from fpdf import FPDF

class DeploymentReport(FPDF):
    def header(self):
        self.set_fill_color(20, 40, 80)  # Navy Blue
        self.rect(0, 0, 210, 40, 'F')
        self.set_text_color(255, 255, 255)
        self.set_font('Arial', 'B', 16)
        self.cell(0, 20, 'Deployment Analysis Report', ln=True, align='C')
        self.set_font('Arial', '', 12)
        self.cell(0, 10, 'Tillo - Canteen Automation Ecosystem', ln=True, align='C')
        self.ln(20)

    def footer(self):
        self.set_y(-15)
        self.set_font('Arial', 'I', 8)
        self.set_text_color(128, 128, 128)
        self.cell(0, 10, f'Page {self.page_no()} | Generated by Claude Code', align='C')

    def section_title(self, title):
        self.ln(5)
        self.set_font('Arial', 'B', 14)
        self.set_text_color(20, 40, 80)
        self.cell(0, 10, title, ln=True)
        self.ln(2)
        self.set_draw_color(20, 40, 80)
        self.line(self.get_x(), self.get_y(), self.get_x() + 190, self.get_y())
        self.ln(5)

    def section_body(self, text):
        self.set_font('Arial', '', 11)
        self.set_text_color(0, 0, 0)
        self.multi_cell(0, 7, text)
        self.ln(3)

    def create_table(self, header, data):
        self.ln(5)
        self.set_font('Arial', 'B', 10)
        self.set_fill_color(230, 230, 230)

        col_width = 190 / len(header)
        for i, h in enumerate(header):
            self.cell(col_width, 10, h, 1, 0, 'C', fill=True)
        self.ln()

        self.set_font('Arial', '', 9)
        for row in data:
            for item in row:
                self.cell(col_width, 10, str(item), 1)
            self.ln()
        self.ln(5)

pdf = DeploymentReport()
pdf.add_page()

# Section 1: Infrastructure Analysis
pdf.section_title("1. Infrastructure Analysis & Resource Requirements")
infra_text = (
    "The system follows a Hub-and-Spoke architecture with a central Java backend and three React frontends.\n\n"
    "Backend (Java 17 / Spring Boot):\n"
    "- CPU: 4 vCPUs recommended for high-concurrency request processing.\n"
    "- RAM: 8GB RAM is the critical baseline to avoid Out-Of-Memory (OOM) crashes during peak hours.\n\n"
    "Database (PostgreSQL):\n"
    "- High-performance NVMe SSD is essential to prevent I/O bottlenecks, especially during daily archival tasks.\n"
    "- Recommended: 2 vCPUs / 4GB RAM.\n\n"
    "Frontends (React/Vite):\n"
    "- Purely static assets; should be served via a Global CDN for low latency."
)
pdf.section_body(infra_text)

# Section 2: Deployment Options
pdf.section_title("2. Deployment Options")

pdf.set_font('Arial', 'B', 12)
pdf.cell(0, 10, "Option A: The Managed Powerhouse (GCP/AWS)", ln=True)
pdf.section_body("Best for Enterprise reliability and automatic scaling. Use Cloud Run/Fargate for Backend, Managed SQL for DB, and S3/CloudFront for Frontends. Pros: Highest reliability. Cons: Highest cost.")

pdf.set_font('Arial', 'B', 12)
pdf.cell(0, 10, "Option B: The Developer's Balance (DigitalOcean/Railway)", ln=True)
pdf.section_body("Recommended. Best balance of cost, ease of use, and stability. Use Premium Droplets (4vCPU/8GB) and Managed PostgreSQL. Frontends on Vercel/Netlify. Pros: Predictable pricing, fast setup.")

pdf.set_font('Arial', 'B', 12)
pdf.cell(0, 10, "Option C: The Budget Optimizer (Hetzner/OVH)", ln=True)
pdf.section_body("Best for minimum cost. Single powerful VPS hosting both API and DB via Docker Compose. Frontends on Cloudflare Pages. Pros: Lowest cost. Cons: High maintenance burden.")

# Section 3: Comparison Matrix
pdf.section_title("3. Comparison Matrix")
header = ["Dimension", "Option A", "Option B", "Option C"]
data = [
    ["Monthly Cost", "High (~$150+)", "Medium (~$60-90)", "Low (~$20-40)"],
    ["Setup Effort", "Medium", "Low", "High"],
    ["Scalability", "Automatic", "Manual/Vertical", "Manual/Vertical"],
    ["Reliability", "99.99%", "99.9%", "Moderate"],
    ["Maintenance", "Near Zero", "Low", "High"]
]
pdf.create_table(header, data)

# Section 4: Operational Strategy
pdf.section_title("4. Operational Strategy")
ops_text = (
    "CI/CD Flow: GitHub Actions -> Maven/Vite Build -> Docker Image -> Rolling Update.\n\n"
    "Security:\n"
    "- Secret Management: Use environment variable managers; never commit .env files.\n"
    "- CORS Strategy: Set APP_CORS_ORIGINS to allow only the three specific production frontend domains.\n"
    "- Backups: Automated daily snapshots via managed database providers.\n\n"
    "Monitoring: Implement Spring Boot Actuator to monitor JVM heap and thread counts in real-time."
)
pdf.section_body(ops_text)

pdf.output("Deployment_Report_Tillo.pdf")