/* Local-only capture gates; no request, scoring, or report recommendation logic. */
(function(root, factory) {
  if (typeof module === 'object' && module.exports) module.exports = factory(require('./head-pose.js'));
  else root.CaptureQuality = factory(root.HeadPose);
})(typeof window !== 'undefined' ? window : this, function(HeadPose) {
  'use strict';
  // Real-phone feedback: ease alignment and normal hand/head movement while
  // retaining two checked preview frames, one face and framing. No JPEG recheck.
  var config = Object.freeze({ version: '2026-10-16-preview-only-v11', score: 0.3, frontScore: 0.25,
    near: 0.30, far: 0.68, center: 0.16, edge: 0.01,
    dark: 110, bright: 220, holdMs: 450, minFrames: 2, maxGapMs: 2000,
    yawDrift: 8, pitchDrift: 8, centerDrift: 0.055, sizeDrift: 0.065 });
  function finite(v) { return typeof v === 'number' && isFinite(v); }
  function scoreThreshold(target) { return target === 'front' ? config.frontScore : config.score; }
  function evaluate(d, options) {
    var failed = function(hint, reason) { return { ok: false, hint: hint, reason: reason || 'quality' }; };
    if (!d) return failed('未检测到人脸');
    if (options.count !== 1) return failed('请保持单人出镜');
    var box = d.detection.box, w = options.width, h = options.height;
    if (!box || ![box.x, box.y, box.width, box.height, w, h].every(finite) || w <= 0 || h <= 0 || box.width <= 0 || box.height <= 0) return failed('请将脸部完整移入取景框');
    var ratio = box.height / h;
    if (!finite(d.detection.score) || d.detection.score < scoreThreshold(options.target)) return failed('请保持面部清晰');
    if (ratio < config.near) return failed('请靠近一点');
    if (ratio > config.far) return failed('请远一点');
    if (box.x < w * config.edge || box.y < h * config.edge || box.x + box.width > w * (1 - config.edge) || box.y + box.height > h * (1 - config.edge)) return failed('请将脸部完整移入取景框');
    if (!finite(options.offsetX) || Math.abs(options.offsetX) > config.center) return failed('请将脸部移入取景框');
    var pose;
    try { pose = HeadPose.estimate(d.landmarks.positions, options.mirrored); } catch (_) { return failed('请正对屏幕'); }
    if (!pose) return failed('请正对屏幕');
    // System-camera files may already be mirrored. Retain the established
    // direction-agnostic fallback, but apply the same angle/pitch/roll limits.
    var target = options.target;
    if (options.ignoreDirection && target !== 'front') target = pose.yaw < 0 ? 'left' : 'right';
    var check = HeadPose.check(d.landmarks.positions, target, options.mirrored);
    if (!check.ok) return failed(check.hint, finite(check.yaw) ? 'angle' : 'quality');
    // Lighting is advisory for both live frames and saved JPEGs, never a gate.
    var warning = finite(options.luma) && options.luma < config.dark ? '建议到光线明亮处拍摄' :
      finite(options.luma) && options.luma > config.bright ? '光线过强，建议避开强光' : '';
    return { ok: true, hint: '保持不动', warning: warning, observation: { yaw: pose.yaw, pitch: pose.pitch, roll: pose.roll,
      score: d.detection.score, luma: finite(options.luma) ? options.luma : null, ratio: ratio,
      center_x: (box.x + box.width / 2) / w, center_y: (box.y + box.height / 2) / h } };
  }
  function hold(state, observation, now) {
    if (!observation) return { ready: false, state: null };
    var reset = !state || now - state.lastAt > config.maxGapMs || now < state.lastAt;
    if (!reset) {
      var a = state.anchor, b = observation;
      reset = Math.abs(a.yaw - b.yaw) > config.yawDrift || Math.abs(a.pitch - b.pitch) > config.pitchDrift ||
        Math.abs(a.center_x - b.center_x) > config.centerDrift || Math.abs(a.center_y - b.center_y) > config.centerDrift || Math.abs(a.ratio - b.ratio) > config.sizeDrift;
    }
    var next = reset ? { since: now, lastAt: now, frames: 1, anchor: observation } :
      { since: state.since, lastAt: now, frames: state.frames + 1, anchor: state.anchor };
    return { state: next, ready: now - next.since >= config.holdMs && next.frames >= config.minFrames };
  }
  return { config: config, scoreThreshold: scoreThreshold, evaluate: evaluate, hold: hold };
});