package parser_test

import (
	"strings"
	"testing"

	"financeiro-carvalho/internal/model"
	"financeiro-carvalho/internal/parser"
)

const sampleOFX = `OFXHEADER:100
DATA:OFXSGML
VERSION:150

<OFX>
<BANKMSGSRSV1>
<STMTTRNRS>
<STMTRS>
<BANKTRANLIST>
<STMTTRN>
<TRNTYPE>DEBIT
<DTPOSTED>20240315120000[-3:BRT]
<TRNAMT>-150.90
<FITID>2024031500001
<MEMO>PAGTO BOLETO ENERGIA
</STMTTRN>
<STMTTRN>
<TRNTYPE>CREDIT
<DTPOSTED>20240320
<TRNAMT>5000.00
<FITID>2024032000001
<MEMO>SALARIO EMPRESA
</STMTTRN>
</BANKTRANLIST>
`

func TestParseOFX_BasicFields(t *testing.T) {
	rows, err := parser.ParseOFX(strings.NewReader(sampleOFX))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if len(rows) != 2 {
		t.Fatalf("expected 2 rows, got %d", len(rows))
	}

	debit := rows[0]
	if debit.Date != "2024-03-15" {
		t.Errorf("date: want 2024-03-15, got %q", debit.Date)
	}
	if debit.Amount != 150.90 {
		t.Errorf("amount: want 150.90, got %v", debit.Amount)
	}
	if debit.Type != "expense" {
		t.Errorf("type: want expense, got %q", debit.Type)
	}
	if debit.ExternalID != "2024031500001" {
		t.Errorf("external_id: got %q", debit.ExternalID)
	}
	if debit.Description != "PAGTO BOLETO ENERGIA" {
		t.Errorf("desc: got %q", debit.Description)
	}

	credit := rows[1]
	if credit.Type != "income" {
		t.Errorf("type: want income, got %q", credit.Type)
	}
	if credit.Amount != 5000.00 {
		t.Errorf("amount: want 5000.00, got %v", credit.Amount)
	}
}

func TestParseOFX_EmptyFile(t *testing.T) {
	rows, err := parser.ParseOFX(strings.NewReader(""))
	if err != nil {
		t.Fatal(err)
	}
	if len(rows) != 0 {
		t.Fatalf("expected 0 rows, got %d", len(rows))
	}
}

func TestParseCSV_Semicolon(t *testing.T) {
	// Brazilian bank CSV: semicolon separator, comma as decimal
	data := "15/03/2024;-150,90;SUPERMERCADO\n20/03/2024;5000,00;SALARIO\n"
	m := model.CSVMapping{
		DateColumn:        0,
		AmountColumn:      1,
		DescriptionColumn: 2,
		DateFormat:        "02/01/2006",
		HasHeader:         false,
		DecimalSeparator:  ",",
		FieldSeparator:    ";",
	}
	rows, errs := parser.ParseCSV(strings.NewReader(data), m)
	if len(errs) != 0 {
		t.Fatalf("unexpected errors: %v", errs)
	}
	if len(rows) != 2 {
		t.Fatalf("expected 2 rows, got %d", len(rows))
	}
	if rows[0].Date != "2024-03-15" {
		t.Errorf("date: got %q", rows[0].Date)
	}
	if rows[0].Amount != 150.90 {
		t.Errorf("amount: want 150.90, got %v", rows[0].Amount)
	}
	if rows[0].Type != "expense" {
		t.Errorf("type: got %q", rows[0].Type)
	}
	if rows[1].Type != "income" {
		t.Errorf("income type: got %q", rows[1].Type)
	}
}

func TestParseCSV_WithHeader(t *testing.T) {
	data := "Data;Valor;Descricao\n15/03/2024;-50,00;FARMACIA\n"
	m := model.CSVMapping{
		DateColumn:        0,
		AmountColumn:      1,
		DescriptionColumn: 2,
		DateFormat:        "02/01/2006",
		HasHeader:         true,
		DecimalSeparator:  ",",
		FieldSeparator:    ";",
	}
	rows, errs := parser.ParseCSV(strings.NewReader(data), m)
	if len(errs) != 0 {
		t.Fatalf("errors: %v", errs)
	}
	if len(rows) != 1 {
		t.Fatalf("expected 1 row (header skipped), got %d", len(rows))
	}
	if rows[0].Description != "FARMACIA" {
		t.Errorf("desc: got %q", rows[0].Description)
	}
}