import type { ConvoyClassification } from "../convoy-lifecycle/schemas";

export type CompletionSummaryInput = {
  slug: string;
  classification: ConvoyClassification;
  successMetric: string;
  briefs: Array<{ title: string; status: string | null }>;
  modelAlias?: string | null;
  harnessAlias?: string | null;
  prUrl?: string | null;
};

export function generateCompletionSummary(input: CompletionSummaryInput): string {
  const briefCount = input.briefs.length;
  const briefTitles =
    briefCount === 0
      ? "No briefs"
      : input.briefs.map((b) => `${b.title} (${b.status ?? "—"})`).join(", ");

  const modelLine = input.modelAlias ? `Model: ${input.modelAlias}` : "Model: n/a";
  const harnessLine = input.harnessAlias ? `Harness: ${input.harnessAlias}` : "Harness: n/a";
  const prLine = input.prUrl ? `PR: ${input.prUrl}` : "PR: n/a";

  const lines: string[] = [
    "## Summary",
    `Convoy ${input.slug} ${input.classification} — ${input.successMetric}`,
    `Briefs: ${briefCount} — ${briefTitles}`,
    modelLine,
    harnessLine,
    prLine,
  ];

  return lines.join("\n");
}