<?php

/**
 * @author  Ball Studios <https://git.balls.studio>
 * @license MIT
 */

namespace Pterodactyl\Addons\AdvancedAdmin\Http\Controllers\Client;

use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Pterodactyl\Addons\AdvancedAdmin\Http\Resources\RoleResource;
use Pterodactyl\Addons\AdvancedAdmin\Http\Resources\EffectivePermissionResource;
use Pterodactyl\Addons\AdvancedAdmin\Models\ServerRoleAssignment;
use Pterodactyl\Addons\AdvancedAdmin\Services\Roles\PermissionResolver;
use Pterodactyl\Addons\AdvancedAdmin\Services\Roles\RoleService;
use Pterodactyl\Models\Server;

class ServerRoleController extends Controller
{
    public function __construct(
        private readonly RoleService         $roleService,
        private readonly PermissionResolver  $resolver,
    ) {}

    /** GET /api/client/servers/{server}/addons/roles/users */
    public function listUsers(Request $request, Server $server): JsonResponse
    {
        $this->authorizeServerAdmin($request, $server);

        $assignments = ServerRoleAssignment::query()
            ->where('server_id', $server->id)
            ->with(['user', 'role.permissions'])
            ->get()
            ->groupBy('user_id')
            ->map(function ($items) {
                $user  = $items->first()->user;
                $roles = $items->pluck('role');
                return ['user' => $user, 'roles' => $roles];
            })
            ->values();

        return response()->json(['data' => $assignments]);
    }

    /** POST /api/client/servers/{server}/addons/roles/assign */
    public function assign(Request $request, Server $server): JsonResponse
    {
        $this->authorizeServerAdmin($request, $server);

        $data = $request->validate([
            'user_id' => 'required|integer|exists:users,id',
            'role_id' => 'required|integer|exists:addon_roles,id',
        ]);

        $assignment = $this->roleService->assignToUser(
            $server->id,
            $data['user_id'],
            $data['role_id'],
            $request->user()->id,
        );

        return response()->json(['data' => $assignment], 201);
    }

    /** DELETE /api/client/servers/{server}/addons/roles/assign */
    public function unassign(Request $request, Server $server): JsonResponse
    {
        $this->authorizeServerAdmin($request, $server);

        $data = $request->validate([
            'user_id' => 'required|integer|exists:users,id',
            'role_id' => 'required|integer|exists:addon_roles,id',
        ]);

        $this->roleService->unassignFromUser(
            $server->id,
            $data['user_id'],
            $data['role_id'],
            $request->user()->id,
        );

        return response()->json(['deleted' => true]);
    }

    /** GET /api/client/servers/{server}/addons/permissions/effective/{userId} */
    public function effectivePermissions(Request $request, Server $server, string $targetUserId): JsonResponse
    {
        // Allow callers to pass "me" to resolve to their own user ID
        if ($targetUserId === 'me') {
            $targetUserId = (string) $request->user()?->id;
        }

        // Non-admins can only query their own permissions
        $user = $request->user();
        $isAdmin = $user && ($user->root_admin || $server->owner_id === $user->id);
        if (!$isAdmin && (string) $user?->id !== $targetUserId) {
            abort(403, 'You may only query your own permissions.');
        }

        // If target user is the owner, return an Owner role item
        if ((int) $targetUserId === $server->owner_id) {
            $ownerRole = [
                'role' => [
                    'id'          => 0,
                    'name'        => 'Owner',
                    'color'       => '#f59e0b',
                    'description' => 'Full server access — assigned to the server owner',
                    'permissions' => array_keys(RoleService::KNOWN_PERMISSIONS),
                    'created_at'  => now()->toIso8601String(),
                ],
                'source' => 'Server Owner',
            ];
            return response()->json(['data' => [$ownerRole]]);
        }

        // Get user's assigned roles on this server
        $roles = $this->resolver->getUserRolesForServer((int) $targetUserId, $server->id);

        $data = [];
        foreach ($roles as $role) {
            $allowedPermissions = [];
            foreach ($role->permissions as $p) {
                if ($p->value === 'allow') {
                    $allowedPermissions[] = $p->permission;
                }
            }

            $data[] = [
                'role' => [
                    'id'          => $role->id,
                    'name'        => $role->name,
                    'color'       => $role->color,
                    'description' => $role->description,
                    'permissions' => $allowedPermissions,
                    'created_at'  => $role->created_at?->toIso8601String(),
                ],
                'source' => 'Role Assignment',
            ];
        }

        return response()->json(['data' => $data]);
    }

    /** PUT /api/client/servers/{server}/addons/permissions/override */
    public function setOverride(Request $request, Server $server): JsonResponse
    {
        $this->authorizeServerAdmin($request, $server);

        $data = $request->validate([
            'user_id'    => 'required|integer|exists:users,id',
            'permission' => 'required|string|max:100',
            'value'      => 'required|in:allow,deny,unset',
        ]);

        $override = $this->roleService->setOverride(
            $server->id,
            $data['user_id'],
            $data['permission'],
            $data['value'],
            $request->user()->id,
        );

        return response()->json(['data' => $override]);
    }

    private function authorizeServerAdmin(Request $request, Server $server): void
    {
        $user = $request->user();
        abort_unless($user, 401);

        $isOwner = $server->owner_id === $user->id;
        $isAdmin = $user->root_admin;

        // Subusers with user.update can also manage roles on their server
        $isSubuserAdmin = false;
        if (!$isOwner && !$isAdmin) {
            $subuser = $server->subusers()->where('user_id', $user->id)->first();
            $isSubuserAdmin = $subuser && in_array('user.update', $subuser->permissions ?? [], true);
        }

        abort_unless($isOwner || $isAdmin || $isSubuserAdmin, 403, 'Insufficient privileges.');
    }
}