<?php

namespace App\Http\Controllers;

use App\Models\HealthCheck;
use App\Models\Site;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\View\View;

class HealthCheckController extends Controller
{
    /**
     * Display overview of all health checks across all sites
     */
    public function overview(): View
    {
        $sites = Site::where('user_id', Auth::id())
            ->withCount('healthChecks')
            ->with(['healthChecks' => function ($query) {
                $query->where('is_active', true)->limit(5);
            }])
            ->get();

        $stats = [
            'total_sites' => $sites->count(),
            'total_health_checks' => $sites->sum('health_checks_count'),
            'sites_with_checks' => $sites->where('health_checks_count', '>', 0)->count(),
        ];

        return view('health-checks.overview', compact('sites', 'stats'));
    }

    /**
     * Display a listing of the health checks for a site.
     */
    public function index(Site $site): View
    {
        // Ensure the user owns the site
        if ($site->user_id !== Auth::id()) {
            abort(403, 'Unauthorized access to this site.');
        }

        $healthChecks = $site->healthChecks()
            ->orderBy('created_at', 'desc')
            ->get();

        return view('health-checks.index', compact('site', 'healthChecks'));
    }

    /**
     * Show the form for creating a new health check.
     */
    public function create(Site $site): View
    {
        // Ensure the user owns the site
        if ($site->user_id !== Auth::id()) {
            abort(403, 'Unauthorized access to this site.');
        }

        return view('health-checks.create', compact('site'));
    }

    /**
     * Store a newly created health check in storage.
     */
    public function store(Request $request, Site $site): RedirectResponse
    {
        // Ensure the user owns the site
        if ($site->user_id !== Auth::id()) {
            abort(403, 'Unauthorized access to this site.');
        }

        $validated = $request->validate([
            'endpoint' => ['required', 'string', 'max:255'],
            'expected_json_keys' => ['nullable', 'string'],
            'performance_threshold' => ['nullable', 'integer', 'min:1', 'max:60000'],
            'is_active' => ['boolean'],
        ]);

        // Convert comma-separated keys to array
        $expectedKeys = null;
        if (!empty($validated['expected_json_keys'])) {
            $expectedKeys = array_map(
                'trim',
                explode(',', $validated['expected_json_keys'])
            );
        }

        // Check for duplicate endpoint
        $exists = $site->healthChecks()
            ->where('endpoint', $validated['endpoint'])
            ->exists();

        if ($exists) {
            return back()
                ->withInput()
                ->withErrors(['endpoint' => 'This endpoint is already being monitored for this site.']);
        }

        $healthCheck = $site->healthChecks()->create([
            'endpoint' => $validated['endpoint'],
            'expected_json_keys' => $expectedKeys,
            'performance_threshold' => $validated['performance_threshold'] ?? null,
            'is_active' => $validated['is_active'] ?? true,
        ]);

        return redirect()
            ->route('health-checks.show', [$site, $healthCheck])
            ->with('success', 'Health check created successfully.');
    }

    /**
     * Display the specified health check.
     */
    public function show(Site $site, HealthCheck $healthCheck): View
    {
        // Ensure the user owns the site and the health check belongs to the site
        if ($site->user_id !== Auth::id() || $healthCheck->site_id !== $site->id) {
            abort(403, 'Unauthorized access to this health check.');
        }

        return view('health-checks.show', compact('site', 'healthCheck'));
    }

    /**
     * Show the form for editing the specified health check.
     */
    public function edit(Site $site, HealthCheck $healthCheck): View
    {
        // Ensure the user owns the site and the health check belongs to the site
        if ($site->user_id !== Auth::id() || $healthCheck->site_id !== $site->id) {
            abort(403, 'Unauthorized access to this health check.');
        }

        return view('health-checks.edit', compact('site', 'healthCheck'));
    }

    /**
     * Update the specified health check in storage.
     */
    public function update(Request $request, Site $site, HealthCheck $healthCheck): RedirectResponse
    {
        // Ensure the user owns the site and the health check belongs to the site
        if ($site->user_id !== Auth::id() || $healthCheck->site_id !== $site->id) {
            abort(403, 'Unauthorized access to this health check.');
        }

        $validated = $request->validate([
            'endpoint' => ['required', 'string', 'max:255'],
            'expected_json_keys' => ['nullable', 'string'],
            'performance_threshold' => ['nullable', 'integer', 'min:1', 'max:60000'],
            'is_active' => ['boolean'],
        ]);

        // Convert comma-separated keys to array
        $expectedKeys = null;
        if (!empty($validated['expected_json_keys'])) {
            $expectedKeys = array_map(
                'trim',
                explode(',', $validated['expected_json_keys'])
            );
        }

        // Check for duplicate endpoint (excluding current health check)
        $exists = $site->healthChecks()
            ->where('endpoint', $validated['endpoint'])
            ->where('id', '!=', $healthCheck->id)
            ->exists();

        if ($exists) {
            return back()
                ->withInput()
                ->withErrors(['endpoint' => 'This endpoint is already being monitored for this site.']);
        }

        $healthCheck->update([
            'endpoint' => $validated['endpoint'],
            'expected_json_keys' => $expectedKeys,
            'performance_threshold' => $validated['performance_threshold'] ?? null,
            'is_active' => $validated['is_active'] ?? $healthCheck->is_active,
        ]);

        return redirect()
            ->route('health-checks.show', [$site, $healthCheck])
            ->with('success', 'Health check updated successfully.');
    }

    /**
     * Remove the specified health check from storage.
     */
    public function destroy(Site $site, HealthCheck $healthCheck): RedirectResponse
    {
        // Ensure the user owns the site and the health check belongs to the site
        if ($site->user_id !== Auth::id() || $healthCheck->site_id !== $site->id) {
            abort(403, 'Unauthorized access to this health check.');
        }

        $healthCheck->delete();

        return redirect()
            ->route('health-checks.index', $site)
            ->with('success', 'Health check deleted successfully.');
    }
}