/**
 * @file pdf.ts
 * @description PDF generation configuration interfaces
 * Templates, branding, layout, headers/footers, and security
 */

import * as plugins from './plugins.js';
import type {
  TPageSize,
  TPageOrientation,
  THeaderFooterContentType,
  TPageNumberFormat,
  TPdfEncryptionAlgorithm,
  TPdfPrintingPermission,
  TPdfJobStatus,
} from './types.js';

// ============================================================================
// FONT CONFIGURATION
// ============================================================================

/**
 * Font configuration
 */
export interface IFontConfig {
  family: string;
  fallback: string[];
  size: number;
  lineHeight: number;
  weight?: 'normal' | 'bold' | number;
}

// ============================================================================
// BRANDING
// ============================================================================

/**
 * Logo configuration
 */
export interface ILogoConfig {
  url: string;
  position: 'left' | 'center' | 'right';
  maxWidth: number;
  maxHeight: number;
}

/**
 * Watermark configuration
 */
export interface IWatermarkConfig {
  text?: string;
  imageUrl?: string;
  opacity: number;
  position: 'center' | 'diagonal';
  showOnlyOnDraft: boolean;
}

/**
 * Branding configuration for PDF
 */
export interface IPdfBranding {
  logo?: ILogoConfig;
  primaryColor: string;
  secondaryColor: string;
  textColor: string;
  fonts: {
    heading: IFontConfig;
    body: IFontConfig;
    monospace?: IFontConfig;
  };
  watermark?: IWatermarkConfig;
}

// ============================================================================
// LAYOUT
// ============================================================================

/**
 * Custom page size
 */
export interface ICustomPageSize {
  width: number;
  height: number;
}

/**
 * Page margins
 */
export interface IPageMargins {
  top: number;
  right: number;
  bottom: number;
  left: number;
}

/**
 * PDF layout configuration
 */
export interface IPdfLayout {
  pageSize: TPageSize;
  customSize?: ICustomPageSize;
  orientation: TPageOrientation;
  margins: IPageMargins;
  columns: 1 | 2;
  columnGap?: number;
  paragraphSpacing: number;
  sectionSpacing: number;
  firstPageDifferent: boolean;
  firstPageMargins?: IPageMargins;
}

// ============================================================================
// HEADER/FOOTER
// ============================================================================

/**
 * Header/Footer content definition
 */
export interface IPdfHeaderFooterContent {
  type: THeaderFooterContentType;
  text?: string;
  imageUrl?: string;
  pageNumberFormat?: TPageNumberFormat;
  pageNumberPrefix?: string;
  includeTotal?: boolean;
  dateFormat?: string;
  customTemplate?: string;
  fontSize?: number;
  fontWeight?: 'normal' | 'bold';
  color?: string;
}

/**
 * Header/Footer configuration
 */
export interface IPdfHeaderFooter {
  enabled: boolean;
  height: number;
  left?: IPdfHeaderFooterContent;
  center?: IPdfHeaderFooterContent;
  right?: IPdfHeaderFooterContent;
  borderBottom?: boolean;
  borderTop?: boolean;
  borderColor?: string;
  skipFirstPage: boolean;
  skipLastPage: boolean;
}

// ============================================================================
// PAGE NUMBERING
// ============================================================================

/**
 * Page numbering configuration
 */
export interface IPdfPageNumbering {
  enabled: boolean;
  startFrom: number;
  format: TPageNumberFormat;
  position: 'header' | 'footer';
  alignment: 'left' | 'center' | 'right';
  prefix?: string;
  suffix?: string;
}

// ============================================================================
// CONTENT OPTIONS
// ============================================================================

/**
 * Table of contents configuration
 */
export interface ITocConfig {
  enabled: boolean;
  depth: number;
  title: string;
  pageBreakAfter: boolean;
}

/**
 * Cover page configuration
 */
export interface ICoverPageConfig {
  enabled: boolean;
  template: 'standard' | 'minimal' | 'custom';
  customTemplateId?: string;
  showLogo: boolean;
  showDate: boolean;
  showParties: boolean;
  showConfidentialityNotice: boolean;
  confidentialityText?: string;
}

/**
 * Signature page configuration
 */
export interface ISignaturePageConfig {
  enabled: boolean;
  signatureBlockStyle: 'inline' | 'separate_page' | 'both';
  includeWitnessLines: boolean;
  includeInitialsOnEachPage: boolean;
}

/**
 * Attachment handling configuration
 */
export interface IAttachmentConfig {
  includeInline: boolean;
  includeSeparately: boolean;
  attachmentToc: boolean;
}

/**
 * Content formatting configuration
 */
export interface IFormattingConfig {
  headingNumbering: boolean;
  paragraphNumbering: boolean;
  preserveMarkdownFormatting: boolean;
  convertLinksToFootnotes: boolean;
}

/**
 * Content rendering options
 */
export interface IPdfContentOptions {
  tableOfContents: ITocConfig;
  coverPage?: ICoverPageConfig;
  signaturePages: ISignaturePageConfig;
  attachments: IAttachmentConfig;
  formatting: IFormattingConfig;
}

// ============================================================================
// SECURITY
// ============================================================================

/**
 * Encryption configuration
 */
export interface IPdfEncryption {
  enabled: boolean;
  algorithm: TPdfEncryptionAlgorithm;
}

/**
 * Password protection
 */
export interface IPdfPasswords {
  userPassword?: string;
  ownerPassword?: string;
}

/**
 * PDF permissions
 */
export interface IPdfPermissions {
  printing: TPdfPrintingPermission;
  copying: boolean;
  modifying: boolean;
  annotating: boolean;
  formFilling: boolean;
  accessibility: boolean;
  assembly: boolean;
}

/**
 * PDF digital signature configuration
 */
export interface IPdfDigitalSignature {
  enabled: boolean;
  certificateId: string;
  signatureReason: string;
  signatureLocation?: string;
  timestampAuthority?: string;
}

/**
 * PDF security options
 */
export interface IPdfSecurity {
  encryption: IPdfEncryption;
  passwords?: IPdfPasswords;
  permissions: IPdfPermissions;
  digitalSignature?: IPdfDigitalSignature;
}

// ============================================================================
// METADATA
// ============================================================================

/**
 * PDF metadata
 */
export interface IPdfMetadata {
  title: string;
  subject?: string;
  author?: string;
  creator: string;
  producer: string;
  keywords: string[];
  creationDate: number;
  modificationDate?: number;
  customProperties?: Record<string, string>;
}

// ============================================================================
// COMPLETE CONFIGURATION
// ============================================================================

/**
 * Complete PDF generation configuration
 */
export interface IPdfGenerationConfig {
  templateId?: string;
  useDefaultTemplate: boolean;
  branding: IPdfBranding;
  layout: IPdfLayout;
  header?: IPdfHeaderFooter;
  footer?: IPdfHeaderFooter;
  pageNumbering: IPdfPageNumbering;
  contentOptions: IPdfContentOptions;
  security?: IPdfSecurity;
  metadata: IPdfMetadata;
}

// ============================================================================
// PDF TEMPLATE
// ============================================================================

/**
 * PDF template definition
 */
export interface IPdfTemplate {
  id: string;
  name: string;
  description?: string;
  version: string;
  config: IPdfGenerationConfig;
  allowedContractTypes?: string[];
  organizationId?: string;
  isSystem: boolean;
  createdAt: number;
  createdBy: string;
  lastModifiedAt?: number;
  lastModifiedBy?: string;
}

// ============================================================================
// PDF GENERATION JOB
// ============================================================================

/**
 * PDF generation result
 */
export interface IPdfGenerationResult {
  pdf: plugins.tsclass.business.IPdf;
  pageCount: number;
  fileSize: number;
}

/**
 * PDF generation error
 */
export interface IPdfGenerationError {
  code: string;
  message: string;
  details?: unknown;
}

/**
 * PDF generation job
 */
export interface IPdfGenerationJob {
  id: string;
  contractId: string;
  versionId: string;
  config: IPdfGenerationConfig;
  status: TPdfJobStatus;
  progress?: number;
  queuedAt: number;
  startedAt?: number;
  completedAt?: number;
  result?: IPdfGenerationResult;
  error?: IPdfGenerationError;
  retryCount: number;
  maxRetries: number;
}

// ============================================================================
// FACTORY FUNCTIONS
// ============================================================================

/**
 * Create default branding
 */
export function createDefaultBranding(): IPdfBranding {
  return {
    primaryColor: '#1a1a1a',
    secondaryColor: '#666666',
    textColor: '#333333',
    fonts: {
      heading: {
        family: 'Helvetica',
        fallback: ['Arial', 'sans-serif'],
        size: 14,
        lineHeight: 1.4,
        weight: 'bold',
      },
      body: {
        family: 'Helvetica',
        fallback: ['Arial', 'sans-serif'],
        size: 11,
        lineHeight: 1.5,
      },
    },
  };
}

/**
 * Create default layout
 */
export function createDefaultLayout(): IPdfLayout {
  return {
    pageSize: 'A4',
    orientation: 'portrait',
    margins: {
      top: 25,
      right: 20,
      bottom: 25,
      left: 20,
    },
    columns: 1,
    paragraphSpacing: 10,
    sectionSpacing: 20,
    firstPageDifferent: false,
  };
}

/**
 * Create default content options
 */
export function createDefaultContentOptions(): IPdfContentOptions {
  return {
    tableOfContents: {
      enabled: true,
      depth: 2,
      title: 'Table of Contents',
      pageBreakAfter: true,
    },
    signaturePages: {
      enabled: true,
      signatureBlockStyle: 'inline',
      includeWitnessLines: false,
      includeInitialsOnEachPage: false,
    },
    attachments: {
      includeInline: false,
      includeSeparately: true,
      attachmentToc: true,
    },
    formatting: {
      headingNumbering: true,
      paragraphNumbering: false,
      preserveMarkdownFormatting: true,
      convertLinksToFootnotes: false,
    },
  };
}

/**
 * Create default page numbering
 */
export function createDefaultPageNumbering(): IPdfPageNumbering {
  return {
    enabled: true,
    startFrom: 1,
    format: 'numeric',
    position: 'footer',
    alignment: 'center',
  };
}

/**
 * Create default PDF generation config
 */
export function createDefaultPdfConfig(title: string): IPdfGenerationConfig {
  return {
    useDefaultTemplate: true,
    branding: createDefaultBranding(),
    layout: createDefaultLayout(),
    pageNumbering: createDefaultPageNumbering(),
    contentOptions: createDefaultContentOptions(),
    metadata: {
      title,
      creator: 'signature.digital',
      producer: 'signature.digital PDF Generator',
      keywords: [],
      creationDate: Date.now(),
    },
  };
}