/* =============================================================
 * @whynot/design — chrome.js
 * ------------------------------------------------------------
 *   <wn-top-nav>, <wn-sidebar> / <wn-sidebar-group> /
 *   <wn-sidebar-item>, <wn-page-header>, <wn-pipeline>,
 *   <wn-prototype-card>
 * ============================================================= */

import { LitElement, html, nothing } from "lit";
import { WnBase } from "./atoms.js";

/* ---------- <wn-top-nav> ---------- */
export class WnTopNav extends WnBase {
  static properties = {
    logoSrc: { type: String, attribute: "logo-src" },
    brand:   { type: String },
    slug:    { type: String },
  };
  constructor() { super(); this.brand = "whynot"; this.slug = "control"; }
  render() {
    return html`
      <nav class="wn-topnav" part="nav">
        <div class="wn-topnav__brand">
          ${this.logoSrc ? html`<img src=${this.logoSrc} alt="">` : nothing}
          <span>${this.brand}</span>
          ${this.slug ? html`<span class="wn-topnav__brand-slug">/ ${this.slug}</span>` : nothing}
        </div>
        <div class="wn-topnav__links"><slot name="links"></slot></div>
        <div class="wn-topnav__right"><slot name="right"></slot></div>
      </nav>
    `;
  }
}

/* ---------- <wn-sidebar> ---------- */
export class WnSidebar extends WnBase {
  static properties = { activation: { type: String } };
  render() {
    return html`
      <aside class="wn-sidebar" part="sidebar">
        <slot></slot>
        ${this.activation
          ? html`<div class="wn-sidebar__footer">
                   <div class="wn-sidebar__activation">
                     <span class="wn-sidebar__activation-dot"></span>
                     <span>${this.activation}</span>
                   </div>
                 </div>`
          : nothing}
      </aside>
    `;
  }
}

export class WnSidebarGroup extends WnBase {
  static properties = { label: { type: String } };
  render() {
    return html`
      <div class="wn-sidebar__group" part="group">
        ${this.label ? html`<wn-eyebrow class="wn-sidebar__group-label">${this.label}</wn-eyebrow>` : nothing}
        <slot></slot>
      </div>
    `;
  }
}

export class WnSidebarItem extends WnBase {
  static properties = {
    href:    { type: String },
    icon:    { type: String },
    active:  { type: Boolean, reflect: true },
    count:   { type: String },
    variant: { type: String, reflect: true },
  };
  render() {
    const cls = ["wn-sidebar__item",
      this.active ? "wn-sidebar__item--active" : "",
      this.variant === "doc" ? "wn-sidebar__item--doc" : "",
    ].filter(Boolean).join(" ");
    const inner = html`
      ${this.icon ? html`<wn-icon name=${this.icon} size=${this.variant === "doc" ? "sm" : "md"}></wn-icon>` : nothing}
      <slot></slot>
      ${this.count ? html`<span class="wn-sidebar__count">${this.count}</span>` : nothing}
    `;
    return this.href
      ? html`<a class=${cls} href=${this.href} part="item">${inner}</a>`
      : html`<div class=${cls} part="item">${inner}</div>`;
  }
}

/* ---------- <wn-page-header> ---------- */
export class WnPageHeader extends WnBase {
  static properties = {
    eyebrow:    { type: String },
    title:      { type: String },
    lede:       { type: String },
    hasActions: { state: true },
  };
  constructor() { super(); this.hasActions = false; }
  _onSlot() { this.hasActions = !!this.querySelector('[slot="actions"]'); }
  render() {
    return html`
      <header class="wn-page-header" part="root">
        ${this.eyebrow ? html`<wn-eyebrow>${this.eyebrow}</wn-eyebrow>` : nothing}
        <slot name="eyebrow"></slot>
        <div class="wn-page-header__row">
          <h1 class="wn-page-header__title">${this.title}<slot name="title"></slot></h1>
          <div class="wn-page-header__actions" ?hidden=${!this.hasActions}>
            <slot name="actions" @slotchange=${this._onSlot}></slot>
          </div>
        </div>
        ${this.lede ? html`<p class="wn-page-header__lede">${this.lede}</p>` : nothing}
        <slot name="lede"></slot>
      </header>
    `;
  }
}

/* ---------- <wn-pipeline> ---------- */
export class WnPipeline extends WnBase {
  static properties = {
    stages:    { type: Array },
    activeIdx: { type: Number, attribute: "active-idx" },
  };
  constructor() {
    super();
    this.stages = [
      { num: "Stage 0", name: "Raw idea",       meta: "inbox/" },
      { num: "Stage 1", name: "Triage",         meta: "" },
      { num: "Stage 2", name: "Prototype card", meta: "prototypes/" },
      { num: "Stage 3", name: "Experiment",     meta: "" },
      { num: "Stage 4", name: "Signal review",  meta: "" },
    ];
    this.activeIdx = 0;
  }
  render() {
    return html`
      <div class="wn-pipeline" part="root">
        ${this.stages.map((s, i) => {
          const state = i < this.activeIdx ? "done" : i === this.activeIdx ? "active" : "pending";
          const cls = `wn-pipeline__stage wn-pipeline__stage--${state}`;
          return html`
            <div class=${cls}>
              <span class="wn-pipeline__num">${s.num}</span>
              <span class="wn-pipeline__name">${s.name}</span>
              ${s.meta ? html`<span class="wn-pipeline__meta">${s.meta}</span>` : nothing}
              ${i > 0 ? html`<span class="wn-pipeline__arrow">→</span>` : nothing}
            </div>
          `;
        })}
      </div>
    `;
  }
}

/* ---------- <wn-prototype-card> ---------- */
export class WnPrototypeCard extends WnBase {
  static properties = {
    cardId:     { type: String, attribute: "card-id", reflect: true },
    signal:     { type: String, reflect: true },
    stageLabel: { type: String, attribute: "stage-label" },
    href:       { type: String },
  };
  constructor() { super(); this.signal = "S1"; }
  _onClick() {
    if (this.href) window.location.href = this.href;
    this.dispatchEvent(new CustomEvent("wn-open", { detail: { id: this.cardId }, bubbles: true, composed: true }));
  }
  render() {
    const clickable = !!this.href;
    const cls = "wn-card wn-prototype-card" + (clickable ? " wn-card--clickable" : "");
    return html`
      <article class=${cls}
               role=${clickable ? "button" : nothing}
               tabindex=${clickable ? "0" : nothing}
               @click=${clickable ? this._onClick : nothing}
               part="card">
        <header class="wn-card__head">
          <wn-eyebrow>${this.cardId ? this.cardId + " · " : ""}Prototype</wn-eyebrow>
          <wn-stage-dot level=${this.signal}>${this.stageLabel || this.signal}</wn-stage-dot>
        </header>
        <h3 class="wn-card__title"><slot name="pitch"></slot></h3>
        <div class="wn-prototype-card__qrow">
          <span class="wn-prototype-card__qkey">Learning q.</span>
          <span class="wn-prototype-card__qval"><slot name="learning"></slot></span>
          <span class="wn-prototype-card__qkey">Smallest test</span>
          <span class="wn-prototype-card__qval"><slot name="test"></slot></span>
        </div>
        <footer class="wn-card__foot">
          <span><slot name="target"></slot></span>
          <span>${this.signal} signal</span>
        </footer>
      </article>
    `;
  }
}

export function defineChrome() {
  if (!customElements.get("wn-top-nav"))        customElements.define("wn-top-nav",        WnTopNav);
  if (!customElements.get("wn-sidebar"))        customElements.define("wn-sidebar",        WnSidebar);
  if (!customElements.get("wn-sidebar-group"))  customElements.define("wn-sidebar-group",  WnSidebarGroup);
  if (!customElements.get("wn-sidebar-item"))   customElements.define("wn-sidebar-item",   WnSidebarItem);
  if (!customElements.get("wn-page-header"))    customElements.define("wn-page-header",    WnPageHeader);
  if (!customElements.get("wn-pipeline"))       customElements.define("wn-pipeline",       WnPipeline);
  if (!customElements.get("wn-prototype-card")) customElements.define("wn-prototype-card", WnPrototypeCard);
}