namespace AxCopilot.Services.Agent;

public static class ArtifactRepairGuideService
{
    public static string BuildGuide(ArtifactQualityReport review)
    {
        if (review.Issues.Count == 0)
            return "Repair guide: none";

        var actions = new List<string>();

        foreach (var issue in review.Issues)
        {
            var action = review.ArtifactType switch
            {
                "html" => BuildHtmlAction(issue.Message),
                "xlsx" => BuildWorkbookAction(issue.Message),
                "docx" => BuildDocumentAction(issue.Message),
                _ => null
            };

            if (!string.IsNullOrWhiteSpace(action) && !actions.Contains(action, StringComparer.OrdinalIgnoreCase))
                actions.Add(action);

            if (actions.Count >= 3)
                break;
        }

        if (actions.Count == 0)
            return "Repair guide: review low-signal issues and tighten structure before export";

        return "Repair guide: " + string.Join(" | ", actions);
    }

    private static string? BuildHtmlAction(string message)
    {
        if (message.Contains("decision summary or evidence cards", StringComparison.OrdinalIgnoreCase))
            return "Add a decision summary and evidence cards near the recommendation section";
        if (message.Contains("cover page", StringComparison.OrdinalIgnoreCase))
            return "Add a cover page for print-ready or board-facing reports";
        if (message.Contains("table of contents", StringComparison.OrdinalIgnoreCase))
            return "Add a table of contents for longer print-ready reports";
        if (message.Contains("comparison or roadmap", StringComparison.OrdinalIgnoreCase))
            return "Add comparison or roadmap blocks to make options and sequencing explicit";
        if (message.Contains("supporting paragraphs", StringComparison.OrdinalIgnoreCase))
            return "Expand the core sections with supporting paragraphs and business evidence";
        if (message.Contains("Structured visual blocks are limited", StringComparison.OrdinalIgnoreCase))
            return "Use comparison, roadmap, matrix, KPI, or evidence blocks instead of plain text only";
        if (message.Contains("Executive summary", StringComparison.OrdinalIgnoreCase))
            return "Add an Executive Summary section near the top of the report";
        return null;
    }

    private static string? BuildWorkbookAction(string message)
    {
        if (message.Contains("Dashboard sheet lacks KPI, trend, or decision content", StringComparison.OrdinalIgnoreCase))
            return "Add KPI, trend, or decision blocks so the dashboard communicates the core story at a glance";
        if (message.Contains("dashboard sheet", StringComparison.OrdinalIgnoreCase))
            return "Add a dashboard sheet with KPI tiles, trends, and links to detail sheets";
        if (message.Contains("Summary sheet could better surface", StringComparison.OrdinalIgnoreCase))
            return "Promote KPIs, decisions, and highlights into the summary or dashboard sheet";
        if (message.Contains("Dashboard sheet could better call out highlights or actions", StringComparison.OrdinalIgnoreCase))
            return "Add highlight and action callout blocks to the dashboard sheet";
        if (message.Contains("Dashboard sheet should link", StringComparison.OrdinalIgnoreCase))
            return "Add hyperlinks from the dashboard to each supporting detail sheet";
        if (message.Contains("trend or variance formulas", StringComparison.OrdinalIgnoreCase))
            return "Add trend, variance, or rollup formulas so the dashboard summarizes detail sheets";
        if (message.Contains("data validation", StringComparison.OrdinalIgnoreCase))
            return "Add data validation rules for editable status, owner, or category columns";
        if (message.Contains("Conditional formatting", StringComparison.OrdinalIgnoreCase))
            return "Add conditional formatting to flag priority items, variances, or risks";
        if (message.Contains("more formulas or rollups", StringComparison.OrdinalIgnoreCase))
            return "Add rollup formulas or summary calculations to turn detail data into insights";
        if (message.Contains("Summary sheet does not link", StringComparison.OrdinalIgnoreCase))
            return "Link the summary/dashboard sheet to each detail sheet for faster navigation";
        return null;
    }

    private static string? BuildDocumentAction(string message)
    {
        if (message.Contains("cover page", StringComparison.OrdinalIgnoreCase))
            return "Add a cover page with subtitle, owner, and review context for the document";
        if (message.Contains("table of contents", StringComparison.OrdinalIgnoreCase))
            return "Add a table of contents so longer readers can navigate the document quickly";
        if (message.Contains("Template-based styling", StringComparison.OrdinalIgnoreCase))
            return "Apply a document template or style map to keep headings and body copy consistent";
        if (message.Contains("Header or footer", StringComparison.OrdinalIgnoreCase))
            return "Add header and footer metadata such as document name, confidentiality, or page numbers";
        if (message.Contains("Executive Summary", StringComparison.OrdinalIgnoreCase))
            return "Add an Executive Summary section at the start of the document";
        if (message.Contains("Recommendation", StringComparison.OrdinalIgnoreCase))
            return "Add a recommendation or next-step section with a clear decision ask";
        if (message.Contains("Appendix", StringComparison.OrdinalIgnoreCase))
            return "Add an appendix or reference section for longer documents";
        if (message.Contains("mostly plain paragraphs", StringComparison.OrdinalIgnoreCase))
            return "Introduce tables, lists, or callout blocks to break up dense prose";
        if (message.Contains("too short", StringComparison.OrdinalIgnoreCase))
            return "Deepen the supporting analysis before export";
        return null;
    }
}