import type { TemplateResult } from "lit";
import { html, LitElement, render } from "lit";
import { customElement, query, state } from "lit/decorators.js";
import "./components/Difficulties";
import "./components/Maps";
import {
  PatternDecoder,
  territoryPatterns,
  TerritoryPatternStorage,
} from "./TerritoryPatterns";

@customElement("territory-patterns-modal")
export class territoryPatternsModal extends LitElement {
  @query("o-modal") private modalEl!: HTMLElement & {
    open: () => void;
    close: () => void;
  };

  @query("#territory-patterns-input-preview-button")
  private previewButton!: HTMLElement;

  @state() private selectedPattern =
    TerritoryPatternStorage.getSelectedPattern();

  @state() private buttonWidth: number = 100;

  @state() private lockedPatterns: string[] = [];
  @state() private lockedReasons: Record<string, string> = {};
  @state() private hoveredPattern: string | null = null;
  @state() private hoverPosition = { x: 0, y: 0 };

  private resizeObserver: ResizeObserver;

  constructor() {
    super();
    this.resizeObserver = new ResizeObserver((entries) => {
      for (const entry of entries) {
        if (entry.target.classList.contains("preview-container")) {
          this.buttonWidth = entry.contentRect.width;
        }
      }
    });
  }

  connectedCallback() {
    super.connectedCallback();
    this.updateComplete.then(() => {
      const containers = this.renderRoot.querySelectorAll(".preview-container");
      containers.forEach((container) => this.resizeObserver.observe(container));
      this.updatePreview();
    });

    this.setLockedPatterns(["evan"], {
      evan: "This pattern is locked because it is restricted.",
    });
  }

  disconnectedCallback() {
    super.disconnectedCallback();
    this.resizeObserver.disconnect();
  }

  createRenderRoot() {
    return this;
  }

  render() {
    return html`
      ${this.hoveredPattern && this.lockedReasons[this.hoveredPattern]
        ? html`
            <div
              class="fixed z-[9999] px-3 py-2 rounded bg-black text-white text-sm pointer-events-none shadow-md"
              style="top: ${this.hoverPosition.y + 12}px; left: ${this
                .hoverPosition.x + 12}px;"
            >
              ${this.lockedReasons[this.hoveredPattern]}
            </div>
          `
        : null}
      <o-modal id="territoryPatternsModal" title="Select Territory Pattern">
        <div
          class="flex flex-wrap gap-4 p-2"
          style="justify-content: center; align-items: flex-start;"
        >
          ${Object.entries(territoryPatterns.patterns).map(([key, pattern]) => {
            const isLocked = this.isPatternLocked(key);
            const reason = this.lockedReasons[key] || "Locked";

            return html`
              <button
                class="border p-2 rounded-lg shadow text-black dark:text-white text-left
                  ${this.selectedPattern === key
                  ? "bg-blue-500 text-white"
                  : "bg-gray-100 hover:bg-gray-200 dark:bg-gray-800 dark:hover:bg-gray-700"}
                  ${isLocked ? "opacity-50 cursor-not-allowed" : ""}"
                style="flex: 0 1 calc(25% - 1rem); max-width: calc(25% - 1rem);"
                @click=${() => !isLocked && this.selectPattern(key)}
                @mouseenter=${(e: MouseEvent) => this.handleMouseEnter(key, e)}
                @mousemove=${(e: MouseEvent) => this.handleMouseMove(e)}
                @mouseleave=${() => this.handleMouseLeave()}
              >
                <div class="text-sm font-bold mb-1">${key}</div>
                <div
                  class="preview-container"
                  style="
                      width: 100%;
                      aspect-ratio: 1;
                      display: flex;
                      align-items: center;
                      justify-content: center;
                      background: #fff;
                      border-radius: 8px;
                      overflow: hidden;
                    "
                >
                  ${(() => {
                    const decoder = new PatternDecoder(pattern.patternBase64!);
                    const cellCountX = decoder.getTileWidth();
                    const cellCountY = decoder.getTileHeight();
                    const cellSize = Math.floor(
                      this.buttonWidth / Math.max(cellCountX, cellCountY),
                    );

                    return html`
                      <div
                        style="
                            display: grid;
                            grid-template-columns: repeat(${cellCountX}, ${cellSize}px);
                            grid-template-rows: repeat(${cellCountY}, ${cellSize}px);
                            background-color: #ccc;
                            padding: 2px;
                            border-radius: 4px;
                          "
                      >
                        ${(() => {
                          const tiles: TemplateResult[] = [];
                          for (let py = 0; py < cellCountY; py++) {
                            for (let px = 0; px < cellCountX; px++) {
                              const x = px * decoder.getScale();
                              const y = py * decoder.getScale();
                              const bit = decoder.isSet(x, y);
                              tiles.push(html`
                                <div
                                  style="
                                    background-color: ${bit
                                    ? "#000"
                                    : "transparent"};
                                    border: 1px solid rgba(0, 0, 0, 0.1);
                                    width: ${cellSize}px;
                                    height: ${cellSize}px;
                                    border-radius: 1px;
                                  "
                                ></div>
                              `);
                            }
                          }
                          return tiles;
                        })()}
                      </div>
                    `;
                  })()}
                </div>
              </button>
            `;
          })}
        </div>
      </o-modal>
    `;
  }

  public open() {
    this.modalEl?.open();
  }

  public close() {
    this.modalEl?.close();
  }

  private selectPattern(patternKey: string) {
    this.selectedPattern = patternKey;
    TerritoryPatternStorage.setSelectedPattern(patternKey);
    this.updatePreview();
    this.close();
  }

  private updatePreview() {
    if (!this.previewButton || !this.selectedPattern) return;

    const pattern = territoryPatterns.patterns[this.selectedPattern];
    if (!pattern) return;

    const fixedHeight = 48;
    const fixedWidth = 48;
    const decoder = new PatternDecoder(pattern.patternBase64!);
    const cellCountX = decoder.getTileWidth();
    const cellCountY = decoder.getTileHeight();

    const cellSize = Math.min(
      fixedHeight / cellCountY,
      fixedWidth / cellCountX,
    );

    const previewHTML = html`
      <div
        style="
          display: flex;
          align-items: center;
          justify-content: center;
          height: ${fixedHeight}px;
          width: ${fixedWidth}px;
          background-color: #f0f0f0;
          border-radius: 4px;
          box-sizing: border-box;
          overflow: hidden;
          position: relative;
        "
      >
        <div
          style="
            display: grid;
            grid-template-columns: repeat(${cellCountX}, ${cellSize}px);
            grid-template-rows: repeat(${cellCountY}, ${cellSize}px);
            background-color: #ccc;
            padding: 2px;
            border-radius: 4px;
          "
        >
          ${(() => {
            const tiles: TemplateResult[] = [];
            for (let py = 0; py < cellCountY; py++) {
              for (let px = 0; px < cellCountX; px++) {
                const x = px * decoder.getScale();
                const y = py * decoder.getScale();
                const bit = decoder.isSet(x, y);
                tiles.push(html`
                  <div
                    style="
                      background-color: ${bit ? "#000" : "transparent"};
                      border: 1px solid rgba(0, 0, 0, 0.1);
                      width: ${cellSize}px;
                      height: ${cellSize}px;
                      border-radius: 1px;
                    "
                  ></div>
                `);
              }
            }
            return tiles;
          })()}
        </div>
      </div>
    `;

    render(previewHTML, this.previewButton);
  }

  private setLockedPatterns(
    lockedPatterns: string[],
    reasons: Record<string, string>,
  ) {
    this.lockedPatterns = lockedPatterns;
    this.lockedReasons = reasons;
  }

  private isPatternLocked(patternKey: string): boolean {
    return this.lockedPatterns.includes(patternKey);
  }

  private handleMouseEnter(patternKey: string, event: MouseEvent) {
    if (this.isPatternLocked(patternKey)) {
      this.hoveredPattern = patternKey;
      this.hoverPosition = { x: event.clientX, y: event.clientY };
    }
  }

  private handleMouseMove(event: MouseEvent) {
    if (this.hoveredPattern) {
      this.hoverPosition = { x: event.clientX, y: event.clientY };
    }
  }

  private handleMouseLeave() {
    this.hoveredPattern = null;
  }
}