<?php

namespace App\Http\Controllers;

use App\Models\Alert;
use App\Models\Website;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class AlertController extends Controller
{
    public function index(Website $website): View
    {
        $this->authorize('view', $website);

        $alerts = $website->alerts()->orderBy('name')->get();
        $unreadCount = $website->alerts()
            ->whereHas('notifications', fn ($q) => $q->where('is_read', false))
            ->count();

        return view('alerts.index', [
            'website' => $website,
            'alerts' => $alerts,
            'unreadCount' => $unreadCount,
        ]);
    }

    public function create(Website $website): View
    {
        $this->authorize('view', $website);

        return view('alerts.create', ['website' => $website]);
    }

    public function store(Request $request, Website $website): RedirectResponse
    {
        $this->authorize('view', $website);

        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'metric' => 'required|in:' . implode(',', array_keys(Alert::$metrics)),
            'condition' => 'required|in:' . implode(',', array_keys(Alert::$conditions)),
            'threshold' => 'required|numeric|min:0',
            'period' => 'required|in:daily,hourly',
            'channel' => 'required|in:email,in_app,both',
        ]);

        $website->alerts()->create($validated);

        return redirect()
            ->route('alerts.index', $website)
            ->with('success', 'Alert created successfully.');
    }

    public function edit(Website $website, Alert $alert): View
    {
        $this->authorize('view', $website);

        return view('alerts.edit', [
            'website' => $website,
            'alert' => $alert,
        ]);
    }

    public function update(Request $request, Website $website, Alert $alert): RedirectResponse
    {
        $this->authorize('view', $website);

        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'metric' => 'required|in:' . implode(',', array_keys(Alert::$metrics)),
            'condition' => 'required|in:' . implode(',', array_keys(Alert::$conditions)),
            'threshold' => 'required|numeric|min:0',
            'period' => 'required|in:daily,hourly',
            'channel' => 'required|in:email,in_app,both',
        ]);

        $alert->update($validated);

        return redirect()
            ->route('alerts.index', $website)
            ->with('success', 'Alert updated successfully.');
    }

    public function destroy(Website $website, Alert $alert): RedirectResponse
    {
        $this->authorize('view', $website);

        $alert->delete();

        return redirect()
            ->route('alerts.index', $website)
            ->with('success', 'Alert deleted.');
    }

    public function notifications(Website $website): View
    {
        $this->authorize('view', $website);

        $notifications = \App\Models\AlertNotification::whereHas('alert', fn ($q) => $q->where('website_id', $website->id))
            ->with('alert')
            ->orderByDesc('created_at')
            ->paginate(20);

        // Mark as read
        \App\Models\AlertNotification::whereHas('alert', fn ($q) => $q->where('website_id', $website->id))
            ->where('is_read', false)
            ->update(['is_read' => true]);

        return view('alerts.notifications', [
            'website' => $website,
            'notifications' => $notifications,
        ]);
    }
}