using MeetingAssistant.MeetingNotes;
using Microsoft.Extensions.Logging.Abstractions;

namespace MeetingAssistant.Tests;

public sealed class MeetingArtifactStoreTests
{
    [Fact]
    public async Task StoreCreatesAssistantContextNoteLinkedToMeetingArtifacts()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var contextPath = Path.Combine(root, "Meetings", "Assistant Context", "20260519-context.md");
        var artifactStore = new MarkdownMeetingArtifactStore(NullLogger<MarkdownMeetingArtifactStore>.Instance);
        var artifacts = new MeetingSessionArtifacts(
            MeetingNotePath: Path.Combine(root, "Meetings", "Notes", "20260519-meeting.md"),
            TranscriptPath: Path.Combine(root, "Meetings", "Transcripts", "20260519-transcript.md"),
            AssistantContextPath: contextPath,
            SummaryPath: Path.Combine(root, "Meetings", "Summaries", "20260519-summary.md"));
        var meetingNote = MeetingNoteTemplate.Create(
            "Planning Sync",
            DateTimeOffset.Parse("2026-05-19T10:00:00+02:00"));

        await artifactStore.CreateAssistantContextAsync(
            artifacts,
            meetingNote,
            "Review previous decisions\nAgree next steps",
            DateTimeOffset.Parse("2026-05-19T11:00:00+02:00"),
            CancellationToken.None);

        var content = await File.ReadAllTextAsync(contextPath);
        Assert.Contains("# Assistant Context", content);
        Assert.StartsWith("---", content, StringComparison.Ordinal);
        Assert.Contains("title: Planning Sync", content);
        Assert.Contains("start_time: \"2026-05-19T10:00:00.0000000+02:00\"", content);
        Assert.Contains("state: collecting metadata", content);
        Assert.Contains("agenda: |-", content);
        Assert.Contains("  Review previous decisions", content);
        Assert.Contains("  Agree next steps", content);
        Assert.Contains("scheduled_end: \"2026-05-19T11:00:00.0000000+02:00\"", content);
        Assert.Contains("meeting: \"[[../Notes/20260519-meeting|Meeting Note]]\"", content);
        Assert.Contains("transcript: \"[[../Transcripts/20260519-transcript|Transcript]]\"", content);
        Assert.Contains("summary: \"[[../Summaries/20260519-summary|Summary]]\"", content);
        Assert.DoesNotContain("assistant_context:", content);
        Assert.Contains("[[../Notes/20260519-meeting|Meeting Note]]", content);
        Assert.Contains("[[../Transcripts/20260519-transcript|Transcript]]", content);
        Assert.Contains("[[../Summaries/20260519-summary|Summary]]", content);
    }

    [Fact]
    public async Task StoreUpdatesAssistantContextStateAndPreservesBody()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var contextPath = Path.Combine(root, "Meetings", "Assistant Context", "20260519-context.md");
        var artifactStore = new MarkdownMeetingArtifactStore(NullLogger<MarkdownMeetingArtifactStore>.Instance);
        var artifacts = new MeetingSessionArtifacts(
            MeetingNotePath: Path.Combine(root, "Meetings", "Notes", "20260519-meeting.md"),
            TranscriptPath: Path.Combine(root, "Meetings", "Transcripts", "20260519-transcript.md"),
            AssistantContextPath: contextPath,
            SummaryPath: Path.Combine(root, "Meetings", "Summaries", "20260519-summary.md"));
        var meetingNote = MeetingNoteTemplate.Create(
            "Planning Sync",
            DateTimeOffset.Parse("2026-05-19T10:00:00+02:00"));

        await artifactStore.CreateAssistantContextAsync(
            artifacts,
            meetingNote,
            "Initial agenda",
            DateTimeOffset.Parse("2026-05-19T11:00:00+02:00"),
            CancellationToken.None);
        await File.AppendAllTextAsync(contextPath, "Observed context line.");

        await artifactStore.UpdateAssistantContextStateAsync(
            artifacts,
            AssistantContextState.Summarizing,
            CancellationToken.None);

        var content = await File.ReadAllTextAsync(contextPath);
        Assert.Contains("state: summarizing", content);
        Assert.Contains("title: Planning Sync", content);
        Assert.Contains("start_time: \"2026-05-19T10:00:00.0000000+02:00\"", content);
        Assert.Contains("agenda: |-", content);
        Assert.Contains("  Initial agenda", content);
        Assert.Contains("scheduled_end: \"2026-05-19T11:00:00.0000000+02:00\"", content);
        Assert.Contains("Observed context line.", content);
    }

    [Fact]
    public async Task StoreOmitsScheduledEndWhenNoTeamsMeetingWasDetected()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var contextPath = Path.Combine(root, "Meetings", "Assistant Context", "20260519-context.md");
        var artifactStore = new MarkdownMeetingArtifactStore(NullLogger<MarkdownMeetingArtifactStore>.Instance);
        var artifacts = new MeetingSessionArtifacts(
            MeetingNotePath: Path.Combine(root, "Meetings", "Notes", "20260519-meeting.md"),
            TranscriptPath: Path.Combine(root, "Meetings", "Transcripts", "20260519-transcript.md"),
            AssistantContextPath: contextPath,
            SummaryPath: Path.Combine(root, "Meetings", "Summaries", "20260519-summary.md"));
        var meetingNote = MeetingNoteTemplate.Create(
            "Planning Sync",
            DateTimeOffset.Parse("2026-05-19T10:00:00+02:00"));

        await artifactStore.CreateAssistantContextAsync(artifacts, meetingNote, "", null, CancellationToken.None);

        var content = await File.ReadAllTextAsync(contextPath);
        Assert.DoesNotContain("scheduled_end:", content);
    }

    [Fact]
    public async Task StoreUpdatesAssistantContextMetadataAndMeetingFrontmatter()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var contextPath = Path.Combine(root, "Meetings", "Assistant Context", "20260519-context.md");
        var artifactStore = new MarkdownMeetingArtifactStore(NullLogger<MarkdownMeetingArtifactStore>.Instance);
        var artifacts = new MeetingSessionArtifacts(
            MeetingNotePath: Path.Combine(root, "Meetings", "Notes", "20260519-meeting.md"),
            TranscriptPath: Path.Combine(root, "Meetings", "Transcripts", "20260519-transcript.md"),
            AssistantContextPath: contextPath,
            SummaryPath: Path.Combine(root, "Meetings", "Summaries", "20260519-summary.md"));
        await artifactStore.CreateAssistantContextAsync(
            artifacts,
            MeetingNoteTemplate.Create("Meeting 2026-05-19 10:00", DateTimeOffset.Parse("2026-05-19T10:00:00+02:00")),
            "",
            null,
            CancellationToken.None);

        await artifactStore.UpdateAssistantContextMetadataAsync(
            artifacts,
            MeetingNoteTemplate.Create("Architecture Sync", DateTimeOffset.Parse("2026-05-19T10:00:00+02:00")),
            "Calendar agenda",
            DateTimeOffset.Parse("2026-05-19T11:00:00+02:00"),
            CancellationToken.None);

        var content = await File.ReadAllTextAsync(contextPath);
        Assert.Contains("title: Architecture Sync", content);
        Assert.Contains("start_time: \"2026-05-19T10:00:00.0000000+02:00\"", content);
        Assert.Contains("state: collecting metadata", content);
        Assert.Contains("agenda: |-", content);
        Assert.Contains("  Calendar agenda", content);
        Assert.Contains("scheduled_end: \"2026-05-19T11:00:00.0000000+02:00\"", content);
    }

    [Fact]
    public async Task StoreUpdatesAssistantContextMeetingEndAndPreservesCalendarMetadata()
    {
        var root = Path.Combine(Path.GetTempPath(), "meeting-assistant-tests", Guid.NewGuid().ToString("N"));
        var contextPath = Path.Combine(root, "Meetings", "Assistant Context", "20260519-context.md");
        var artifactStore = new MarkdownMeetingArtifactStore(NullLogger<MarkdownMeetingArtifactStore>.Instance);
        var artifacts = new MeetingSessionArtifacts(
            MeetingNotePath: Path.Combine(root, "Meetings", "Notes", "20260519-meeting.md"),
            TranscriptPath: Path.Combine(root, "Meetings", "Transcripts", "20260519-transcript.md"),
            AssistantContextPath: contextPath,
            SummaryPath: Path.Combine(root, "Meetings", "Summaries", "20260519-summary.md"));
        await artifactStore.CreateAssistantContextAsync(
            artifacts,
            MeetingNoteTemplate.Create("Architecture Sync", DateTimeOffset.Parse("2026-05-19T10:00:00+02:00")),
            "Calendar agenda",
            DateTimeOffset.Parse("2026-05-19T11:00:00+02:00"),
            CancellationToken.None);

        await artifactStore.UpdateAssistantContextMeetingAsync(
            artifacts,
            MeetingNoteTemplate.Create(
                "Architecture Sync",
                DateTimeOffset.Parse("2026-05-19T10:00:00+02:00"),
                DateTimeOffset.Parse("2026-05-19T10:30:00+02:00")),
            CancellationToken.None);

        var content = await File.ReadAllTextAsync(contextPath);
        Assert.Contains("title: Architecture Sync", content);
        Assert.Contains("start_time: \"2026-05-19T10:00:00.0000000+02:00\"", content);
        Assert.Contains("end_time: \"2026-05-19T10:30:00.0000000+02:00\"", content);
        Assert.Contains("agenda: |-", content);
        Assert.Contains("  Calendar agenda", content);
        Assert.Contains("scheduled_end: \"2026-05-19T11:00:00.0000000+02:00\"", content);
    }
}