<?php

namespace App\Http\Controllers;

use App\Models\LdapGroupMeta;
use App\Services\LdapGroupService;
use App\Services\LdapMetadataService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;
use InvalidArgumentException;
use RuntimeException;
use Throwable;

class LdapGroupController extends Controller
{
    public function __construct(
        private readonly LdapGroupService $groupService,
        private readonly LdapMetadataService $metadata
    ) {
    }

    public function index(Request $request): View
    {
        $sort = $request->string('sort', 'name')->toString();
        $allowedSort = ['name', 'sam_account_name', 'type', 'members_count', 'description'];
        if (! in_array($sort, $allowedSort, true)) {
            $sort = 'name';
        }
        $dir = $request->string('dir', 'asc')->toString() === 'desc' ? 'desc' : 'asc';
        $search = $request->string('q')->trim()->toString();

        $result = $this->groupService->listGroups($sort, $dir, $search);
        $groups = $this->metadata->enrichGroups($result['rows']);

        if ($search !== '') {
            $existingKeys = array_column($groups, 'route_key');
            $metaMatches = LdapGroupMeta::query()
                ->where('admin_note', 'like', '%'.$search.'%')
                ->get();

            foreach ($metaMatches as $meta) {
                if (in_array($meta->group_key, $existingKeys, true)) {
                    continue;
                }

                try {
                    $groupData = $this->groupService->getGroup($meta->group_key);
                    $groupData['admin_note'] = $meta->admin_note ?? '';
                    $groups[] = $groupData;
                } catch (InvalidArgumentException) {
                }
            }
        }

        return view('ldap-groups.index', [
            'groups' => $groups,
            'meta' => array_merge($result['meta'], ['total' => count($groups)]),
            'sort' => $sort,
            'dir' => $dir,
            'search' => $search,
            'error' => $result['error'] ?? null,
        ]);
    }

    public function show(string $group): View|RedirectResponse
    {
        try {
            $groupData = $this->groupService->getGroup($group);
            $groupData['admin_note'] = $this->metadata->getGroupMeta($groupData['route_key'])['admin_note'];
            $usernames = $this->groupService->listUsernamesForSelect();

            return view('ldap-groups.show', [
                'group' => $groupData,
                'usernames' => $usernames,
            ]);
        } catch (InvalidArgumentException $e) {
            return redirect()->route('ldap-groups.index')->with('error', $e->getMessage());
        }
    }

    public function updateNote(Request $request, string $group): RedirectResponse
    {
        $data = $request->validate([
            'admin_note' => ['nullable', 'string', 'max:5000'],
        ]);

        try {
            $groupData = $this->groupService->getGroup($group);
            $this->metadata->saveGroupMeta(
                $groupData['route_key'],
                $groupData['name'],
                $data['admin_note'] ?? null
            );
            $request->attributes->set('audit_metadata', [
                'group' => $groupData['name'],
            ]);

            return redirect()->route('ldap-groups.show', $group)->with('success', 'Group note saved.');
        } catch (InvalidArgumentException|RuntimeException $e) {
            return back()->with('error', $e->getMessage());
        } catch (Throwable) {
            return back()->with('error', 'Failed to save group note.');
        }
    }

    public function store(Request $request): RedirectResponse
    {
        $data = $request->validate([
            'name' => ['required', 'string', 'max:64', 'regex:/^[a-zA-Z0-9 _.-]+$/'],
            'description' => ['nullable', 'string', 'max:255'],
            'confirm_create' => ['required', 'accepted'],
        ]);

        try {
            $this->groupService->createGroup($data['name'], $data['description'] ?? null);
            $request->attributes->set('audit_metadata', [
                'group' => $data['name'],
                'description' => $data['description'] ?? null,
            ]);

            return redirect()->route('ldap-groups.index')->with('success', "Group [{$data['name']}] created.");
        } catch (InvalidArgumentException|RuntimeException $e) {
            return back()->withInput()->with('error', $e->getMessage());
        } catch (Throwable) {
            return back()->withInput()->with('error', 'Failed to create group.');
        }
    }

    public function destroy(Request $request, string $group): RedirectResponse
    {
        $data = $request->validate([
            'confirm_delete' => ['required', 'accepted'],
            'confirm_group_name' => ['required', 'string'],
        ]);

        try {
            $groupData = $this->groupService->getGroup($group);

            if (mb_strtolower($data['confirm_group_name']) !== mb_strtolower($groupData['name'])) {
                return back()->with('error', 'Group name confirmation does not match.');
            }

            $this->groupService->deleteGroup($group);
            $request->attributes->set('audit_metadata', ['group' => $groupData['name']]);

            return redirect()->route('ldap-groups.index')->with('success', "Group [{$groupData['name']}] deleted.");
        } catch (InvalidArgumentException|RuntimeException $e) {
            return back()->with('error', $e->getMessage());
        } catch (Throwable) {
            return back()->with('error', 'Failed to delete group.');
        }
    }

    public function addMember(Request $request, string $group): RedirectResponse
    {
        $data = $request->validate([
            'username' => ['required', 'string', 'max:100'],
        ]);

        try {
            $this->groupService->addMember($group, $data['username']);
            $request->attributes->set('audit_metadata', [
                'group' => $group,
                'username' => $data['username'],
            ]);

            return redirect()->route('ldap-groups.show', $group)->with('success', "User [{$data['username']}] added to group.");
        } catch (InvalidArgumentException|RuntimeException $e) {
            return back()->with('error', $e->getMessage());
        } catch (Throwable) {
            return back()->with('error', 'Failed to add member.');
        }
    }

    public function removeMember(Request $request, string $group, string $username): RedirectResponse
    {
        $request->validate(['confirm' => ['required', 'accepted']]);

        try {
            $this->groupService->removeMember($group, $username);
            $request->attributes->set('audit_metadata', [
                'group' => $group,
                'username' => $username,
            ]);

            return redirect()->route('ldap-groups.show', $group)->with('success', "User [{$username}] removed from group.");
        } catch (InvalidArgumentException|RuntimeException $e) {
            return back()->with('error', $e->getMessage());
        } catch (Throwable) {
            return back()->with('error', 'Failed to remove member.');
        }
    }
}