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package handlers
import (
"testing"
"time"
"task-dashboard/internal/models"
)
func mustParseInLoc(t *testing.T, layout, value string, loc *time.Location) time.Time {
t.Helper()
parsed, err := time.ParseInLocation(layout, value, loc)
if err != nil {
t.Fatal(err)
}
return parsed
}
func TestComputeBudgetPeriod_SumsAvailabilityMinusOverlappingEvent(t *testing.T) {
loc := time.UTC
// A Wednesday: 2026-07-15 is a Wednesday.
day := mustParseInLoc(t, "2006-01-02", "2026-07-15", loc)
start := day
end := day.AddDate(0, 0, 1)
blocks := []models.AvailabilityBlock{
{ID: "b1", Weekday: int(day.Weekday()), StartTime: "18:00", EndTime: "20:00"}, // 120 min
}
events := []models.CalendarEvent{
{ID: "e1", Start: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 18:30", loc), End: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 19:00", loc)}, // 30 min overlap
}
status := ComputeBudgetPeriod(blocks, events, nil, nil, nil, start, end)
if status.AvailableMinutes != 90 {
t.Errorf("AvailableMinutes = %d, want 90 (120 - 30 overlap)", status.AvailableMinutes)
}
}
func TestComputeBudgetPeriod_EventFullyOutsideBlockDoesNotReduceIt(t *testing.T) {
loc := time.UTC
day := mustParseInLoc(t, "2006-01-02", "2026-07-15", loc)
start := day
end := day.AddDate(0, 0, 1)
blocks := []models.AvailabilityBlock{
{ID: "b1", Weekday: int(day.Weekday()), StartTime: "18:00", EndTime: "20:00"},
}
events := []models.CalendarEvent{
{ID: "e1", Start: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 09:00", loc), End: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 10:00", loc)},
}
status := ComputeBudgetPeriod(blocks, events, nil, nil, nil, start, end)
if status.AvailableMinutes != 120 {
t.Errorf("AvailableMinutes = %d, want 120 (event doesn't overlap the block)", status.AvailableMinutes)
}
}
func TestComputeBudgetPeriod_AvailableNeverGoesNegative(t *testing.T) {
loc := time.UTC
day := mustParseInLoc(t, "2006-01-02", "2026-07-15", loc)
start := day
end := day.AddDate(0, 0, 1)
blocks := []models.AvailabilityBlock{
{ID: "b1", Weekday: int(day.Weekday()), StartTime: "18:00", EndTime: "20:00"},
}
events := []models.CalendarEvent{
{ID: "e1", Start: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 17:00", loc), End: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 21:00", loc)},
}
status := ComputeBudgetPeriod(blocks, events, nil, nil, nil, start, end)
if status.AvailableMinutes != 0 {
t.Errorf("AvailableMinutes = %d, want 0 (event fully covers the block)", status.AvailableMinutes)
}
}
func TestComputeBudgetPeriod_OverlappingEventsUnionNotSummed(t *testing.T) {
loc := time.UTC
// A Wednesday: 2026-07-15 is a Wednesday.
day := mustParseInLoc(t, "2006-01-02", "2026-07-15", loc)
start := day
end := day.AddDate(0, 0, 1)
blocks := []models.AvailabilityBlock{
{ID: "b1", Weekday: int(day.Weekday()), StartTime: "18:00", EndTime: "20:00"}, // 120 min
}
events := []models.CalendarEvent{
// Event A: 18:00-19:00 (60 min overlap with block)
{ID: "e1", Start: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 18:00", loc), End: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 19:00", loc)},
// Event B: 18:30-19:30 (60 min overlap with block), overlapping event A from 18:30-19:00.
{ID: "e2", Start: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 18:30", loc), End: mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 19:30", loc)},
}
// Union of busy time is 18:00-19:30 = 90 min, so available should be
// 120 - 90 = 30. A sum-based (rather than union-based) implementation
// would incorrectly compute 120 - 60 - 60 = 0.
status := ComputeBudgetPeriod(blocks, events, nil, nil, nil, start, end)
if status.AvailableMinutes != 30 {
t.Errorf("AvailableMinutes = %d, want 30 (120 - 90 union of overlapping events, not 120 - 60 - 60)", status.AvailableMinutes)
}
}
func TestComputeBudgetPeriod_MultiDayWindowSumsPerMatchingWeekdayAndExcludesEnd(t *testing.T) {
loc := time.UTC
// 2026-07-13 is a Monday, 2026-07-14 Tuesday, 2026-07-15 Wednesday,
// 2026-07-16 Thursday, 2026-07-17 Friday.
start := mustParseInLoc(t, "2006-01-02", "2026-07-13", loc) // Monday
end := mustParseInLoc(t, "2006-01-02", "2026-07-17", loc) // Friday (exclusive)
monday := int(time.Monday)
wednesday := int(time.Wednesday)
thursday := int(time.Thursday)
friday := int(time.Friday)
blocks := []models.AvailabilityBlock{
// Occurs once, on 07-13 (Monday) -- 60 min.
{ID: "mon", Weekday: monday, StartTime: "09:00", EndTime: "10:00"},
// Occurs once, on 07-15 (Wednesday) -- 90 min.
{ID: "wed", Weekday: wednesday, StartTime: "08:00", EndTime: "09:30"},
// Occurs once, on 07-16 (Thursday) -- 60 min.
{ID: "thu", Weekday: thursday, StartTime: "12:00", EndTime: "13:00"},
// Weekday matches `end` (07-17, Friday) itself, which is one day
// PAST the last iterated day (07-16). If the loop incorrectly
// iterated through (or including) `end`, this block would wrongly
// contribute 60 more minutes.
{ID: "fri-at-end", Weekday: friday, StartTime: "09:00", EndTime: "10:00"},
}
// No events, so no overlap to subtract.
status := ComputeBudgetPeriod(blocks, nil, nil, nil, nil, start, end)
want := 60 + 90 + 60 // Monday + Wednesday + Thursday; Friday-at-end excluded.
if status.AvailableMinutes != want {
t.Errorf("AvailableMinutes = %d, want %d (60 Mon + 90 Wed + 60 Thu; the Friday block at `end` must not be counted)", status.AvailableMinutes, want)
}
}
func TestComputeBudgetPeriod_OnlySumsTrackedIncompleteTasksDueInWindow(t *testing.T) {
loc := time.UTC
start := mustParseInLoc(t, "2006-01-02", "2026-07-15", loc)
end := start.AddDate(0, 0, 1)
due := mustParseInLoc(t, "2006-01-02 15:04", "2026-07-15 12:00", loc)
outsideWindow := end.AddDate(0, 0, 5)
tasks := []models.Task{
{ID: "t-tracked-project", ProjectID: "p1", EstimatedMinutes: 30, DueDate: &due},
{ID: "t-tracked-label", Labels: []string{"errands"}, EstimatedMinutes: 20, DueDate: &due},
{ID: "t-untracked", ProjectID: "p2", EstimatedMinutes: 999, DueDate: &due},
{ID: "t-completed", ProjectID: "p1", EstimatedMinutes: 999, DueDate: &due, Completed: true},
{ID: "t-outside-window", ProjectID: "p1", EstimatedMinutes: 999, DueDate: &outsideWindow},
}
trackedProjects := map[string]bool{"p1": true}
trackedLabels := map[string]bool{"errands": true}
status := ComputeBudgetPeriod(nil, nil, tasks, trackedProjects, trackedLabels, start, end)
if status.ScheduledMinutes != 50 {
t.Errorf("ScheduledMinutes = %d, want 50 (30 + 20, excluding untracked/completed/out-of-window)", status.ScheduledMinutes)
}
}
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