1 files changed, 123 insertions, 0 deletions
diff --git a/web/frontend/ride-detail-boundaries.ts b/web/frontend/ride-detail-boundaries.ts
new file mode 100644
index 0000000..22a1255
--- /dev/null
+++ b/web/frontend/ride-detail-boundaries.ts
@@ -0,0 +1,123 @@
+import { climbMetrics, formatDistance, formatElevation } from "./ride-detail-logic.js";
+import { requireElement } from "./dom.js";
+import type { BoundarySource, BoundaryTarget, ClimbBounds, RideProfilePoint } from "./types.js";
+
+interface ActiveBoundary {
+  form: HTMLFormElement;
+  target: BoundaryTarget;
+  source: BoundarySource;
+}
+
+interface RideBoundaryControllerOptions {
+  forms: HTMLFormElement[];
+  points: RideProfilePoint[];
+  climbBounds: ClimbBounds[];
+  onBoundaryChanged: (index: number) => void;
+  onPointSelected: (index: number) => void;
+  setMessage: (message: string) => void;
+}
+
+export class RideBoundaryController {
+  private readonly forms: HTMLFormElement[];
+  private readonly points: RideProfilePoint[];
+  private readonly climbBounds: ClimbBounds[];
+  private readonly onBoundaryChanged: (index: number) => void;
+  private readonly onPointSelected: (index: number) => void;
+  private readonly setMessage: (message: string) => void;
+  private activeBoundary: ActiveBoundary | null;
+
+  constructor({ forms, points, climbBounds, onBoundaryChanged, onPointSelected, setMessage }: RideBoundaryControllerOptions) {
+    this.forms = forms;
+    this.points = points;
+    this.climbBounds = climbBounds;
+    this.onBoundaryChanged = onBoundaryChanged;
+    this.onPointSelected = onPointSelected;
+    this.setMessage = setMessage;
+    this.activeBoundary = null;
+    this.initialize();
+  }
+
+  initialize(): void {
+    for (const form of this.forms) {
+      const item = form.closest<HTMLElement>("[data-climb-item]");
+      if (!item) continue;
+      const climbIndex = Number.parseInt(item.dataset.climbIndex ?? "", 10);
+      this.climbBounds[climbIndex] = {
+        startIndex: Number.parseInt(
+          requireElement(form.querySelector<HTMLInputElement>('[data-boundary-input="start"]'), "start boundary input").value,
+          10,
+        ),
+        endIndex: Number.parseInt(
+          requireElement(form.querySelector<HTMLInputElement>('[data-boundary-input="end"]'), "end boundary input").value,
+          10,
+        ),
+      };
+      this.updatePreview(form);
+      const buttons = [...form.querySelectorAll<HTMLElement>("[data-boundary-button]")];
+      for (const button of buttons) {
+        button.addEventListener("click", () => {
+          this.clearSelection();
+          this.activeBoundary = {
+            form,
+            target: button.dataset.boundaryButton as BoundaryTarget,
+            source: button.dataset.boundarySource as BoundarySource,
+          };
+          button.classList.add("active");
+          const surface = this.activeBoundary.source === "map" ? "map" : "profile";
+          this.setMessage(`Click the ${surface} to select the ${this.activeBoundary.target} point.`);
+        });
+      }
+    }
+  }
+
+  isSelecting(source: BoundarySource): boolean {
+    return this.activeBoundary?.source === source;
+  }
+
+  clearSelection(): void {
+    this.activeBoundary = null;
+    for (const form of this.forms) {
+      for (const button of form.querySelectorAll("[data-boundary-button]")) button.classList.remove("active");
+    }
+  }
+
+  choosePoint(index: number): void {
+    if (!this.activeBoundary) return;
+    const { form, target } = this.activeBoundary;
+    const item = form.closest<HTMLElement>("[data-climb-item]");
+    if (!item) return;
+    const climbIndex = Number.parseInt(item.dataset.climbIndex ?? "", 10);
+    const input = requireElement(form.querySelector<HTMLInputElement>(`[data-boundary-input="${target}"]`), `${target} boundary input`);
+    const output = requireElement(form.querySelector<HTMLOutputElement>(`[data-boundary-output="${target}"]`), `${target} boundary output`);
+    input.value = String(index);
+    output.textContent = this.boundaryLabel(index);
+    if (target === "start") this.climbBounds[climbIndex].startIndex = index;
+    else this.climbBounds[climbIndex].endIndex = index;
+    this.updatePreview(form);
+    this.onBoundaryChanged(climbIndex);
+    this.clearSelection();
+    this.onPointSelected(index);
+  }
+
+  updatePreview(form: HTMLFormElement): void {
+    const preview = requireElement(form.querySelector<HTMLElement>("[data-boundary-preview]"), "boundary preview");
+    const item = form.closest<HTMLElement>("[data-climb-item]");
+    if (!item) return;
+    const climbIndex = Number.parseInt(item.dataset.climbIndex ?? "", 10);
+    const metrics = climbMetrics(this.points, this.climbBounds[climbIndex]);
+    if (!metrics) {
+      preview.textContent = "Choose an end point after the start point.";
+      return;
+    }
+    const summary = requireElement(item.querySelector<HTMLElement>("[data-climb-summary]"), "climb summary");
+    const metricsOutput = requireElement(item.querySelector<HTMLElement>("[data-climb-metrics]"), "climb metrics");
+    summary.textContent = `${formatDistance(metrics.start.distanceKm)}–${formatDistance(metrics.end.distanceKm)}`;
+    metricsOutput.textContent = `${metrics.category} · ${formatDistance(metrics.distanceKm)} at ${metrics.slope.toFixed(1)}% · Cotacol ${metrics.cotacol.toFixed(1)}`;
+    preview.textContent = `Preview: ${formatDistance(metrics.distanceKm)} · ${metrics.elevationGain >= 0 ? "+" : ""}${formatElevation(metrics.elevationGain)} · ${metrics.slope.toFixed(1)}% · Cotacol ${metrics.cotacol.toFixed(1)}`;
+  }
+
+  boundaryLabel(index: number): string {
+    const point = this.points[index];
+    return `${formatDistance(point.distanceKm)} · ${formatElevation(point.elevationM)}`;
+  }
+}