using Elternbeirat.Web.Shared;
using Markdig.Syntax;

namespace Elternbeirat.Web.Tests;

/// <summary>
/// Unit tests for the person cards of the "::: team" block: initials, avatar colour,
/// reading the list-item convention and the rendered card. Pure logic, no PocketBase
/// needed.
/// </summary>
public class TeamMemberTests
{
    [Theory]
    [InlineData("Jenny Reger-Stilgenbauer", "JR")] // a double name is one word
    [InlineData("Özlem Ünal", "ÖÜ")]              // umlauts kept, not folded to O/U
    [InlineData("ömer şahin", "ÖŞ")]              // lower case is raised
    [InlineData("Isabell", "I")]                   // a single word gives one letter
    [InlineData("Anna Maria Müller", "AM")]        // first and last word only
    [InlineData("  Maik   Palm ", "MP")]           // extra whitespace ignored
    [InlineData("", "")]
    [InlineData("123", "")]                        // no letter, no initials
    public void Initials_are_first_and_last_word(string name, string expected) =>
        TeamMember.InitialsOf(name).ShouldBe(expected);

    [Fact]
    public void Color_is_stable_and_in_range()
    {
        // Pinned values: the colour must not change between restarts or releases, so a
        // change to the hash shows up here instead of recolouring the board.
        TeamMember.ColorOf("Maik Palm").ShouldBe(TeamMember.ColorOf(" Maik Palm "));
        TeamMember.ColorOf("Maik Palm").ShouldBe(4);
        TeamMember.ColorOf("Gentiana Erol").ShouldBe(5);

        new[] { "Maik Palm", "Gentiana Erol", "Raul Chira", "Marion Leininger", "Isabell Vesper", "" }
            .ShouldAllBe(name => TeamMember.ColorOf(name) >= 1 && TeamMember.ColorOf(name) <= TeamMember.ColorCount);
    }

    [Fact]
    public void Item_with_role_duties_and_note_is_read_in_full()
    {
        var (member, note) = Read("- **Maik Palm** (Vorsitzender)  \n  *Schulkonferenz, Mensarat , Homepage*  \n  Mitglied im Schulbeirat.");

        member.Name.ShouldBe("Maik Palm");
        member.Role.ShouldBe("Vorsitzender");
        member.Duties.ShouldBe(["Schulkonferenz", "Mensarat", "Homepage"]);
        Markdown.PlainText(note).ShouldBe("Mitglied im Schulbeirat.");
    }

    [Fact]
    public void Item_without_role_still_reads_the_duties()
    {
        var (member, note) = Read("- **Jenny Reger-Stilgenbauer**  \n  *Schulkonferenz, Schaukasten*");

        member.Role.ShouldBeNull();
        member.Duties.ShouldBe(["Schulkonferenz", "Schaukasten"]);
        note.ShouldBeEmpty();
    }

    [Fact]
    public void Item_with_only_a_name_has_no_role_and_no_duties()
    {
        var (member, note) = Read("- **Isabell Vesper**");

        member.Name.ShouldBe("Isabell Vesper");
        member.Role.ShouldBeNull();
        member.Duties.ShouldBeEmpty();
        note.ShouldBeEmpty();
    }

    [Fact]
    public void Soft_line_breaks_count_like_hard_ones()
    {
        // Editors forget the two trailing spaces; the card must not depend on them.
        var (member, _) = Read("- **Raul Chira** (2. Stellvertreter)\n  *Mensarat*");

        member.Role.ShouldBe("2. Stellvertreter");
        member.Duties.ShouldBe(["Mensarat"]);
    }

    [Fact]
    public void Second_line_that_is_not_only_italic_becomes_the_note()
    {
        var (member, note) = Read("- **Rebecca Goldmann**  \n  Neu im Team, *herzlich willkommen*.");

        member.Duties.ShouldBeEmpty();
        Markdown.PlainText(note).ShouldBe("Neu im Team, herzlich willkommen.");
    }

    [Theory]
    [InlineData("- Michael Weber, Beisitz")]        // no bold at all
    [InlineData("- Beisitz: **Michael Weber**")]    // bold, but not at the start
    [InlineData("- *Michael Weber*")]               // italic, not bold
    public void Item_without_convention_is_not_read(string markdown) =>
        TeamMember.Read(FirstParagraph(markdown)).ShouldBeNull();

    [Fact]
    public void Team_block_renders_person_cards()
    {
        var html = Markdown.ToHtml(
            "::: team\n- **Maik Palm** (Vorsitzender)  \n  *Schulkonferenz, Mensarat*  \n  Siehe [Kontakt](/contact).\n:::");

        html.ShouldContain("<div class=\"team\">");
        html.ShouldContain($"<li class=\"{TeamMember.CardClass}\">");
        html.ShouldContain("<span class=\"team-avatar team-avatar-4\" aria-hidden=\"true\">MP</span>");
        html.ShouldContain("<strong class=\"team-name\">Maik Palm</strong>");
        html.ShouldContain("<span class=\"team-role\">Vorsitzender</span>");
        html.ShouldContain("<span class=\"team-duty\">Schulkonferenz</span>");
        html.ShouldContain("<span class=\"team-duty\">Mensarat</span>");
        html.ShouldContain("<span class=\"team-note\">Siehe <a href=\"/contact\">Kontakt</a>.</span>"); // links survive
        html.ShouldNotContain("(Vorsitzender)");
    }

    [Fact]
    public void Item_without_convention_renders_as_plain_card_with_its_text()
    {
        var html = Markdown.ToHtml("::: team\n- Michael Weber, Beisitz\n:::");

        html.ShouldContain($"<li class=\"{TeamMember.CardClass} {TeamMember.PlainCardClass}\">Michael Weber, Beisitz</li>");
        html.ShouldNotContain("team-avatar");
    }

    [Fact]
    public void Editor_text_in_a_card_is_escaped()
    {
        var html = Markdown.ToHtml("::: team\n- **<b>Name</b>** (Rolle \"x\")\n:::");

        html.ShouldNotContain("<b>");
        html.ShouldContain("&lt;b&gt;Name&lt;/b&gt;");
    }

    [Theory]
    [InlineData("::: team gross")]
    [InlineData("::: team groß")]
    [InlineData("::: team GROSS")]
    public void Large_modifier_adds_its_class(string opening) =>
        Markdown.ToHtml($"{opening}\n- **Maik Palm**\n:::").ShouldContain("<div class=\"team gross\">");

    [Fact]
    public void Mistyped_modifier_keeps_the_grid()
    {
        // A typo in the modifier costs the larger size, not the cards.
        var html = Markdown.ToHtml("::: team grss\n- **Maik Palm**\n:::");

        html.ShouldContain("<div class=\"team\">");
        html.ShouldContain("team-card");
    }

    [Fact]
    public void Lists_outside_a_team_block_are_untouched()
    {
        var html = Markdown.ToHtml("- **Maik Palm** (Vorsitzender)");

        html.ShouldBe("<ul>\n<li><strong>Maik Palm</strong> (Vorsitzender)</li>\n</ul>\n");
    }

    private static (TeamMember Member, Markdig.Syntax.Inlines.Inline[] Note) Read(string markdown) =>
        TeamMember.Read(FirstParagraph(markdown)) ?? throw new ShouldAssertException("The item was not read as a person.");

    private static ParagraphBlock FirstParagraph(string markdown) =>
        Markdown.Parse(markdown).Descendants<ParagraphBlock>().First();
}