const {test} = require('node:test');
const assert = require('node:assert/strict');
const vm = require('node:vm');
const fs = require('node:fs');
function setup(responses = [{ok:true}], confirm = true) {
    const handlers = {}, calls = [], messages = [];
    let reloads = 0;
    const card = {dataset:{moveId:'8',version:'4',start:'2026-10-20T08:00:00',end:'2026-10-20T09:00:00',segmentStart:'2026-10-20T08:00:00'},classList:{add(){},remove(){}},getBoundingClientRect:()=>({top:196})};
    const day = {dataset:{date:'2026-10-21'},classList:{add(){},remove(){}},getBoundingClientRect:()=>({top:100})};
    const host = {dataset:{firstHour:'7'},addEventListener:(name,fn)=>{handlers[name]=fn;},querySelectorAll:()=>[]};
    vm.runInNewContext(fs.readFileSync('static/js/case-slot-move.js','utf8'),{
        document:{getElementById:()=>host},
        window:{confirm:()=>confirm,showCaseFeedback:message=>messages.push(message),loadEmbeddedCasePlanner:async()=>{reloads++;}},
        fetch:async(url,options)=>{calls.push({url,body:JSON.parse(options.body)});const r=responses.shift();return {...r,json:async()=>r.body||{}};},
    });
    const event = (target,y) => ({target:{closest:selector=>selector==='.case-slot-resize'?null:target},clientY:y,preventDefault(){},stopPropagation(){},dataTransfer:{setData(){}}});
    return {handlers,calls,messages,card,day,event,reloads:()=>reloads};
}
test('move to another day and time preserves duration and version',async()=>{
    const s=setup();
    s.handlers.dragstart(s.event(s.card,208)); // Grab 7.5 minutes below start.
    await s.handlers.drop(s.event(s.day,400));
    assert.equal(s.calls[0].url,'/api/v1/planner/allocations/8');
    assert.equal(s.calls[0].body.version,4);
    const start=new Date(s.calls[0].body.starts_at),end=new Date(s.calls[0].body.ends_at);
    assert.equal(start.getDate(),21);
    assert.equal(start.getHours(),10);
    assert.equal(start.getMinutes(),0);
    assert.equal(end-start,3600000);
    assert.equal(s.reloads(),1);
});
test('cancelled drag and unrelated drops do not write',async()=>{
    const s=setup();
    s.handlers.dragstart(s.event(s.card,196));
    s.handlers.dragend();
    await s.handlers.drop(s.event(s.day,400));
    assert.equal(s.calls.length,0);
});
test('overlap can be confirmed; stale version is never forced',async()=>{
    const s=setup([{ok:false,status:409,body:{detail:{message:'Overlap',conflict_status:'overlap'}}},{ok:true}]);
    s.handlers.dragstart(s.event(s.card,196));
    await s.handlers.drop(s.event(s.day,400));
    assert.equal(s.calls.length,2);
    assert.equal(s.calls[1].body.confirm_conflicts,true);
    const stale=setup([{ok:false,status:409,body:{detail:{message:'Ændret af anden bruger',current:{version:5}}}}]);
    stale.handlers.dragstart(stale.event(stale.card,196));
    await stale.handlers.drop(stale.event(stale.day,400));
    assert.equal(stale.calls.length,1);
    assert.equal(stale.messages[0],'Ændret af anden bruger');
});
test('declining overlap restores server state',async()=>{
    const s=setup([{ok:false,status:409,body:{detail:{message:'Overlap',conflict_status:'overlap'}}}],false);
    s.handlers.dragstart(s.event(s.card,196));
    await s.handlers.drop(s.event(s.day,400));
    assert.equal(s.calls.length,1);
    assert.equal(s.reloads(),1);
    assert.equal(s.messages[0],'Overlap');
});