import lib

// --- item creation ---

fn test_item_defaults_guid_to_link(): Unit with {Test} = {
    let i = lib.item("Title", "https://example.com/post", "Desc", "2025-01-01")
    Test.assertEqualMsg("https://example.com/post", lib.itemGuid(i), "guid defaults to link")
}

fn test_item_with_custom_guid(): Unit with {Test} = {
    let i = lib.itemWithGuid("Title", "https://example.com", "Desc", "2025-01-01", "custom-123")
    Test.assertEqualMsg("custom-123", lib.itemGuid(i), "custom guid preserved")
}

fn test_item_empty_fields(): Unit with {Test} = {
    let i = lib.item("", "", "", "")
    Test.assertEqualMsg("", lib.itemTitle(i), "empty title")
    Test.assertEqualMsg("", lib.itemLink(i), "empty link")
    Test.assertEqualMsg("", lib.itemDescription(i), "empty description")
    Test.assertEqualMsg("", lib.itemPubDate(i), "empty pubDate")
}

fn test_item_special_chars(): Unit with {Test} = {
    let i = lib.item("A & B <C>", "https://example.com?a=1&b=2", "\"quotes\" & <tags>", "2025-01-01")
    Test.assertEqualMsg("A & B <C>", lib.itemTitle(i), "special chars in title preserved")
    Test.assertEqualMsg("\"quotes\" & <tags>", lib.itemDescription(i), "special chars in desc preserved")
}

// --- all accessor functions ---

fn test_item_accessors(): Unit with {Test} = {
    let i = lib.item("T", "L", "D", "P")
    Test.assertEqualMsg("T", lib.itemTitle(i), "itemTitle")
    Test.assertEqualMsg("L", lib.itemLink(i), "itemLink")
    Test.assertEqualMsg("D", lib.itemDescription(i), "itemDescription")
    Test.assertEqualMsg("P", lib.itemPubDate(i), "itemPubDate")
    Test.assertEqualMsg("L", lib.itemGuid(i), "itemGuid defaults to link")
}

// --- date conversion for all months ---

fn test_date_january(): Unit with {Test} =
    Test.assertEqualMsg("15 Jan 2025 00:00:00 GMT", lib.isoToRfc822("2025-01-15"), "January")

fn test_date_february(): Unit with {Test} =
    Test.assertEqualMsg("28 Feb 2025 00:00:00 GMT", lib.isoToRfc822("2025-02-28"), "February")

fn test_date_march(): Unit with {Test} =
    Test.assertEqualMsg("01 Mar 2025 00:00:00 GMT", lib.isoToRfc822("2025-03-01"), "March")

fn test_date_april(): Unit with {Test} =
    Test.assertEqualMsg("30 Apr 2025 00:00:00 GMT", lib.isoToRfc822("2025-04-30"), "April")

fn test_date_may(): Unit with {Test} =
    Test.assertEqualMsg("01 May 2025 00:00:00 GMT", lib.isoToRfc822("2025-05-01"), "May")

fn test_date_june(): Unit with {Test} =
    Test.assertEqualMsg("15 Jun 2025 00:00:00 GMT", lib.isoToRfc822("2025-06-15"), "June")

fn test_date_july(): Unit with {Test} =
    Test.assertEqualMsg("04 Jul 2025 00:00:00 GMT", lib.isoToRfc822("2025-07-04"), "July")

fn test_date_august(): Unit with {Test} =
    Test.assertEqualMsg("20 Aug 2025 00:00:00 GMT", lib.isoToRfc822("2025-08-20"), "August")

fn test_date_september(): Unit with {Test} =
    Test.assertEqualMsg("10 Sep 2025 00:00:00 GMT", lib.isoToRfc822("2025-09-10"), "September")

fn test_date_october(): Unit with {Test} =
    Test.assertEqualMsg("31 Oct 2025 00:00:00 GMT", lib.isoToRfc822("2025-10-31"), "October")

fn test_date_november(): Unit with {Test} =
    Test.assertEqualMsg("11 Nov 2025 00:00:00 GMT", lib.isoToRfc822("2025-11-11"), "November")

fn test_date_december(): Unit with {Test} =
    Test.assertEqualMsg("25 Dec 2025 00:00:00 GMT", lib.isoToRfc822("2025-12-25"), "December")

fn test_date_short_string(): Unit with {Test} =
    Test.assertEqualMsg("bad", lib.isoToRfc822("bad"), "short string passthrough")

fn test_date_empty(): Unit with {Test} =
    Test.assertEqualMsg("", lib.isoToRfc822(""), "empty date passthrough")

fn test_date_partial(): Unit with {Test} =
    Test.assertEqualMsg("2025-01", lib.isoToRfc822("2025-01"), "partial date passthrough")

// --- feed creation ---

fn test_feed_default_language(): Unit with {Test} = {
    let f = lib.feed("Title", "https://example.com", "Desc", [])
    let xml = lib.render(f)
    Test.assert(String.contains(xml, "<language>en</language>"), "default language is en")
}

fn test_feed_custom_language(): Unit with {Test} = {
    let f = lib.feedWithLang("Title", "https://example.com", "Desc", "fr", [])
    let xml = lib.render(f)
    Test.assert(String.contains(xml, "<language>fr</language>"), "custom language fr")
}

fn test_feed_escapes_title(): Unit with {Test} = {
    let f = lib.feed("A & B", "https://example.com", "Desc", [])
    let xml = lib.render(f)
    Test.assert(String.contains(xml, "<title>A &amp; B</title>"), "feed title is escaped")
}

fn test_feed_escapes_description(): Unit with {Test} = {
    let f = lib.feed("Title", "https://example.com", "<b>Bold</b> desc", [])
    let xml = lib.render(f)
    Test.assert(String.contains(xml, "&lt;b&gt;Bold&lt;/b&gt;"), "feed description is escaped")
}