import { enter, shots } from "./motion.mjs";

const cream = "#f0efda",
  green = "#b7df8a",
  gold = "#dcc28a";
function text(ctx, value, x, y, size, color = cream) {
  ctx.font = `${size}px Pixel`;
  ctx.textAlign = "left";
  ctx.fillStyle = color;
  ctx.fillText(value, x, y);
}
function label(ctx, value, x, y, size = 11, color = "#a8bda3") {
  ctx.font = `${size}px Arial`;
  ctx.fillStyle = color;
  ctx.textAlign = "left";
  ctx.letterSpacing = "2px";
  ctx.fillText(value, x, y);
  ctx.letterSpacing = "0px";
}
function cross(ctx, x, y) {
  ctx.beginPath();
  ctx.moveTo(x - 5, y);
  ctx.lineTo(x + 5, y);
  ctx.moveTo(x, y - 5);
  ctx.lineTo(x, y + 5);
  ctx.stroke();
}
function word(ctx, value, x, y, size, time, start, end, color = cream) {
  // 50ms stagger: the word reads as one gesture, followed by a long quiet hold.
  let offset = 0;
  ctx.font = `${size}px Pixel`;
  for (let i = 0; i < value.length; i++) {
    const a = enter(time, start + i * 0.05);
    const out = enter(time, end - 0.25);
    ctx.save();
    ctx.globalAlpha *= a * (1 - out);
    text(ctx, value[i], x + offset, y + (1 - a) * 12 + out * 12, size, color);
    ctx.restore();
    offset += ctx.measureText(value[i]).width;
  }
}
function mark(ctx, x, y, size, time) {
  ctx.save();
  ctx.translate(x, y);
  ctx.strokeStyle = "rgba(209,217,174,.5)";
  ctx.lineWidth = 1;
  ctx.beginPath();
  ctx.arc(0, 0, size, 0, Math.PI * 2);
  ctx.stroke();
  for (let i = 0; i < 32; i++) {
    const a = (i / 32) * Math.PI * 2,
      r = size - (i % 8 === 0 ? 9 : 3);
    ctx.beginPath();
    ctx.moveTo(Math.sin(a) * r, Math.cos(a) * r);
    ctx.lineTo(Math.sin(a) * size, Math.cos(a) * size);
    ctx.stroke();
  }
  ctx.rotate(Math.sin(time) * 0.09 - 0.35);
  ctx.fillStyle = gold;
  ctx.beginPath();
  ctx.moveTo(0, -size * 0.6);
  ctx.lineTo(size * 0.13, 0);
  ctx.lineTo(0, size * 0.1);
  ctx.lineTo(-size * 0.13, 0);
  ctx.closePath();
  ctx.fill();
  ctx.fillStyle = "#57725b";
  ctx.beginPath();
  ctx.moveTo(0, size * 0.6);
  ctx.lineTo(size * 0.13, 0);
  ctx.lineTo(0, -size * 0.1);
  ctx.lineTo(-size * 0.13, 0);
  ctx.closePath();
  ctx.fill();
  ctx.restore();
}
function screenshot(ctx, image, x, y, w, h) {
  ctx.save();
  ctx.fillStyle = "#07130e";
  ctx.beginPath();
  ctx.roundRect(x - 1, y - 1, w + 2, h + 2, 8);
  ctx.fill();
  ctx.strokeStyle = "rgba(181,205,154,.5)";
  ctx.stroke();
  ctx.beginPath();
  ctx.roundRect(x, y, w, h, 7);
  ctx.clip();
  ctx.drawImage(
    image,
    0,
    0,
    image.naturalWidth,
    image.naturalHeight,
    x,
    y,
    w,
    h,
  );
  ctx.restore();
}
function screenshotShot(ctx, shot, image, t) {
  const a = enter(t, shot.start - 0.125),
    exit = enter(t, shot.end - 0.125);
  ctx.save();
  ctx.globalAlpha = a * (1 - exit);
  label(ctx, shot.chapter, 64, 30, 10, gold);
  text(ctx, shot.title, 62, 76, 34, cream);
  ctx.font = "15px Arial";
  ctx.fillStyle = "#aebfa6";
  ctx.fillText(shot.subtitle, 65, 100);
  // Readable data stays still after a 250ms settle; no continuous pan or zoom.
  const settle = enter(t, shot.start + 0.05),
    leave = enter(t, shot.end - 0.125);
  const w = 1040,
    h = 585,
    x = 120,
    y = 121;
  ctx.save();
  ctx.globalAlpha *= settle;
  ctx.translate(640, y + h / 2 + 8 * (1 - settle) + 8 * leave);
  const scale = 0.96 + 0.04 * settle;
  ctx.scale(scale, scale);
  ctx.translate(-640, -y - h / 2);
  screenshot(ctx, image, x, y, w, h);
  if (shot.image === "game") {
    const focus =
      enter(t, shot.start + 2, 0.25) * (1 - enter(t, shot.end - 0.4, 0.25));
    ctx.globalAlpha *= focus;
    ctx.strokeStyle = gold;
    ctx.lineWidth = 2;
    ctx.strokeRect(x + w * 0.771, y + h * 0.496, w * 0.222, h * 0.482);
    ctx.fillStyle = "#0b1b13";
    ctx.fillRect(x + 24, y + h - 66, 310, 38);
    label(ctx, "LOOK AROUND. PLACE YOUR PIN.", x + 37, y + h - 42, 10, gold);
  }
  ctx.restore();
  ctx.restore();
}
function brandShot(ctx, shot, t, closing) {
  const a = enter(t, shot.start),
    exit = enter(t, shot.end - 0.25);
  ctx.save();
  ctx.globalAlpha = a * (1 - exit);
  label(ctx, shot.chapter, 66, 215, 11, gold);
  if (closing) {
    word(ctx, "MINEGEO", 60, 322, 80, t, shot.start + 0.05, shot.end, green);
    ctx.save();
    ctx.globalAlpha *= enter(t, shot.start + 0.45);
    ctx.font = "20px Arial";
    ctx.fillStyle = "#becdb3";
    ctx.fillText(shot.subtitle, 66, 369);
    ctx.restore();
    const cta = enter(t, shot.start + 0.7);
    ctx.save();
    ctx.globalAlpha *= cta;
    ctx.translate(0, 8 * (1 - cta));
    ctx.fillStyle = green;
    ctx.fillRect(65, 409, 330, 57);
    text(ctx, "MINEGEO.SITE", 88, 448, 25, "#112215");
    label(ctx, "FREE TO EXPLORE  /  FIVE ROUNDS", 66, 500, 10);
    ctx.restore();
  } else {
    word(ctx, "GET LOST.", 60, 313, 68, t, shot.start + 0.05, shot.end);
    word(
      ctx,
      "FIND YOUR WORLD.",
      60,
      392,
      48,
      t,
      shot.start + 0.16,
      shot.end,
      green,
    );
    ctx.save();
    ctx.globalAlpha *= enter(t, shot.start + 0.7);
    ctx.font = "17px Arial";
    ctx.fillStyle = "#becdb3";
    ctx.fillText(shot.subtitle, 66, 445);
    ctx.restore();
  }
  ctx.restore();
}
function drawBanner(ctx, t, pin) {
  label(ctx, "YOUR NEXT EXPEDITION", 66, 108, 12, gold);
  // Always legible in Discord: only the scene and targeting sweep loop.
  text(ctx, "MINEGEO", 60, 233, 82, green);
  ctx.font = "18px Arial";
  ctx.fillStyle = "#ccd7bf";
  ctx.fillText("Get lost. Find your world.", 66, 280);
  ctx.strokeStyle = "rgba(184,207,160,.35)";
  ctx.beginPath();
  ctx.moveTo(66, 320);
  ctx.lineTo(430, 320);
  ctx.stroke();
  label(ctx, "MINEGEO.SITE", 66, 350, 13, cream);
  label(ctx, "EXPLORE / GUESS / DISCOVER", 66, 388, 10);
  mark(ctx, 1126, 68, 25, (t / 3) * Math.PI * 2);
  if (pin) {
    ctx.save();
    ctx.translate(pin.x, pin.y);
    const phase = (t / 3) * Math.PI * 2,
      pulse = 0.5 - 0.5 * Math.cos(phase);
    ctx.strokeStyle = `rgba(234,210,144,${0.25 + 0.25 * (1 - pulse)})`;
    ctx.lineWidth = 1;
    ctx.beginPath();
    ctx.arc(0, 0, 20 + pulse * 13, 0, Math.PI * 2);
    ctx.stroke();
    ctx.rotate(phase);
    ctx.strokeStyle = "rgba(234,210,144,.65)";
    for (let i = 0; i < 4; i++) {
      ctx.rotate(Math.PI / 2);
      ctx.beginPath();
      ctx.moveTo(28, -7);
      ctx.lineTo(28, 7);
      ctx.stroke();
    }
    ctx.restore();
  }
}
export function composeFrame(
  ctx,
  source,
  { width, height, banner, time: t, screenshots, pin },
) {
  ctx.clearRect(0, 0, width, height);
  ctx.drawImage(source, 0, 0);
  const scale = width / (banner ? 1200 : 1280),
    w = width / scale,
    h = height / scale;
  ctx.save();
  ctx.scale(scale, scale);
  const gradient = ctx.createLinearGradient(0, 0, w, 0);
  gradient.addColorStop(0, "rgba(5,15,10,.97)");
  gradient.addColorStop(0.38, "rgba(5,15,10,.86)");
  gradient.addColorStop(0.8, "rgba(5,15,10,0)");
  ctx.fillStyle = gradient;
  ctx.fillRect(0, 0, w, h);
  const wash = ctx.createLinearGradient(0, 0, 0, h);
  wash.addColorStop(0, "rgba(5,15,10,.2)");
  wash.addColorStop(0.65, "rgba(5,15,10,0)");
  wash.addColorStop(1, "rgba(5,15,10,.55)");
  ctx.fillStyle = wash;
  ctx.fillRect(0, 0, w, h);
  ctx.strokeStyle = "rgba(171,196,144,.25)";
  ctx.lineWidth = 1;
  cross(ctx, 28, 28);
  cross(ctx, w - 28, 28);
  cross(ctx, 28, h - 28);
  cross(ctx, w - 28, h - 28);
  if (banner)
    drawBanner(ctx, t, pin ? { x: pin.x / scale, y: pin.y / scale } : null);
  else {
    for (const shot of shots) {
      if (t < shot.start - 0.125 || t > shot.end + 0.125) continue;
      if (shot.image) screenshotShot(ctx, shot, screenshots[shot.image], t);
      else brandShot(ctx, shot, t, shot.start === 23);
    }
    if (t < 3 || t >= 23) {
      mark(ctx, 1188, 81, 29, t * 0.12);
      label(ctx, "A MINECRAFT GUESSING GAME", 66, 65, 10);
    }
    const current = shots.findIndex((s) => t >= s.start && t < s.end);
    for (let i = 0; i < shots.length; i++) {
      ctx.fillStyle = i <= current ? "#bfd49b" : "rgba(165,186,143,.3)";
      ctx.fillRect(28 + i * 16, h - 20, 10, 2);
    }
    ctx.fillStyle = `rgba(5,15,10,${1 - enter(t, 0)})`;
    ctx.fillRect(0, 0, w, h);
    ctx.fillStyle = `rgba(5,15,10,${enter(t, 29.75)})`;
    ctx.fillRect(0, 0, w, h);
  }
  ctx.restore();
}