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import { ticks } from "./analytics-logic.js";
import { attemptsDomain, formatAttemptDuration, formatPower } from "./climb-attempts-logic.js";
import { resolveOfficialProfileColors } from "./official-climb-profile.js";
import type { ClimbAttemptPoint, OfficialProfileColors } from "./types.js";
interface Plot {
left: number;
right: number;
top: number;
bottom: number;
}
interface AttemptsChartState {
canvas: HTMLCanvasElement;
points: ClimbAttemptPoint[];
colors: OfficialProfileColors;
output: HTMLOutputElement;
hoveredIndex: number;
}
const POINT_RADIUS = 4;
const HOVER_RADIUS = 7;
const HIT_RADIUS = 12;
const draw = (state: AttemptsChartState): void => {
const { canvas, points, colors } = state;
const rect = canvas.getBoundingClientRect();
if (rect.width === 0 || rect.height === 0) return;
const context = canvas.getContext("2d");
if (!context) return;
const ratio = window.devicePixelRatio || 1;
canvas.width = Math.floor(rect.width * ratio);
canvas.height = Math.floor(rect.height * ratio);
context.setTransform(ratio, 0, 0, ratio, 0, 0);
const plot: Plot = { left: 44, right: rect.width - 16, top: 16, bottom: rect.height - 30 };
const domain = attemptsDomain(points);
const xForDuration = (durationS: number): number => plot.left + (durationS / domain.maxDurationS) * (plot.right - plot.left);
const yForPower = (powerW: number): number => plot.bottom - (powerW / domain.maxPowerW) * (plot.bottom - plot.top);
context.clearRect(0, 0, rect.width, rect.height);
context.fillStyle = colors.plotSurface;
context.fillRect(0, 0, rect.width, rect.height);
context.font = "11px system-ui, sans-serif";
context.lineWidth = 1;
// Duration ticks step in minutes so labels stay round.
for (const tick of ticks(0, domain.maxDurationS / 60)) {
const x = xForDuration(tick * 60);
context.strokeStyle = colors.grid;
context.beginPath();
context.moveTo(x, plot.top);
context.lineTo(x, plot.bottom);
context.stroke();
context.fillStyle = colors.subtle;
context.textAlign = "center";
context.textBaseline = "top";
context.fillText(formatAttemptDuration(tick * 60), x, plot.bottom + 8);
}
for (const tick of ticks(0, domain.maxPowerW)) {
const y = yForPower(tick);
context.strokeStyle = colors.grid;
context.beginPath();
context.moveTo(plot.left, y);
context.lineTo(plot.right, y);
context.stroke();
context.fillStyle = colors.subtle;
context.textAlign = "right";
context.textBaseline = "middle";
context.fillText(formatPower(tick), plot.left - 8, y);
}
for (let index = 0; index < points.length; index++) {
const point = points[index];
context.fillStyle = colors.accent;
context.beginPath();
context.arc(xForDuration(point.durationS), yForPower(point.averagePowerW), POINT_RADIUS, 0, 2 * Math.PI);
context.fill();
if (index === state.hoveredIndex) {
context.strokeStyle = colors.accent;
context.lineWidth = 2;
context.beginPath();
context.arc(xForDuration(point.durationS), yForPower(point.averagePowerW), HOVER_RADIUS, 0, 2 * Math.PI);
context.stroke();
}
}
};
const nearestPoint = (state: AttemptsChartState, x: number, y: number): number => {
const { canvas, points } = state;
const rect = canvas.getBoundingClientRect();
const plot: Plot = { left: 44, right: rect.width - 16, top: 16, bottom: rect.height - 30 };
const domain = attemptsDomain(points);
let nearest = -1;
let best = Infinity;
for (let index = 0; index < points.length; index++) {
const point = points[index];
const dx = plot.left + (point.durationS / domain.maxDurationS) * (plot.right - plot.left) - x;
const dy = plot.bottom - (point.averagePowerW / domain.maxPowerW) * (plot.bottom - plot.top) - y;
const distance = Math.hypot(dx, dy);
if (distance < best) {
best = distance;
nearest = index;
}
}
return best <= HIT_RADIUS ? nearest : -1;
};
const setHovered = (state: AttemptsChartState, index: number): void => {
if (index === state.hoveredIndex) return;
state.hoveredIndex = index;
if (index < 0) {
state.output.textContent = "Hover a point to inspect an attempt.";
} else {
const point = state.points[index];
state.output.textContent = `${point.date} · ${point.rideName} · ${formatAttemptDuration(point.durationS)} · ${formatPower(point.averagePowerW)} · click for details`;
}
draw(state);
};
const bindEvents = (state: AttemptsChartState): void => {
state.canvas.addEventListener("pointermove", (event: PointerEvent) => {
const rect = state.canvas.getBoundingClientRect();
const index = nearestPoint(state, event.clientX - rect.left, event.clientY - rect.top);
state.canvas.style.cursor = index >= 0 ? "pointer" : "default";
setHovered(state, index);
});
state.canvas.addEventListener("pointerleave", () => {
state.canvas.style.cursor = "default";
setHovered(state, -1);
});
state.canvas.addEventListener("pointercancel", () => setHovered(state, -1));
state.canvas.addEventListener("click", () => {
if (state.hoveredIndex < 0) return;
window.open(state.points[state.hoveredIndex].url, "_blank", "noopener");
});
};
const init = (): void => {
const payloadElement = document.getElementById("climb-attempt-points");
const canvas = document.querySelector<HTMLCanvasElement>("[data-climb-attempts-chart]");
const output = document.querySelector<HTMLOutputElement>("[data-attempts-hover]");
if (!payloadElement || !canvas || !output) return;
const points = JSON.parse(payloadElement.textContent ?? "[]") as ClimbAttemptPoint[];
if (points.length === 0) return;
const state: AttemptsChartState = { canvas, points, colors: resolveOfficialProfileColors(), output, hoveredIndex: -1 };
draw(state);
bindEvents(state);
window.addEventListener("resize", () => draw(state));
};
init();
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