compass_teams_nhs/internal/parse/parse_test.go

package parse

import (
	"context"
	"encoding/json"
	"strings"
	"testing"
	"time"

	// Embed the zone database so the tests can use Australia/Melbourne.
	_ "time/tzdata"
)

// melbourne is the family timezone used in the tests.
func melbourne(t *testing.T) *time.Location {
	t.Helper()
	loc, err := time.LoadLocation("Australia/Melbourne")
	if err != nil {
		t.Fatalf("load location: %v", err)
	}
	return loc
}

// tasksFixture mirrors the malformed ExtJS grid: the group header <td> is not
// closed before the group's inner table, exactly as Compass emits it.
const tasksFixture = `<html><body>
<table class="x-gridview-1-table x-grid-table"><tbody>
<tr class="x-grid-row x-grid-wrap-row x-grid-group-row"><td class="x-group-hd-container" colspan="4">
  <div class="x-grid-group-hd x-grid-group-hd-collapsible"><div class="x-grid-group-title" style="">
    <a href="/Records/User.aspx?userId=999">Test Child</a> - <a href="/Organise/Subjects/Subject.aspx?subjectId=1&amp;openLearningTaskTab">11EENG 11 ENGLISH</a>
  </div></div>
  <table class="x-gridview-1-table x-grid-table"><tbody>
    <tr class="x-grid-row x-grid-data-row">
      <td class="x-grid-cell"><div class="x-grid-cell-inner"><div><div><div style="display:flex;">
        <span class="task-details-category-label" style="background-color:#F17056">Assessment</span>
        <span class="learning-task-title"><a class="task-submission-launcher" data-qtip="Essay draft">Essay draft</a></span></div>
        <span data-qtip="This is a Class Learning Task."><span class="learning-task-datafield-title">Class Task</span></span> | <span data-qtip="report"><span class="learning-task-datafield-title">Report: </span><span class="learning-task-datafield-value">Yes</span></span>
      </div></div></div></td>
      <td class="x-grid-cell"><div class="x-grid-cell-inner">
        <span data-qtip="due soon"><span class="learning-task-datafield-title">Due date: </span><span class="learning-task-datafield-value">19/10/26 04:00 PM</span></span><br>
        <span data-qtip="pending"><span class="learning-task-datafield-title">Submitted: </span><span class="learning-task-datafield-value"><img src="/Assets/Pending.png"> Pending</span></span>
      </div></td>
      <td class="x-grid-cell"><div class="x-grid-cell-inner"><div class="learning-task-row-value-large">-</div></div></td>
      <td class="x-grid-cell"><div class="x-grid-cell-inner"><img src="/Assets/tools.png"></div></td>
    </tr>
    <tr class="x-grid-row x-grid-row-alt x-grid-data-row">
      <td class="x-grid-cell"><div class="x-grid-cell-inner"><div><div><div style="display:flex;">
        <span class="task-details-category-label">Homework</span>
        <span class="learning-task-title"><a class="task-submission-launcher" data-qtip="Chapter 4 questions">Chapter 4 questions</a></span></div>
        <span data-qtip="Subject-wide"><span class="learning-task-datafield-title">Subject-wide Task</span></span>
      </div></div></div></td>
      <td class="x-grid-cell"><div class="x-grid-cell-inner">
        <span data-qtip="overdue"><span class="learning-task-datafield-title">Due date: </span><span class="learning-task-datafield-value">09/10/26 04:00 PM</span></span><br>
        <span data-qtip="overdue"><span class="learning-task-datafield-title">Submitted: </span><span class="learning-task-datafield-value"><img src="/Assets/Overdue.png"> Overdue</span></span>
      </div></td>
      <td class="x-grid-cell"><div class="x-grid-cell-inner"><div class="learning-task-row-value-large">-</div></div></td>
      <td class="x-grid-cell"><div class="x-grid-cell-inner"><img src="/Assets/tools.png"></div></td>
    </tr>
  </tbody></table>
</td></tr>
</tbody></table>
</body></html>`

func TestParseLearningTasks(t *testing.T) {
	loc := melbourne(t)
	items, err := parseLearningTasks("Harry", Page{
		Slug: PageLearningTasks,
		URL:  "https://nhs-vic.compass.education/Records/UserNew.aspx#learningTasks",
		HTML: []byte(tasksFixture),
	}, loc)
	if err != nil {
		t.Fatalf("parseLearningTasks: %v", err)
	}
	if len(items) != 2 {
		t.Fatalf("got %d items, want 2", len(items))
	}

	first := items[0]
	if first.Type != TypeTask {
		t.Errorf("type = %q, want %q", first.Type, TypeTask)
	}
	if first.Subject != "11EENG 11 ENGLISH" {
		t.Errorf("subject = %q", first.Subject)
	}
	if first.Title != "Essay draft" {
		t.Errorf("title = %q", first.Title)
	}
	if !strings.Contains(first.Body, "Category: Assessment") || !strings.Contains(first.Body, "Task: Class Task") {
		t.Errorf("body = %q", first.Body)
	}
	if first.DueAt == nil || first.DueAt.Format("2006-01-02 15:04") != "2026-10-19 16:00" {
		t.Errorf("due = %v", first.DueAt)
	}
	if !strings.Contains(first.URL, "userId=999") || !strings.HasSuffix(first.URL, "#learningTasks") {
		t.Errorf("url = %q", first.URL)
	}
	if first.SourcePage != PageLearningTasks {
		t.Errorf("source page = %q", first.SourcePage)
	}
	if first.ExternalRef == "" {
		t.Error("empty external ref")
	}

	second := items[1]
	if second.DueAt == nil || second.DueAt.Format("2006-01-02") != "2026-10-09" {
		t.Errorf("second due = %v", second.DueAt)
	}
	if second.ExternalRef == first.ExternalRef {
		t.Error("two tasks share an external ref")
	}

	// Re-parsing must produce the same references, so the store de-duplicates.
	again, err := parseLearningTasks("Harry", Page{Slug: PageLearningTasks, HTML: []byte(tasksFixture)}, loc)
	if err != nil {
		t.Fatalf("re-parse: %v", err)
	}
	if again[0].ExternalRef != first.ExternalRef {
		t.Errorf("external ref not stable: %q vs %q", again[0].ExternalRef, first.ExternalRef)
	}
}

const newsFixture = `<html><body>
<div data-testid="feed-toolbar"><p>News</p></div>
<div class="MuiPaper-root"><div class="MuiCardContent-root">
  <span class="MuiTypography-root MuiTypography-dialogMdStrong css-1">T Smith</span>
  <span class="MuiTypography-root MuiTypography-dialogSmStrong css-2" aria-label="14/10/2026 09:00 AM">1 day ago</span>
  <span class="postTitle css-3"><span class="">Health Information</span></span>
  <div class="froala-viewer"><p>Dear families, there is a notice.</p></div>
</div></div>
</body></html>`

func TestParseNews(t *testing.T) {
	loc := melbourne(t)
	items, err := parseNews("Harry", Page{Slug: PageHome, URL: "https://nhs-vic.compass.education/", HTML: []byte(newsFixture)}, loc)
	if err != nil {
		t.Fatalf("parseNews: %v", err)
	}
	if len(items) != 1 {
		t.Fatalf("got %d items, want 1", len(items))
	}
	it := items[0]
	if it.Type != TypeMessage {
		t.Errorf("type = %q", it.Type)
	}
	if it.Title != "Health Information" {
		t.Errorf("title = %q", it.Title)
	}
	if it.Teacher != "T Smith" {
		t.Errorf("author = %q", it.Teacher)
	}
	if !strings.Contains(it.Body, "Dear families") {
		t.Errorf("body = %q", it.Body)
	}
	if it.DueAt == nil || it.DueAt.Format("2006-01-02 15:04") != "2026-10-14 09:00" {
		t.Errorf("posted = %v", it.DueAt)
	}
}

const calendarFixture = `<html><body>
<table class="ext-cal"><tbody><tr><td class="ext-cal-day-col"><div class="ext-cal-day-col-inner">
<div id="calendar-manager-week-bd-day-col-20261015" class="ext-cal-day-col-gutter" style="height:1200px;">
  <div class="calendar-manager-week-bd-evt-a calendar-event-1001 custom-event ext-cal-evt activity-type-2 ext-event-no-roll" style="left:0%;width:100%;top:900px;height:149px;background-color:#ccffcc;">
    <span class="ext-evt-bd" lang="en-GB">6:00: End of Year Concert - HALL - KSH</span>
  </div>
  <div class="calendar-manager-week-bd-evt-b calendar-event-1002 custom-event ext-cal-evt activity-type-1 ext-event-no-roll" style="left:0%;width:100%;top:705px;height:48px;">
    <span class="ext-evt-bd" lang="en-GB">2:06: 5 - 11HLEGB5 - D8 - LHT</span>
  </div>
</div>
</div></td></tr></tbody></table>
</body></html>`

func TestParseCalendar(t *testing.T) {
	loc := melbourne(t)
	items, err := parseCalendar("Harry", Page{Slug: PageCalendar, URL: "https://nhs-vic.compass.education/Organise/Calendar/", HTML: []byte(calendarFixture)}, loc)
	if err != nil {
		t.Fatalf("parseCalendar: %v", err)
	}
	if len(items) != 2 {
		t.Fatalf("got %d items, want 2", len(items))
	}
	if items[0].Type != TypeEvent {
		t.Errorf("type = %q", items[0].Type)
	}
	if got := items[0].DueAt.Format("2006-01-02 15:04"); got != "2026-10-15 18:00" {
		t.Errorf("event 1 time = %s", got)
	}
	if items[0].Title != "End of Year Concert - HALL - KSH" {
		t.Errorf("event 1 title = %q", items[0].Title)
	}
	if items[1].Subject != "11HLEGB5" || items[1].Teacher != "LHT" {
		t.Errorf("event 2 subject/teacher = %q/%q", items[1].Subject, items[1].Teacher)
	}
	if got := items[1].DueAt.Format("15:04"); got != "14:06" {
		t.Errorf("event 2 time = %q", got)
	}
}

// TestParseFailsLoudly proves FR-12: a challenge or login page must not be read
// as "nothing due".
func TestParseFailsLoudly(t *testing.T) {
	challenge := []byte(`<html><head><title>Just a moment...</title></head><body><h1>Just a moment...</h1></body></html>`)

	if _, err := parseNews("Harry", Page{Slug: PageHome, HTML: challenge}, time.UTC); err == nil {
		t.Error("parseNews accepted a challenge page")
	}
	if _, err := parseLearningTasks("Harry", Page{Slug: PageLearningTasks, HTML: challenge}, time.UTC); err == nil {
		t.Error("parseLearningTasks accepted a page with no grid")
	}
	if _, err := parseCalendar("Harry", Page{Slug: PageCalendar, HTML: challenge}, time.UTC); err == nil {
		t.Error("parseCalendar accepted a page with no grid")
	}
	if _, err := Parse("Harry", []Page{{Slug: "unknown", HTML: challenge}}, time.UTC); err == nil {
		t.Error("Parse accepted a page set with no recognised page")
	}
}

func TestParseCompassDue(t *testing.T) {
	loc := melbourne(t)
	cases := []struct {
		in   string
		want string
	}{
		{"19/10/26 04:00 PM", "2026-10-19 16:00"},
		{"09/10/26 04:00 PM", "2026-10-09 16:00"},
		{"No due date", ""},
		{"", ""},
	}
	for _, tc := range cases {
		got, err := parseCompassDue(tc.in, loc)
		if err != nil {
			t.Errorf("parseCompassDue(%q): %v", tc.in, err)
			continue
		}
		if tc.want == "" {
			if got != nil {
				t.Errorf("parseCompassDue(%q) = %v, want nil", tc.in, got)
			}
			continue
		}
		if got == nil || got.Format("2006-01-02 15:04") != tc.want {
			t.Errorf("parseCompassDue(%q) = %v, want %s", tc.in, got, tc.want)
		}
	}
	if _, err := parseCompassDue("tomorrow", loc); err == nil {
		t.Error("parseCompassDue accepted an unknown format")
	}
}

// stubCompleter returns a fixed reply.
type stubCompleter struct {
	reply string
	err   error
	calls int
}

func (s *stubCompleter) Complete(context.Context, string, string) (string, error) {
	s.calls++
	if s.err != nil {
		return "", s.err
	}
	return s.reply, nil
}

func TestClassifyModel(t *testing.T) {
	items := []Item{
		{Type: TypeTask, Title: "Essay", DueAt: ptr(time.Date(2026, 10, 9, 16, 0, 0, 0, time.UTC))},
		{Type: TypeMessage, Title: "Notice"},
	}
	reply, _ := json.Marshal([]map[string]any{
		{"i": 0, "importance": "high"},
		{"i": 1, "importance": "low"},
	})
	c := &stubCompleter{reply: "```json\n" + string(reply) + "\n```"}
	if err := ClassifyModel(context.Background(), c, items, "test-model", time.Date(2026, 10, 15, 9, 0, 0, 0, time.UTC)); err != nil {
		t.Fatalf("ClassifyModel: %v", err)
	}
	if items[0].Importance != importanceHigh || items[1].Importance != importanceLow {
		t.Errorf("labels = %q/%q", items[0].Importance, items[1].Importance)
	}

	bad := &stubCompleter{reply: `[{"i":0,"importance":"urgent"}]`}
	if err := ClassifyModel(context.Background(), bad, items[:1], "test-model", time.Now()); err == nil {
		t.Error("ClassifyModel accepted an invalid label")
	}
}

func TestClassifyDeterministic(t *testing.T) {
	now := time.Date(2026, 10, 15, 9, 0, 0, 0, time.UTC)
	overdue := now.Add(-24 * time.Hour)
	nextWeek := now.Add(48 * time.Hour)
	items := []Item{
		{Type: TypeTask, Title: "overdue", DueAt: &overdue},
		{Type: TypeTask, Title: "soon", DueAt: &nextWeek},
		{Type: TypeMessage, Title: "plain"},
	}
	ClassifyDeterministic(items, now)
	if items[0].Importance != importanceHigh || items[1].Importance != importanceHigh {
		t.Errorf("overdue/soon = %q/%q", items[0].Importance, items[1].Importance)
	}
	if items[2].Importance != importanceNormal {
		t.Errorf("plain = %q", items[2].Importance)
	}
}

func ptr(t time.Time) *time.Time { return &t }

// TestClassifyDeterministicEvents proves the Phase 6 importance rule: a school
// event is important, a routine class period is not.
func TestClassifyDeterministicEvents(t *testing.T) {
	now := time.Date(2026, 10, 15, 9, 0, 0, 0, time.UTC)
	at := now.Add(4 * time.Hour)
	items := []Item{
		{Type: TypeEvent, Title: "End of Year Senior Music Concert - HALL - KSH", DueAt: &at},
		{Type: TypeEvent, Title: "Year 11 Assembly - HALL - CMA", DueAt: &at},
		{Type: TypeEvent, Title: "5 - 11HLEGB5 - D8 - LHT", DueAt: &at},
		{Type: TypeEvent, Title: "C - 11TUTB - M6 - ANE", DueAt: &at},
		{Type: TypeEvent, Title: "RLE GROUP D - IM1 - RLE", DueAt: &at},
	}
	ClassifyDeterministic(items, now)
	for i, want := range []string{importanceHigh, importanceHigh, importanceNormal, importanceNormal, importanceNormal} {
		if items[i].Importance != want {
			t.Errorf("items[%d] %q = %q, want %q", i, items[i].Title, items[i].Importance, want)
		}
	}
}

// tasksJSONFixture is the shape of GetAllLearningTasksByUserId: a wrapper with
// the per-child tasks. Task 1 is overdue and carries its due date at the task
// level; task 2 is on time and carries it on the student; task 3 belongs to the
// sibling and must be skipped.
const tasksJSONFixture = `{"d":{"total":3,"data":[
  {"id":12657,"name":"SAC 6: Human Rights Presentation","activityName":"","subjectName":"11HLEG 11 HUMANITIES - LEGAL STUDIES","groupName":"11HLEG","dueDateTimestamp":"2026-10-09T05:00:00Z","students":[{"userId":27038,"userName":"Harrison ROLFE","submissionStatus":2,"dueDateTimestamp":"","submittedTimestamp":""}]},
  {"id":14268,"name":"Unit 1 English Exam","activityName":"11EENG","subjectName":"11EENG 11 ENGLISH - ENGLISH","groupName":"11EENG","dueDateTimestamp":"","students":[{"userId":27038,"userName":"Harrison ROLFE","submissionStatus":3,"dueDateTimestamp":"2026-06-22T05:09:00Z","submittedTimestamp":"2026-06-22T05:08:00Z"}]},
  {"id":99999,"name":"Finn task","activityName":"","subjectName":"7MAT","groupName":"7MAT","dueDateTimestamp":"","students":[{"userId":31460,"userName":"Finn ROLFE","submissionStatus":2}]}
]}}`

// homeOverdueFixture carries the parent home-page summary link for user 27038.
const homeOverdueFixture = `<html><body>
<div data-testid="feed-toolbar"></div>
<h5>Harrison ROLFE</h5>
<div class="parentChildActions-learningTaskItems">
  <div><a href="Records/User.aspx?userId=27038#learningTasks">1 overdue learning task</a></div>
  <div><a href="Records/User.aspx?userId=27038#learningTasks">1 learning task due in the next week</a></div>
</div>
</body></html>`

func TestParseLearningTasksAll(t *testing.T) {
	loc := melbourne(t)
	got, err := parseLearningTasksAll("Harry", Page{
		Slug:   PageLearningTasksAll,
		UserID: "27038",
		JSON:   []byte(tasksJSONFixture),
	}, loc)
	if err != nil {
		t.Fatalf("parseLearningTasksAll: %v", err)
	}
	if len(got.items) != 2 {
		t.Fatalf("got %d items, want 2 (the sibling's row is skipped)", len(got.items))
	}
	if got.overdue != 1 {
		t.Errorf("overdue = %d, want 1", got.overdue)
	}
	if got.total != 3 {
		t.Errorf("total = %d, want 3", got.total)
	}
	if !strings.Contains(got.items[0].Body, "Status: Overdue") {
		t.Errorf("overdue body = %q", got.items[0].Body)
	}
	if got.items[0].DueAt == nil || got.items[0].DueAt.Format("2006-01-02 15:04") != "2026-10-09 16:00" {
		t.Errorf("task-level due = %v", got.items[0].DueAt)
	}
	if got.items[1].DueAt == nil || got.items[1].DueAt.Format("2006-01-02 15:04") != "2026-06-22 15:09" {
		t.Errorf("student-level due = %v", got.items[1].DueAt)
	}
	if got.items[0].ExternalRef == got.items[1].ExternalRef {
		t.Error("two tasks share an external ref")
	}
	if OverdueCount(got.items) != 1 {
		t.Errorf("OverdueCount = %d, want 1", OverdueCount(got.items))
	}
}

// TestParseReconcilesOverdueWithHome proves FR-12: the parser refuses to store a
// task list whose overdue count disagrees with the home page summary.
func TestParseReconcilesOverdueWithHome(t *testing.T) {
	loc := melbourne(t)
	jsonPage := Page{Slug: PageLearningTasksAll, UserID: "27038", JSON: []byte(tasksJSONFixture)}
	homePage := Page{Slug: PageHome, HTML: []byte(homeOverdueFixture)}

	if _, err := Parse("Harry", []Page{homePage, jsonPage}, loc); err != nil {
		t.Fatalf("Parse with matching counts: %v", err)
	}

	mismatch := strings.Replace(homeOverdueFixture, "1 overdue learning task", "6 overdue learning tasks", 1)
	if _, err := Parse("Harry", []Page{{Slug: PageHome, HTML: []byte(mismatch)}, jsonPage}, loc); err == nil {
		t.Fatal("Parse accepted a task list that disagrees with the home page (FR-12)")
	}

	blank := `<html><body><div data-testid="feed-toolbar"></div></body></html>`
	if _, err := Parse("Harry", []Page{{Slug: PageHome, HTML: []byte(blank)}, jsonPage}, loc); err == nil {
		t.Fatal("Parse accepted a home page with no record of the child (FR-12)")
	}
}