using MeetingAssistant.MeetingNotes;
using MeetingAssistant.Speakers;
using MeetingAssistant.Transcription;
using System.Diagnostics;
using System.Text.Json;
using YamlDotNet.Serialization;

namespace MeetingAssistant.Summary;

public sealed class MeetingSummaryTools
{
    private static readonly IDeserializer YamlDeserializer = new DeserializerBuilder()
        .IgnoreUnmatchedProperties()
        .Build();

    private readonly MeetingSessionArtifacts artifacts;
    private readonly MeetingAssistantOptions options;
    private readonly IDictationWordStore? dictationWordStore;
    private readonly SummaryAgentWriteAudit? writeAudit;
    private readonly BoundMeetingProjectResolver projectResolver;

    public MeetingSummaryTools(MeetingSessionArtifacts artifacts)
        : this(artifacts, new MeetingAssistantOptions(), null)
    {
    }

    public MeetingSummaryTools(
        MeetingSessionArtifacts artifacts,
        MeetingAssistantOptions options,
        IDictationWordStore? dictationWordStore = null,
        SummaryAgentWriteAudit? writeAudit = null)
    {
        this.artifacts = artifacts;
        this.options = options;
        this.dictationWordStore = dictationWordStore;
        this.writeAudit = writeAudit;
        projectResolver = new BoundMeetingProjectResolver(options);
    }

    public Task<string> ReadTranscript(int? @from = null, int? to = null)
    {
        return ReadIfExistsAsync(artifacts.TranscriptPath, @from, to);
    }

    public Task<string> ReadMeetingNote(int? @from = null, int? to = null)
    {
        return ReadIfExistsAsync(artifacts.MeetingNotePath, @from, to);
    }

    public Task<string> ReadContext(int? @from = null, int? to = null)
    {
        return ReadIfExistsAsync(artifacts.AssistantContextPath, @from, to);
    }

    public async Task<string> ReadUserNotes(int? @from = null, int? to = null)
    {
        if (!File.Exists(artifacts.MeetingNotePath))
        {
            return "";
        }

        var content = await File.ReadAllTextAsync(artifacts.MeetingNotePath);
        var document = MarkdownDocumentParser.SplitOptional(content);
        var body = document.HasFrontmatter ? document.Body.Trim() : content;
        return ReadLines(body, @from, to);
    }

    public Task<string> ReadGlossary(int? @from = null, int? to = null)
    {
        return ReadIfExistsAsync(VaultPath.Resolve(options.Vault, options.Vault.DictationWordsPath), @from, to);
    }

    public async Task<string> AddDictationWord(string word)
    {
        if (dictationWordStore is null)
        {
            return "Dictation word store is not available.";
        }

        if (string.IsNullOrWhiteSpace(word))
        {
            return "Refused: word must not be empty.";
        }

        if (writeAudit is not null)
        {
            IReadOnlyList<string>? capturedWords = null;
            await writeAudit.CaptureFileWriteAsync(
                VaultPath.Resolve(options.Vault, options.Vault.DictationWordsPath),
                async () => capturedWords = await dictationWordStore.AddWordAsync(word, options, CancellationToken.None));
            return $"Added '{word.Trim()}'. Dictionary now contains {capturedWords?.Count ?? 0} word(s).";
        }

        var words = await dictationWordStore.AddWordAsync(word, options, CancellationToken.None);
        return $"Added '{word.Trim()}'. Dictionary now contains {words.Count} word(s).";
    }

    public async Task<string> AddAttendee(string attendee)
    {
        if (string.IsNullOrWhiteSpace(attendee))
        {
            return "Refused: attendee must not be empty.";
        }

        var displayName = attendee.Trim();
        var normalized = MeetingAttendeeNames.NormalizeDisplayName(displayName);
        if (string.IsNullOrWhiteSpace(normalized))
        {
            return "Refused: attendee must not be empty.";
        }

        var note = await ReadMeetingNoteAsync();
        if (note.Frontmatter.Attendees.Any(existing => string.Equals(
            MeetingAttendeeNames.NormalizeDisplayName(existing),
            normalized,
            StringComparison.OrdinalIgnoreCase)))
        {
            return $"Attendee {normalized} already exists.";
        }

        note.Frontmatter.Attendees.Add(displayName);
        await WriteMeetingNoteAsync(note);
        return $"Added attendee {displayName}.";
    }

    public async Task<string> RemoveAttendee(string attendee)
    {
        if (string.IsNullOrWhiteSpace(attendee))
        {
            return "Refused: attendee must not be empty.";
        }

        var normalized = MeetingAttendeeNames.NormalizeDisplayName(attendee);
        if (string.IsNullOrWhiteSpace(normalized))
        {
            return "Refused: attendee must not be empty.";
        }

        var note = await ReadMeetingNoteAsync();
        var removed = note.Frontmatter.Attendees.RemoveAll(existing => string.Equals(
            MeetingAttendeeNames.NormalizeDisplayName(existing),
            normalized,
            StringComparison.OrdinalIgnoreCase));
        if (removed == 0)
        {
            return $"Attendee {normalized} was not present.";
        }

        await WriteMeetingNoteAsync(note);
        return $"Removed attendee {normalized}.";
    }

    public async Task<string> OverrideSpeaker(string speaker, string replacement, bool merge = false)
    {
        if (string.IsNullOrWhiteSpace(speaker) || string.IsNullOrWhiteSpace(replacement))
        {
            return "Refused: speaker and replacement must not be empty.";
        }

        if (!File.Exists(artifacts.AssistantContextPath))
        {
            return $"Refused: assistant context file does not exist at {artifacts.AssistantContextPath}.";
        }

        var speakerOverride = new SpeakerOverride(speaker.Trim(), replacement.Trim(), merge);
        if (string.Equals(speakerOverride.From, speakerOverride.To, StringComparison.OrdinalIgnoreCase))
        {
            return "Refused: speaker and replacement must be different.";
        }

        if (!merge && await SpeakerOverrideArtifacts.TranscriptContainsSpeakerAsync(
            artifacts.TranscriptPath,
            speakerOverride.To,
            CancellationToken.None))
        {
            return $"Refused: transcript already contains speaker {speakerOverride.To}. Call override_speaker with merge=true only when you are certain both speakers are the same identity.";
        }

        await SpeakerOverrideArtifacts.ApplyToTranscriptAsync(artifacts.TranscriptPath, speakerOverride);
        await SpeakerOverrideArtifacts.AppendToAssistantContextAsync(artifacts.AssistantContextPath, speakerOverride);
        return merge
            ? $"Merged speaker {speakerOverride.From} into {speakerOverride.To}."
            : $"Overrode speaker {speakerOverride.From} with {speakerOverride.To}.";
    }

    public async Task<string> DeleteIdentity(string identity)
    {
        if (string.IsNullOrWhiteSpace(identity))
        {
            return "Refused: identity must not be empty.";
        }

        if (!File.Exists(artifacts.AssistantContextPath))
        {
            return $"Refused: assistant context file does not exist at {artifacts.AssistantContextPath}.";
        }

        var deletion = await SpeakerOverrideArtifacts.ApplyDeletionToTranscriptAsync(
            artifacts.TranscriptPath,
            identity,
            CancellationToken.None);
        await SpeakerOverrideArtifacts.AppendIdentityDeletionToAssistantContextAsync(
            artifacts.AssistantContextPath,
            deletion,
            CancellationToken.None);
        return $"Deleted identity {deletion.Identity} and relabeled transcript speaker mentions to {deletion.Replacement}.";
    }

    public async Task<string> WriteSummary(string markdown, string oneliner, string? title = null)
    {
        if (string.IsNullOrWhiteSpace(oneliner))
        {
            return "Refused: oneliner must not be empty.";
        }

        var trimmedOneLiner = oneliner.Trim();
        if (ContainsLineBreak(trimmedOneLiner))
        {
            return "Refused: oneliner must be a single line.";
        }

        Directory.CreateDirectory(Path.GetDirectoryName(artifacts.SummaryPath)!);
        var meetingNote = await ReadMeetingNoteAsync();
        var summaryTitle = string.IsNullOrWhiteSpace(meetingNote.Frontmatter.Title)
            ? title
            : meetingNote.Frontmatter.Title;
        var frontmatter = await MeetingSummaryFrontmatterFactory.CreateAsync(
            artifacts,
            meetingNote,
            string.IsNullOrWhiteSpace(summaryTitle) ? "Meeting Summary" : summaryTitle,
            CancellationToken.None);
        frontmatter.OneLiner = trimmedOneLiner;
        await File.WriteAllTextAsync(
            artifacts.SummaryPath,
            MeetingArtifactFrontmatterRenderer.Render(frontmatter, markdown));
        SummaryWasWritten = true;
        return artifacts.SummaryPath;
    }

    private static bool ContainsLineBreak(string value)
    {
        return value.Contains('\n', StringComparison.Ordinal) ||
            value.Contains('\r', StringComparison.Ordinal);
    }

    public bool SummaryWasWritten { get; private set; }

    public async Task<string> WriteContext(
        string content,
        int? @from = null,
        int? to = null,
        int? insert = null)
    {
        var editMode = FileLineEditMode.Create(@from, to, insert);
        if (editMode is null)
        {
            return "Refused: supply either both from and to for replacement, insert for insertion, or no line arguments for overwrite.";
        }

        if (!File.Exists(artifacts.AssistantContextPath))
        {
            return $"Refused: assistant context file does not exist at {artifacts.AssistantContextPath}.";
        }

        var existing = await File.ReadAllTextAsync(artifacts.AssistantContextPath);
        var (frontmatter, body) = MeetingArtifactFrontmatterRenderer.Split(existing);
        var updatedBody = ApplyLineEdit(body, StripAccidentalFrontmatter(content), editMode);
        var updated = string.IsNullOrWhiteSpace(frontmatter)
            ? updatedBody
            : "---" + Environment.NewLine + frontmatter + Environment.NewLine + "---" + Environment.NewLine + Environment.NewLine + updatedBody;

        await File.WriteAllTextAsync(artifacts.AssistantContextPath, updated);
        return artifacts.AssistantContextPath;
    }

    private static string StripAccidentalFrontmatter(string content)
    {
        var document = MarkdownDocumentParser.SplitOptional(content);
        return document.HasFrontmatter ? document.Body : content;
    }

    public async Task<string> ListProjects()
    {
        var projects = await GetBoundProjectsAsync();
        return string.Join('\n', projects.Select(project => project.Name));
    }

    public async Task<string> ListProjectFiles(string project)
    {
        var projectRoot = await ResolveBoundProjectRootAsync(project);
        if (projectRoot is null)
        {
            return "";
        }

        var files = Directory.EnumerateFiles(projectRoot, "*", SearchOption.AllDirectories)
            .Select(path => ToToolPath(Path.GetRelativePath(projectRoot, path)))
            .Order(StringComparer.Ordinal);
        return string.Join('\n', files);
    }

    public async Task<string> ReadProjectFile(string project, string path, int? @from = null, int? to = null)
    {
        var filePath = await ResolveBoundProjectFilePathAsync(project, path);
        if (filePath is null || !File.Exists(filePath))
        {
            return "";
        }

        return ReadLines(await File.ReadAllTextAsync(filePath), @from, to);
    }

    public async Task<string> WriteProjectFile(
        string project,
        string path,
        string content,
        int? @from = null,
        int? to = null,
        int? insert = null)
    {
        var editMode = FileLineEditMode.Create(@from, to, insert);
        if (editMode is null)
        {
            return "Refused: supply either both from and to for replacement, insert for insertion, or no line arguments for overwrite.";
        }

        var target = ResolveExistingProjectFilePath(project, path);
        if (target is null)
        {
            return "Refused: project does not exist or the path escapes the project folder.";
        }

        Directory.CreateDirectory(Path.GetDirectoryName(target.Path)!);
        if (writeAudit is not null)
        {
            await writeAudit.CaptureFileWriteAsync(
                target.Path,
                () => WriteProjectFileContentAsync(target.Path, content, editMode));
        }
        else
        {
            await WriteProjectFileContentAsync(target.Path, content, editMode);
        }

        return $"{target.Project.Name}/{ToToolPath(path)}";
    }

    public async Task<string> Search(string keywords, string[]? projects = null)
    {
        if (string.IsNullOrWhiteSpace(keywords))
        {
            return "";
        }

        var selectedProjects = await GetSearchProjectsAsync(projects);
        if (selectedProjects.Count == 0)
        {
            return "";
        }

        var projectsRoot = GetProjectsRoot();
        var result = await RunRipgrepAsync(projectsRoot, selectedProjects, keywords);
        return result is not null
            ? FormatRipgrepJson(result, selectedProjects.Count == 1)
            : SearchWithRegexFallback(selectedProjects, keywords, selectedProjects.Count == 1);
    }

    private static async Task<string> ReadIfExistsAsync(string path, int? from = null, int? to = null)
    {
        if (!File.Exists(path))
        {
            return "";
        }

        var content = await File.ReadAllTextAsync(path);
        return ReadLines(content, from, to);
    }

    private async Task<MeetingNote> ReadMeetingNoteAsync()
    {
        if (!File.Exists(artifacts.MeetingNotePath))
        {
            return new MeetingNote("", new MeetingNoteFrontmatter(), "");
        }

        var content = await File.ReadAllTextAsync(artifacts.MeetingNotePath);
        var document = MarkdownDocumentParser.SplitOptional(content);
        var frontmatter = new MeetingNoteFrontmatter();
        if (document.HasFrontmatter)
        {
            var note = YamlDeserializer.Deserialize<MeetingNoteFrontmatterYaml>(document.Frontmatter) ?? new MeetingNoteFrontmatterYaml();
            frontmatter.Title = note.Title ?? "";
            frontmatter.StartTime = ParseDateTime(note.StartTime);
            frontmatter.EndTime = ParseDateTime(note.EndTime);
            frontmatter.Attendees = note.Attendees ?? [];
            frontmatter.Projects = note.Projects ?? [];
            frontmatter.Transcript = note.Transcript ?? "";
            frontmatter.AssistantContext = note.AssistantContext ?? "";
            frontmatter.Summary = note.Summary ?? "";
        }

        return new MeetingNote(artifacts.MeetingNotePath, frontmatter, await ReadUserNotes());
    }

    private async Task WriteMeetingNoteAsync(MeetingNote note)
    {
        Directory.CreateDirectory(Path.GetDirectoryName(artifacts.MeetingNotePath)!);
        await File.WriteAllTextAsync(
            artifacts.MeetingNotePath,
            RenderMeetingNote(note.Frontmatter, note.UserNotes));
    }

    private static string RenderMeetingNote(MeetingNoteFrontmatter frontmatter, string userNotes)
    {
        var lines = new List<string>
        {
            "---",
            $"title: {EscapeScalar(frontmatter.Title)}",
            $"start_time: {EscapeNullableDateTime(frontmatter.StartTime)}",
            $"end_time: {EscapeNullableDateTime(frontmatter.EndTime)}",
            "attendees:"
        };

        lines.AddRange(frontmatter.Attendees.Select(attendee => $"- {EscapeListItem(attendee)}"));
        lines.Add("projects:");
        lines.AddRange(frontmatter.Projects.Select(project => $"- {EscapeListItem(project)}"));
        lines.Add($"transcript: {EscapeQuoted(frontmatter.Transcript)}");
        lines.Add($"assistant_context: {EscapeQuoted(frontmatter.AssistantContext)}");
        lines.Add($"summary: {EscapeQuoted(frontmatter.Summary)}");
        lines.Add("---");
        lines.Add("");
        lines.Add(userNotes);
        return string.Join(Environment.NewLine, lines);
    }

    private static string EscapeScalar(string value)
    {
        return string.IsNullOrWhiteSpace(value) ? "\"\"" : EscapeListItem(value);
    }

    private static string EscapeQuoted(string value)
    {
        return $"\"{value.Replace("\"", "\\\"", StringComparison.Ordinal)}\"";
    }

    private static string EscapeNullableDateTime(DateTimeOffset? value)
    {
        return value is null ? "\"\"" : EscapeQuoted(value.Value.ToString("O"));
    }

    private static string EscapeListItem(string value)
    {
        if (string.IsNullOrWhiteSpace(value))
        {
            return "\"\"";
        }

        return value.Contains(':', StringComparison.Ordinal) || value.StartsWith("[", StringComparison.Ordinal)
            ? EscapeQuoted(value)
            : value;
    }

    private async Task<List<BoundMeetingProject>> GetSearchProjectsAsync(string[]? projects)
    {
        var boundProjects = await GetBoundProjectsAsync();
        if (projects is null || projects.Length == 0)
        {
            return boundProjects;
        }

        var requested = projects
            .Where(project => !string.IsNullOrWhiteSpace(project))
            .ToHashSet(StringComparer.OrdinalIgnoreCase);
        return boundProjects
            .Where(project => requested.Contains(project.Name))
            .ToList();
    }

    private async Task<BoundMeetingProject?> ResolveBoundProjectAsync(string project)
    {
        if (string.IsNullOrWhiteSpace(project))
        {
            return null;
        }

        return (await GetBoundProjectsAsync())
            .FirstOrDefault(candidate => string.Equals(candidate.Name, project, StringComparison.OrdinalIgnoreCase));
    }

    private async Task<string?> ResolveBoundProjectRootAsync(string project)
    {
        return (await ResolveBoundProjectAsync(project))?.Path;
    }

    private async Task<string?> ResolveBoundProjectFilePathAsync(string project, string path)
    {
        var projectRoot = await ResolveBoundProjectRootAsync(project);
        if (projectRoot is null || string.IsNullOrWhiteSpace(path) || Path.IsPathRooted(path))
        {
            return null;
        }

        var fullPath = Path.GetFullPath(Path.Combine(projectRoot, path));
        return IsWithinDirectory(projectRoot, fullPath) ? fullPath : null;
    }

    private ProjectFileTarget? ResolveExistingProjectFilePath(string project, string path)
    {
        if (string.IsNullOrWhiteSpace(project) ||
            string.IsNullOrWhiteSpace(path) ||
            Path.IsPathRooted(path))
        {
            return null;
        }

        var projectsRoot = GetProjectsRoot();
        if (!Directory.Exists(projectsRoot))
        {
            return null;
        }

        var projectFolder = Directory.EnumerateDirectories(projectsRoot)
            .Select(candidate => new BoundMeetingProject(Path.GetFileName(candidate), candidate))
            .FirstOrDefault(candidate => string.Equals(candidate.Name, project, StringComparison.OrdinalIgnoreCase));
        if (projectFolder is null)
        {
            return null;
        }

        var fullPath = Path.GetFullPath(Path.Combine(projectFolder.Path, path));
        return IsWithinDirectory(projectFolder.Path, fullPath)
            ? new ProjectFileTarget(projectFolder, fullPath)
            : null;
    }

    private static async Task WriteProjectFileContentAsync(
        string filePath,
        string content,
        FileLineEditMode editMode)
    {
        if (editMode.Kind == FileLineEditKind.Overwrite)
        {
            await File.WriteAllTextAsync(filePath, content);
            return;
        }

        var lines = File.Exists(filePath)
            ? (await File.ReadAllLinesAsync(filePath)).ToList()
            : [];
        var replacementLines = SplitLines(content);

        if (editMode.Kind == FileLineEditKind.Insert)
        {
            var insertIndex = Math.Clamp(editMode.Insert!.Value - 1, 0, lines.Count);
            lines.InsertRange(insertIndex, replacementLines);
            await File.WriteAllTextAsync(filePath, string.Join('\n', lines));
            return;
        }

        var startIndex = Math.Clamp(editMode.From!.Value - 1, 0, lines.Count);
        var endIndexExclusive = Math.Clamp(editMode.To!.Value, 0, lines.Count);
        if (endIndexExclusive < startIndex)
        {
            endIndexExclusive = startIndex;
        }

        lines.RemoveRange(startIndex, endIndexExclusive - startIndex);
        lines.InsertRange(startIndex, replacementLines);
        await File.WriteAllTextAsync(filePath, string.Join('\n', lines));
    }

    private static List<string> SplitLines(string content)
    {
        if (content.Length == 0)
        {
            return [];
        }

        return content
            .Replace("\r\n", "\n", StringComparison.Ordinal)
            .Replace('\r', '\n')
            .Split('\n')
            .ToList();
    }

    private static string ReadLines(string content, int? from = null, int? to = null)
    {
        if (!from.HasValue && !to.HasValue)
        {
            return content;
        }

        var lines = SplitLines(content);
        if (lines.Count == 0)
        {
            return "";
        }

        var start = Math.Clamp((from ?? 1) - 1, 0, lines.Count - 1);
        var end = Math.Clamp((to ?? lines.Count) - 1, 0, lines.Count - 1);
        if (end < start)
        {
            return "";
        }

        return string.Join('\n', lines.GetRange(start, end - start + 1));
    }

    private static string ApplyLineEdit(
        string existingContent,
        string replacementContent,
        FileLineEditMode editMode)
    {
        if (editMode.Kind == FileLineEditKind.Overwrite)
        {
            return replacementContent;
        }

        var lines = SplitLines(existingContent);
        var replacementLines = SplitLines(replacementContent);
        if (editMode.Kind == FileLineEditKind.Insert)
        {
            var insertIndex = Math.Clamp(editMode.Insert!.Value - 1, 0, lines.Count);
            lines.InsertRange(insertIndex, replacementLines);
            return string.Join('\n', lines);
        }

        var startIndex = Math.Clamp(editMode.From!.Value - 1, 0, lines.Count);
        var endIndexExclusive = Math.Clamp(editMode.To!.Value, 0, lines.Count);
        if (endIndexExclusive < startIndex)
        {
            endIndexExclusive = startIndex;
        }

        lines.RemoveRange(startIndex, endIndexExclusive - startIndex);
        lines.InsertRange(startIndex, replacementLines);
        return string.Join('\n', lines);
    }

    private Task<List<BoundMeetingProject>> GetBoundProjectsAsync()
    {
        return projectResolver.GetBoundProjectsAsync(artifacts);
    }

    private string GetProjectsRoot()
    {
        return projectResolver.ProjectsRoot;
    }

    private static async Task<string?> RunRipgrepAsync(
        string projectsRoot,
        IReadOnlyList<BoundMeetingProject> projects,
        string keywords)
    {
        try
        {
            var startInfo = new ProcessStartInfo
            {
                FileName = "rg",
                WorkingDirectory = projectsRoot,
                RedirectStandardOutput = true,
                RedirectStandardError = true,
                UseShellExecute = false
            };
            startInfo.ArgumentList.Add("--json");
            startInfo.ArgumentList.Add("--line-number");
            startInfo.ArgumentList.Add("--color");
            startInfo.ArgumentList.Add("never");
            startInfo.ArgumentList.Add("--");
            startInfo.ArgumentList.Add(keywords);
            foreach (var project in projects)
            {
                startInfo.ArgumentList.Add(project.Name);
            }

            using var process = Process.Start(startInfo);
            if (process is null)
            {
                return null;
            }

            var output = await process.StandardOutput.ReadToEndAsync();
            await process.WaitForExitAsync();
            return process.ExitCode is 0 or 1 ? output : null;
        }
        catch
        {
            return null;
        }
    }

    private static string FormatRipgrepJson(string output, bool singleProject)
    {
        var matches = new List<string>();
        using var reader = new StringReader(output);
        string? line;
        while ((line = reader.ReadLine()) is not null)
        {
            using var document = JsonDocument.Parse(line);
            var root = document.RootElement;
            if (!root.TryGetProperty("type", out var type) ||
                type.GetString() != "match" ||
                !root.TryGetProperty("data", out var data))
            {
                continue;
            }

            var path = data.GetProperty("path").GetProperty("text").GetString() ?? "";
            var lineNumber = data.GetProperty("line_number").GetInt32();
            var text = data.GetProperty("lines").GetProperty("text").GetString() ?? "";
            matches.Add($"{FormatSearchPath(path, singleProject)}:{lineNumber} {text.TrimEnd('\r', '\n')}");
        }

        return string.Join('\n', matches);
    }

    private static string SearchWithRegexFallback(IReadOnlyList<BoundMeetingProject> projects, string keywords, bool singleProject)
    {
        try
        {
            var regex = new System.Text.RegularExpressions.Regex(keywords);
            var matches = new List<string>();
            foreach (var project in projects)
            {
                foreach (var file in Directory.EnumerateFiles(project.Path, "*", SearchOption.AllDirectories))
                {
                    var lines = File.ReadAllLines(file);
                    for (var index = 0; index < lines.Length; index++)
                    {
                        if (regex.IsMatch(lines[index]))
                        {
                            var relative = Path.Combine(project.Name, Path.GetRelativePath(project.Path, file));
                            matches.Add($"{FormatSearchPath(relative, singleProject)}:{index + 1} {lines[index]}");
                        }
                    }
                }
            }

            return string.Join('\n', matches);
        }
        catch
        {
            return "";
        }
    }

    private static string FormatSearchPath(string path, bool singleProject)
    {
        var formatted = ToToolPath(path);
        if (!singleProject)
        {
            return formatted;
        }

        var slashIndex = formatted.IndexOf('/', StringComparison.Ordinal);
        return slashIndex < 0 ? formatted : formatted[(slashIndex + 1)..];
    }

    private static bool IsWithinDirectory(string directory, string path)
    {
        var normalizedDirectory = Path.GetFullPath(directory)
            .TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar) + Path.DirectorySeparatorChar;
        var normalizedPath = Path.GetFullPath(path);
        return normalizedPath.StartsWith(normalizedDirectory, StringComparison.OrdinalIgnoreCase);
    }

    private static string ToToolPath(string path)
    {
        return path.Replace(Path.DirectorySeparatorChar.ToString(), "/", StringComparison.Ordinal)
            .Replace(Path.AltDirectorySeparatorChar.ToString(), "/", StringComparison.Ordinal);
    }

    private sealed record ProjectFileTarget(BoundMeetingProject Project, string Path);

    private sealed record FileLineEditMode(
        FileLineEditKind Kind,
        int? From = null,
        int? To = null,
        int? Insert = null)
    {
        public static FileLineEditMode? Create(int? from, int? to, int? insert)
        {
            if (insert.HasValue)
            {
                return from.HasValue || to.HasValue
                    ? null
                    : new FileLineEditMode(FileLineEditKind.Insert, Insert: insert);
            }

            if (from.HasValue || to.HasValue)
            {
                return from.HasValue && to.HasValue && from.Value <= to.Value
                    ? new FileLineEditMode(FileLineEditKind.Replace, From: from, To: to)
                    : null;
            }

            return new FileLineEditMode(FileLineEditKind.Overwrite);
        }
    }

    private enum FileLineEditKind
    {
        Overwrite,
        Replace,
        Insert
    }

    private sealed class MeetingNoteFrontmatterYaml
    {
        [YamlDotNet.Serialization.YamlMember(Alias = "title")]
        public string? Title { get; set; }

        [YamlDotNet.Serialization.YamlMember(Alias = "start_time")]
        public string? StartTime { get; set; }

        [YamlDotNet.Serialization.YamlMember(Alias = "end_time")]
        public string? EndTime { get; set; }

        [YamlDotNet.Serialization.YamlMember(Alias = "attendees")]
        public List<string>? Attendees { get; set; }

        [YamlDotNet.Serialization.YamlMember(Alias = "projects")]
        public List<string>? Projects { get; set; }

        [YamlDotNet.Serialization.YamlMember(Alias = "transcript")]
        public string? Transcript { get; set; }

        [YamlDotNet.Serialization.YamlMember(Alias = "assistant_context")]
        public string? AssistantContext { get; set; }

        [YamlDotNet.Serialization.YamlMember(Alias = "summary")]
        public string? Summary { get; set; }
    }

    private static DateTimeOffset? ParseDateTime(string? value)
    {
        return DateTimeOffset.TryParse(value, out var parsed)
            ? parsed
            : null;
    }
}