// Zeichnet die statische Buero-Szene (Phase 2, siehe Visualization.md Abschnitt 9) als
// Vanilla-SVG in den Container #office-scene. Keine Animation, keine Klick-Interaktion
// (Board-/Monitor-Modals kommen erst mit den Live-Daten in Phase 3/4). Reine DOM-Glue-Logik -
// die eigentliche Layoutberechnung steckt testbar in office-scene.js.

import {
  ROLES,
  buildBoardColumnLayout,
  buildDeskLayout,
  buildSystemTiles,
  buildEventLines,
} from "./office-scene.js";
import {
  DEMO_TICKET_COUNTS,
  DEMO_AGENTS,
  DEMO_SYSTEMS,
  DEMO_EVENTS,
  DEMO_KPI_PLACEHOLDER,
} from "./demo-data.js";

const SVG_NS = "http://www.w3.org/2000/svg";

const VIEW_W = 1920;
const VIEW_H = 1080;
const WALL_BAND_H = 420;

const BOARD_FRAME = { x: 60, y: 40, w: 1120, h: 340 };
const MONITOR_WALL = { x: 1240, y: 40, w: 620, h: 340 };
const DOOR = { w: 40, h: 220, y: 700 };
const DESK = { w: 220, h: 110 };
const DESK_ROW_Y = [540, 840];
const DESK_COL_X = [232, 644, 1056, 1468];

const NOTE_W = 96;
const NOTE_H = 50;
const NOTE_STEP_Y = 56;

function el(tag, attrs = {}, children = []) {
  const node = document.createElementNS(SVG_NS, tag);
  for (const [key, value] of Object.entries(attrs)) {
    node.setAttribute(key, value);
  }
  for (const child of children) {
    node.appendChild(child);
  }
  return node;
}

function text(content, attrs = {}) {
  const node = el("text", attrs);
  node.textContent = content;
  return node;
}

function renderRoom() {
  const g = el("g", { class: "office-room" });
  g.appendChild(el("rect", { x: 0, y: 0, width: VIEW_W, height: VIEW_H, class: "floor" }));
  g.appendChild(el("rect", { x: 0, y: 0, width: VIEW_W, height: WALL_BAND_H, class: "wall" }));
  g.appendChild(el("rect", { x: 0, y: 0, width: 40, height: VIEW_H, class: "wall wall-side" }));
  g.appendChild(el("rect", { x: VIEW_W - 40, y: 0, width: 40, height: VIEW_H, class: "wall wall-side" }));
  g.appendChild(el("rect", { x: 0, y: DOOR.y, width: DOOR.w, height: DOOR.h, class: "door" }));
  g.appendChild(
    el("rect", { x: VIEW_W - DOOR.w, y: DOOR.y, width: DOOR.w, height: DOOR.h, class: "door" })
  );
  return g;
}

function renderStackBadge(x, y, count) {
  const g = el("g", { class: "note-stack" });
  // Mehrere leicht versetzte Zettel als "Stapel"-Andeutung, darueber die Anzahl (F3).
  [6, 3, 0].forEach((offset, i) => {
    g.appendChild(
      el("rect", {
        x: x - offset,
        y: y - offset,
        width: NOTE_W,
        height: NOTE_H,
        rx: 6,
        class: `note note-stack-layer-${i}`,
      })
    );
  });
  const cx = x + NOTE_W / 2;
  const cy = y + NOTE_H / 2;
  g.appendChild(el("circle", { cx, cy, r: 20, class: "note-stack-badge" }));
  g.appendChild(
    text(String(count), { x: cx, y: cy + 7, class: "note-stack-count", "text-anchor": "middle" })
  );
  return g;
}

function renderBoard(ticketCounts) {
  const columns = buildBoardColumnLayout(ticketCounts);
  const g = el("g", { class: "board" });
  g.appendChild(
    el("rect", { ...BOARD_FRAME, rx: 10, class: "board-frame" })
  );
  g.appendChild(
    text("Kanban-Board", { x: BOARD_FRAME.x + 16, y: BOARD_FRAME.y - 14, class: "wall-label" })
  );

  const columnWidth = BOARD_FRAME.w / columns.length;

  columns.forEach((column, index) => {
    const columnX = BOARD_FRAME.x + index * columnWidth;
    const colGroup = el("g", { class: `board-column board-column-${column.key}` });

    if (index > 0) {
      colGroup.appendChild(
        el("line", {
          x1: columnX,
          y1: BOARD_FRAME.y,
          x2: columnX,
          y2: BOARD_FRAME.y + BOARD_FRAME.h,
          class: "board-column-divider",
        })
      );
    }

    colGroup.appendChild(
      text(column.label, {
        x: columnX + columnWidth / 2,
        y: BOARD_FRAME.y + 26,
        class: "board-column-label",
        "text-anchor": "middle",
      })
    );

    const noteX = columnX + (columnWidth - NOTE_W) / 2;
    let noteY = BOARD_FRAME.y + 44;

    for (let i = 0; i < column.visibleNotes; i++) {
      colGroup.appendChild(
        el("rect", { x: noteX, y: noteY, width: NOTE_W, height: NOTE_H, rx: 6, class: "note" })
      );
      noteY += NOTE_STEP_Y;
    }

    if (column.stackCount > 0) {
      colGroup.appendChild(renderStackBadge(noteX, noteY, column.stackCount));
    }

    g.appendChild(colGroup);
  });

  return g;
}

function renderEventMonitor(frame, events) {
  const lines = buildEventLines(events);
  const g = el("g", { class: "monitor monitor-events" });
  g.appendChild(el("rect", { ...frame, rx: 8, class: "monitor-frame" }));
  g.appendChild(text("Events", { x: frame.x + 12, y: frame.y - 10, class: "wall-label" }));
  g.appendChild(
    el("rect", {
      x: frame.x + 10,
      y: frame.y + 10,
      width: frame.w - 20,
      height: frame.h - 20,
      class: "monitor-screen",
    })
  );

  lines.forEach((eventLine, index) => {
    g.appendChild(
      text(`${eventLine.time} ${eventLine.system}: ${eventLine.message}`, {
        x: frame.x + 18,
        y: frame.y + 38 + index * 26,
        class: `monitor-event-line severity-${eventLine.severity}`,
      })
    );
  });

  return g;
}

function renderSystemMonitor(frame, systems) {
  const tiles = buildSystemTiles(systems);
  const g = el("g", { class: "monitor monitor-systems" });
  g.appendChild(el("rect", { ...frame, rx: 8, class: "monitor-frame" }));
  g.appendChild(text("Systeme", { x: frame.x + 12, y: frame.y - 10, class: "wall-label" }));
  g.appendChild(
    el("rect", {
      x: frame.x + 10,
      y: frame.y + 10,
      width: frame.w - 20,
      height: frame.h - 20,
      class: "monitor-screen",
    })
  );

  const cols = 3;
  const tileMargin = 8;
  const gridX = frame.x + 18;
  const gridY = frame.y + 18;
  const tileSize = (frame.w - 36 - tileMargin * (cols - 1)) / cols;

  tiles.forEach((system, index) => {
    const col = index % cols;
    const row = Math.floor(index / cols);
    const tileX = gridX + col * (tileSize + tileMargin);
    const tileY = gridY + row * (tileSize + tileMargin);

    const tileGroup = el("g", { class: `system-tile status-${system.status}` });
    tileGroup.appendChild(
      el("rect", { x: tileX, y: tileY, width: tileSize, height: tileSize, rx: 6, class: "system-tile-bg" })
    );
    // Einfaches "Server"-Icon: zwei Balken mit je einer Status-Leuchte (F6: ein Icon-Typ
    // fuer alle Systeme, unabhaengig von der Art).
    tileGroup.appendChild(
      el("rect", { x: tileX + 10, y: tileY + 10, width: tileSize - 20, height: 14, rx: 2, class: "system-tile-bar" })
    );
    tileGroup.appendChild(
      el("rect", { x: tileX + 10, y: tileY + 30, width: tileSize - 20, height: 14, rx: 2, class: "system-tile-bar" })
    );
    tileGroup.appendChild(el("circle", { cx: tileX + 18, cy: tileY + 17, r: 3, class: "system-tile-led" }));
    tileGroup.appendChild(el("circle", { cx: tileX + 18, cy: tileY + 37, r: 3, class: "system-tile-led" }));
    tileGroup.appendChild(
      text(system.name, {
        x: tileX + tileSize / 2,
        y: tileY + tileSize - 8,
        class: "system-tile-label",
        "text-anchor": "middle",
      })
    );
    g.appendChild(tileGroup);
  });

  return g;
}

function renderKpiMonitor(frame, placeholder) {
  const g = el("g", { class: "monitor monitor-kpi" });
  g.appendChild(el("rect", { ...frame, rx: 8, class: "monitor-frame" }));
  g.appendChild(text("KPIs", { x: frame.x + 12, y: frame.y - 10, class: "wall-label" }));
  g.appendChild(
    el("rect", {
      x: frame.x + 10,
      y: frame.y + 10,
      width: frame.w - 20,
      height: frame.h - 20,
      class: "monitor-screen monitor-screen-placeholder",
    })
  );
  const words = placeholder.split(" ");
  const lineHeight = 22;
  const maxCharsPerLine = 16;
  const lines = [];
  let current = "";
  for (const word of words) {
    const candidate = current ? `${current} ${word}` : word;
    if (candidate.length > maxCharsPerLine && current) {
      lines.push(current);
      current = word;
    } else {
      current = candidate;
    }
  }
  if (current) lines.push(current);

  const startY = frame.y + frame.h / 2 - ((lines.length - 1) * lineHeight) / 2;
  lines.forEach((line, index) => {
    g.appendChild(
      text(line, {
        x: frame.x + frame.w / 2,
        y: startY + index * lineHeight,
        class: "monitor-placeholder-text",
        "text-anchor": "middle",
      })
    );
  });

  return g;
}

function renderMonitorWall(systems, events) {
  const g = el("g", { class: "monitor-wall" });
  const gap = 20;
  const monitorWidth = (MONITOR_WALL.w - gap * 2) / 3;
  const frames = [0, 1, 2].map((i) => ({
    x: MONITOR_WALL.x + i * (monitorWidth + gap),
    y: MONITOR_WALL.y,
    w: monitorWidth,
    h: MONITOR_WALL.h,
  }));

  g.appendChild(renderEventMonitor(frames[0], events));
  g.appendChild(renderSystemMonitor(frames[1], systems));
  g.appendChild(renderKpiMonitor(frames[2], DEMO_KPI_PLACEHOLDER));

  return g;
}

function personPose(pose) {
  // Rein statische Pose-Auswahl (kein Animationszustand) - Zustandsmaschine/Animation
  // folgt erst in Phase 5.
  switch (pose) {
    case "reading_newspaper":
      return "pose-newspaper";
    case "coffee":
      return "pose-coffee";
    case "working":
      return "pose-working";
    default:
      return "pose-idle";
  }
}

function renderDesk({ deskIndex, agent }) {
  const col = deskIndex % DESK_COL_X.length;
  const row = Math.floor(deskIndex / DESK_COL_X.length);
  const x = DESK_COL_X[col];
  const y = DESK_ROW_Y[row];

  const role = agent ? ROLES[agent.role] : null;
  const g = el("g", {
    class: `desk ${agent ? "desk-occupied" : "desk-empty"}`,
    transform: `translate(${x}, ${y})`,
  });

  g.appendChild(el("rect", { x: 0, y: 40, width: DESK.w, height: DESK.h, rx: 6, class: "desk-table" }));
  g.appendChild(
    el("rect", { x: 20, y: 10, width: 60, height: 40, rx: 4, class: `desk-screen ${agent ? personPose(agent.pose) : ""}` })
  );
  g.appendChild(el("circle", { cx: DESK.w / 2, cy: 40 + DESK.h + 30, r: 22, class: "desk-chair" }));

  if (role) {
    // Deko-Icon je Rolle (F1): Stern (Entwickler:in), Bluete (Product Owner:in), Haken (QA).
    if (role.deco === "star") {
      g.appendChild(
        el("path", {
          d: "M170,20 l4,10 11,0 -9,7 3,11 -9,-7 -9,7 3,-11 -9,-7 11,0 z",
          class: "desk-deco desk-deco-star",
        })
      );
    } else if (role.deco === "flower") {
      const cx = 175;
      const cy = 22;
      g.appendChild(
        el("g", { class: "desk-deco desk-deco-flower" }, [
          el("circle", { cx: cx - 7, cy, r: 6 }),
          el("circle", { cx: cx + 7, cy, r: 6 }),
          el("circle", { cx, cy: cy - 7, r: 6 }),
          el("circle", { cx, cy: cy + 7, r: 6 }),
          el("circle", { cx, cy, r: 4, class: "desk-deco-flower-center" }),
        ])
      );
    } else if (role.deco === "check") {
      g.appendChild(
        el("path", { d: "M162,24 l8,8 16,-18", class: "desk-deco desk-deco-check" })
      );
    }

    g.appendChild(
      el("circle", { cx: DESK.w / 2, cy: 40 + DESK.h + 30 - 34, r: 16, class: "person-head" })
    );
    g.appendChild(
      el("rect", {
        x: DESK.w / 2 - 22,
        y: 40 + DESK.h + 30 - 20,
        width: 44,
        height: 34,
        rx: 12,
        class: "person-body",
        style: `--role-color: ${role.accentColor}`,
      })
    );
    g.appendChild(
      text(agent.name, {
        x: DESK.w / 2,
        y: 40 + DESK.h + 74,
        class: "desk-name",
        "text-anchor": "middle",
      })
    );
  } else {
    g.appendChild(
      text("frei", {
        x: DESK.w / 2,
        y: 40 + DESK.h + 74,
        class: "desk-name desk-name-empty",
        "text-anchor": "middle",
      })
    );
  }

  return g;
}

function renderDesks(agents) {
  const g = el("g", { class: "desks" });
  buildDeskLayout(agents).forEach((desk) => g.appendChild(renderDesk(desk)));
  return g;
}

export function renderOfficeScene(container, data = {}) {
  const {
    ticketCounts = DEMO_TICKET_COUNTS,
    agents = DEMO_AGENTS,
    systems = DEMO_SYSTEMS,
    events = DEMO_EVENTS,
  } = data;

  const svg = el("svg", {
    viewBox: `0 0 ${VIEW_W} ${VIEW_H}`,
    class: "office-svg",
    role: "img",
    "aria-label": "Buero-Visualisierung mit Kanban-Board, Monitor-Wand und Schreibtischen",
  });

  svg.appendChild(renderRoom());
  svg.appendChild(renderBoard(ticketCounts));
  svg.appendChild(renderMonitorWall(systems, events));
  svg.appendChild(renderDesks(agents));

  container.replaceChildren(svg);
}

document.addEventListener("DOMContentLoaded", () => {
  const container = document.getElementById("office-scene");
  if (container) {
    renderOfficeScene(container);
  }
});