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));
    }

    [Theory]
    [InlineData(0x0036u, "Action cancelled!")]
    [InlineData(0x003Du, "You charged too far!")]
    [InlineData(0x004Au, "Ack! You killed yourself!")]
    [InlineData(0x0550u, "Out of Range!")]
    public void Format_CombatMovementErrors(uint code, string expected)
        => Assert.Equal(expected, WeenieErrorMessages.Format(code, null));

    // ── PK status codes ───────────────────────────────────────────────

    [Fact]
    public void Format_YouAreNonPKAgain_ExactRetailText()
    {
        // 0x0504 = WeenieError.YouAreNonPKAgain. Filed after the user saw
        // "WeenieError 0x0504" on login following a PK Lite status
        // reversion. Retail: ClientCommunicationSystem::HandleFailureEvent
        // @0x00571990 case 0x504 @0x005745cd; string recovered byte-exact
        // from data_7d32c0 in the PDB-paired binary (the pseudo-C dump
        // truncates at the declared 0x5f-wchar16 array bound, mid-sentence
        // at "...protection of the Lig").
        Assert.Equal(
            "You are enveloped in a feeling of warmth as you are brought back into the protection of the Light. You are once again a Non-Player Killer.",
            WeenieErrorMessages.Format(0x0504, null));
    }

    [Fact]
    public void Format_YoureTooCloseToYourSanctuary()
    {
        // 0x0505, case 0x505 @0x00574c65, data_7d2640.
        Assert.Equal(
            "You're too close to your sanctuary!",
            WeenieErrorMessages.Format(0x0505, null));
    }

    [Fact]
    public void Format_CannotChangePKStatusWhileRecovering()
    {
        // 0x04EC, case 0x4ec @0x0057446f, data_7d3820.
        Assert.Equal(
            "You cannot modify your player killer status while you are recovering from a PK death.",
            WeenieErrorMessages.Format(0x04EC, null));
    }

    [Fact]
    public void Format_AdvocatesCannotChangePKStatus()
    {
        // 0x04ED, case 0x4ed @0x005744a1, data_7d37b0.
        Assert.Equal(
            "Advocates may not change their player killer status!",
            WeenieErrorMessages.Format(0x04ED, null));
    }

    [Fact]
    public void Format_AdjacentUnmappedPKCode_StillFallsBackToHex()
    {
        // 0x04EE (LevelTooLowToChangePKStatusWithObject) sits right next
        // to the codes above but its retail literal
        // ("Your level is too low to change…") was NOT independently
        // byte-recovered in this pass — confirms the fallback still
        // covers the untouched neighbours rather than silently guessing.
        Assert.Equal("WeenieError 0x04EE", WeenieErrorMessages.Format(0x04EE, 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"));
    }

    [Fact]
    public void Format_HealingTargetAlreadyFull_SubstitutesParam()
    {
        Assert.Equal(
            "+Acdream is already at full health!",
            WeenieErrorMessages.Format(0x04FF, "+Acdream"));
    }
}