import { Zombie } from './Zombie.js';
import { GameObject } from '../engine/GameObject.js';
import { Vector2D } from '../engine/Vector2D.js';

export class Leaper extends Zombie {
  constructor(
    x,
    y,
    target,
    {
      container,
      viewport,
      speed = 95,
      size = 28,
      color = [0.15, 0.25, 0.75, 1],
      health = 3,
      knockback = 240,
      scoreValue = 6,
      dashRange = 300,
      windupTime = 0.35,
      dashTime = 0.28,
      dashSpeed = 680,
      dashCooldown = 1.8,
      emergeTime = 0,
    } = {},
  ) {
    super(x, y, target, {
      container,
      viewport,
      speed,
      size,
      color,
      health,
      knockback,
      scoreValue,
      emergeTime,
    });
    this.dashRange = dashRange;
    this.windupTime = windupTime;
    this.dashTime = dashTime;
    this.dashSpeed = dashSpeed;
    this.dashCooldown = dashCooldown;
    this._dashTimer = 0;
    this._windupTimer = 0;
    this._dashCooldown = 0;
    this._dashDirection = new Vector2D(1, 0);
    this._time = 0;
  }

  update(dt) {
    this._time += dt;
    if (this._updateEmerge(dt)) return;
    this._dashCooldown = Math.max(0, this._dashCooldown - dt);

    const delta = this.target.pos.subV(this.pos);
    const distance = delta.length();

    let move = new Vector2D(0, 0);
    if (this._windupTimer > 0) {
      this._windupTimer -= dt;
      if (this._windupTimer <= 0) {
        this._dashTimer = this.dashTime;
        this._dashDirection = distance > 1 ? delta.divS(distance) : new Vector2D(1, 0);
      }
    } else if (this._dashTimer > 0) {
      this._dashTimer -= dt;
      move = this._dashDirection.mulS(this.dashSpeed);
    } else if (distance > 1) {
      if (distance < this.dashRange && this._dashCooldown <= 0) {
        this._windupTimer = this.windupTime;
      } else {
        move = delta.divS(distance).mulS(this.speed);
      }
    }

    this.velocity = move.addV(this._hitKnockback);
    GameObject.prototype.update.call(this, dt);

    this._hitKnockback = this._hitKnockback.mulS(Math.max(0, 1 - dt * this.knockbackDamping));
    this._flash = Math.max(0, this._flash - dt);
  }

  draw(renderer) {
    this._drawEmerge(renderer);
    const s = this.size * this._emergeSize();
    const dashing = this._dashTimer > 0;
    const winding = this._windupTimer > 0;

    let color = this.baseColor;
    if (this._flash > 0) {
      color = [1, 1, 1, 1];
    } else if (winding || dashing) {
      color = [
        this.baseColor[0] + (1 - this.baseColor[0]) * 0.8,
        this.baseColor[1] + (1 - this.baseColor[1]) * 0.8,
        this.baseColor[2],
        1,
      ];
    }

    const towards = dashing ? this._dashDirection : this.target.pos.subV(this.pos);
    const facing = Math.atan2(towards.y, towards.x);
    const dirX = Math.cos(facing);
    const dirY = Math.sin(facing);
    const perpX = -dirY;
    const perpY = dirX;

    const shade = [color[0] * 0.65, color[1] * 0.65, color[2] * 0.65, 1];
    const shadeDark = [color[0] * 0.4, color[1] * 0.4, color[2] * 0.4, 1];
    const light = [
      Math.min(1, color[0] + 0.25),
      Math.min(1, color[1] + 0.25),
      Math.min(1, color[2] + 0.25),
      1,
    ];

    const drawLimb = (ax, ay, bx, by, thickness, limbColor) => {
      const len = Math.hypot(bx - ax, by - ay);
      if (len < 1) return;
      renderer.drawTexture(
        renderer.whiteTexture,
        (ax + bx) / 2 - len / 2,
        (ay + by) / 2 - thickness / 2,
        len,
        thickness,
        limbColor,
        Math.atan2(by - ay, bx - ax),
      );
    };

    const bodyLen = s * (dashing ? 1.45 : winding ? 0.9 : 1.15);
    const bodyH = s * (dashing ? 0.42 : winding ? 0.7 : 0.55);

    renderer.drawTexture(
      renderer.whiteTexture,
      this.pos.x - s * 0.72,
      this.pos.y - s * 0.26 + s * 0.08,
      s * 1.44,
      s * 0.52,
      [0, 0, 0, 0.35],
    );

    if (winding) {
      renderer.drawTexture(
        renderer.whiteTexture,
        this.pos.x - s * 0.9,
        this.pos.y - s * 0.6,
        s * 1.8,
        s * 1.2,
        [1, 1, 1, 0.3],
      );
    }

    const tailBaseX = this.pos.x - dirX * bodyLen * 0.45;
    const tailBaseY = this.pos.y - dirY * bodyLen * 0.45;
    const tailSway = dashing ? 0 : Math.sin(this._time * 16) * s * 0.14;
    const tailTipX = tailBaseX - dirX * (dashing ? s * 0.6 : s * 0.42) + perpX * tailSway;
    const tailTipY = tailBaseY - dirY * (dashing ? s * 0.6 : s * 0.42) + perpY * tailSway;
    drawLimb(tailBaseX, tailBaseY, tailTipX, tailTipY, s * 0.11, shadeDark);
    drawLimb(
      tailTipX, tailTipY,
      tailTipX + perpX * tailSway * 0.5 - dirX * s * 0.08,
      tailTipY + perpY * tailSway * 0.5 - dirY * s * 0.08,
      s * 0.15,
      shade,
    );

    const legL = s * (dashing ? 0.3 : winding ? 0.16 : 0.4);
    const legW = s * 0.11;
    for (let pair = 0; pair < 2; pair += 1) {
      const front = pair === 0;
      const baseFx = this.pos.x + dirX * bodyLen * (front ? 0.4 : -0.4);
      const baseFy = this.pos.y + dirY * bodyLen * (front ? 0.4 : -0.4);
      for (let i = 0; i < 2; i += 1) {
        const sign = i === 0 ? 1 : -1;
        const bx = baseFx + perpX * bodyH * 0.5 * sign;
        const by = baseFy + perpY * bodyH * 0.5 * sign;
        let fx = bx;
        let fy = by;
        if (dashing) {
          fx = bx - dirX * legL;
          fy = by - dirY * legL;
        } else if (winding) {
          fx = bx + perpX * sign * s * 0.1;
          fy = by + s * 0.13;
        } else {
          const run = Math.sin(this._time * 18 + (front ? 0 : Math.PI)) * s * 0.16;
          fx = bx + dirX * run * 0.7 + perpX * sign * s * 0.04;
          fy = by + legL;
        }
        drawLimb(bx, by, fx, fy, legW, shadeDark);
      }
    }

    renderer.drawTexture(
      renderer.whiteTexture,
      this.pos.x - bodyLen / 2,
      this.pos.y - bodyH / 2,
      bodyLen,
      bodyH,
      color,
      facing,
    );

    const headLen = s * (dashing ? 0.38 : 0.44);
    const headH = s * 0.3;
    const headCx = this.pos.x + dirX * (bodyLen * 0.5 - s * 0.03);
    const headCy = this.pos.y + dirY * (bodyLen * 0.5 - s * 0.03);
    renderer.drawTexture(
      renderer.whiteTexture,
      headCx - headLen / 2,
      headCy - headH / 2,
      headLen,
      headH,
      light,
      facing,
    );

    const snoutLen = s * 0.28;
    const snoutCx = headCx + dirX * (headLen * 0.5 + snoutLen * 0.4);
    const snoutCy = headCy + dirY * (headLen * 0.5 + snoutLen * 0.4);
    drawLimb(headCx, headCy, snoutCx, snoutCy, s * 0.18, shade);
    const noseS = s * 0.08;
    renderer.drawTexture(
      renderer.whiteTexture,
      snoutCx + dirX * snoutLen * 0.5 - noseS / 2,
      snoutCy + dirY * snoutLen * 0.5 - noseS / 2,
      noseS,
      noseS,
      [0.03, 0.05, 0.12, 1],
    );

    const eyeS = s * 0.08;
    const eyeCx = headCx + dirX * headLen * 0.28;
    const eyeCy = headCy + dirY * headLen * 0.28;
    for (let i = 0; i < 2; i += 1) {
      const sign = i === 0 ? 1 : -1;
      renderer.drawTexture(
        renderer.whiteTexture,
        eyeCx + perpX * eyeS * 1.5 * sign - eyeS / 2,
        eyeCy + perpY * eyeS * 1.5 * sign - eyeS / 2,
        eyeS,
        eyeS,
        [0.03, 0.05, 0.12, 1],
      );
    }

    const earS = s * 0.13;
    const earBack = dashing || winding ? 0.6 : 1;
    for (let i = 0; i < 2; i += 1) {
      const sign = i === 0 ? 1 : -1;
      const eax = headCx + perpX * earS * 1.55 * sign;
      const eay = headCy + perpY * earS * 1.55 * sign;
      drawLimb(
        eax, eay,
        eax - dirX * earS * earBack,
        eay - dirY * earS * earBack,
        earS * 0.5,
        shadeDark,
      );
    }
  }
}