/**
 * Fetch AI greetings from api.usj.cc and write to static JS file.
 * Usage: node scripts/fetch_greetings.js
 * Env: RSS_API_TOKEN (same token used for RSS/links)
 */

const fs = require("fs");
const path = require("path");

const API_BASE = "https://api.usj.cc/api/ai/greeting";
let TOKEN = process.env.RSS_API_TOKEN;

// Fallback: read from write/.env
if (!TOKEN) {
    try {
        const envPath = path.join(__dirname, "..", "write", ".env");
        const envContent = fs.readFileSync(envPath, "utf-8");
        const match = envContent.match(/^RSS_API_TOKEN=(.+)$/m);
        if (match) TOKEN = match[1].trim();
    } catch {}
}

if (!TOKEN) {
    console.error("RSS_API_TOKEN env var is required (or write/.env with RSS_API_TOKEN=xxx)");
    process.exit(1);
}

async function main() {
    const url = `${API_BASE}?token=${encodeURIComponent(TOKEN)}`;
    const res = await fetch(url);
    if (!res.ok) {
        const body = await res.text();
        throw new Error(`API returned ${res.status}: ${body}`);
    }
    const data = await res.json();
    const greetings = data.greetings || [];

    const byTime = { morning: [], noon: [], afternoon: [], evening: [], night: [] };
    const holidays = {};
    const generic = [];
    const timeKeys = Object.keys(byTime);

    greetings.forEach((g) => {
        if (g.holiday) {
            holidays[g.holiday] = g.text;
            return;
        }
        var t = g.time || "";
        // Normalize: strip "weekday-"/"weekend-" prefix, lowercase
        var bucket = t.replace(/^(weekday|weekend)-/, "").toLowerCase();
        if (byTime[bucket]) {
            byTime[bucket].push(g.text);
        } else if (t === "weekend") {
            // "weekend" without a specific time → add to all slots
            timeKeys.forEach(function(k) { byTime[k].push(g.text); });
        } else {
            generic.push(g.text);
        }
    });

    // Keep all greetings per time slot (frontend picks randomly)
    var timeGreetings = {};
    timeKeys.forEach(function(key) {
        var list = byTime[key];
        if (list.length === 0) list = generic;
        if (list.length > 0) {
            timeGreetings[key] = list;
        }
    });

    const js =
        "window.searchGreetings=" +
        JSON.stringify(timeGreetings) +
        ";window.searchHolidays=" +
        JSON.stringify(holidays) +
        ";";

    const outDir = path.join(__dirname, "..", "static", "js");
    fs.mkdirSync(outDir, { recursive: true });
    const outPath = path.join(outDir, "ai_greetings.js");
    fs.writeFileSync(outPath, js, "utf-8");

    console.log(
        `Wrote ${Object.keys(timeGreetings).length} time slots, ${Object.keys(holidays).length} holidays → ${outPath}`
    );
}

main().catch((e) => {
    console.error("Failed to fetch AI greetings:", e.message);
    process.exit(1);
});