using AcDream.Core.Chat;

namespace AcDream.Core.Tests.Chat;

/// <summary>
/// Tests for <see cref="WeenieErrorMessages"/>. The retail client showed
/// these as plain-language strings; we mirror that via templated lookup.
/// Filed after the 2026-04-25 live launch where the user saw cryptic
/// "WeenieError 0x051B" in chat for what was actually a friendly login
/// notification.
/// </summary>
public sealed class WeenieErrorMessagesTests
{
    // ── known codes — informational, parameterised ───────────────────

    [Fact]
    public void Format_YouHaveEnteredChannel_SubstitutesParam()
    {
        // 0x051B = WeenieErrorWithString.YouHaveEnteredThe_Channel.
        // Template "You have entered the _ channel." with `_` placeholder.
        Assert.Equal(
            "You have entered the General channel.",
            WeenieErrorMessages.Format(0x051B, "General"));
    }

    [Fact]
    public void Format_YouHaveEnteredChannel_WorksForEachChannelName()
    {
        Assert.Equal("You have entered the Trade channel.",   WeenieErrorMessages.Format(0x051B, "Trade"));
        Assert.Equal("You have entered the LFG channel.",     WeenieErrorMessages.Format(0x051B, "LFG"));
        Assert.Equal("You have entered the Roleplay channel.",WeenieErrorMessages.Format(0x051B, "Roleplay"));
    }

    [Fact]
    public void Format_YouHaveLeftChannel_SubstitutesParam()
    {
        Assert.Equal(
            "You have left the General channel.",
            WeenieErrorMessages.Format(0x051C, "General"));
    }

    // ── known codes — informational, no parameter ────────────────────

    [Fact]
    public void Format_TurbineChatIsEnabled_NoParamForm()
    {
        // 0x051D came in WeenieError (no param) form at login.
        Assert.Equal(
            "Turbine Chat is enabled.",
            WeenieErrorMessages.Format(0x051D, param: null));
    }

    // ── known codes — error-level ────────────────────────────────────

    [Fact]
    public void Format_CharacterNotAvailable_NoParam()
    {
        // 0x052B fired by the server when a Tell target lookup fails
        // (e.g. the user typed "/t je, hello" → server got "je," → no
        // character). Should read like the retail message.
        Assert.Equal(
            "That person is not available now.",
            WeenieErrorMessages.Format(0x052B, param: null));
    }

    [Fact]
    public void Format_TradeComplete()
    {
        Assert.Equal("Trade Complete!", WeenieErrorMessages.Format(0x0529, null));
    }

    [Fact]
    public void Format_ThatIsNotAValidCommand()
    {
        // 0x0026 fires on /-prefixed text that ACE's command parser
        // can't resolve. Filed after a 2026-04-25 trace where /help
        // produced cryptic "WeenieError 0x0026" lines.
        Assert.Equal(
            "That is not a valid command.",
            WeenieErrorMessages.Format(0x0026, null));
    }

    [Fact]
    public void Format_YouAreNotInAllegiance()
    {
        Assert.Equal(
            "You are not in an allegiance!",
            WeenieErrorMessages.Format(0x0414, null));
    }

    [Fact]
    public void Format_YouDoNotBelongToAFellowship()
    {
        Assert.Equal(
            "You do not belong to a Fellowship.",
            WeenieErrorMessages.Format(0x050F, null));
    }

    // ── unknown codes — graceful fallback preserves debug info ───────

    [Fact]
    public void Format_UnknownCode_NoParam_FallsBackToHexForm()
    {
        Assert.Equal("WeenieError 0xABCD", WeenieErrorMessages.Format(0xABCD, null));
    }

    [Fact]
    public void Format_UnknownCode_WithParam_FallsBackToColonForm()
    {
        Assert.Equal(
            "WeenieError 0xDEAD: Mana Stone",
            WeenieErrorMessages.Format(0xDEAD, "Mana Stone"));
    }

    [Fact]
    public void Format_UnknownCode_EmptyParam_StaysAsHexOnly()
    {
        // Empty string param shouldn't add a stray colon.
        Assert.Equal("WeenieError 0xCAFE", WeenieErrorMessages.Format(0xCAFE, ""));
    }

    // ── parameterised templates with non-trivial params ──────────────

    [Fact]
    public void Format_HearListAdded_SubstitutesParam()
    {
        Assert.Equal(
            "Caith has been added to the list of people you can hear.",
            WeenieErrorMessages.Format(0x0521, "Caith"));
    }

    [Fact]
    public void Format_FailToAffectCannotBeHarmed_SubstitutesParam()
    {
        Assert.Equal(
            "You fail to affect Drudge because they cannot be harmed!",
            WeenieErrorMessages.Format(0x004F, "Drudge"));
    }
}