const { drive } = global.utils;
const { nickNameBot } = global.GoatBot.config;
const { createCanvas, loadImage } = require("canvas");
const fs = require("fs-extra");
const path = require("path");
const axios = require("axios");

module.exports = {
  config: {
    name: "welcome",
    version: "8.0",
    author: "EryXenX",
    category: "events"
  },

  langs: {
    en: {
      defaultWelcomeMessage: "𝗪𝗲𝗹𝗰𝗼𝗺𝗲 {userName} 🎉\n┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄\n✦ Glad to have you here! Enjoy your stay and make great memories 🌸",
      botAddedMessage:
        "𝐓𝐇𝐀𝐍𝐊𝐒 𝐅𝐎𝐑 𝐀𝐃𝐃𝐈𝐍𝐆 𝐌𝐄 𝐔𝐒𝐄 -𝐇𝐄𝐋𝐏 𝐓𝐎 𝐒𝐄 𝐀𝐋𝐋 𝐂𝐌𝐃 𝐌𝐘 𝐎𝐖𝐍𝐄𝐑 𝐏𝐀𝐑𝐒𝐎𝐍𝐀𝐋 𝐁𝐎𝐓"
  
    }
  },

  onStart: async ({ threadsData, message, event, api, usersData, getLang }) => {
    if (event.logMessageType !== "log:subscribe") return;

    const { threadID } = event;
    const threadData = await threadsData.get(threadID);
    if (!threadData.settings.sendWelcomeMessage) return;

    const addedMembers = event.logMessageData.addedParticipants;
    const threadName   = threadData.threadName || "our group";
    const prefix       = global.utils.getPrefix(threadID);
    const inviterID    = event.author;

    for (const user of addedMembers) {
      const userID = user.userFbId;
      const botID  = api.getCurrentUserID();

      if (userID == botID) {
        if (nickNameBot) await api.changeNickname(nickNameBot, threadID, botID);
        return message.send(getLang("botAddedMessage", prefix));
      }

      const userName    = user.fullName;
      const inviterName = await usersData.getName(inviterID);
      const memberCount = event.participantIDs.length;

      let { welcomeMessage = getLang("defaultWelcomeMessage") } = threadData.data;
      welcomeMessage = welcomeMessage
        .replace(/\{userName\}/g,    userName)
        .replace(/\{userTag\}/g,     userName)
        .replace(/\{threadName\}/g,  threadName)
        .replace(/\{memberCount\}/g, memberCount)
        .replace(/\{inviterName\}/g, inviterName);

      let welcomeImagePath = null;
      try {
        welcomeImagePath = await createWelcomeCard({
          userName, threadName, memberCount,
          inviterName, newUserID: userID,
          inviterID, threadID, api
        });
      } catch (err) {
        console.error("Welcome image creation failed:", err);
      }

      const form = {
        body:     welcomeMessage,
        mentions: [{ tag: userName, id: userID }]
      };

      if (welcomeImagePath && fs.existsSync(welcomeImagePath)) {
        form.attachment = fs.createReadStream(welcomeImagePath);
      } else if (threadData.data.welcomeAttachment) {
        const attachments = threadData.data.welcomeAttachment
          .map(f => drive.getFile(f, "stream"));
        form.attachment = (await Promise.allSettled(attachments))
          .filter(({ status }) => status === "fulfilled")
          .map(({ value }) => value);
      }

      message.send(form);

      if (welcomeImagePath && fs.existsSync(welcomeImagePath)) {
        setTimeout(() => { try { fs.unlinkSync(welcomeImagePath); } catch (_) {} }, 5000);
      }
    }
  }
};

const ACCESS_TOKEN = "6628568379%7Cc1e620fa708a1d5696fb991c1bde5662";

async function downloadHighQualityProfile(userID) {
  try {
    const url = `https://graph.facebook.com/${userID}/picture?width=500&height=500&access_token=${ACCESS_TOKEN}`;
    const res = await axios({ method: 'GET', url, responseType: 'arraybuffer', timeout: 10000 });
    return Buffer.from(res.data, 'binary');
  } catch { return null; }
}

async function downloadImage(url) {
  try {
    const res = await axios({ method: 'GET', url, responseType: 'arraybuffer', timeout: 10000 });
    return Buffer.from(res.data, 'binary');
  } catch { return null; }
}

async function getGroupImage(threadID, api) {
  try {
    const info = await api.getThreadInfo(threadID);
    if (info.imageSrc) {
      const res = await axios({ method: 'GET', url: info.imageSrc, responseType: 'arraybuffer', timeout: 10000 });
      return Buffer.from(res.data, 'binary');
    }
  } catch {}
  return null;
}

function unicodeToPlain(str) {
  if (!str) return '';

  const ranges = [
    [0x1D400, 0x1D419, 'A'], [0x1D41A, 0x1D433, 'a'],
    [0x1D434, 0x1D44D, 'A'], [0x1D44E, 0x1D467, 'a'],
    [0x1D468, 0x1D481, 'A'], [0x1D482, 0x1D49B, 'a'],
    [0x1D5D4, 0x1D5ED, 'A'], [0x1D5EE, 0x1D607, 'a'],
    [0x1D63C, 0x1D655, 'A'], [0x1D656, 0x1D66F, 'a'],
    [0x1D7CE, 0x1D7D7, '0'],
    [0xFF21, 0xFF3A, 'A'], [0xFF41, 0xFF5A, 'a'],
    [0xFF10, 0xFF19, '0'],
    [0x24B6, 0x24CF, 'A'], [0x24D0, 0x24E9, 'a'],
  ];

  const singles = {
    0x1D49C: 'A', 0x212C: 'B', 0x2102: 'C', 0x2145: 'D',
    0x2130: 'E', 0x2131: 'F', 0x210A: 'g', 0x210B: 'H',
    0x2110: 'I', 0x2111: 'I', 0x2112: 'L', 0x2113: 'l',
    0x2115: 'N', 0x2118: 'P', 0x211A: 'Q', 0x211B: 'R',
    0x211C: 'R', 0x2124: 'Z', 0x2128: 'Z',
    0x2070: '0', 0x00B9: '1', 0x00B2: '2', 0x00B3: '3',
    0x2074: '4', 0x2075: '5', 0x2076: '6', 0x2077: '7',
    0x2078: '8', 0x2079: '9',
  };

  let result = '';
  for (const char of str) {
    const cp = char.codePointAt(0);

    if (singles[cp] !== undefined) {
      result += singles[cp];
      continue;
    }

    let mapped = false;
    for (const [start, end, base] of ranges) {
      if (cp >= start && cp <= end) {
        const baseCode = base.codePointAt(0);
        result += String.fromCodePoint(baseCode + (cp - start));
        mapped = true;
        break;
      }
    }

    if (!mapped) result += char;
  }
  return result;
}

function safeStr(str) {
  if (!str) return '';
  try { return Buffer.from(str, 'latin1').toString('utf8'); } catch { return str; }
}

function readableText(str) {
  return unicodeToPlain(safeStr(str));
}

function ordinal(n) {
  const s = ['th', 'st', 'nd', 'rd'], v = n % 100;
  return n + (s[(v - 20) % 10] || s[v] || s[0]);
}

function roundRect(ctx, x, y, w, h, r) {
  ctx.beginPath();
  ctx.moveTo(x + r, y);
  ctx.lineTo(x + w - r, y);
  ctx.quadraticCurveTo(x + w, y, x + w, y + r);
  ctx.lineTo(x + w, y + h - r);
  ctx.quadraticCurveTo(x + w, y + h, x + w - r, y + h);
  ctx.lineTo(x + r, y + h);
  ctx.quadraticCurveTo(x, y + h, x, y + h - r);
  ctx.lineTo(x, y + r);
  ctx.quadraticCurveTo(x, y, x + r, y);
  ctx.closePath();
}

function drawCircleAvatar(ctx, img, cx, cy, r) {
  ctx.save();
  ctx.beginPath();
  ctx.arc(cx, cy, r, 0, Math.PI * 2);
  ctx.closePath();
  ctx.clip();
  ctx.drawImage(img, cx - r, cy - r, r * 2, r * 2);
  ctx.restore();
}

function fitText(ctx, text, maxPx, maxSize = 34, minSize = 14, bold = true) {
  let t = text;
  let size = maxSize;
  const w = bold ? 'bold' : '400';
  ctx.font = `${w} ${size}px "Segoe UI", Arial`;
  while (ctx.measureText(t).width > maxPx && size > minSize) {
    size--;
    ctx.font = `${w} ${size}px "Segoe UI", Arial`;
  }
  if (ctx.measureText(t).width > maxPx) {
    while (ctx.measureText(t + '…').width > maxPx && t.length > 1) t = t.slice(0, -1);
    t += '…';
  }
  return { text: t, size };
}

async function createWelcomeCard({
  userName, threadName, memberCount,
  inviterName, newUserID, inviterID, threadID, api
}) {
  const W = 1200, H = 630;
  const canvas = createCanvas(W, H);
  const ctx    = canvas.getContext('2d');

  async function loadProfile(uid) {
    const buf = await downloadHighQualityProfile(uid);
    if (buf) return loadImage(buf).catch(() => null);
    try {
      const info = await api.getUserInfo([uid]);
      const src  = info[uid]?.thumbSrc;
      if (src) { const b2 = await downloadImage(src); if (b2) return loadImage(b2).catch(() => null); }
    } catch {}
    return null;
  }

  const [newUserImg, inviterImg, groupImg] = await Promise.all([
    loadProfile(newUserID),
    loadProfile(inviterID),
    getGroupImage(threadID, api).then(b => b ? loadImage(b).catch(() => null) : null)
  ]);

  const safeUser    = readableText(userName);
  const safeInviter = readableText(inviterName);
  const safeGroup   = readableText(threadName);

  ctx.fillStyle = '#09090f';
  ctx.fillRect(0, 0, W, H);

  const rng = s => { let x = Math.sin(s) * 10000; return x - Math.floor(x); };
  ctx.fillStyle = 'rgba(255,255,255,0.014)';
  for (let i = 0; i < 280; i++) {
    ctx.beginPath();
    ctx.arc(rng(i * 2.3) * W, rng(i * 4.7) * H, rng(i * 7.1) * 1.3 + 0.2, 0, Math.PI * 2);
    ctx.fill();
  }

  const splitX = Math.round(W * 0.385);
  const PAD    = 44;  

  ctx.fillStyle = '#0d0d16';
  ctx.fillRect(0, 0, splitX, H);

  {
    const g = ctx.createLinearGradient(splitX - 1, 0, splitX + 28, 0);
    g.addColorStop(0, 'rgba(255,255,255,0.10)');
    g.addColorStop(1, 'rgba(255,255,255,0)');
    ctx.fillStyle = g;
    ctx.fillRect(splitX - 1, 0, 30, H);
  }

  {
    const lh = H * 0.52, ly = (H - lh) / 2;
    const g  = ctx.createLinearGradient(0, ly, 0, ly + lh);
    g.addColorStop(0,   'rgba(46,204,113,0)');
    g.addColorStop(0.4, 'rgba(46,204,113,0.8)');
    g.addColorStop(0.6, 'rgba(46,204,113,0.8)');
    g.addColorStop(1,   'rgba(46,204,113,0)');
    ctx.fillStyle = g;
    ctx.fillRect(0, ly, 3, lh);
  }

  {
    const rCX = splitX + (W - splitX) * 0.5;
    const g   = ctx.createRadialGradient(rCX, H * 0.42, 0, rCX, H * 0.42, 380);
    g.addColorStop(0, 'rgba(50,110,255,0.055)');
    g.addColorStop(1, 'rgba(0,0,0,0)');
    ctx.fillStyle = g;
    ctx.fillRect(splitX, 0, W - splitX, H);
  }

  ctx.save();
  ctx.shadowColor = 'rgba(80,160,255,0.28)'; ctx.shadowBlur = 22;
  ctx.strokeStyle = 'rgba(80,160,255,0.2)';  ctx.lineWidth  = 2;
  roundRect(ctx, 6, 6, W - 12, H - 12, 18);
  ctx.stroke();
  ctx.restore();

  const leftCX  = splitX / 2;
  const avatarR = 115;
  const avatarY = H / 2 - 18;

  ctx.save();
  ctx.textAlign = 'center';
  ctx.font      = '600 17px "Segoe UI", Arial';
  ctx.fillStyle = 'rgba(46,204,113,0.85)';
  ctx.letterSpacing = '2px';
  ctx.fillText('N E W   M E M B E R', leftCX, 50);
  ctx.restore();

  ctx.save();
  ctx.shadowColor = 'rgba(46,204,113,0.6)'; ctx.shadowBlur = 32;
  ctx.strokeStyle = 'rgba(46,204,113,0.9)'; ctx.lineWidth  = 3.5;
  ctx.beginPath(); ctx.arc(leftCX, avatarY, avatarR + 8, 0, Math.PI * 2); ctx.stroke();
  ctx.restore();

  ctx.strokeStyle = 'rgba(255,255,255,0.05)'; ctx.lineWidth = 1.5;
  ctx.beginPath(); ctx.arc(leftCX, avatarY, avatarR + 17, 0, Math.PI * 2); ctx.stroke();

  if (newUserImg) {
    drawCircleAvatar(ctx, newUserImg, leftCX, avatarY, avatarR);
  } else {
    ctx.fillStyle = '#161628';
    ctx.beginPath(); ctx.arc(leftCX, avatarY, avatarR, 0, Math.PI * 2); ctx.fill();
    ctx.save();
    ctx.textAlign = 'center'; ctx.textBaseline = 'middle';
    ctx.font = `bold ${Math.round(avatarR * 0.7)}px Arial`;
    ctx.fillStyle = 'rgba(255,255,255,0.15)';
    ctx.fillText('👤', leftCX, avatarY);
    ctx.restore();
  }

  {
    const maxW = splitX - 32;
    ctx.save();
    ctx.textAlign = 'center';
    const { text, size } = fitText(ctx, safeUser, maxW, 34, 15);
    ctx.font      = `bold ${size}px "Segoe UI", Arial`;
    ctx.fillStyle = '#f0f0f8';
    ctx.shadowColor = 'rgba(0,0,0,0.7)'; ctx.shadowBlur = 8;
    ctx.fillText(text, leftCX, avatarY + avatarR + 40);
    ctx.restore();
  }

  {
    const dy = avatarY + avatarR + 57;
    const dw = splitX * 0.44;
    const g  = ctx.createLinearGradient(leftCX - dw / 2, 0, leftCX + dw / 2, 0);
    g.addColorStop(0, 'transparent'); g.addColorStop(0.5, 'rgba(255,255,255,0.1)'); g.addColorStop(1, 'transparent');
    ctx.strokeStyle = g; ctx.lineWidth = 1;
    ctx.beginPath(); ctx.moveTo(leftCX - dw / 2, dy); ctx.lineTo(leftCX + dw / 2, dy); ctx.stroke();
  }

  {
    const bText = `✦  ${ordinal(memberCount)} Member  ✦`;
    ctx.save();
    ctx.font = 'bold 17px "Segoe UI", Arial';
    ctx.textAlign = 'center';
    const bw = ctx.measureText(bText).width + 32;
    const bh = 36, bx = leftCX - bw / 2, by = avatarY + avatarR + 70;

    const bg = ctx.createLinearGradient(bx, 0, bx + bw, 0);
    bg.addColorStop(0, 'rgba(46,204,113,0.07)');
    bg.addColorStop(0.5, 'rgba(46,204,113,0.20)');
    bg.addColorStop(1, 'rgba(46,204,113,0.07)');
    ctx.fillStyle = bg;
    roundRect(ctx, bx, by, bw, bh, 9); ctx.fill();

    ctx.strokeStyle = 'rgba(46,204,113,0.5)'; ctx.lineWidth = 1.5;
    roundRect(ctx, bx, by, bw, bh, 9); ctx.stroke();

    ctx.fillStyle = 'rgba(46,204,113,0.92)';
    ctx.fillText(bText, leftCX, by + 24);
    ctx.restore();
  }

  const rX     = splitX + PAD;
  const rRight = W - PAD;         
  const rW     = rRight - rX;     

  ctx.save();
  ctx.textAlign = 'left';
  ctx.font      = 'bold 40px "Segoe UI", Arial';
  const wGrad = ctx.createLinearGradient(rX, 0, rX + 500, 0);
  wGrad.addColorStop(0, '#ffffff');
  wGrad.addColorStop(1, 'rgba(255,255,255,0.55)');
  ctx.fillStyle   = wGrad;
  ctx.shadowColor = 'rgba(255,255,255,0.15)'; ctx.shadowBlur = 12;
  ctx.fillText('Welcome To Our Group', rX, 90);
  ctx.restore();

  ctx.save();
  ctx.shadowColor = 'rgba(100,200,255,0.8)'; ctx.shadowBlur = 10;
  ctx.strokeStyle = 'rgba(100,200,255,0.8)'; ctx.lineWidth  = 3;
  ctx.beginPath(); ctx.moveTo(rX, 102); ctx.lineTo(rX + 130, 102); ctx.stroke();
  ctx.restore();

  const groupSecY = 155;
  const gAvSize   = 90;   

  ctx.save();
  ctx.textAlign = 'left'; ctx.font = '500 12px "Segoe UI", Arial';
  ctx.fillStyle = 'rgba(0,200,255,0.55)';
  ctx.fillText('G R O U P', rX, groupSecY);
  ctx.restore();

  const gAx = rX, gAy = groupSecY + 14;

  if (groupImg) {
    ctx.save();
    roundRect(ctx, gAx, gAy, gAvSize, gAvSize, 16);
    ctx.clip();
    ctx.drawImage(groupImg, gAx, gAy, gAvSize, gAvSize);
    ctx.restore();
    ctx.save();
    ctx.strokeStyle = 'rgba(0,200,255,0.5)'; ctx.lineWidth = 2.5;
    roundRect(ctx, gAx, gAy, gAvSize, gAvSize, 16); ctx.stroke();
    ctx.restore();
  } else {
    ctx.fillStyle = '#161628';
    roundRect(ctx, gAx, gAy, gAvSize, gAvSize, 16); ctx.fill();
    ctx.save();
    ctx.textAlign = 'center'; ctx.textBaseline = 'middle';
    ctx.font = '44px Arial'; ctx.fillStyle = 'rgba(255,255,255,0.18)';
    ctx.fillText('🏠', gAx + gAvSize / 2, gAy + gAvSize / 2);
    ctx.restore();
  }

  {
    const gTx  = gAx + gAvSize + 20;
    const gTw  = rRight - gTx;          
    const gTcY = gAy + gAvSize / 2;     

    ctx.save();
    ctx.textAlign = 'left';
    const { text: gn, size: gs } = fitText(ctx, safeGroup, gTw, 34, 14);
    ctx.font      = `bold ${gs}px "Segoe UI", Arial`;
    ctx.fillStyle = '#e8e8f2';
    ctx.shadowColor = 'rgba(0,0,0,0.6)'; ctx.shadowBlur = 6;
    ctx.fillText(gn, gTx, gTcY + gs * 0.35);
    ctx.restore();
  }

  {
    const sy = gAy + gAvSize + 22;
    const g  = ctx.createLinearGradient(rX, 0, rRight, 0);
    g.addColorStop(0, 'rgba(255,255,255,0.10)');
    g.addColorStop(0.7, 'rgba(255,255,255,0.03)');
    g.addColorStop(1, 'rgba(255,255,255,0)');
    ctx.strokeStyle = g; ctx.lineWidth = 1;
    ctx.beginPath(); ctx.moveTo(rX, sy); ctx.lineTo(rRight, sy); ctx.stroke();
  }

  const invSecY  = gAy + gAvSize + 40;
  const invAvR   = 52;  

  ctx.save();
  ctx.textAlign = 'left'; ctx.font = '500 12px "Segoe UI", Arial';
  ctx.fillStyle = 'rgba(255,215,0,0.5)';
  ctx.fillText('A D D E D   B Y', rX, invSecY);
  ctx.restore();

  const invAy  = invSecY + 14;
  const invCX  = rX + invAvR;
  const invCY  = invAy + invAvR;

  if (inviterImg) {
    ctx.save();
    ctx.shadowColor = 'rgba(255,215,0,0.4)'; ctx.shadowBlur = 18;
    ctx.strokeStyle = 'rgba(255,215,0,0.65)'; ctx.lineWidth  = 2.5;
    ctx.beginPath(); ctx.arc(invCX, invCY, invAvR + 4, 0, Math.PI * 2); ctx.stroke();
    ctx.restore();
    drawCircleAvatar(ctx, inviterImg, invCX, invCY, invAvR);
  } else {
    ctx.fillStyle = '#161628';
    ctx.beginPath(); ctx.arc(invCX, invCY, invAvR, 0, Math.PI * 2); ctx.fill();
    ctx.save();
    ctx.textAlign = 'center'; ctx.textBaseline = 'middle';
    ctx.font = '34px Arial'; ctx.fillStyle = 'rgba(255,255,255,0.18)';
    ctx.fillText('👤', invCX, invCY);
    ctx.restore();
  }

  {
    const iTx = invCX + invAvR + 20;
    const iTw = rRight - iTx;
    ctx.save();
    ctx.textAlign = 'left';
    const { text: iname, size: is } = fitText(ctx, safeInviter, iTw, 34, 14);
    ctx.font      = `bold ${is}px "Segoe UI", Arial`;
    ctx.fillStyle = '#e8e8f2';
    ctx.shadowColor = 'rgba(0,0,0,0.6)'; ctx.shadowBlur = 6;
    ctx.fillText(iname, iTx, invCY + is * 0.35);
    ctx.restore();
  }

  {
    const blockY = invAy + invAvR * 2 + 32;
    const blockH = H - blockY - 44;  

    {
      const g = ctx.createLinearGradient(rX, 0, rRight, 0);
      g.addColorStop(0, 'rgba(255,255,255,0.10)');
      g.addColorStop(0.7, 'rgba(255,255,255,0.03)');
      g.addColorStop(1, 'rgba(255,255,255,0)');
      ctx.strokeStyle = g; ctx.lineWidth = 1;
      ctx.beginPath(); ctx.moveTo(rX, blockY - 10); ctx.lineTo(rRight, blockY - 10); ctx.stroke();
    }

    const pillG = ctx.createLinearGradient(rX, blockY, rRight, blockY + blockH);
    pillG.addColorStop(0, 'rgba(255,255,255,0.03)');
    pillG.addColorStop(1, 'rgba(255,255,255,0.01)');
    ctx.fillStyle = pillG;
    roundRect(ctx, rX, blockY, rRight - rX, blockH, 14); ctx.fill();

    ctx.save();
    ctx.strokeStyle = 'rgba(255,255,255,0.06)'; ctx.lineWidth = 1;
    roundRect(ctx, rX, blockY, rRight - rX, blockH, 14); ctx.stroke();
    ctx.restore();

    const cx = rX + (rRight - rX) / 2;
    const cy = blockY + blockH / 2;

    ctx.save();
    ctx.textAlign = 'center';
    ctx.font = 'bold 22px "Segoe UI", Arial';
    const pGrad = ctx.createLinearGradient(cx - 120, 0, cx + 120, 0);
    pGrad.addColorStop(0, 'rgba(255,255,255,0.55)');
    pGrad.addColorStop(0.4, 'rgba(255,255,255,0.9)');
    pGrad.addColorStop(0.65, 'rgba(100,200,255,1)');
    pGrad.addColorStop(1, 'rgba(46,204,113,1)');
    ctx.fillStyle = pGrad;
    ctx.shadowColor = 'rgba(100,200,255,0.55)'; ctx.shadowBlur = 16;
    ctx.fillText('Powered By EryXenX', cx, cy + 8);
    ctx.restore();
  }

  ctx.save();
  ctx.textAlign = 'right'; ctx.font = '400 14px "Segoe UI", Arial';
  ctx.fillStyle = 'rgba(255,255,255,0.12)';
  ctx.fillText('Enjoy your stay ✨', W - 28, H - 20);
  ctx.restore();

  const tempPath = path.join(__dirname, `temp_welcome_${Date.now()}.png`);
  await fs.writeFile(tempPath, canvas.toBuffer('image/png'));
  return tempPath;
  }