import { z } from 'zod';
import { SHAAM_VERSION } from '../../constants.js';
import { CRLF } from '../../format/index.js';
import { defaultKeyGenerator } from '../../utils/key-generator.js';
import { formatField, formatNumericField } from '../format/encoder.js';
/**
 * Z900 Record Schema - Closing record
 * Fields 1150-1156 based on SHAAM 1.31 specification
 */
export const Z900Schema = z.object({
    code: z.literal('Z900').describe('Record type code - always "Z900"'),
    recordNumber: z.number().int().min(1).max(999_999_999).describe('Sequential record number'),
    vatId: z.string().min(1).max(9).describe('VAT identification number - numeric field'),
    uniqueId: z.number().int().min(1).max(999_999_999_999_999).describe('Unique business identifier'),
    totalRecords: z
        .number()
        .int()
        .min(1)
        .max(999_999_999_999_999)
        .describe('Total number of records in file'),
    reserved: z.string().max(50).default('').describe('Reserved field for future use'),
});
/**
 * Z900 Input Schema - for user input (excludes auto-generated fields)
 * Field 1153 (uniqueId) is automatically generated to match field 1103
 */
export const Z900InputSchema = Z900Schema.omit({
    uniqueId: true,
    code: true,
});
/**
 * Encodes a Z900 record to fixed-width string format
 * Total line width: 110 characters + CRLF
 */
export function encodeZ900(input) {
    const uniqueId = parseInt(defaultKeyGenerator.getPrimaryIdentifier(), 10);
    const fullRecord = {
        code: 'Z900',
        uniqueId,
        ...input,
    };
    const fields = [
        formatField(fullRecord.code, 4, 'left'), // Field 1150: Record code (4) - Alphanumeric
        formatNumericField(fullRecord.recordNumber.toString(), 9), // Field 1151: Record number (9) - Numeric
        formatNumericField(fullRecord.vatId, 9), // Field 1152: VAT ID (9) - Numeric
        formatNumericField(fullRecord.uniqueId.toString(), 15), // Field 1153: Unique ID (15) - Numeric
        formatField(SHAAM_VERSION, 8, 'left'), // Field 1154: SHAAM version (8) - Alphanumeric
        formatNumericField(fullRecord.totalRecords.toString(), 15), // Field 1155: Total records (15) - Numeric
        formatField(fullRecord.reserved, 50, 'left'), // Field 1156: Reserved (50) - Alphanumeric
    ];
    return fields.join('') + CRLF;
}
/**
 * Parses a fixed-width Z900 record line back to object
 * Expected line length: 110 characters (excluding CRLF)
 */
export function parseZ900(line) {
    // Remove CRLF if present
    const cleanLine = line.replace(/\r?\n$/, '');
    if (cleanLine.length !== 110) {
        throw new Error(`Invalid Z900 record length: expected 110 characters, got ${cleanLine.length}`);
    }
    // Extract fields at their fixed positions
    const code = cleanLine.slice(0, 4).trim();
    const recordNumber = parseInt(cleanLine.slice(4, 13).trim().replace(/^0+/, '') || '0', 10);
    const vatId = cleanLine.slice(13, 22).trim().replace(/^0+/, '') || '0';
    const uniqueId = parseInt(cleanLine.slice(22, 37).trim().replace(/^0+/, '') || '0', 10);
    const systemCode = cleanLine.slice(37, 45).trim();
    const totalRecords = parseInt(cleanLine.slice(45, 60).trim().replace(/^0+/, '') || '0', 10);
    const reserved = cleanLine.slice(60, 110).trim();
    // Validate the code field
    if (code !== 'Z900') {
        throw new Error(`Invalid Z900 record code: expected "Z900", got "${code}"`);
    }
    // Validate the SHAAM version field
    if (systemCode !== SHAAM_VERSION) {
        throw new Error(`Invalid SHAAM version: expected "${SHAAM_VERSION}", got "${systemCode}"`);
    }
    const parsed = {
        code,
        recordNumber,
        vatId,
        uniqueId,
        totalRecords,
        reserved,
    };
    // Validate against schema
    return Z900Schema.parse(parsed);
}
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