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package handlers
import (
"log"
"net/http"
"strconv"
"time"
"task-dashboard/internal/config"
"task-dashboard/internal/models"
)
// TimelineData holds grouped timeline items for the template
type TimelineData struct {
TodayItems []models.TimelineItem
TomorrowItems []models.TimelineItem
LaterItems []models.TimelineItem
Start time.Time
Days int
// Section labels with day of week
TodayLabel string // e.g., "Today - Monday"
TomorrowLabel string // e.g., "Tomorrow - Tuesday"
LaterLabel string // e.g., "Wednesday, Jan 29"
// Calendar view bounds (1 hour before first event, 1 hour after last)
TodayStartHour int
TodayEndHour int
TodayHours []int // Slice of hours to render
TomorrowStartHour int
TomorrowEndHour int
TomorrowHours []int
// Current time for "now" line
NowHour int
NowMinute int
}
// HandleTimeline renders the timeline view
func (h *Handler) HandleTimeline(w http.ResponseWriter, r *http.Request) {
// Parse query params
startStr := r.URL.Query().Get("start")
daysStr := r.URL.Query().Get("days")
var start time.Time
if startStr != "" {
parsed, err := config.ParseDateInDisplayTZ(startStr)
if err == nil {
start = parsed
} else {
start = config.Today()
}
} else {
start = config.Today()
}
days := 3 // Default
if daysStr != "" {
if d, err := strconv.Atoi(daysStr); err == nil && d > 0 {
days = d
}
}
end := start.AddDate(0, 0, days)
// Refresh calendar events cache before building timeline
if _, err := h.fetchCalendarEvents(r.Context(), false); err != nil {
log.Printf("Warning: failed to fetch calendar events: %v", err)
}
// Call BuildTimeline
items, err := BuildTimeline(r.Context(), h.store, h.googleTasksClient, start, end)
if err != nil {
JSONError(w, http.StatusInternalServerError, "Failed to build timeline", err)
return
}
// Compute section labels with day of week
now := config.Now()
today := config.Today()
tomorrow := today.AddDate(0, 0, 1)
dayAfterTomorrow := today.AddDate(0, 0, 2)
// Group items by day section
data := TimelineData{
Start: start,
Days: days,
TodayLabel: "Today - " + now.Format("Monday"),
TomorrowLabel: "Tomorrow - " + tomorrow.Format("Monday"),
LaterLabel: dayAfterTomorrow.Format("Monday, Jan 2") + "+",
NowHour: now.Hour(),
NowMinute: now.Minute(),
}
for _, item := range items {
switch item.DaySection {
case models.DaySectionToday:
data.TodayItems = append(data.TodayItems, item)
case models.DaySectionTomorrow:
data.TomorrowItems = append(data.TomorrowItems, item)
case models.DaySectionLater:
data.LaterItems = append(data.LaterItems, item)
}
}
// Calculate calendar bounds for Today (1 hour buffer before/after timed events)
data.TodayStartHour, data.TodayEndHour = calcCalendarBounds(data.TodayItems, now.Hour())
for h := data.TodayStartHour; h <= data.TodayEndHour; h++ {
data.TodayHours = append(data.TodayHours, h)
}
// Calculate calendar bounds for Tomorrow
data.TomorrowStartHour, data.TomorrowEndHour = calcCalendarBounds(data.TomorrowItems, -1)
for h := data.TomorrowStartHour; h <= data.TomorrowEndHour; h++ {
data.TomorrowHours = append(data.TomorrowHours, h)
}
HTMLResponse(w, h.renderer, "timeline-tab", data)
}
// calcCalendarBounds returns start/end hours for calendar view based on timed events.
// If currentHour >= 0, it's included in the range (for "now" line visibility).
// Returns hours clamped to 0-23 with 1-hour buffer before/after events.
func calcCalendarBounds(items []models.TimelineItem, currentHour int) (startHour, endHour int) {
minHour := 23
maxHour := 0
hasTimedEvents := false
for _, item := range items {
// Skip all-day/overdue items (midnight with no real time)
if item.IsAllDay || item.IsOverdue {
continue
}
h := item.Time.Hour()
// Skip midnight items unless they have an end time
if h == 0 && item.Time.Minute() == 0 && item.EndTime == nil {
continue
}
hasTimedEvents = true
if h < minHour {
minHour = h
}
endH := h
if item.EndTime != nil {
endH = item.EndTime.Hour()
}
if endH > maxHour {
maxHour = endH
}
}
// Include current hour if provided
if currentHour >= 0 {
hasTimedEvents = true
if currentHour < minHour {
minHour = currentHour
}
if currentHour > maxHour {
maxHour = currentHour
}
}
if !hasTimedEvents {
// Default: show 8am-6pm
return 8, 18
}
// Add 1 hour buffer, clamp to valid range
startHour = minHour - 1
if startHour < 0 {
startHour = 0
}
endHour = maxHour + 1
if endHour > 23 {
endHour = 23
}
return startHour, endHour
}
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