using WxAgent.Core;
using Xunit;

namespace WxAgent.Core.Tests;

public sealed class WechatTextInputTests
{
    [Fact]
    public void PreservesMultilineWhitespaceWithCanonicalLineEndings()
    {
        Assert.Equal("first\n\n  second\t\nthird", WechatTextInput.Prepare("first\r\n\r\n  second\t\rthird"));
        Assert.Equal(new string('x', 4000), WechatTextInput.Prepare(new string('x', 4000)));
        Assert.Throws<WxAgentException>(() => WechatTextInput.Prepare(new string('x', 4001)));
    }

    [Theory]
    [InlineData("")]
    [InlineData(" \r\n\t")]
    [InlineData("before\0after")]
    [InlineData("before\u001bafter")]
    public void RejectsEmptyOrUnsafeInput(string input) =>
        Assert.Throws<WxAgentException>(() => WechatTextInput.Prepare(input));

    [Fact]
    public void QuoteParserPreservesBlankLinesAndIndentation()
    {
        const string reply = "first\n\n  second  ";
        var parsed = Assert.Single(VisibleMessageParser.Parse([reply + "\n引用 Alice 的消息 : original"]));
        Assert.Equal(reply, parsed.Text);
        Assert.Equal(ChatMessageType.Quote, parsed.Type);
        Assert.True(WechatSendConfirmation.Matches(parsed, new HashSet<string>(), ChatMessageType.Quote, reply));
        Assert.Equal("original", parsed.Quote!.Text);
    }
}