<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Http\Responses\ApiResponse;
use App\Models\User;
use App\Services\ActivityLogger;
use App\Support\AccessControl;
use App\Support\EntityResolver;
use App\Support\PasswordPolicy;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\Facades\Hash;

class UserController extends Controller
{
    public function referralTargets(Request $request): JsonResponse
    {
        $actor = $request->user();
        $query = User::query()->where('is_active', true)->whereKeyNot($actor->id)
            ->whereHas('roles', fn ($roles) => $roles->whereIn('name', ['agent', 'supervisor']))
            ->with('roles:id,name', 'teams:id,name');

        if (! $actor->hasRole('admin')) {
            $teamIds = AccessControl::teamIds($actor);
            $query->whereHas('teams', fn ($teams) => $teams->whereIn('teams.id', $teamIds));
        }

        return response()->json($query->orderBy('name')->get()->map(fn (User $user) => [
            'id' => $user->id,
            'name' => $user->name,
            'role' => $user->roles->first()?->name,
            'team' => $user->teams->first()?->name,
        ])->values());
    }

    public function assignable(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'context' => 'required|in:task',
            'entity_type' => 'nullable|required_with:entity_id|in:lead,contact,company,deal,call,campaign',
            'entity_id' => 'nullable|required_with:entity_type|integer|min:1',
            'search' => 'nullable|string|max:120',
        ]);
        $actor = $request->user();
        abort_unless($actor->can('create_tasks') || $actor->can('assign_tasks'), 403);

        if (! empty($validated['entity_type'])) {
            EntityResolver::authorize($validated['entity_type'], (int) $validated['entity_id']);
        }

        $query = User::query()->where('is_active', true)->with(['roles:id,name', 'teams:id,name'])->withCount([
            'assignedTasks as open_tasks_count' => fn ($tasks) => $tasks->active(),
        ]);

        if ($actor->hasRole('supervisor')) {
            $query->whereIn('id', array_values(array_unique(array_merge([$actor->id], AccessControl::teamMemberIds($actor)))));
        } elseif (! $actor->hasRole('admin')) {
            $query->whereKey($actor->id);
        }
        if (! empty($validated['search'])) {
            $query->where('name', 'like', '%'.trim($validated['search']).'%');
        }

        $users = $query->orderBy('name')->limit(20)->get()->map(fn (User $user) => [
            'id' => $user->id,
            'name' => $user->name,
            'avatar' => $user->avatar_url,
            'role_label' => $user->roles->first()?->name,
            'team_label' => $user->teams->first()?->name,
            'is_active' => $user->is_active,
            'open_tasks_count' => $user->open_tasks_count,
        ])->values()->all();

        return ApiResponse::success($users);
    }

    public function index(Request $request): JsonResponse
    {
        Gate::authorize('viewAny', User::class);

        $query = User::with('roles', 'teams');

        if ($request->search) {
            $query->where(function ($q) use ($request) {
                $q->where('name', 'like', "%{$request->search}%")
                    ->orWhere('email', 'like', "%{$request->search}%")
                    ->orWhere('phone', 'like', "%{$request->search}%")
                    ->orWhere('voip_extension', 'like', "%{$request->search}%");
            });
        }

        if ($request->role) {
            $query->role($request->role);
        }

        if ($request->team_id) {
            $query->whereHas('teams', fn ($q) => $q->where('teams.id', $request->team_id));
        }

        if ($request->has('is_active')) {
            $query->where('is_active', filter_var($request->is_active, FILTER_VALIDATE_BOOLEAN));
        }

        $users = $query->orderBy('created_at', 'desc')->paginate($request->per_page ?? 15);

        return response()->json($users);
    }

    public function agents(): JsonResponse
    {
        $user = auth()->user();

        if ($user?->hasRole('agent')) {
            return response()->json([$user->load('roles', 'teams')]);
        }

        if ($user?->hasRole('supervisor')) {
            return response()->json(
                User::role('agent')
                    ->whereIn('id', AccessControl::teamMemberIds($user))
                    ->where('is_active', true)
                    ->with('roles', 'teams')
                    ->orderBy('name')
                    ->get()
            );
        }

        return response()->json(
            User::role('agent')
                ->where('is_active', true)
                ->with('roles', 'teams')
                ->orderBy('name')
                ->get()
        );
    }

    public function store(Request $request): JsonResponse
    {
        Gate::authorize('create', User::class);

        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'email' => 'required|email|unique:users',
            'password' => ['required', ...PasswordPolicy::rules()],
            'phone' => 'nullable|string|max:20',
            'voip_extension' => ['nullable', 'string', 'max:20', 'regex:/^[0-9*#]+$/', 'unique:users,voip_extension'],
            'role' => 'required|string|exists:roles,name',
        ]);

        $user = User::create([
            'name' => $validated['name'],
            'email' => $validated['email'],
            'password' => Hash::make($validated['password']),
            'phone' => $validated['phone'] ?? null,
            'voip_extension' => $validated['voip_extension'] ?? null,
        ]);

        $user->assignRole($validated['role']);

        ActivityLogger::log('user_created', "User {$user->email} created");

        return response()->json($user->load('roles'), 201);
    }

    public function show(User $user): JsonResponse
    {
        Gate::authorize('view', $user);

        return response()->json($user->load('roles.permissions', 'teams'));
    }

    public function update(Request $request, User $user): JsonResponse
    {
        Gate::authorize('update', $user);

        $validated = $request->validate([
            'name' => 'sometimes|string|max:255',
            'email' => 'sometimes|email|unique:users,email,'.$user->id,
            'password' => ['sometimes', ...PasswordPolicy::rules()],
            'phone' => 'nullable|string|max:20',
            'voip_extension' => ['nullable', 'string', 'max:20', 'regex:/^[0-9*#]+$/', 'unique:users,voip_extension,'.$user->id],
            'is_active' => 'sometimes|boolean',
        ]);

        if (isset($validated['password'])) {
            $validated['password'] = Hash::make($validated['password']);
        }

        $user->update($validated);

        if ($request->role) {
            $user->syncRoles([$request->role]);
        }

        ActivityLogger::log('user_updated', "User {$user->email} updated");

        return response()->json($user->load('roles', 'teams'));
    }

    public function destroy(User $user): JsonResponse
    {
        Gate::authorize('delete', $user);

        $user->delete();

        ActivityLogger::log('user_deleted', "User {$user->email} deleted");

        return response()->json(['message' => 'کاربر حذف شد']);
    }

    public function toggleActive(User $user): JsonResponse
    {
        Gate::authorize('update', $user);

        $user->update(['is_active' => ! $user->is_active]);

        ActivityLogger::log('user_toggled', "User {$user->email} active: {$user->is_active}");

        return response()->json($user);
    }

    public function assignRole(Request $request, User $user): JsonResponse
    {
        Gate::authorize('update', $user);

        $request->validate(['role' => 'required|string|exists:roles,name']);
        $user->syncRoles([$request->role]);

        return response()->json($user->load('roles'));
    }

    public function assignTeam(Request $request, User $user): JsonResponse
    {
        Gate::authorize('update', $user);

        $request->validate(['team_ids' => 'required|array', 'team_ids.*' => 'exists:teams,id']);
        $user->teams()->sync($request->team_ids);

        return response()->json($user->load('teams'));
    }
}