/**
 * WorthDoing.ai
 * Author: Simon-Pierre Boucher
 * Contact: contact@spboucher.ai
 * File: src/app/api/investigations/[id]/route.ts
 * Description: Investigation detail — state snapshot for the live UI (hypotheses, opportunities, budget, phase).
 */
import { NextRequest, NextResponse } from "next/server";
import { z } from "zod";
import { loadState } from "@/lib/agent/state";
import { resumeInvestigation, isRunning } from "@/lib/agent/runner";

export const dynamic = "force-dynamic";

export async function GET(_req: NextRequest, ctx: { params: Promise<{ id: string }> }) {
  const { id } = await ctx.params;
  if (!z.string().uuid().safeParse(id).success) {
    return NextResponse.json({ error: "Invalid investigation id." }, { status: 400 });
  }
  try {
    const state = await loadState(id);
    // Self-heal: a "running" investigation with no live engine (server restarted) gets resumed.
    if (state.investigation.status === "running" && !isRunning(id)) {
      void resumeInvestigation(id);
    }
    const inv = state.investigation;
    return NextResponse.json({
      investigation: {
        id: inv.id,
        objective: inv.objective,
        status: inv.status,
        phase: inv.phase,
        stopReason: inv.stopReason,
        outcome: inv.outcome,
        conclusion: inv.conclusion,
        budget: inv.budget,
        budgetUsed: inv.budgetUsed,
        model: inv.model,
        createdAt: inv.createdAt,
        startedAt: inv.startedAt,
        completedAt: inv.completedAt,
        error: inv.error,
      },
      hypotheses: state.hypotheses,
      opportunities: state.opportunities.map((o) => ({
        id: o.id,
        title: o.title,
        summary: o.summary,
        status: o.status,
        worthScore: o.worthScore,
        evidenceConfidence: o.evidenceConfidence,
        hasReport: !!o.reportMd,
      })),
      evidenceCount: state.evidence.length,
      searchCount: state.searches.length,
      sources: state.visitedSources,
    });
  } catch {
    return NextResponse.json({ error: "Investigation not found." }, { status: 404 });
  }
}