'use strict';
// Personal reminder state and scheduling. Domain policy and display data are external.
globalThis.PersonalReminderEngine = class PersonalReminderEngine {
 constructor(config,storage,clock=()=>Date.now()){this.config=config;this.storage=storage;this.clock=clock;}
 read(){const raw=this.storage.getItem(this.config.storage_key);if(!raw)return {version:this.config.schema_version,items:[],settings:{...this.config.defaults}};const s=JSON.parse(raw);if(s.version!==this.config.schema_version||!Array.isArray(s.items)||!s.settings)throw Error('storage');return s;}
 write(s){this.storage.setItem(this.config.storage_key,JSON.stringify(s));return s;}
 clockParts(t){if(!/^\d{2}:\d{2}$/.test(t))throw Error('invalid');const a=t.split(':').map(Number);if(a[0]>23||a[1]>59)throw Error('invalid');return a;}
 localDay(t){const d=new Date(t);return [d.getFullYear(),d.getMonth(),d.getDate()].join('-');}
 recurringSpec(x){
  if(Number.isFinite(x.startAt)&&Number.isInteger(x.repeatEvery)&&x.repeatEvery>0&&this.config.repeat_units.includes(x.repeatUnit))return {startAt:x.startAt,every:x.repeatEvery,unit:x.repeatUnit};
  const [h,m]=this.clockParts(x.time),d=new Date(x.createdAt);d.setHours(h,m,0,0);
  if(x.frequency==='weekly')d.setDate(d.getDate()+(Number(x.weekday)-d.getDay()+7)%7);
  if(d.getTime()<x.createdAt)d.setDate(d.getDate()+(x.frequency==='weekly'?7:1));
  return {startAt:d.getTime(),every:1,unit:x.frequency==='weekly'?'week':'day'};
 }
 occurrence(spec,index){
  if(index<0)return null;const d=new Date(spec.startAt),n=index*spec.every;
  if(spec.unit==='minute')return spec.startAt+n*60000;
  if(spec.unit==='hour')return spec.startAt+n*3600000;
  if(spec.unit==='day'||spec.unit==='week'){d.setDate(d.getDate()+n*(spec.unit==='week'?7:1));return d.getTime();}
  const day=d.getDate();d.setDate(1);d.setMonth(d.getMonth()+n);d.setDate(Math.min(day,new Date(d.getFullYear(),d.getMonth()+1,0).getDate()));return d.getTime();
 }
 schedule(x,now){
  const spec=this.recurringSpec(x);if(now<spec.startAt)return {spec,index:-1,due:null,next:spec.startAt};let index;
  if(spec.unit==='minute'||spec.unit==='hour')index=Math.floor((now-spec.startAt)/(spec.every*(spec.unit==='minute'?60000:3600000)));
  else if(spec.unit==='month'){const a=new Date(spec.startAt),n=new Date(now);index=Math.max(0,Math.floor(((n.getFullYear()-a.getFullYear())*12+n.getMonth()-a.getMonth())/spec.every));}
  else index=Math.max(0,Math.floor((now-spec.startAt)/(spec.every*(spec.unit==='week'?7:1)*86400000)));
  while(index>0&&this.occurrence(spec,index)>now)index--;
  while(this.occurrence(spec,index+1)<=now)index++;
  return {spec,index,due:this.occurrence(spec,index),next:this.occurrence(spec,index+1)};
 }
 due(x,now){const s=this.schedule(x,now);return s.due??s.next;}
 next(x,now){return this.schedule(x,now).next;}
 timelineOccurrences(x,start,end){
  if(!(Number.isFinite(start)&&Number.isFinite(end)&&end>start))return [];
  if(x.mode==='recurring'){
   const schedule=this.schedule(x,start-1),result=[];let index=schedule.index+1,previous=-Infinity;
   while(true){const at=this.occurrence(schedule.spec,index++);if(!Number.isFinite(at)||at>=end||at<=previous)break;if(Number.isFinite(x.endAt)&&at>x.endAt)break;if(at>=start)result.push(at);previous=at;}
   return result;
  }
  let at=x.target;
  if(x.mode==='pomodoro'){
   // Keep the original appointment marker even as phases advance or finish.
   at=x.startAt;
   if(!Number.isFinite(at))at=x.phase==='waiting'?x.end:x.end-((x.session-1)*(x.work+x.rest)+x.work+(x.phase==='break'?x.rest:0))*60000;
  }
  return Number.isFinite(at)&&at>=start&&at<end?[at]:[];
 }
 tracksCompletion(x){return !this.config.religious_types.includes(x.type)&&x.mode==='one_time'&&this.config.completion_types.includes(x.type);}
 tracksStreak(x){return !this.config.religious_types.includes(x.type)&&x.mode==='recurring'&&this.config.streak_types.includes(x.type);}
 save(input,id){const c=this.config,now=this.clock(),s=this.read(),old=s.items.find(x=>x.id===id),mode=input.mode??old?.mode??c.type_behaviors[input.type];if(!c.enabled_types.includes(input.type)||!c.scheduling_modes.includes(mode))throw Error('invalid');
 const text=String(input.text||'').trim();if(!text||text.length>c.limits.text_length)throw Error('invalid');
 const x={id:old?.id||(globalThis.crypto?.randomUUID?.()||now.toString(36)+'-'+Math.random().toString(36).slice(2)),type:input.type,text,mode,createdAt:old?.createdAt||now};
 if(mode==='one_time'){x.target=Number(input.target);x.lead=Number(input.lead);if(!Number.isFinite(x.target)||x.target<=now||!Number.isFinite(x.lead)||x.lead<0||x.lead>c.limits.lead_minutes)throw Error('invalid');x.preDone=x.target-x.lead*60000<=now;x.dueDone=false;x.sound=input.sound===true;}
 if(mode==='recurring'){
  x.startAt=Number(input.startAt);x.repeatEvery=Number(input.repeatEvery);x.repeatUnit=String(input.repeatUnit||'');
  if(input.startAt==null||!Number.isFinite(x.startAt)||!Number.isInteger(x.repeatEvery)||x.repeatEvery<1||x.repeatEvery>c.limits.repeat_value||!c.repeat_units.includes(x.repeatUnit))throw Error('invalid');
  const previous=old?.mode==='recurring'?this.recurringSpec(old):null;
  const unchanged=previous&&previous.startAt===x.startAt&&previous.every===x.repeatEvery&&previous.unit===x.repeatUnit;
  x.sound=input.sound===true;x.lastNotified=unchanged?old.lastNotified??null:null;
  if(this.tracksStreak(x)){x.streak=unchanged&&this.tracksStreak(old)?old.streak||0:0;x.lastCompleted=unchanged&&this.tracksStreak(old)?old.lastCompleted??null:null;}
  if(unchanged&&old.notice)x.notice=old.notice;
 }
 if(mode==='pomodoro'){
  x.work=Number(input.work);x.rest=Number(input.rest);x.total=Number(input.total);
  if(![x.work,x.rest].every(n=>Number.isFinite(n)&&n>0&&n<=c.limits.duration_minutes)||!Number.isInteger(x.total)||x.total<1||x.total>c.limits.sessions)throw Error('invalid');
  const requested=input.startAt==null||input.startAt===''?null:Number(input.startAt);
  const unchanged=old?.mode==='pomodoro'&&old.work===x.work&&old.rest===x.rest&&old.total===x.total&&(requested===null||requested===old.startAt);
  if(unchanged){for(const key of ['startAt','phase','session','end','active','notice'])if(old[key]!==undefined)x[key]=old[key];}
  else{if(requested!==null&&(!Number.isFinite(requested)||requested<now))throw Error('invalid');x.startAt=requested??now;x.phase=x.startAt>now?'waiting':'work';x.session=1;x.end=x.phase==='waiting'?x.startAt:x.startAt+x.work*60000;x.active=true;}
  x.sound=input.sound===true;
 }
 const action=input.openQuran===undefined?old?.openQuran:input.openQuran;
 if(action!==undefined){if(!['','resume','wird'].includes(action))throw Error('invalid');x.openQuran=action;}
 const planId=input.quranPlanId??old?.quranPlanId;
 if(planId!==undefined){if(typeof planId!=='string'||!/^khatma-[a-z0-9-]+$/.test(planId))throw Error('invalid');x.quranPlanId=planId;}
 const endAt=input.endAt??old?.endAt;
 if(endAt!==undefined){if(mode!=='recurring'||!Number.isFinite(endAt)||endAt<x.startAt)throw Error('invalid');x.endAt=endAt;}
 if(old)s.items[s.items.indexOf(old)]=x;else s.items.push(x);this.write(s);return x;
 }
 remove(id){const s=this.read();s.items=s.items.filter(x=>x.id!==id);this.write(s);}
 complete(id){const s=this.read(),x=s.items.find(x=>x.id===id);if(!x)return;
 if(this.tracksCompletion(x)){s.items=s.items.filter(x=>x.id!==id);this.write(s);return;}
 if(!this.tracksStreak(x))return;
 const now=this.clock(),schedule=this.schedule(x,now),due=schedule.due;if(due==null||due<x.createdAt||x.lastCompleted===due)return;
 const prev=this.occurrence(schedule.spec,schedule.index-1);x.streak=x.lastCompleted===prev?x.streak+1:1;x.lastCompleted=due;x.lastNotified=due;delete x.notice;this.write(s);
 }
 snooze(id,option){const s=this.read(),x=s.items.find(x=>x.id===id),o=this.config.snooze_options.find(x=>x.id===option);if(!x||!o||x.mode!=='one_time')return;const now=this.clock();let target;
 if(o.mode==='duration')target=now+o.minutes*60000;else{const [h,m]=this.clockParts(s.settings[o.setting]);const d=new Date(now);d.setHours(h,m,0,0);if(o.mode==='next_day'||d.getTime()<=now)d.setDate(d.getDate()+1);target=d.getTime();}
 x.target=target;x.dueDone=false;x.preDone=target-x.lead*60000<=now;delete x.notice;this.write(s);
 }
 acknowledge(id){const s=this.read(),x=s.items.find(x=>x.id===id);if(x){delete x.notice;this.write(s);}}
 settings(values){const s=this.read();this.clockParts(values.evening_time);this.clockParts(values.tomorrow_time);const lead=Number(values.lead_minutes);if(!Number.isFinite(lead)||lead<0||lead>this.config.limits.lead_minutes)throw Error('invalid');s.settings={lead_minutes:lead,evening_time:values.evening_time,tomorrow_time:values.tomorrow_time,sound_enabled:values.sound_enabled===true};this.write(s);}
 tick(){const s=this.read(),now=this.clock();let changed=false;
 for(const x of s.items){
  if(Number.isFinite(x.endAt)&&now>x.endAt){if(x.notice){delete x.notice;changed=true;}continue;}
  if(x.mode==='one_time'){
   if(!x.dueDone&&now>=x.target){x.dueDone=true;x.preDone=true;x.notice='due';changed=true;}
   else if(x.lead>0&&!x.preDone&&now>=x.target-x.lead*60000){x.preDone=true;x.notice='pre';changed=true;}
  }else if(x.mode==='recurring'){
   const schedule=this.schedule(x,now),due=schedule.due;if(due!=null&&due>=x.createdAt&&(!this.tracksStreak(x)||x.lastCompleted!==due)&&x.lastNotified!==due){const prev=this.occurrence(schedule.spec,schedule.index-1);if(this.tracksStreak(x)&&x.lastCompleted!=null&&prev!=null&&x.lastCompleted<prev)x.streak=0;x.lastNotified=due;x.notice='due';changed=true;}
  }else if(x.mode==='pomodoro'&&x.active){
   let moved=false;
   while(x.active&&now>=x.end){moved=true;if(x.phase==='waiting'){x.phase='work';x.end+=x.work*60000;}else if(x.phase==='work'){
    if(x.session>=x.total){x.active=false;x.notice='finished';break;}
    x.phase='break';x.end+=x.rest*60000;
   }else{x.phase='work';x.session++;x.end+=x.work*60000;}}
   if(moved){if(x.active)x.notice=x.phase;changed=true;}
  }
 }
 if(changed)this.write(s);return s;
 }
}