data.js

/* ============================================================
   Sahyog – data.js (API-backed + local fallback)
   Scheme dataset loaded from backend API
   ============================================================ */

// ===================== LOCAL FALLBACK CACHE =====================
// The SCHEMES array is populated from the API on page load.
// If the API is unavailable, the local fallback is used.
let SCHEMES = [];
let _schemesLoaded = false;

// ===================== API CONFIG =====================
const DATA_API_BASE = window.SAHYOG_API || "http://localhost:5000/api";

// ===================== LOAD SCHEMES FROM API =====================
async function loadSchemes() {
  if (_schemesLoaded && SCHEMES.length > 0) return SCHEMES;

  try {
    const res = await fetch(`${DATA_API_BASE}/schemes`);
    if (res.ok) {
      const json = await res.json();
      if (json.success && json.data) {
        SCHEMES = json.data;
        _schemesLoaded = true;
        console.log(`[data] Loaded ${SCHEMES.length} schemes from API`);
        return SCHEMES;
      }
    }
  } catch (err) {
    console.warn("[data] API unavailable, using local fallback:", err.message);
  }

  // Fallback: use hardcoded data if API fails
  if (SCHEMES.length === 0) {
    SCHEMES = getLocalFallbackSchemes();
    _schemesLoaded = true;
    console.log(`[data] Using ${SCHEMES.length} local fallback schemes`);
  }
  return SCHEMES;
}

/** Send eligibility data to backend for server-side scoring */
async function fetchEligibilityResults(profile) {
  try {
    const res = await fetch(`${DATA_API_BASE}/schemes/filter`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(profile),
    });

    if (res.ok) {
      const json = await res.json();
      if (json.success) {
        console.log("[data] Eligibility results from API");
        return json;
      }
    }
  } catch (err) {
    console.warn("[data] API eligibility check failed, using client-side:", err.message);
  }

  // Fallback: use client-side scoring from app.js
  return null;
}

/** Fetch a single scheme from API */
async function fetchSchemeById(id) {
  try {
    const res = await fetch(`${DATA_API_BASE}/schemes/${id}`);
    if (res.ok) {
      const json = await res.json();
      if (json.success) return json.data;
    }
  } catch (err) {
    console.warn("[data] API scheme fetch failed, using local:", err.message);
  }

  // Fallback: search local cache
  await loadSchemes();
  return SCHEMES.find(s => s.id === parseInt(id)) || null;
}

// ===================== CATEGORIES =====================
const CATEGORIES = {
  housing:     { label: "Housing",     emoji: "🏠", color: "#4f46e5", bg: "#eef2ff" },
  health:      { label: "Health",      emoji: "🏥", color: "#059669", bg: "#ecfdf5" },
  education:   { label: "Education",   emoji: "🎓", color: "#2563eb", bg: "#eff6ff" },
  agriculture: { label: "Agriculture", emoji: "🌾", color: "#16a34a", bg: "#f0fdf4" },
  finance:     { label: "Finance",     emoji: "💰", color: "#ca8a04", bg: "#fefce8" },
  women:       { label: "Women",       emoji: "👩", color: "#db2777", bg: "#fdf2f8" },
  pension:     { label: "Pension",     emoji: "🧓", color: "#9333ea", bg: "#faf5ff" },
  energy:      { label: "Energy",      emoji: "🔥", color: "#ea580c", bg: "#fff7ed" },
  employment:  { label: "Employment",  emoji: "💼", color: "#0284c7", bg: "#f0f9ff" },
  insurance:   { label: "Insurance",   emoji: "🛡️", color: "#7c3aed", bg: "#f5f3ff" }
};

const STATES = [
  "Andhra Pradesh", "Assam", "Bihar", "Chhattisgarh", "Delhi", "Goa", "Gujarat",
  "Haryana", "Himachal Pradesh", "Jharkhand", "Karnataka", "Kerala", "Madhya Pradesh",
  "Maharashtra", "Odisha", "Punjab", "Rajasthan", "Tamil Nadu", "Telangana",
  "Uttar Pradesh", "Uttarakhand", "West Bengal"
];

// Helper: get scheme by ID from local cache
function getSchemeById(id) {
  return SCHEMES.find(s => s.id === parseInt(id));
}

// Helper: capitalize
function capitalize(str) {
  if (!str) return "";
  return str.charAt(0).toUpperCase() + str.slice(1).replace(/-/g, " ");
}

// ===================== LOCAL FALLBACK DATA =====================
// Minimal inline fallback so the site works without the backend
function getLocalFallbackSchemes() {
  return [
    { id:1, name:"Pradhan Mantri Awas Yojana (PMAY)", category:"housing", icon:"🏠", shortDesc:"Affordable housing for all – providing financial assistance for construction or purchase of a pucca house.", benefits:["Subsidy of up to ₹2.67 lakh on home loan interest","Financial assistance up to ₹1.5 lakh for house construction","Special provisions for women-headed households","Coverage in both urban and rural areas"], eligibility:{incomeMax:1800000,ageMin:18,ageMax:70,gender:"all",category:["ews","obc","sc","st","general"],occupation:"all",residence:["urban","rural","semi-urban"],description:"Indian citizen, does not own a pucca house, household income below ₹18 lakh per annum."}, requiredDocuments:["Aadhaar Card","Income Certificate","Address Proof","Bank Account Details","Property Document (if applicable)","Photograph"], tags:["housing","bpl","women","rural"], applicationSteps:["Visit CSC or municipal office","Fill PMAY application form","Submit documents","Verified by authorities","Subsidy credited to bank"] },
    { id:2, name:"PM Kisan Samman Nidhi Yojana", category:"agriculture", icon:"🌾", shortDesc:"Income support of ₹6,000 per year to small and marginal farmers.", benefits:["₹6,000/year in three installments","Direct benefit transfer","No middleman","Covers farming costs"], eligibility:{incomeMax:500000,ageMin:18,ageMax:100,gender:"all",category:["general","obc","sc","st","ews"],occupation:["farmer"],residence:["rural","semi-urban"],description:"Small and marginal farmers with cultivable land up to 2 hectares."}, requiredDocuments:["Aadhaar Card","Land Records","Bank Account","Mobile Number","Domicile Certificate"], tags:["farmer","rural","bpl"], applicationSteps:["Visit pmkisan.gov.in","Register as new farmer","Enter Aadhaar + state","Fill details","Submit"] },
    { id:3, name:"Ayushman Bharat – PMJAY", category:"health", icon:"🏥", shortDesc:"Health coverage of ₹5 lakh per family per year.", benefits:["₹5 lakh coverage","1,393+ procedures","Free treatment","Cashless"], eligibility:{incomeMax:300000,ageMin:0,ageMax:120,gender:"all",category:["sc","st","obc","ews"],occupation:"all",residence:["urban","rural","semi-urban"],description:"BPL families and vulnerable categories."}, requiredDocuments:["Aadhaar Card","Ration Card","Income Certificate","Family ID","Mobile Number"], tags:["health","bpl","sc-st","women","senior"], applicationSteps:["Check on mera.pmjay.gov.in","Visit Ayushman Kendra","Submit documents","Get Ayushman Card","Visit empaneled hospital"] },
    { id:5, name:"PM Mudra Yojana (PMMY)", category:"finance", icon:"💼", shortDesc:"Collateral-free loans up to ₹10 lakh for small businesses.", benefits:["Shishu up to ₹50K","Kishore up to ₹5L","Tarun up to ₹10L","No collateral","Low interest"], eligibility:{incomeMax:1000000,ageMin:18,ageMax:65,gender:"all",category:["general","obc","sc","st","ews"],occupation:["self-employed","business","daily-wage"],residence:["urban","rural","semi-urban"],description:"Small/micro enterprises."}, requiredDocuments:["Aadhaar","PAN","Business Plan","Address Proof","Bank Statements","Photo"], tags:["women","sc-st"], applicationSteps:["Visit bank/NBFC","Fill Mudra form","Submit documents","Bank evaluates","Loan disbursed"] },
    { id:7, name:"PM Scholarship Scheme (PMSS)", category:"education", icon:"🎓", shortDesc:"Scholarships for ex-servicemen's children.", benefits:["₹3,000/month","1-5 years","Professional courses","Direct credit"], eligibility:{incomeMax:600000,ageMin:17,ageMax:25,gender:"all",category:["general","obc","sc","st","ews"],occupation:["student"],residence:["urban","rural","semi-urban"],description:"Wards of ex-servicemen pursuing professional courses."}, requiredDocuments:["Aadhaar","Marksheets","Admission Letter","Bank Details","ESM Certificate","Income Certificate"], tags:["student"], applicationSteps:["Visit KSB portal","Register online","Upload documents","Verified by ZSB","Credited to bank"] },
    { id:14, name:"Senior Citizen Savings Scheme (SCSS)", category:"pension", icon:"🏦", shortDesc:"Guaranteed returns for senior citizens at 8.2% p.a.", benefits:["8.2% interest","Quarterly payout","Up to ₹30L","Tax benefits","5-year tenure"], eligibility:{incomeMax:99999999,ageMin:60,ageMax:120,gender:"all",category:["general","obc","sc","st","ews"],occupation:"all",residence:["urban","rural","semi-urban"],description:"Indian citizen aged 60+."}, requiredDocuments:["Aadhaar","PAN","Age Proof","Bank Details","Photo","Retirement Proof"], tags:["senior"], applicationSteps:["Visit post office/bank","Fill SCSS form","Submit documents","Invest by cheque","Get SCSS passbook"] }
  ];
}