<?php

namespace App\Policies;

use App\Models\User;
use App\Models\Expense;

class ExpensePolicy
{
    /**
     * Determine whether the user can view any expenses.
     */
    public function viewAny(User $user): bool
    {
        return $user->tenant_id === session('tenant_id')
            && ($user->hasRole('admin')
                || $user->hasRole('manager')
                || $user->hasRole('accountant')
                || $user->hasPermissionTo('view expenses'));
    }

    /**
     * Determine whether the user can view the expense.
     */
    public function view(User $user, Expense $expense): bool
    {
        if ($user->tenant_id !== $expense->tenant_id) {
            return false;
        }

        if ($user->hasRole('admin') || $user->hasRole('manager') || $user->hasRole('accountant')) {
            return true;
        }

        // Users can view their own expenses
        return $expense->requested_by === $user->id;
    }

    /**
     * Determine whether the user can create expenses.
     */
    public function create(User $user): bool
    {
        return $user->tenant_id === session('tenant_id')
            && ($user->hasRole('admin')
                || $user->hasRole('manager')
                || $user->hasRole('accountant')
                || $user->hasPermissionTo('create expenses'));
    }

    /**
     * Determine whether the user can update the expense.
     */
    public function update(User $user, Expense $expense): bool
    {
        if ($user->tenant_id !== $expense->tenant_id) {
            return false;
        }

        // Only pending expenses can be updated
        if ($expense->status !== 'pending') {
            return false;
        }

        if ($user->hasRole('admin') || $user->hasRole('manager') || $user->hasRole('accountant')) {
            return true;
        }

        return $expense->requested_by === $user->id;
    }

    /**
     * Determine whether the user can delete the expense.
     */
    public function delete(User $user, Expense $expense): bool
    {
        return $user->tenant_id === $expense->tenant_id
            && ($user->hasRole('admin')
                || $user->hasPermissionTo('delete expenses'));
    }

    /**
     * Determine whether the user can approve/reject expenses.
     */
    public function approve(User $user, Expense $expense): bool
    {
        return $user->tenant_id === $expense->tenant_id
            && ($user->hasRole('admin')
                || $user->hasRole('manager')
                || $user->hasPermissionTo('approve expenses'));
    }
}