<?php

declare(strict_types=1);

namespace app\adminapi\logic\pharmacy;

use app\common\logic\BaseLogic;
use app\common\service\pharmacy\EjMedicineCatalogSyncService;
use app\common\service\pharmacy\EjMedicineMappingPolicy;
use think\facade\Db;
use think\facade\Config;
use Throwable;

class MedicineMappingLogic extends BaseLogic
{
    public static function save(array $params, int $operatorId, string $operatorName): bool
    {
        self::$error = '';
        try {
            Db::transaction(function () use ($params, $operatorId, $operatorName): void {
                $localId = (int) $params['local_medicine_id'];
                $medicineCode = trim((string) $params['medicine_code']);
                $local = Db::name('doctor_medicine')->where('id', $localId)->lock(true)->find();
                $remote = Db::name('ej_medicine_catalog')->where('medicine_code', $medicineCode)->lock(true)->find();
                EjMedicineMappingPolicy::assertValid($local ?: [], $remote ?: []);

                $now = time();
                $mapping = Db::name('ej_medicine_mapping')
                    ->where('local_medicine_id', $localId)
                    ->lock(true)
                    ->find();
                $values = [
                    'medicine_code' => $medicineCode,
                    'status' => 1,
                    'operator_id' => $operatorId,
                    'operator_name' => mb_substr(trim($operatorName), 0, 80),
                    'update_time' => $now,
                    'delete_time' => null,
                ];
                if ($mapping) {
                    Db::name('ej_medicine_mapping')->where('id', (int) $mapping['id'])->update($values);
                    return;
                }
                Db::name('ej_medicine_mapping')->insert(array_merge($values, [
                    'local_medicine_id' => $localId,
                    'create_time' => $now,
                ]));
            });
            return true;
        } catch (Throwable $exception) {
            self::setError(self::isDuplicateKey($exception)
                ? '该本地药材映射刚被其他操作更新，请刷新后重试'
                : $exception->getMessage());
            return false;
        }
    }

    public static function unlink(int $localMedicineId, int $operatorId, string $operatorName): bool
    {
        self::$error = '';
        try {
            Db::transaction(function () use ($localMedicineId, $operatorId, $operatorName): void {
                $local = Db::name('doctor_medicine')->where('id', $localMedicineId)->lock(true)->find();
                $mapping = Db::name('ej_medicine_mapping')
                    ->where('local_medicine_id', $localMedicineId)
                    ->lock(true)
                    ->find();
                $decision = EjMedicineMappingPolicy::unlinkDecision($local ?: [], $mapping ?: null);
                if ($decision['already_unlinked']) {
                    return;
                }

                $now = time();
                Db::name('ej_medicine_mapping')
                    ->where('id', $decision['mapping_id'])
                    ->where('local_medicine_id', $localMedicineId)
                    ->where('status', 1)
                    ->whereNull('delete_time')
                    ->update([
                        'status' => 0,
                        'operator_id' => $operatorId,
                        'operator_name' => mb_substr(trim($operatorName), 0, 80),
                        'update_time' => $now,
                        'delete_time' => $now,
                    ]);
            });
            return true;
        } catch (Throwable $exception) {
            self::setError($exception->getMessage());
            return false;
        }
    }

    /** @return array<string,mixed>|false */
    public static function sync()
    {
        self::$error = '';
        try {
            return EjMedicineCatalogSyncService::sync(200);
        } catch (Throwable $exception) {
            self::setError($exception->getMessage());
            return false;
        }
    }

    /** @return array<string,mixed> */
    public static function status(): array
    {
        $state = Db::name('ej_pharmacy_sync_state')->where('id', 1)->find() ?: [];
        $catalogTotal = (int) Db::name('ej_medicine_catalog')->count();
        $catalogActive = (int) Db::name('ej_medicine_catalog')
            ->where('status', 1)->where('remote_deleted', 0)->count();
        $unmappedLocal = (int) Db::name('doctor_medicine')->alias('l')
            ->leftJoin(
                'ej_medicine_mapping m',
                'm.local_medicine_id = l.id AND m.status = 1 AND m.delete_time IS NULL'
            )
            ->where('l.status', 1)
            ->whereNull('l.delete_time')
            ->whereNull('m.id')
            ->count('l.id');

        return [
            'sync_enabled' => (bool) Config::get('ej_pharmacy.catalog_sync_enabled', false),
            'cursor' => (int) ($state['cursor'] ?? 0),
            'last_success_time' => (int) ($state['last_success_time'] ?? 0),
            'last_failure_time' => (int) ($state['last_failure_time'] ?? 0),
            'last_error_summary' => (string) ($state['last_error_summary'] ?? ''),
            'is_syncing' => !empty($state['lock_token']) && (int) ($state['lock_expires_at'] ?? 0) >= time(),
            'catalog_total' => $catalogTotal,
            'catalog_active' => $catalogActive,
            'unmapped_local' => $unmappedLocal,
        ];
    }

    /** @return array<int,array<string,mixed>> */
    public static function catalogOptions(string $keyword, int $limit = 30): array
    {
        $query = Db::name('ej_medicine_catalog')
            ->where('status', 1)
            ->where('remote_deleted', 0);
        $keyword = trim($keyword);
        if ($keyword !== '') {
            $query->where(function ($nested) use ($keyword): void {
                $nested->where('name', 'like', '%' . $keyword . '%')
                    ->whereOr('medicine_code', 'like', '%' . $keyword . '%');
            });
        }
        return $query
            ->field('medicine_code,name,brand,unit,settlement_price,retail_price,catalog_version,status')
            ->order('catalog_version', 'desc')
            ->limit(min(max($limit, 1), 50))
            ->select()
            ->toArray();
    }

    private static function isDuplicateKey(Throwable $exception): bool
    {
        return (string) $exception->getCode() === '23000'
            || str_contains(strtolower($exception->getMessage()), 'duplicate');
    }
}