//go:build integration

package mail

import (
	"os"
	"strconv"
	"testing"
)

// These tests require a GreenMail server reachable via env vars:
//
//	EMCLI_TEST_IMAP_HOST, EMCLI_TEST_IMAP_PORT, EMCLI_TEST_USER, EMCLI_TEST_PASS
//
// Run: go test -tags=integration ./internal/mail/
func testCfg(t *testing.T) IMAPConfig {
	t.Helper()
	host := os.Getenv("EMCLI_TEST_IMAP_HOST")
	if host == "" {
		t.Skip("EMCLI_TEST_IMAP_HOST not set; skipping IMAP integration test")
	}
	return IMAPConfig{
		Host:     host,
		Port:     atoiEnv(t, "EMCLI_TEST_IMAP_PORT"),
		Security: "starttls",
		Username: os.Getenv("EMCLI_TEST_USER"),
		Password: os.Getenv("EMCLI_TEST_PASS"),
	}
}

func TestSelectAndFetch(t *testing.T) {
	c, err := Dial(testCfg(t))
	if err != nil {
		t.Fatalf("Dial: %v", err)
	}
	defer c.Logout()

	uidv, maxUID, err := c.SelectFolder("INBOX")
	if err != nil {
		t.Fatalf("SelectFolder: %v", err)
	}
	if uidv == 0 {
		t.Fatal("uidvalidity should be non-zero")
	}
	headers, err := c.FetchHeaders("INBOX", nil)
	if err != nil {
		t.Fatalf("FetchHeaders: %v", err)
	}
	t.Logf("inbox has %d messages, maxUID=%d", len(headers), maxUID)
}

func atoiEnv(t *testing.T, k string) int {
	t.Helper()
	n, err := strconv.Atoi(os.Getenv(k))
	if err != nil {
		t.Fatalf("bad int env %s: %v", k, err)
	}
	return n
}