<?php

namespace App\Services\Hr;

use App\Models\Employee;
use App\Models\User;
use App\Models\UserProfile;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;

class EmployeeService
{
    /**
     * @param  array{search: string, sort: string, direction: 'asc'|'desc'}  $tableQuery
     */
    public function paginateForIndex(
        array $tableQuery,
        string $role = '',
        string $gender = '',
        string $employmentStatus = '',
        string $isActive = '',
    ): LengthAwarePaginator {
        $query = User::query()
            ->with(['profile', 'employee', 'roles'])
            ->when($tableQuery['search'] !== '', function ($query) use ($tableQuery): void {
                $search = $tableQuery['search'];
                $query->where(function ($query) use ($search): void {
                    $query->where('email', 'like', "%{$search}%")
                        ->orWhere('username', 'like', "%{$search}%")
                        ->orWhereHas('profile', function ($query) use ($search): void {
                            $query->where('full_name', 'like', "%{$search}%")
                                ->orWhere('phone_number', 'like', "%{$search}%");
                        });
                });
            })
            ->when(
                $role !== '',
                fn ($query) => $query->whereHas('roles', fn ($query) => $query->where('name', $role))
            )
            ->when(
                $gender !== '',
                fn ($query) => $query->whereHas('profile', fn ($query) => $query->where('gender', $gender))
            )
            ->when(
                $employmentStatus !== '',
                fn ($query) => $query->whereHas('employee', fn ($query) => $query->where('employment_status', $employmentStatus))
            )
            ->when(
                $isActive !== '',
                fn ($query) => $query->where('is_active', $isActive === '1')
            );

        $this->applySorting($query, $tableQuery['sort'], $tableQuery['direction']);

        return $query
            ->paginate(10)
            ->withQueryString();
    }

    /**
     * @param  array<string, mixed>  $validated
     */
    public function create(array $validated): void
    {
        DB::transaction(function () use ($validated): void {
            $user = User::create([
                'email' => $validated['email'],
                'username' => $validated['username'],
                'password' => Hash::make(config('auth.password_default')),
            ]);

            UserProfile::create([
                'user_id' => $user->id,
                'full_name' => $validated['full_name'],
                'phone_number' => $validated['phone_number'],
                'gender' => $validated['gender'],
                'birth_date' => $validated['birth_date'],
                'address' => $validated['address'],
            ]);

            $hasEmployee = ! empty($validated['join_date']) && ! empty($validated['employment_status']) && ! empty($validated['base_salary']);

            if ($hasEmployee) {
                Employee::create([
                    'user_id' => $user->id,
                    'join_date' => $validated['join_date'],
                    'employment_status' => $validated['employment_status'],
                    'base_salary' => $validated['base_salary'],
                ]);
            }

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

    /**
     * @param  array<string, mixed>  $validated
     */
    public function update(User $user, array $validated): void
    {
        $employee = $user->employee;

        DB::transaction(function () use ($validated, $user, $employee): void {
            $user->email = $validated['email'];
            $user->username = $validated['username'];
            $user->save();

            $user->profile()->updateOrCreate(
                ['user_id' => $user->id],
                [
                    'full_name' => $validated['full_name'],
                    'phone_number' => $validated['phone_number'],
                    'gender' => $validated['gender'],
                    'birth_date' => $validated['birth_date'],
                    'address' => $validated['address'],
                ],
            );

            $hasEmployee = ! empty($validated['join_date']) && ! empty($validated['employment_status']) && ! empty($validated['base_salary']);

            if ($hasEmployee) {
                if ($employee) {
                    $employee->join_date = $validated['join_date'];
                    $employee->employment_status = $validated['employment_status'];
                    $employee->base_salary = $validated['base_salary'];
                    $employee->save();
                } else {
                    Employee::create([
                        'user_id' => $user->id,
                        'join_date' => $validated['join_date'],
                        'employment_status' => $validated['employment_status'],
                        'base_salary' => $validated['base_salary'],
                    ]);
                }
            } else {
                if ($employee) {
                    $employee->delete();
                }
            }

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

    public function toggleStatus(User $user, bool $isActive): void
    {
        $user->is_active = $isActive;
        $user->save();

        if (! $isActive) {
            DB::table('sessions')->where('user_id', $user->id)->delete();
        }
    }

    public function resetPassword(User $user): void
    {
        $user->password = config('auth.password_default');
        $user->save();

        DB::table('sessions')->where('user_id', $user->id)->delete();
    }

    public function delete(User $user): void
    {
        DB::transaction(function () use ($user): void {
            $user->employee?->delete();
            $user->profile?->delete();
            $user->delete();
        });
    }

    private function applySorting(Builder $query, string $sort, string $direction): void
    {
        $employeeSorts = [
            'join_date',
            'base_salary',
            'employment_status',
        ];

        if (in_array($sort, $employeeSorts, true)) {
            $query->orderBy(
                Employee::select($sort)
                    ->whereColumn('employees.user_id', 'users.id')
                    ->limit(1),
                $direction
            );

            return;
        }

        if ($sort === 'full_name') {
            $query->orderBy(
                UserProfile::select('full_name')
                    ->whereColumn('user_profiles.user_id', 'users.id')
                    ->limit(1),
                $direction
            );

            return;
        }

        if ($sort === 'email') {
            $query->orderBy('email', $direction);

            return;
        }

        $query->latest();
    }
}