/* app-utils.js — shared helpers for the Bergamo FSR demo */

(function () {
  'use strict';

  var FSR = window.FSR = window.FSR || {};

  FSR.utils = {
    assignedVisitSet: assignedVisitSet,
    buildCurl: buildCurl,
    clonePlan: clonePlan,
    fetchDemoCatalog: fetchDemoCatalog,
    fetchDemoPlan: fetchDemoPlan,
    fetchJobRoutes: fetchJobRoutes,
    findHeaderButton: findHeaderButton,
    formatDuration: formatDuration,
    iconForVisit: iconForVisit,
    legFor: legFor,
    locationLat: locationLat,
    locationLng: locationLng,
    maskContains: maskContains,
    routeBadges: routeBadges,
    routeSchedule: routeSchedule,
    routeStats: routeStats,
    timeLabel: timeLabel,
    title: title,
    toneForRoute: toneForRoute,
  };

  function buildCurl(method, path, json) {
    var parts = ['curl'];
    if (method && method !== 'GET') parts.push('-X', method);
    if (json) parts.push('-H', '"Content-Type: application/json"', '-d', '@plan.json');
    parts.push(window.location.origin + path);
    return parts.join(' ');
  }

  function fetchDemoCatalog() {
    return requestJson('/demo-data', 'demo data catalog').then(function (catalog) {
      if (!catalog || typeof catalog.defaultId !== 'string' || !Array.isArray(catalog.availableIds)) {
        throw new Error('demo data catalog is missing defaultId or availableIds');
      }
      return { defaultId: catalog.defaultId, availableIds: catalog.availableIds.slice() };
    });
  }

  function fetchDemoPlan(demoId) {
    return requestJson('/demo-data/' + encodeURIComponent(demoId), 'demo data "' + demoId + '"');
  }

  function fetchJobRoutes(jobId, snapshotRevision) {
    return requestJson(
      '/jobs/' + encodeURIComponent(jobId) + '/routes?snapshot_revision=' + encodeURIComponent(snapshotRevision),
      'route geometry for job "' + jobId + '"'
    );
  }

  function requestJson(path, label) {
    return fetch(path).then(function (response) {
      if (!response.ok) throw new Error(label + ' returned HTTP ' + response.status);
      return response.json();
    });
  }

  function routeSchedule(plan, route) {
    var visits = plan.service_visits || [];
    var entries = [];
    var clock = route.shift_start_minute;
    var previous = route.start_location_idx;

    (route.visits || []).forEach(function (visitIdx) {
      var visit = visits[visitIdx];
      if (!visit) return;
      var leg = legFor(plan, previous, visit.location_idx);
      clock += leg && leg.reachable ? Math.ceil((leg.duration_seconds || 0) / 60) : 0;
      if (clock < visit.earliest_minute) clock = visit.earliest_minute;
      var start = clock;
      var end = start + Math.max(0, visit.duration_minutes || 0);
      entries.push({ visit: visit, start: start, end: end });
      clock = end;
      previous = visit.location_idx;
    });

    return entries;
  }

  function routeStats(plan, route) {
    var visits = plan.service_visits || [];
    var travelMinutes = 0;
    var serviceMinutes = 0;
    var lateMinutes = 0;
    var overtimeMinutes = 0;
    var missingSkills = 0;
    var missingParts = 0;
    var unreachable = 0;
    var clock = route.shift_start_minute;
    var previous = route.start_location_idx;

    (route.visits || []).forEach(function (visitIdx) {
      var visit = visits[visitIdx];
      if (!visit) {
        unreachable += 1;
        return;
      }
      var leg = legFor(plan, previous, visit.location_idx);
      if (!leg || !leg.reachable) {
        unreachable += 1;
      } else {
        var legMinutes = Math.ceil((leg.duration_seconds || 0) / 60);
        travelMinutes += legMinutes;
        clock += legMinutes;
      }
      if (clock < visit.earliest_minute) clock = visit.earliest_minute;
      if (clock > visit.latest_minute) lateMinutes += clock - visit.latest_minute;
      if (!maskContains(route.skill_mask, visit.required_skill_mask)) missingSkills += 1;
      if (!maskContains(route.inventory_mask, visit.required_parts_mask)) missingParts += 1;
      serviceMinutes += Math.max(0, visit.duration_minutes || 0);
      clock += Math.max(0, visit.duration_minutes || 0);
      previous = visit.location_idx;
    });

    var returnLeg = legFor(plan, previous, route.end_location_idx);
    if (!returnLeg || !returnLeg.reachable) {
      unreachable += 1;
    } else {
      var returnMinutes = Math.ceil((returnLeg.duration_seconds || 0) / 60);
      travelMinutes += returnMinutes;
      clock += returnMinutes;
    }

    var routeMinutes = Math.max(0, clock - route.shift_start_minute);
    overtimeMinutes += Math.max(0, clock - route.shift_end_minute);
    overtimeMinutes += Math.max(0, routeMinutes - route.max_route_minutes);

    return {
      travelMinutes: travelMinutes,
      serviceMinutes: serviceMinutes,
      lateMinutes: lateMinutes,
      overtimeMinutes: overtimeMinutes,
      missingSkills: missingSkills,
      missingParts: missingParts,
      unreachable: unreachable,
    };
  }

  function legFor(plan, from, to) {
    var width = (plan.locations || []).length;
    var direct = (plan.travel_legs || [])[from * width + to];
    if (direct && direct.from_location_idx === from && direct.to_location_idx === to) {
      return direct;
    }
    return (plan.travel_legs || []).find(function (leg) {
      return leg.from_location_idx === from && leg.to_location_idx === to;
    });
  }

  function assignedVisitSet(routes) {
    var assigned = {};
    (routes || []).forEach(function (route) {
      (route.visits || []).forEach(function (visitIdx) {
        assigned[visitIdx] = route;
      });
    });
    return assigned;
  }

  function locationLat(location) {
    if (location.lat != null) return Number(location.lat);
    return Number(location.lat_e6 || 0) / 1000000;
  }

  function locationLng(location) {
    if (location.lng != null) return Number(location.lng);
    return Number(location.lng_e6 || 0) / 1000000;
  }

  function routeBadges(stats) {
    var badges = [];
    if (stats.unreachable) badges.push('Routing');
    if (stats.missingSkills) badges.push('Skills');
    if (stats.missingParts) badges.push('Parts');
    if (stats.lateMinutes) badges.push('Late');
    if (stats.overtimeMinutes) badges.push('Overtime');
    return badges.length ? badges : ['Feasible'];
  }

  function iconForVisit(visit) {
    if ((visit.required_skill_mask & 8) === 8) return 'fa-elevator';
    if ((visit.required_skill_mask & 4) === 4) return 'fa-faucet';
    if ((visit.required_skill_mask & 2) === 2) return 'fa-bolt';
    return 'fa-screwdriver-wrench';
  }

  function maskContains(available, required) {
    return ((available || 0) & (required || 0)) === (required || 0);
  }

  function toneForRoute(index) {
    return ['blue', 'emerald', 'amber', 'rose', 'violet', 'slate'][index % 6];
  }

  function formatDuration(minutes) {
    var value = Math.max(0, Math.round(minutes || 0));
    var h = Math.floor(value / 60);
    var m = value % 60;
    if (!h) return String(m) + 'm';
    return String(h) + 'h ' + String(m).padStart(2, '0') + 'm';
  }

  function timeLabel(minute) {
    var h = Math.floor(minute / 60);
    var m = minute % 60;
    return String(h).padStart(2, '0') + ':' + String(m).padStart(2, '0');
  }

  function findHeaderButton(header, label) {
    var buttons = header.querySelectorAll('button');
    for (var i = 0; i < buttons.length; i += 1) {
      if ((buttons[i].textContent || '').trim() === label) return buttons[i];
    }
    return null;
  }

  function clonePlan(data) {
    return JSON.parse(JSON.stringify(data));
  }

  function title(text) {
    return String(text || '')
      .replace(/_/g, ' ')
      .replace(/\b\w/g, function (match) { return match.toUpperCase(); });
  }
})();