/**
 * Session-delete work-loss guard (coder side).
 *
 * Session delete itself lives in apps/server (Docker), which CANNOT see the
 * host worktree dirs (/tmp/booworktrees) or run git on them. Only BooCoder
 * (host systemd) can. So the server's DELETE route calls these endpoints
 * pre-delete to learn whether a session's worktree holds work at risk, and to
 * stash it. The server owns the gate; coder owns the git truth.
 */
import type { FastifyInstance } from 'fastify';
import type { Sql } from '../db.js';
import { checkWorktreeWorkAtRisk, stashWorktree } from '../services/worktrees.js';

export function registerWorktreeSafetyRoutes(app: FastifyInstance, sql: Sql): void {
  // GET risk for a session's worktree(s). One row per session today (PK on
  // session_id); the loop already handles the Phase-1.5 multi-worktree case.
  app.get<{ Params: { sessionId: string } }>(
    '/api/sessions/:sessionId/worktree-risk',
    async (req) => {
      const rows = await sql<{ worktree_path: string }[]>`
        SELECT path AS worktree_path FROM worktrees WHERE session_id = ${req.params.sessionId}
      `;
      const reports = [];
      for (const row of rows) {
        reports.push(await checkWorktreeWorkAtRisk(row.worktree_path));
      }
      return { reports };
    },
  );

  // Stash a session's worktree(s) — clears the dirty risk; recoverable.
  app.post<{ Params: { sessionId: string } }>(
    '/api/sessions/:sessionId/worktree-stash',
    async (req) => {
      const rows = await sql<{ worktree_path: string }[]>`
        SELECT path AS worktree_path FROM worktrees WHERE session_id = ${req.params.sessionId}
      `;
      const results = [];
      for (const row of rows) {
        results.push({ worktreePath: row.worktree_path, ...(await stashWorktree(row.worktree_path)) });
      }
      return { results };
    },
  );
}