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

// ============================================
// CONFIGURATION - Modify these paths as needed
// ============================================
const INPUT_FILE = './resume.json';
const OUTPUT_FILE = `./Phillip_Tarrant_Resume_${new Date().getFullYear()}.docx`;

// Load resume data
const resumeData = JSON.parse(fs.readFileSync(INPUT_FILE, 'utf8'));

// ============================================
// HELPER FUNCTIONS
// ============================================

// Create a bullet point paragraph
function createBulletParagraph(text, reference) {
  return new Paragraph({
    numbering: { reference: reference, level: 0 },
    spacing: { after: 60 },
    children: [new TextRun({ text: text, size: 22, font: "Arial" })]
  });
}

// Format date from YYYY-MM to "Mon YYYY"
function formatDate(dateStr) {
  if (!dateStr) return '';
  const date = new Date(dateStr + '-01');
  return date.toLocaleDateString('en-US', { month: 'short', year: 'numeric' });
}

// ============================================
// BUILD DOCUMENT CONTENT
// ============================================
const children = [];

// --- HEADER SECTION ---

// Name - centered, bold, larger
children.push(new Paragraph({
  alignment: AlignmentType.CENTER,
  spacing: { after: 80 },
  children: [new TextRun({
    text: resumeData.basics.name,
    bold: true,
    size: 32,  // 16pt
    font: "Arial"
  })]
}));

// Title/Label - centered
children.push(new Paragraph({
  alignment: AlignmentType.CENTER,
  spacing: { after: 80 },
  children: [new TextRun({
    text: resumeData.basics.label,
    size: 24,  // 12pt
    font: "Arial"
  })]
}));

// Contact line 1: email • phone
children.push(new Paragraph({
  alignment: AlignmentType.CENTER,
  spacing: { after: 40 },
  children: [new TextRun({
    text: `${resumeData.basics.email} • ${resumeData.basics.phone}`,
    size: 22,  // 11pt
    font: "Arial"
  })]
}));

// Contact line 2: LinkedIn • Location
const location = `${resumeData.basics.location.city}, ${resumeData.basics.location.region}`;
children.push(new Paragraph({
  alignment: AlignmentType.CENTER,
  spacing: { after: 200 },
  children: [
    new ExternalHyperlink({
      link: resumeData.basics.url,
      children: [new TextRun({
        text: resumeData.basics.url.replace('https://', ''),
        style: "Hyperlink",
        size: 22,
        font: "Arial"
      })]
    }),
    new TextRun({
      text: ` • ${location}`,
      size: 22,
      font: "Arial"
    })
  ]
}));

// --- SUMMARY SECTION ---
children.push(new Paragraph({
  spacing: { after: 240 },
  children: [new TextRun({
    text: resumeData.basics.summary,
    size: 22,
    font: "Arial"
  })]
}));

// --- CAREER EXPERIENCE SECTION ---
children.push(new Paragraph({
  spacing: { before: 120, after: 200 },
  children: [new TextRun({
    text: "Career Experience",
    bold: true,
    size: 26,  // 13pt
    font: "Arial"
  })]
}));

// Work experience entries
resumeData.work.forEach((job, index) => {
  const startDate = formatDate(job.startDate);
  const endDate = job.endDate ? formatDate(job.endDate) : 'Present';
  const dateRange = `${startDate} – ${endDate}`;
  
  const companyLine = job.location ? `${job.name}, ${job.location}` : job.name;
  
  // Job title and company
  children.push(new Paragraph({
    spacing: { before: 160, after: 60 },
    children: [
      new TextRun({
        text: job.position,
        bold: true,
        size: 22,
        font: "Arial"
      }),
      new TextRun({
        text: `\n${companyLine}`,
        size: 22,
        font: "Arial"
      }),
      new TextRun({
        text: `  ${dateRange}`,
        size: 22,
        font: "Arial",
        italics: true
      })
    ]
  }));
  
  // Job summary
  if (job.summary) {
    children.push(new Paragraph({
      spacing: { after: 100 },
      children: [new TextRun({
        text: job.summary,
        size: 22,
        font: "Arial"
      })]
    }));
  }
  
  // Highlights as bullet points
  if (job.highlights && job.highlights.length > 0) {
    job.highlights.forEach(highlight => {
      children.push(createBulletParagraph(highlight, "bullets"));
    });
  }
  
  // Spacing after each job
  children.push(new Paragraph({ spacing: { after: 120 }, children: [] }));
});

// --- EDUCATION, CERTIFICATIONS, AND AWARDS SECTION ---
children.push(new Paragraph({
  spacing: { before: 200, after: 160 },
  children: [new TextRun({
    text: "Education, Certifications, and Awards",
    bold: true,
    size: 26,
    font: "Arial"
  })]
}));

// Certificates
if (resumeData.certificates) {
  resumeData.certificates.forEach(cert => {
    const year = cert.date ? new Date(cert.date).getFullYear() : '';
    children.push(new Paragraph({
      spacing: { after: 60 },
      children: [
        new TextRun({
          text: cert.name,
          bold: true,
          size: 22,
          font: "Arial"
        }),
        new TextRun({
          text: `, ${cert.issuer}`,
          size: 22,
          font: "Arial"
        }),
        new TextRun({
          text: year ? `, ${year}` : '',
          size: 22,
          font: "Arial"
        })
      ]
    }));
  });
}

// Awards
if (resumeData.awards) {
  resumeData.awards.forEach(award => {
    const year = award.date ? new Date(award.date).getFullYear() : '';
    children.push(new Paragraph({
      spacing: { after: 60 },
      children: [
        new TextRun({
          text: award.title,
          bold: true,
          size: 22,
          font: "Arial"
        }),
        new TextRun({
          text: `, ${award.awarder}`,
          size: 22,
          font: "Arial"
        }),
        new TextRun({
          text: year ? `, ${year}` : '',
          size: 22,
          font: "Arial"
        })
      ]
    }));
    if (award.summary) {
      children.push(new Paragraph({
        spacing: { after: 60 },
        indent: { left: 360 },
        children: [new TextRun({
          text: award.summary,
          size: 22,
          font: "Arial",
          italics: true
        })]
      }));
    }
  });
}

// Education
if (resumeData.education) {
  resumeData.education.forEach(edu => {
    const dateRange = edu.startDate && edu.endDate ? `${edu.startDate} – ${edu.endDate}` : '';
    children.push(new Paragraph({
      spacing: { after: 60 },
      children: [
        new TextRun({
          text: `${edu.studyType} in ${edu.area}`,
          bold: true,
          size: 22,
          font: "Arial"
        }),
        new TextRun({
          text: `, ${edu.institution}`,
          size: 22,
          font: "Arial"
        }),
        new TextRun({
          text: dateRange ? `, ${dateRange}` : '',
          size: 22,
          font: "Arial"
        })
      ]
    }));
    if (edu.score) {
      children.push(new Paragraph({
        spacing: { after: 60 },
        indent: { left: 360 },
        children: [new TextRun({
          text: `GPA: ${edu.score}`,
          size: 22,
          font: "Arial",
          italics: true
        })]
      }));
    }
  });
}

// --- TECHNICAL SKILLS SECTION ---
children.push(new Paragraph({
  spacing: { before: 200, after: 160 },
  children: [new TextRun({
    text: "Technical Skills",
    bold: true,
    size: 26,
    font: "Arial"
  })]
}));

if (resumeData.skills) {
  resumeData.skills.forEach(skillCategory => {
    children.push(new Paragraph({
      spacing: { after: 60 },
      children: [
        new TextRun({
          text: `${skillCategory.name}: `,
          bold: true,
          size: 22,
          font: "Arial"
        }),
        new TextRun({
          text: skillCategory.keywords.join(", "),
          size: 22,
          font: "Arial"
        })
      ]
    }));
  });
}

// ============================================
// CREATE AND SAVE DOCUMENT
// ============================================
const doc = new Document({
  styles: {
    default: {
      document: {
        run: { font: "Arial", size: 22 }
      }
    }
  },
  numbering: {
    config: [
      {
        reference: "bullets",
        levels: [{
          level: 0,
          format: LevelFormat.BULLET,
          text: "•",
          alignment: AlignmentType.LEFT,
          style: {
            paragraph: {
              indent: { left: 720, hanging: 360 }
            }
          }
        }]
      }
    ]
  },
  sections: [{
    properties: {
      page: {
        size: {
          width: 12240,  // 8.5 inches (1440 DXA = 1 inch)
          height: 15840  // 11 inches
        },
        margin: {
          top: 720,     // 0.5 inch
          right: 1080,  // 0.75 inch
          bottom: 720,  // 0.5 inch
          left: 1080    // 0.75 inch
        }
      }
    },
    children: children
  }]
});

// Save the document
Packer.toBuffer(doc).then(buffer => {
  fs.writeFileSync(OUTPUT_FILE, buffer);
  console.log(`Resume created successfully: ${OUTPUT_FILE}`);
}).catch(err => {
  console.error('Error creating document:', err);
  process.exit(1);
});