import { z } from 'zod';
import { SHAAM_VERSION } from '../../constants.js';
import { defaultKeyGenerator } from '../../utils/key-generator.js';
import { formatField, formatNumericField, joinFields } from '../index.js';
/**
 * A100 Record Schema - Business opening record
 * Fields 1100-1105 based on SHAAM 1.31 specification table
 */
export const A100Schema = z.object({
    // Field 1100: Record code (4) - Required - Alphanumeric
    code: z.literal('A100').describe('Record type code - always "A100"'),
    // Field 1101: Record number in file (9) - Required - Numeric
    recordNumber: z
        .number()
        .int()
        .min(1)
        .max(999_999_999)
        .describe('Sequential record number in BKMVDATA file'),
    // Field 1102: Tax ID (9) - Required - Numeric
    vatId: z.string().min(1).max(9).regex(/^\d+$/).describe('VAT identification number'),
    // Field 1103: Primary identifier (15) - Required - Numeric
    primaryIdentifier: z
        .number()
        .int()
        .min(1)
        .max(999_999_999_999_999)
        .describe('Fixed and unique primary identifier - see Note 2'),
    // Field 1104: System constant (8) - Required - Alphanumeric - Value: &OF1.31&
    systemConstant: z
        .literal(SHAAM_VERSION)
        .optional()
        .describe(`System constant - always "${SHAAM_VERSION}"`),
    // Field 1105: Reserved field (50) - Optional - Alphanumeric
    reserved: z.string().max(50).default('').describe('Reserved field for future use'),
});
/**
 * A100 Input Schema - for user input (excludes auto-generated fields)
 * Field 1103 (primaryIdentifier) is automatically generated
 */
export const A100InputSchema = A100Schema.omit({
    primaryIdentifier: true,
    code: true,
    systemConstant: true,
});
/**
 * Encodes an A100 record to fixed-width string format
 * Total line width: 95 characters + CRLF
 */
export function encodeA100(input) {
    const primaryIdentifier = parseInt(defaultKeyGenerator.getPrimaryIdentifier(), 10);
    const fullRecord = {
        code: 'A100',
        primaryIdentifier,
        systemConstant: SHAAM_VERSION,
        ...input,
    };
    const fields = [
        formatField(fullRecord.code, 4, 'left'), // Field 1100: Record code (4) - Alphanumeric
        formatNumericField(fullRecord.recordNumber.toString(), 9), // Field 1101: Record number (9) - Numeric, zero-padded
        formatNumericField(fullRecord.vatId, 9), // Field 1102: VAT ID (9) - Numeric, zero-padded
        formatNumericField(fullRecord.primaryIdentifier.toString(), 15), // Field 1103: Primary identifier (15) - Numeric, zero-padded
        formatField(SHAAM_VERSION, 8, 'left'), // Field 1104: System constant (8) - Alphanumeric
        formatField(fullRecord.reserved, 50, 'left'), // Field 1105: Reserved (50) - Alphanumeric
    ];
    return joinFields(fields);
}
/**
 * Parses a fixed-width A100 record line back to object
 * Expected line length: 95 characters (excluding CRLF)
 */
export function parseA100(line) {
    // Remove CRLF if present
    const cleanLine = line.replace(/\r?\n$/, '');
    if (cleanLine.length !== 95) {
        throw new Error(`Invalid A100 record length: expected 95 characters, got ${cleanLine.length}`);
    }
    // Extract fields at their fixed positions
    const code = cleanLine.slice(0, 4).trim();
    const recordNumber = parseInt(cleanLine.slice(4, 13).trim().replace(/^0+/, '') || '0', 10); // Strip leading zeros and convert to number
    const vatId = cleanLine.slice(13, 22).trim().replace(/^0+/, '') || '0'; // Strip leading zeros
    const primaryIdentifier = parseInt(cleanLine.slice(22, 37).trim().replace(/^0+/, '') || '0', 10); // Strip leading zeros and convert to number
    const systemConstant = cleanLine.slice(37, 45).trim();
    const reserved = cleanLine.slice(45, 95).trim();
    // Validate the code field
    if (code !== 'A100') {
        throw new Error(`Invalid A100 record code: expected "A100", got "${code}"`);
    }
    // Validate the system constant field
    if (systemConstant !== '&OF1.31&') {
        throw new Error(`Invalid system constant: expected "&OF1.31&", got "${systemConstant}"`);
    }
    const parsed = {
        code,
        recordNumber,
        vatId,
        primaryIdentifier,
        systemConstant: '&OF1.31&', // Always use the literal constant
        reserved,
    };
    // Validate against schema
    return A100Schema.parse(parsed);
}
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