<?php

namespace App\Http\Controllers;

use App\Models\Task;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class TaskController extends Controller
{
    /** UI web (lista + formulario). */
    public function index(): View
    {
        $tasks = Task::orderBy('done')
                     ->orderByRaw("FIELD(priority,'high','med','low')")
                     ->orderBy('created_at')
                     ->get();
        return view('tasks.index', compact('tasks'));
    }

    /** GET /api/tasks/pending  -> JSON para el ESP32 */
    public function pending(): JsonResponse
    {
        $tasks = Task::active()
                     ->orderByRaw("FIELD(priority,'high','med','low')")
                     ->orderBy('created_at')
                     ->limit(20)
                     ->get();

        return response()->json($tasks->map(fn ($t) => [
            'id'           => $t->id,
            'title'        => $t->title,
            'priority'     => $t->priority,
            'next_due_in'  => $t->next_due_in,
        ]));
    }

    /** POST /api/tasks  -> crear (también desde la web) */
    public function store(Request $request): JsonResponse|\Illuminate\Http\RedirectResponse
    {
        $data = $request->validate([
            'title'    => 'required|string|max:120',
            'priority' => 'nullable|in:low,med,high',
        ]);

        $task = Task::create([
            'title'    => $data['title'],
            'priority' => $data['priority'] ?? 'med',
        ]);

        if ($request->wantsJson()) {
            return response()->json($task, 201);
        }
        return redirect()->route('tasks.index');
    }

    /** POST /api/tasks/{task}/done  -> marcar como hecha */
    public function done(Task $task): JsonResponse
    {
        $task->update([
            'done'    => true,
            'done_at' => now(),
        ]);
        return response()->json(['ok' => true, 'id' => $task->id]);
    }

    /** POST /api/tasks/{task}/snooze  -> posponer X minutos */
    public function snooze(Request $request, Task $task): JsonResponse
    {
        $minutes = (int) $request->input('minutes', 5);
        $minutes = max(1, min(120, $minutes));

        $task->update([
            'snooze_until' => now()->addMinutes($minutes),
        ]);
        return response()->json(['ok' => true, 'id' => $task->id, 'minutes' => $minutes]);
    }

    /** DELETE /api/tasks/{task}  -> borrar */
    public function destroy(Task $task): JsonResponse|\Illuminate\Http\RedirectResponse
    {
        $task->delete();
        if (request()->wantsJson()) {
            return response()->json(['ok' => true]);
        }
        return redirect()->route('tasks.index');
    }

    /** POST /tasks/{task}/restore  -> reabrir */
    public function restore(Task $task): \Illuminate\Http\RedirectResponse
    {
        $task->update(['done' => false, 'done_at' => null, 'snooze_until' => null]);
        return redirect()->route('tasks.index');
    }
}