import { createRequire } from 'module';
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';
import PocketBase from 'pocketbase';

const require = createRequire(import.meta.url);
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

let runtimeConfig = {};
try {
    runtimeConfig = require('../pocket-base/bai_api_pb_hooks/bai_api_shared/config/runtime.js');
} catch (_error) {
    runtimeConfig = {};
}

function readEnvFile(filePath) {
    if (!fs.existsSync(filePath)) return {};

    const content = fs.readFileSync(filePath, 'utf8');
    const result = {};

    for (const rawLine of content.split(/\r?\n/)) {
        const line = rawLine.trim();
        if (!line || line.startsWith('#')) continue;

        const index = line.indexOf('=');
        if (index === -1) continue;

        const key = line.slice(0, index).trim();
        const value = line.slice(index + 1).trim();
        result[key] = value;
    }

    return result;
}

const backendEnv = readEnvFile(path.resolve(__dirname, '..', 'back-end', '.env'));
const PB_URL = String(
    process.env.PB_URL
    || backendEnv.POCKETBASE_API_URL
    || runtimeConfig.POCKETBASE_API_URL
    || 'http://127.0.0.1:8090'
).replace(/\/+$/, '');
const AUTH_TOKEN = process.env.POCKETBASE_AUTH_TOKEN || runtimeConfig.POCKETBASE_AUTH_TOKEN || '';

if (!AUTH_TOKEN) {
    console.error('❌ 缺少 POCKETBASE_AUTH_TOKEN，无法执行 tbl_order 自动编号迁移。');
    process.exit(1);
}

const pb = new PocketBase(PB_URL);

const ORDER_ID_PATTERN = 'ORDER-[0-9]{13}-[A-Za-z0-9]{6}';
const ORDER_NUMBER_PATTERN = '[0-9]{18}';

function normalizeFieldPayload(field, overrides) {
    const payload = Object.assign({}, field, overrides || {});

    if (payload.type === 'number') {
        if (Object.prototype.hasOwnProperty.call(payload, 'onlyInt')) payload.onlyInt = !!payload.onlyInt;
    }

    if (payload.type === 'autodate') {
        payload.onCreate = typeof payload.onCreate === 'boolean' ? payload.onCreate : true;
        payload.onUpdate = typeof payload.onUpdate === 'boolean' ? payload.onUpdate : false;
    }

    if (payload.type === 'file') {
        payload.maxSelect = typeof payload.maxSelect === 'number' ? payload.maxSelect : 0;
        payload.maxSize = typeof payload.maxSize === 'number' ? payload.maxSize : 0;
        payload.mimeTypes = Array.isArray(payload.mimeTypes) ? payload.mimeTypes : null;
    }

    if (payload.type === 'relation') {
        payload.maxSelect = typeof payload.maxSelect === 'number' ? payload.maxSelect : 1;
        payload.cascadeDelete = typeof payload.cascadeDelete === 'boolean' ? payload.cascadeDelete : false;
    }

    return payload;
}

function buildCollectionPayload(collection, fields) {
    return {
        name: collection.name,
        type: collection.type,
        listRule: collection.listRule,
        viewRule: collection.viewRule,
        createRule: collection.createRule,
        updateRule: collection.updateRule,
        deleteRule: collection.deleteRule,
        fields,
        indexes: collection.indexes || [],
    };
}

async function migrateOrderFields() {
    const collection = await pb.collections.getOne('tbl_order');
    const fields = Array.isArray(collection.fields) ? collection.fields : [];

    const orderIdField = fields.find((field) => field && field.name === 'order_id');
    const orderNumberField = fields.find((field) => field && field.name === 'order_number');

    if (!orderIdField || !orderNumberField) {
        throw new Error('tbl_order 缺少 order_id 或 order_number 字段');
    }

    const orderIdReady = orderIdField.type === 'text' && String(orderIdField.autogeneratePattern || '') === ORDER_ID_PATTERN;
    const orderNumberReady = orderNumberField.type === 'text'
        && String(orderNumberField.autogeneratePattern || '') === ORDER_NUMBER_PATTERN;

    if (orderIdReady && orderNumberReady) {
        return {
            action: 'skipped',
            order_id: {
                type: orderIdField.type,
                autogeneratePattern: String(orderIdField.autogeneratePattern || ''),
            },
            order_number: {
                type: orderNumberField.type,
            },
        };
    }

    const nextFields = fields
        .filter((field) => field && field.name !== 'id')
        .map((field) => {
            if (field.name === 'order_id') {
                return normalizeFieldPayload(field, {
                    type: 'text',
                    required: true,
                    autogeneratePattern: ORDER_ID_PATTERN,
                });
            }

            if (field.name === 'order_number') {
                return normalizeFieldPayload(field, {
                    type: 'text',
                    required: true,
                    autogeneratePattern: ORDER_NUMBER_PATTERN,
                    pattern: '',
                });
            }

            return normalizeFieldPayload(field);
        });

    await pb.collections.update(collection.id, buildCollectionPayload(collection, nextFields));

    return {
        action: 'updated',
    };
}

async function verifyOrderFields() {
    const collection = await pb.collections.getOne('tbl_order');
    const orderIdField = (collection.fields || []).find((field) => field && field.name === 'order_id');
    const orderNumberField = (collection.fields || []).find((field) => field && field.name === 'order_number');

    const result = {
        order_id: {
            type: orderIdField ? orderIdField.type : '',
            autogeneratePattern: String(orderIdField && orderIdField.autogeneratePattern || ''),
            ok: !!orderIdField && orderIdField.type === 'text' && String(orderIdField.autogeneratePattern || '') === ORDER_ID_PATTERN,
        },
        order_number: {
            type: orderNumberField ? orderNumberField.type : '',
            autogeneratePattern: String(orderNumberField && orderNumberField.autogeneratePattern || ''),
            ok: !!orderNumberField
                && orderNumberField.type === 'text'
                && String(orderNumberField.autogeneratePattern || '') === ORDER_NUMBER_PATTERN,
        },
    };

    if (!result.order_id.ok || !result.order_number.ok) {
        throw new Error('tbl_order 自动编号规则校验失败: ' + JSON.stringify(result, null, 2));
    }

    return result;
}

async function main() {
    try {
        console.log(`🔄 正在连接 PocketBase: ${PB_URL}`);
        pb.authStore.save(AUTH_TOKEN, null);
        console.log('✅ 已使用 POCKETBASE_AUTH_TOKEN 载入认证状态。');

        const migrated = await migrateOrderFields();
        console.log('📝 迁移结果：');
        console.log(JSON.stringify(migrated, null, 2));

        const verified = await verifyOrderFields();
        console.log('📝 校验结果：');
        console.log(JSON.stringify(verified, null, 2));

        console.log('🎉 tbl_order 自动编号规则已就绪。');
    } catch (error) {
        console.error('❌ tbl_order 自动编号迁移失败:');
        console.error('status:', error && error.status);
        console.error('message:', error && error.message);
        console.error('response:', error && error.response);
        console.error('originalError:', error && error.originalError);
        console.error('stack:', error && error.stack);
        process.exitCode = 1;
    }
}

main();