# ---------------------------- Advent of code 2020 Day 12 --------------------------- #

# Get input
Clear-Host
[System.Collections.Generic.List[psobject]]$puzzleInput = Get-Content -Path "$env:USERPROFILE\Downloads\input.txt"

$instructions = $puzzleInput | ForEach-Object {

    [PSCustomObject]@{
        "Direction" = $_.Substring(0, 1)
        "Moves"     = $_.Substring(1)

    }

}

$currentDirection = 90

$currentPosition = @{"NorthSouth" = 0; "EastWest" = 0 }

foreach ($instruction in $instructions) {

    "Currently at $($currentPosition.Values)"
    "Current direction is $currentDirection"

    switch ($instruction.direction) {

        "N" {

            "Now moving North by $($instruction.moves)"

            $currentPosition.NorthSouth = $currentPosition.NorthSouth + $instruction.moves
        }

        "S" {

            "Now moving South by $($instruction.moves)"

            $currentPosition.NorthSouth = $currentPosition.NorthSouth - $instruction.moves

        }

        "E" {

            "Now moving East by $($instruction.moves)"

            $currentPosition.EastWest = $currentPosition.EastWest + $instruction.moves

        }

        "W" {

            "Now moving West by $($instruction.moves)"

            $currentPosition.EastWest = $currentPosition.EastWest - $instruction.moves

        }

        "L" {

            "Now turning Left by $($instruction.moves)"

            $currentDirection = ($currentDirection - $instruction.moves) % 360

            if ($currentDirection -lt 0) {

                $currentDirection = $currentDirection + 360

            }

        }

        "R" {

            "Now turning Right by $($instruction.moves)"

            $currentDirection = ($currentDirection + $instruction.moves) % 360

            if ($currentDirection -lt 0) {

                $currentDirection = $currentDirection + 360

            }

        }

        "F" {

            "Now moving Forward by $($instruction.moves)"

            switch ($currentDirection) {

                0 { $currentPosition.NorthSouth = $currentPosition.NorthSouth + $instruction.moves }
                90 { $currentPosition.EastWest = $currentPosition.EastWest + $instruction.moves }
                180 { $currentPosition.NorthSouth = $currentPosition.NorthSouth - $instruction.moves }
                270 { $currentPosition.EastWest = $currentPosition.EastWest - $instruction.moves }

            }
        }

    }

    "..."
}

"Final position is"
$currentPosition

"Puzzle solution is"

[Math]::Abs($currentPosition.NorthSouth) + [Math]::Abs($currentPosition.EastWest)