package csvimport

import (
	"strings"
	"testing"
)

func TestParseOK(t *testing.T) {
	rows, err := Parse(strings.NewReader("a@x,p1,a@y,p2\nb@x,p3,b@y,p4\n"))
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if len(rows) != 2 || rows[0].SrcLogin != "a@x" || rows[1].DstPass != "p4" {
		t.Fatalf("bad rows: %+v", rows)
	}
}

func TestParseRejectsBadColumns(t *testing.T) {
	if _, err := Parse(strings.NewReader("a,b,c\n")); err == nil {
		t.Fatal("3 columns must error")
	}
}

func TestParseRejectsDuplicateSrc(t *testing.T) {
	if _, err := Parse(strings.NewReader("a@x,p,a@y,p\na@x,q,c@y,q\n")); err == nil {
		t.Fatal("duplicate src_login must error")
	}
}

func TestParseRejectsEmptyField(t *testing.T) {
	if _, err := Parse(strings.NewReader("a@x,,a@y,p\n")); err == nil {
		t.Fatal("empty password must error")
	}
}

func TestParseBlankLineKeepsCorrectLineNumber(t *testing.T) {
	// blank physical line 2, malformed row on physical line 3
	_, err := Parse(strings.NewReader("a@x,p1,a@y,p2\n\nbad,row,here\n"))
	if err == nil {
		t.Fatal("expected error for 3-column row")
	}
	if !strings.Contains(err.Error(), "line 3") {
		t.Fatalf("error must reference physical line 3, got: %v", err)
	}
}

func TestParseZeroRowsErrors(t *testing.T) {
	if _, err := Parse(strings.NewReader("\n\n   \n")); err == nil {
		t.Fatal("expected error when no rows parsed")
	}
}

const kerioHeader = "Name;FullName;Description;Enable;DataSource;Authentication;Role;Groups;MailAddress\n"

func TestParseKerioOK(t *testing.T) {
	in := kerioHeader +
		"j.doe;Jane Doe;SrcPass11;Yes;Internal;Internal;No rights;all;j.doe\n" +
		"k.smith;Kim Smith;SrcPass22;Yes;Internal;Internal;No rights;all;k.smith\n"
	rows, err := ParseKerio(strings.NewReader(in), "example.test")
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if len(rows) != 2 {
		t.Fatalf("want 2 rows, got %d: %+v", len(rows), rows)
	}
	want := Row{
		SrcLogin: "j.doe@example.test", SrcPass: "SrcPass11",
		DstLogin: "j.doe@example.test", DstPass: "SrcPass11",
	}
	if rows[0] != want {
		t.Fatalf("row 0: got %+v, want %+v", rows[0], want)
	}
}

func TestParseKerioSkipsDisabledAndAdmin(t *testing.T) {
	in := kerioHeader +
		"admin;;AdminPass1;Yes;Internal;Internal;Account admin;;admin\n" +
		"o.disabled;;OffPass111;No;Internal;Internal;No rights;all;o.disabled\n" +
		"info;;InfoPass11;Yes;Internal;Internal;No rights;all;info\n"
	rows, err := ParseKerio(strings.NewReader(in), "example.test")
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if len(rows) != 1 || rows[0].SrcLogin != "info@example.test" {
		t.Fatalf("only the enabled non-admin row must survive, got %+v", rows)
	}
}

func TestParseKerioStripsBOM(t *testing.T) {
	in := "\ufeff" + kerioHeader + "info;;InfoPass11;Yes;Internal;Internal;No rights;all;info\n"
	rows, err := ParseKerio(strings.NewReader(in), "example.test")
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if len(rows) != 1 {
		t.Fatalf("want 1 row, got %+v", rows)
	}
}

func TestParseKerioRejectsMissingHeader(t *testing.T) {
	in := "j.doe;Jane Doe;SrcPass11;Yes;Internal;Internal;No rights;all;j.doe\n"
	if _, err := ParseKerio(strings.NewReader(in), "example.test"); err == nil {
		t.Fatal("a file without the Kerio header must error")
	}
}

func TestParseKerioRejectsBadDomain(t *testing.T) {
	in := kerioHeader + "info;;InfoPass11;Yes;Internal;Internal;No rights;all;info\n"
	for _, domain := range []string{"", "   ", "@example.test", "exam ple.test", "example", "info@example.test"} {
		if _, err := ParseKerio(strings.NewReader(in), domain); err == nil {
			t.Fatalf("domain %q must be rejected", domain)
		}
	}
}

func TestParseKerioTrimsAndLowercasesDomain(t *testing.T) {
	in := kerioHeader + "info;;InfoPass11;Yes;Internal;Internal;No rights;all;info\n"
	rows, err := ParseKerio(strings.NewReader(in), "  Example.TEST  ")
	if err != nil {
		t.Fatalf("parse: %v", err)
	}
	if rows[0].SrcLogin != "info@example.test" {
		t.Fatalf("domain must be trimmed and lowercased, got %q", rows[0].SrcLogin)
	}
}

func TestParseKerioRejectsEmptyPassword(t *testing.T) {
	in := kerioHeader + "info;;;Yes;Internal;Internal;No rights;all;info\n"
	if _, err := ParseKerio(strings.NewReader(in), "example.test"); err == nil {
		t.Fatal("an enabled account without a password must error")
	}
}

func TestParseKerioRejectsDuplicateName(t *testing.T) {
	in := kerioHeader +
		"info;;InfoPass11;Yes;Internal;Internal;No rights;all;info\n" +
		"info;;aaaaaaAa1;Yes;Internal;Internal;No rights;all;info\n"
	if _, err := ParseKerio(strings.NewReader(in), "example.test"); err == nil {
		t.Fatal("duplicate Name must error")
	}
}

func TestParseKerioZeroRowsErrors(t *testing.T) {
	in := kerioHeader + "admin;;AdminPass1;Yes;Internal;Internal;Account admin;;admin\n"
	if _, err := ParseKerio(strings.NewReader(in), "example.test"); err == nil {
		t.Fatal("expected error when every row is filtered out")
	}
}