchart.service;

import com.goldenchart.entity.GcAppSettings;
import com.goldenchart.entity.GcPaperAccount;
import com.goldenchart.entity.GcPaperSymbolAllocation;
import com.goldenchart.repository.GcPaperPositionRepository;
import com.goldenchart.repository.GcPaperSymbolAllocationRepository;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import java.math.BigDecimal;
import java.util.Optional;

import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.ArgumentMatchers.*;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
class PaperAllocationServiceTest {

    @Mock private GcPaperSymbolAllocationRepository allocRepo;
    @Mock private GcPaperPositionRepository positionRepo;

    private PaperAllocationService service;

    @BeforeEach
    void setUp() {
        service = new PaperAllocationService(allocRepo, positionRepo);
    }

    @Test
    void validateBuy_rejectsWhenExceedsSymbolLimit() {
        GcPaperAccount account = GcPaperAccount.builder()
                .id(1L)
                .cashBalance(BigDecimal.valueOf(10_000_000))
                .reservedCash(BigDecimal.ZERO)
                .initialCapitalSnapshot(BigDecimal.valueOf(10_000_000))
                .build();
        GcAppSettings app = new GcAppSettings();
        app.setPaperAutoTradeBudgetPct(BigDecimal.valueOf(100));

        GcPaperSymbolAllocation alloc = GcPaperSymbolAllocation.builder()
                .accountId(1L)
                .symbol("KRW-BTC")
                .maxInvestKrw(BigDecimal.valueOf(100_000))
                .isActive(true)
                .build();
        when(allocRepo.findByAccountIdAndSymbol(1L, "KRW-BTC")).thenReturn(Optional.of(alloc));
        when(positionRepo.findByAccountIdAndSymbol(1L, "KRW-BTC")).thenReturn(Optional.empty());

        assertThrows(IllegalStateException.class, () ->
                service.validateBuy(account, app, "KRW-BTC", BigDecimal.valueOf(200_000), false));
    }

    @Test
    void validateBuy_rejectsInactiveSymbol() {
        GcPaperAccount account = GcPaperAccount.builder()
                .id(1L)
                .cashBalance(BigDecimal.valueOf(10_000_000))
                .reservedCash(BigDecimal.ZERO)
                .initialCapitalSnapshot(BigDecimal.valueOf(10_000_000))
                .build();
        GcAppSettings app = new GcAppSettings();

        GcPaperSymbolAllocation alloc = GcPaperSymbolAllocation.builder()
                .accountId(1L)
                .symbol("KRW-BTC")
                .maxInvestKrw(BigDecimal.valueOf(5_000_000))
                .isActive(false)
                .build();
        when(allocRepo.findByAccountIdAndSymbol(1L, "KRW-BTC")).thenReturn(Optional.of(alloc));

        assertThrows(IllegalStateException.class, () ->
                service.validateBuy(account, app, "KRW-BTC", BigDecimal.valueOf(10_000), false));
    }
}