import { pool } from '../pool.js';
import { recordAudit } from './audit_stub.js';

export async function create({ space_id, project_id = null, title, body, priority, due_at, position }, actor) {
  const { rows: [r] } = await pool.query(
    `INSERT INTO tasks(space_id, project_id, title, body, priority, due_at, position)
     VALUES($1,$2,$3,$4,$5,$6,$7) RETURNING *`,
    [space_id, project_id, title, body || null, priority || null, due_at || null, position || null]
  );
  await recordAudit(actor, 'create', 'task', r.id, null, r);
  return r;
}

export async function getById(id) {
  const { rows: [r] } = await pool.query(`SELECT * FROM tasks WHERE id=$1`, [id]);
  return r;
}

export async function listByProject(project_id) {
  const { rows } = await pool.query(
    `SELECT * FROM tasks WHERE project_id=$1 ORDER BY position NULLS LAST, created_at`,
    [project_id]
  );
  return rows;
}

export async function listBySpace(space_id, { status } = {}) {
  const sql = status
    ? `SELECT * FROM tasks WHERE space_id=$1 AND status=$2 ORDER BY created_at`
    : `SELECT * FROM tasks WHERE space_id=$1 ORDER BY created_at`;
  const { rows } = await pool.query(sql, status ? [space_id, status] : [space_id]);
  return rows;
}

export async function update(id, patch, actor) {
  const before = await getById(id);
  const fields = ['title','body','status','priority','due_at','position','project_id'];
  const sets = [], vals = [];
  let i = 1;
  for (const f of fields) {
    if (patch[f] !== undefined) { sets.push(`${f}=$${i++}`); vals.push(patch[f]); }
  }
  if (patch.status === 'done') { sets.push(`completed_at=now()`); }
  sets.push(`updated_at=now()`);
  vals.push(id);
  const { rows: [r] } = await pool.query(
    `UPDATE tasks SET ${sets.join(', ')} WHERE id=$${i} RETURNING *`,
    vals
  );
  await recordAudit(actor, 'update', 'task', id, before, r);
  return r;
}

export async function del(id, actor) {
  const before = await getById(id);
  await pool.query(`DELETE FROM tasks WHERE id=$1`, [id]);
  await recordAudit(actor, 'delete', 'task', id, before, null);
}