[string] $dtHost = $ENV:DONETICKHOST
[string] $dtPort = $ENV:DONETICKPORT
[string] $dtAPIKey = $ENV:DONETICKAPIKEY
[string] $appriseWebhookURL = $ENV:APPRISEWEBHOOKURL
[string] $appriseWebhookTag = $ENV:APPRISEWEBHOOKTAG
[int[]]  $notificationTimes = $ENV:NOTIFICATIONTIMES | Sort-Object


function Send-Notification
{
    param(
        # Title of the notification
        [Parameter(Mandatory=$true)]
        [string]
        $title,

        # Content of the notification
        [Parameter(Mandatory=$true)]
        [string]
        $content
    )

    $headers = @{
        "Content-Type"="application/json"
    }
    $body = @{
        title=$title
        body=$content
        tags="$appriseWebhookTag"
    }
    $json = $body | ConvertTo-Json
    try {
        Invoke-WebRequest -URI $appriseWebhookURL -Method post -Body $json -Headers $headers
    }
    catch {
        Write-Host "Notification Error Encountered: $($global:Error[0])"
    }
}

function Get-Chores
{
    try {
        $headers = @{
            secretkey = $dtAPIKey
        }
        $results = Invoke-WebRequest -Uri "https://$dtHost`:$dtPort/eapi/v1/chore" -Method Get -Headers $headers
        return ($results.Content | ConvertFrom-Json)
    }
    catch {
        Write-Error "Error fetching chores: $($global:Error[0])"
    }
}

while ($true) {
    $today = (Get-Date "23:59:59")
    $chores = Get-Chores
    
    $overdueTasks = @()
    $todaysTasks = @()
    
    foreach($chore in $chores)
    {
        if ($chore.nextDueDate)
        {
            $dueDate = Get-Date $chore.nextDueDate
            if (($dueDate - $today).Days -lt 0) #OVERDUE
            {
                write-host "$($chore.name) $dueDate is overdue!"
                $overdueTasks += $chore
            }
            elseif (($dueDate - $today) -lt 1) #due today
            {
                write-host "$($chore.name) $dueDate is due today!"
                $todaysTasks += $chore
                # Send-Notification -title "TASK DUE TODAY" -content "$($chore.Name) is due today!"
            }
            else
            {
                write-host "$($chore.name) $dueDate is due in the future"
            }
        }
    
    }
    
    if ($overdueTasks.Count -ne 0)
    {
        Write-Host "Sending a notification for $($overdueTasks.Count) overdue tasks"
        $content = "The following tasks are overdue!`n"
        foreach($overdueTask in $overdueTasks)
        {
            $content += "$($overdueTask.Name) was due $(Get-Date $overdueTask.nextDueDate -Format "MM/dd/yyyy HH:mm")`n"
        }
        Send-Notification -title "OVERDUE TASKS" -content $content
    }
    
    if ($todaysTasks.Count -ne 0)
    {
        Write-Host "Sending a notification for $($todaysTasks.Count) tasks due today"
        $content = "The following tasks are due today!`n"
        foreach($task in $todaysTasks)
        {
            $content += "$($task.Name) is due $(Get-Date $task.nextDueDate -Format "MM/dd/yyyy HH:mm")`n"
        }
        Send-Notification -title "TODAY'S TASKS" -content $content
    }

    Write-Host "Finding next notification time..."
    $nextNotificationTomorrow = $true
    foreach($time in $notificationTimes)
    {
        $now = Get-Date
        $diff = $now.Hour - $time
        if ($diff -lt 0) # next notification time
        {
            $nextNotificationTomorrow = $false
            Write-Host "Next notification time is $time`:00"
            $sleepTime = ($diff * -1) * 60 * 60 # hours * mins * seconds
            Write-Host "Sleeping for $sleepTime seconds"
            Start-Sleep -Seconds $sleepTime
            continue # leave loop
        }
    }
    if ($nextNotificationTomorrow)
    {
        Write-Host "Next notification time is $time`:00"
        $diff = 24 - $now.Hour + $notificationTimes[0]
        $sleepTime = $diff * 60 * 60 # hours * mins * seconds
        Write-Host "Sleeping for $sleepTime seconds"
        Start-Sleep -Seconds $sleepTime
    }
}