<?php

namespace MintyPHP\Service\Org;

use MintyPHP\Repository\Org\DepartmentRepository;
use MintyPHP\Repository\Tenant\TenantDepartmentRepository;
use MintyPHP\Repository\Org\UserDepartmentRepository;
use MintyPHP\Service\Settings\SettingService;
use MintyPHP\Service\Tenant\TenantScopeService;

class DepartmentService
{
    public static function list(): array
    {
        return DepartmentRepository::list();
    }

    public static function listPaged(array $options): array
    {
        if (!empty($options['tenantUserId'])) {
            $tenantUserId = (int) $options['tenantUserId'];
            if ($tenantUserId > 0 && TenantScopeService::hasGlobalAccess($tenantUserId)) {
                unset($options['tenantUserId'], $options['tenantIds']);
            }
        }
        return DepartmentRepository::listPaged($options);
    }

    public static function listByTenantIds(array $tenantIds): array
    {
        return DepartmentRepository::listByTenantIds($tenantIds);
    }

    public static function listByIds(array $departmentIds): array
    {
        return DepartmentRepository::listByIds($departmentIds);
    }

    public static function listForUserAssignments(array $tenantIds, array $selectedDepartmentIds): array
    {
        $departments = $tenantIds ? self::listByTenantIds($tenantIds) : self::list();
        $extraDepartments = $selectedDepartmentIds ? self::listByIds($selectedDepartmentIds) : [];
        if (!$extraDepartments) {
            return $departments;
        }
        $departmentMap = [];
        foreach ($departments as $department) {
            if (isset($department['id'])) {
                $departmentMap[(int) $department['id']] = $department;
            }
        }
        foreach ($extraDepartments as $department) {
            if (isset($department['id'])) {
                $departmentMap[(int) $department['id']] = $department;
            }
        }
        return array_values($departmentMap);
    }

    public static function findByUuid(string $uuid): ?array
    {
        return DepartmentRepository::findByUuid($uuid);
    }

    public static function findById(int $id): ?array
    {
        return DepartmentRepository::find($id);
    }

    public static function createFromAdmin(array $input, int $currentUserId = 0): array
    {
        $form = self::sanitizeBase($input);
        $errors = self::validateBase($form);
        $warnings = self::warningsForCode($form, 0);

        if ($errors) {
            return ['ok' => false, 'errors' => $errors, 'warnings' => $warnings, 'form' => $form];
        }

        $createdId = DepartmentRepository::create([
            'description' => $form['description'],
            'code' => $form['code'] ?: null,
            'cost_center' => $form['cost_center'] ?: null,
            'active' => $form['active'],
            'created_by' => $currentUserId > 0 ? $currentUserId : null,
        ]);

        if (!$createdId) {
            return ['ok' => false, 'errors' => [t('Department can not be created')], 'form' => $form];
        }

        $createdDepartment = DepartmentRepository::find((int) $createdId);
        $uuid = $createdDepartment['uuid'] ?? null;
        if (!empty($input['is_default']) && $createdId) {
            SettingService::setDefaultDepartmentId((int) $createdId);
        }
        return ['ok' => true, 'form' => $form, 'warnings' => $warnings, 'uuid' => $uuid, 'id' => (int) $createdId];
    }

    public static function updateFromAdmin(int $departmentId, array $input, int $currentUserId = 0): array
    {
        $form = self::sanitizeBase($input);
        $errors = self::validateBase($form);
        $warnings = self::warningsForCode($form, $departmentId);

        if ($errors) {
            return ['ok' => false, 'errors' => $errors, 'warnings' => $warnings, 'form' => $form];
        }

        $updated = DepartmentRepository::update($departmentId, [
            'description' => $form['description'],
            'code' => $form['code'] ?: null,
            'cost_center' => $form['cost_center'] ?: null,
            'active' => $form['active'],
            'modified_by' => $currentUserId > 0 ? $currentUserId : null,
        ]);

        if (!$updated) {
            return ['ok' => false, 'errors' => [t('Department can not be updated')], 'form' => $form];
        }

        return ['ok' => true, 'form' => $form, 'warnings' => $warnings];
    }

    public static function syncTenants(int $departmentId, array $tenantIds): int
    {
        $updated = TenantDepartmentRepository::replaceForDepartment($departmentId, $tenantIds);
        if (!$updated) {
            return -1;
        }
        return UserDepartmentRepository::removeInvalidForDepartment($departmentId);
    }

    public static function deleteByUuid(string $uuid): array
    {
        $uuid = trim($uuid);
        if ($uuid === '') {
            return ['ok' => false, 'status' => 404, 'error' => 'not_found'];
        }

        $department = DepartmentRepository::findByUuid($uuid);
        if (!$department || !isset($department['id'])) {
            return ['ok' => false, 'status' => 404, 'error' => 'not_found'];
        }

        $deleted = DepartmentRepository::delete((int) $department['id']);
        if (!$deleted) {
            return ['ok' => false, 'status' => 500, 'error' => 'delete_failed'];
        }

        return ['ok' => true, 'department' => $department];
    }

    private static function sanitizeBase(array $input): array
    {
        return [
            'description' => trim((string) ($input['description'] ?? '')),
            'code' => trim((string) ($input['code'] ?? '')),
            'cost_center' => trim((string) ($input['cost_center'] ?? '')),
            'active' => self::normalizeActive($input['active'] ?? 1),
        ];
    }

    private static function validateBase(array $form): array
    {
        $errors = [];
        if ($form['description'] === '') {
            $errors[] = t('Description cannot be empty');
        }
        return $errors;
    }

    private static function warningsForCode(array $form, int $excludeId): array
    {
        $warnings = [];
        $code = $form['code'] ?? '';
        if ($code !== '' && DepartmentRepository::existsByCode($code, $excludeId)) {
            $warnings[] = t('Department code already exists');
        }
        return $warnings;
    }

    private static function normalizeActive($value): int
    {
        $value = strtolower(trim((string) $value));
        if (in_array($value, ['0', 'false', 'inactive'], true)) {
            return 0;
        }
        return 1;
    }
}