using System.Collections.Generic;
using System.Globalization;
using System.Text.RegularExpressions;
using AibisDream.Utility;
using NUnit.Framework;
using UnityEngine;
using UnityEngine.TestTools;
using Yarn.Markup;
using Yarn.Unity;

namespace AibisDream.SystemEditor.Tests
{
    public sealed class YarnLineMetadataTests
    {
        [Test]
        public void AutoNext_UsesDefaultOrInvariantParameterizedDelay()
        {
            var plain = LineInfo.Generate(CreateLine("auto_next"));
            Assert.That(plain.isAutoSkip, Is.True);
            Assert.That(plain.CalcAutoNextDelayTime(), Is.EqualTo(ConstRef.FixedDelay));

            var originalCulture = CultureInfo.CurrentCulture;
            try
            {
                CultureInfo.CurrentCulture = new CultureInfo("de-DE");
                var parameterized = LineInfo.Generate(CreateLine("auto_next:4.5"));
                Assert.That(parameterized.isAutoSkip, Is.True);
                Assert.That(parameterized.autoNextDelaySeconds, Is.EqualTo(4.5f));
                Assert.That(parameterized.CalcAutoNextDelayTime(), Is.EqualTo(4500));
            }
            finally
            {
                CultureInfo.CurrentCulture = originalCulture;
            }
        }

        [Test]
        public void AutoNext_InvalidValueFallsBackAndSimilarTagIsIgnored()
        {
            LogAssert.Expect(LogType.Warning, new Regex("auto_next 参数无效"));
            var invalid = LineInfo.Generate(CreateLine("auto_next:abc"));

            Assert.That(invalid.isAutoSkip, Is.True);
            Assert.That(invalid.autoNextDelaySeconds, Is.Null);
            Assert.That(invalid.CalcAutoNextDelayTime(), Is.EqualTo(ConstRef.FixedDelay));

            var similar = CreateLine("AUTO_NEXT", "auto_next_extra:4.5");
            Assert.That(similar.IsAutoSkipLine(), Is.False);
            Assert.That(similar.TryGetAutoNextDelaySeconds(out _), Is.False);
        }

        [Test]
        public void OptionPrompt_RequiresExactMetadataTag()
        {
            Assert.That(CreateLine(YarnUtil.OptionPrompt).IsOptionPromptLine(), Is.True);
            Assert.That(CreateLine("OPTION_PROMPT").IsOptionPromptLine(), Is.False);
            Assert.That(CreateLine("option_prompts").IsOptionPromptLine(), Is.False);
            Assert.That(
                new LocalizedLine { Metadata = null }.IsOptionPromptLine(),
                Is.False);
        }

        private static LocalizedLine CreateLine(params string[] metadata)
        {
            return new LocalizedLine
            {
                TextID = "line:yarn-metadata-contract",
                Metadata = metadata,
                Text = new MarkupParseResult(
                    "Test line",
                    new List<MarkupAttribute>())
            };
        }
    }
}