<?php

declare(strict_types=1);

namespace app\common\service\pharmacy;

use DomainException;

final class PharmacyHerbIdentityResolver
{
    /**
     * @param array<int,array<string,mixed>> $herbs
     * @param callable(array<int,int>):array<int,array<string,mixed>> $loadByIds
     * @param callable(array<int,string>):array<int,array<string,mixed>> $loadByNames
     * @return array<int,array<string,mixed>>
     */
    public static function resolve(array $herbs, callable $loadByIds, callable $loadByNames): array
    {
        $ids = [];
        $names = [];
        foreach ($herbs as $herb) {
            if (!is_array($herb)) {
                continue;
            }
            $id = (int) ($herb['medicine_id'] ?? $herb['id'] ?? 0);
            if ($id > 0) {
                $ids[] = $id;
                continue;
            }
            $name = trim((string) ($herb['name'] ?? $herb['title'] ?? ''));
            if ($name !== '') {
                $names[] = $name;
            }
        }

        $byId = [];
        foreach ($ids === [] ? [] : $loadByIds(array_values(array_unique($ids))) as $row) {
            if (self::isActive($row)) {
                $byId[(int) $row['id']] = $row;
            }
        }
        $byName = [];
        foreach ($names === [] ? [] : $loadByNames(array_values(array_unique($names))) as $row) {
            if (!self::isActive($row)) {
                continue;
            }
            $name = trim((string) ($row['name'] ?? ''));
            if ($name !== '') {
                $byName[$name][] = $row;
            }
        }

        $resolved = [];
        foreach ($herbs as $herb) {
            if (!is_array($herb)) {
                continue;
            }
            $name = trim((string) ($herb['name'] ?? $herb['title'] ?? ''));
            $id = (int) ($herb['medicine_id'] ?? $herb['id'] ?? 0);
            if ($id > 0) {
                $row = $byId[$id] ?? null;
                if (!is_array($row)) {
                    throw new DomainException('药材“' . ($name !== '' ? $name : (string) $id) . '”对应的本地药材不存在或已停用');
                }
            } else {
                if ($name === '') {
                    throw new DomainException('药材名称不能为空');
                }
                $candidates = $byName[$name] ?? [];
                if (count($candidates) === 0) {
                    throw new DomainException('药材“' . $name . '”未在本地药材库中找到');
                }
                if (count($candidates) !== 1) {
                    throw new DomainException('药材“' . $name . '”存在多个同名记录，请重新选择具体药材');
                }
                $row = $candidates[0];
                $id = (int) $row['id'];
            }

            $herb['medicine_id'] = $id;
            $herb['name'] = trim((string) ($row['name'] ?? $name));
            unset($herb['id'], $herb['title'], $herb['local_medicine_id']);
            $resolved[] = $herb;
        }

        if ($resolved === []) {
            throw new DomainException('处方药材不能为空');
        }

        return $resolved;
    }

    /** @param array<string,mixed> $row */
    private static function isActive(array $row): bool
    {
        return (int) ($row['id'] ?? 0) > 0
            && (int) ($row['status'] ?? 0) === 1
            && ($row['delete_time'] ?? null) === null;
    }
}