#!/usr/bin/env node

/**
 * Cover Letter Generator Template
 *
 * This script provides a template for generating professional cover letters
 * using the docx library with proper formatting and structure.
 *
 * Usage: Customize the content sections below with job-specific information
 */

const { Document, Packer, Paragraph, TextRun, AlignmentType } = require('docx');
const fs = require('fs');

// Configuration
const OUTPUT_FILE = 'Collins_Robin_Cover_Letter.docx';
const APPLICANT_NAME = 'Robin Collins';
const APPLICANT_EMAIL = 'robin.f.collins@outlook.com';
const APPLICANT_PHONE = '0475 795 732';

// Job-specific configuration - CUSTOMIZE THESE
const POSITION_TITLE = '[Position Title]';
const COMPANY_NAME = '[Company Name]';
const HIRING_MANAGER = '[Hiring Manager Name or "Hiring Manager"]';
const DATE = new Date().toLocaleDateString('en-AU', { year: 'numeric', month: 'long', day: 'numeric' });

/**
 * Content sections - CUSTOMIZE WITH JOB-SPECIFIC CONTENT
 */
const OPENING_PARAGRAPH = `Dear ${HIRING_MANAGER},

I am writing to express my strong interest in the ${POSITION_TITLE} position at ${COMPANY_NAME}. [Add 1-2 sentences about your unique value proposition and why you're an excellent fit for this specific role.]`;

const BODY_PARAGRAPH_1 = `[Address first key selection criterion or requirement. Lead with the criterion, provide specific evidence from your experience with quantifiable results, and connect to the organizational need.]`;

const BODY_PARAGRAPH_2 = `[Address second key selection criterion. Include specific achievements, metrics, and demonstrate how your experience directly applies to role requirements.]`;

const BODY_PARAGRAPH_3 = `[Optional: Address additional selection criteria or provide compelling examples that differentiate you as a candidate.]`;

const CLOSING_PARAGRAPH = `I am excited about the opportunity to bring my [key skills/experience] to ${COMPANY_NAME} and contribute to [specific organizational goal or initiative]. I would welcome the opportunity to discuss how my background aligns with your needs in greater detail. Thank you for considering my application.

Sincerely,
${APPLICANT_NAME}
${APPLICANT_EMAIL}
${APPLICANT_PHONE}`;

/**
 * Style definitions
 */
const styles = {
  default: {
    document: {
      run: { font: 'Calibri', size: 22 } // 11pt
    }
  },
  paragraphStyles: [
    {
      id: 'Header',
      name: 'Header',
      basedOn: 'Normal',
      run: { font: 'Calibri', size: 22, bold: true },
      paragraph: { spacing: { after: 120 }, alignment: AlignmentType.LEFT }
    },
    {
      id: 'Body',
      name: 'Body',
      basedOn: 'Normal',
      run: { font: 'Calibri', size: 22 },
      paragraph: { spacing: { after: 240, line: 360 }, alignment: AlignmentType.LEFT }
    },
    {
      id: 'Closing',
      name: 'Closing',
      basedOn: 'Normal',
      run: { font: 'Calibri', size: 22 },
      paragraph: { spacing: { before: 240, after: 120 }, alignment: AlignmentType.LEFT }
    }
  ]
};

/**
 * Generate cover letter document
 */
function generateCoverLetter() {
  const doc = new Document({
    styles: styles,
    sections: [{
      properties: {
        page: {
          margin: { top: 1440, right: 1440, bottom: 1440, left: 1440 } // 1 inch margins
        }
      },
      children: [
        // Header with contact info
        new Paragraph({
          style: 'Header',
          children: [new TextRun(APPLICANT_NAME)]
        }),
        new Paragraph({
          children: [
            new TextRun(`${APPLICANT_EMAIL} | ${APPLICANT_PHONE}`)
          ],
          spacing: { after: 240 }
        }),

        // Date
        new Paragraph({
          children: [new TextRun(DATE)],
          spacing: { after: 240 }
        }),

        // Opening
        new Paragraph({
          style: 'Body',
          children: [new TextRun(OPENING_PARAGRAPH)]
        }),

        // Body paragraphs
        new Paragraph({
          style: 'Body',
          children: [new TextRun(BODY_PARAGRAPH_1)]
        }),

        new Paragraph({
          style: 'Body',
          children: [new TextRun(BODY_PARAGRAPH_2)]
        }),

        // Optional third body paragraph (comment out if not needed)
        new Paragraph({
          style: 'Body',
          children: [new TextRun(BODY_PARAGRAPH_3)]
        }),

        // Closing
        new Paragraph({
          style: 'Closing',
          children: [new TextRun(CLOSING_PARAGRAPH)]
        })
      ]
    }]
  });

  return doc;
}

/**
 * Save document to file
 */
async function main() {
  try {
    const doc = generateCoverLetter();
    const buffer = await Packer.toBuffer(doc);
    fs.writeFileSync(OUTPUT_FILE, buffer);
    console.log(`✅ Cover letter created successfully: ${OUTPUT_FILE}`);
  } catch (error) {
    console.error('❌ Error generating cover letter:', error);
    process.exit(1);
  }
}

// Run if called directly
if (require.main === module) {
  main();
}

module.exports = { generateCoverLetter };