<?php

namespace App\Http\Controllers;

use App\Models\BuyerProfile;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class BuyerProfileController extends Controller
{
    public function index(Request $request): View
    {
        $profiles = BuyerProfile::with('user', 'attachments', 'ratings.user')
            ->withAvg(['ratings as average_stars' => fn ($query) => $query->whereNotNull('stars')], 'stars')
            ->withCount('ratings');

        if ($search = $request->string('q')->toString()) {
            $profiles->where(fn ($query) => $query
                ->where('company_name', 'like', "%{$search}%")
                ->orWhere('headline', 'like', "%{$search}%")
                ->orWhere('service_categories', 'like', "%{$search}%")
                ->orWhere('hiring_regions', 'like', "%{$search}%")
            );
        }

        if ($category = $request->string('category')->toString()) {
            $profiles->where('service_categories', 'like', "%{$category}%");
        }

        if ($region = $request->string('region')->toString()) {
            $profiles->where('hiring_regions', 'like', "%{$region}%");
        }

        if ($payment = $request->string('payment')->toString()) {
            $profiles->where('payment_terms', 'like', "%{$payment}%");
        }

        if ($request->boolean('public_contact')) {
            $profiles->where('public_contact', true);
        }

        match ($request->string('sort')->toString()) {
            'name' => $profiles->orderBy('company_name'),
            'rating' => $profiles->orderByDesc('average_stars')->orderByDesc('ratings_count'),
            default => $profiles->latest(),
        };

        return view('buyers.index', [
            'profiles' => $profiles->paginate(20)->withQueryString(),
            'filters' => $request->only(['q', 'category', 'region', 'payment', 'public_contact', 'sort']),
        ]);
    }

    public function edit(Request $request): View
    {
        abort_unless($request->user()->hasRole('buyer'), 403);

        return view('buyers.edit', [
            'profile' => $request->user()->buyerProfile?->load('attachments'),
        ]);
    }

    public function update(Request $request): RedirectResponse
    {
        abort_unless($request->user()->hasRole('buyer'), 403);

        $data = $request->validate([
            'company_name' => ['required', 'string', 'max:255'],
            'headline' => ['nullable', 'string', 'max:255'],
            'description' => ['nullable', 'string'],
            'service_categories' => ['nullable', 'string'],
            'hiring_regions' => ['nullable', 'string'],
            'hiring_policies_text' => ['nullable', 'string'],
            'locations_text' => ['nullable', 'string'],
            'vendor_onboarding' => ['nullable', 'string'],
            'payment_terms' => ['nullable', 'string'],
            'website_url' => ['nullable', 'url', 'max:255'],
            'contact_email' => ['nullable', 'email', 'max:255'],
            'public_contact' => ['nullable', 'boolean'],
            'profile_visibility' => ['nullable', 'array'],
            'profile_visibility.*' => ['nullable', 'boolean'],
            'private_notes' => ['nullable', 'string'],
        ]);

        $data['public_contact'] = $request->boolean('public_contact');
        $data['hiring_policies'] = $this->linesToRecords($data['hiring_policies_text'] ?? '', ['name', 'summary']);
        $data['locations'] = $this->linesToRecords($data['locations_text'] ?? '', ['name', 'region']);
        $data['profile_visibility'] = $this->normalizeVisibility($request, [
            'description', 'categories', 'locations', 'policies', 'payment_terms', 'onboarding',
        ]);
        unset($data['hiring_policies_text'], $data['locations_text']);

        $request->user()->buyerProfile()->updateOrCreate(
            ['user_id' => $request->user()->id],
            $data
        );

        return redirect()->route('buyers.edit')->with('status', 'Buyer profile saved.');
    }

    public function show(BuyerProfile $buyer): View
    {
        return view('buyers.show', [
            'profile' => $buyer->load('user', 'attachments', 'ratings.user'),
        ]);
    }

    private function linesToRecords(string $text, array $keys): array
    {
        return collect(preg_split('/\r\n|\r|\n/', $text))
            ->map(fn (string $line): array => array_pad(array_map('trim', explode('|', $line, count($keys))), count($keys), null))
            ->filter(fn (array $parts): bool => (bool) ($parts[0] ?? null))
            ->map(fn (array $parts): array => collect($keys)->mapWithKeys(fn (string $key, int $index): array => [$key => $parts[$index] ?? null])->all())
            ->values()
            ->all();
    }

    private function normalizeVisibility(Request $request, array $fields): array
    {
        return collect($fields)
            ->mapWithKeys(fn (string $field): array => [$field => $request->boolean("profile_visibility.$field")])
            ->all();
    }
}