#!/usr/bin/env node
// Regenerates BOARD.md (human kanban) from board.json (source of truth).
// No deps. Run: node warroom/build-board.mjs
import { readFileSync, writeFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';

const DIR = dirname(fileURLToPath(import.meta.url));
const board = JSON.parse(readFileSync(join(DIR, 'board.json'), 'utf8'));

const STATUSES = ['backlog', 'todo', 'in_progress', 'review', 'done'];
const PRIO = ['P0', 'P1', 'P2', 'P3'];
const tickets = board.tickets ?? [];

const byPrio = (a, b) => PRIO.indexOf(a.priority) - PRIO.indexOf(b.priority);
const count = (pred) => tickets.filter(pred).length;

let md = `# 🏢 War Room Board\n\n`;
md += `_Generated from board.json — do not edit by hand. ${tickets.length} tickets._\n\n`;

// Launch readiness
if (board.readiness) {
  const r = board.readiness;
  md += `## 🚦 Launch readiness: ${r.verdict} (${r.score}/100)\n\n> ${r.summary}\n\n`;
}

// P0 blockers
if (board.blockers?.length) {
  md += `## 🚨 P0 Blockers\n\n${board.blockers.map((b) => `- ${b}`).join('\n')}\n\n`;
}

// Critical path
if (board.criticalPath?.length) {
  md += `## 🧭 Critical path to launch\n\n${board.criticalPath
    .map((s, i) => `${i + 1}. ${String(s).replace(/^\s*\d+\.\s*/, '')}`)
    .join('\n')}\n\n`;
}

// Sprint 0
if (board.sprint0?.length) {
  md += `## ⚡ Sprint 0 (do first)\n\n${board.sprint0.map((s) => `- [ ] ${s}`).join('\n')}\n\n`;
}

// Summary counts
md += `## 📊 Summary\n\n`;
md += `| Priority | Count | | Status | Count |\n|---|---|---|---|---|\n`;
for (let i = 0; i < Math.max(PRIO.length, STATUSES.length); i++) {
  const p = PRIO[i] ? `${PRIO[i]} | ${count((t) => t.priority === PRIO[i])}` : ' | ';
  const s = STATUSES[i] ? `${STATUSES[i]} | ${count((t) => t.status === STATUSES[i])}` : ' | ';
  md += `| ${p} | | ${s} |\n`;
}
md += `\n`;

// Tickets grouped by role
const roles = [...new Set(tickets.map((t) => t.role))];
for (const role of roles) {
  const rt = tickets.filter((t) => t.role === role).sort(byPrio);
  const team = board.org?.find((o) => o.role === role)?.team ?? '';
  md += `## ${role}${team ? ` — ${team}` : ''} (${rt.length})\n\n`;
  md += `| ID | P | Effort | Status | Title | Deps |\n|---|---|---|---|---|---|\n`;
  for (const t of rt) {
    md += `| ${t.id} | ${t.priority} | ${t.effort ?? '-'} | ${t.status ?? 'backlog'} | ${t.title} | ${(t.deps ?? []).join(', ') || '-'} |\n`;
  }
  md += `\n`;
}

writeFileSync(join(DIR, 'BOARD.md'), md);
console.log(`BOARD.md regenerated — ${tickets.length} tickets across ${roles.length} roles.`);