import type { FastifyInstance, FastifyReply } from 'fastify';
import type { CreateRepoRequest, DiscoverReposResponse, RepoResponse, ReposListResponse, UpdateRepoRequest } from '@arboretum/shared';
import type { WorktreeManager } from '../core/worktree-manager.js';
import type { Db } from '../db/index.js';
import { readScanRoots } from '../core/scan-settings.js';

/** Mappe une erreur du manager (statusCode + code) vers une réponse REST normalisée. */
export function sendManagerError(reply: FastifyReply, err: unknown): FastifyReply {
  const e = err as { statusCode?: number; code?: string; message?: string };
  return reply.status(e.statusCode ?? 500).send({ error: { code: e.code ?? 'INTERNAL', message: e.message ?? 'Internal error' } });
}

export function registerRepoRoutes(app: FastifyInstance, wt: WorktreeManager, db: Db): void {
  app.get('/api/v1/repos', async (): Promise<ReposListResponse> => ({ repos: await wt.listRepos() }));

  // Scan manuel : découvre et auto-enregistre les repos sous les racines configurées (settings).
  app.post('/api/v1/repos/discover', async (_req, reply) => {
    try {
      const res: DiscoverReposResponse = await wt.discoverRepos({ roots: readScanRoots(db) });
      return reply.send(res);
    } catch (err) {
      return sendManagerError(reply, err);
    }
  });

  app.post('/api/v1/repos', async (req, reply) => {
    const body = req.body as Partial<CreateRepoRequest> | null;
    if (!body || typeof body.path !== 'string') {
      return reply.status(400).send({ error: { code: 'BAD_REQUEST', message: 'path (absolute) is required' } });
    }
    try {
      const repo = await wt.addRepo({
        path: body.path,
        ...(body.label !== undefined ? { label: body.label } : {}),
        ...(body.postCreateHooks !== undefined ? { postCreateHooks: body.postCreateHooks } : {}),
        ...(body.preTrust !== undefined ? { preTrust: body.preTrust } : {}),
      });
      const res: RepoResponse = { repo };
      return reply.status(201).send(res);
    } catch (err) {
      return sendManagerError(reply, err);
    }
  });

  app.patch('/api/v1/repos/:id', async (req, reply) => {
    const { id } = req.params as { id: string };
    const body = (req.body as Partial<UpdateRepoRequest> | null) ?? {};
    try {
      const repo = await wt.updateRepo(id, {
        ...(body.label !== undefined ? { label: body.label } : {}),
        ...(body.postCreateHooks !== undefined ? { postCreateHooks: body.postCreateHooks } : {}),
        ...(body.preTrust !== undefined ? { preTrust: body.preTrust } : {}),
        ...(typeof body.hidden === 'boolean' ? { hidden: body.hidden } : {}),
      });
      const res: RepoResponse = { repo };
      return reply.send(res);
    } catch (err) {
      return sendManagerError(reply, err);
    }
  });

  app.delete('/api/v1/repos/:id', async (req, reply) => {
    const { id } = req.params as { id: string };
    if (!wt.removeRepo(id)) {
      return reply.status(404).send({ error: { code: 'NOT_FOUND', message: 'No repo with this id' } });
    }
    return reply.send({ ok: true });
  });
}