97 lines
1.8 KiB
Go
97 lines
1.8 KiB
Go
// Package dial provides a model for representing a dial
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package dial
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import (
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"fmt"
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"github.com/StevanFreeborn/advent-of-code-2025/cmd/01/direction"
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"github.com/StevanFreeborn/advent-of-code-2025/cmd/01/instruction"
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)
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type Dial interface {
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ZeroCount() int
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Value() int
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Turn(instruction instruction.Instruction)
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}
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type dial struct {
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zeroCount int
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value int
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}
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func New() Dial {
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return &dial{
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zeroCount: 0,
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value: 50,
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}
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}
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func From(value int) Dial {
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return &dial{
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zeroCount: 0,
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value: value,
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}
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}
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func (d *dial) ZeroCount() int {
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return d.zeroCount
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}
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func (d *dial) Value() int {
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return d.value
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}
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func (d *dial) Turn(instruction instruction.Instruction) {
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logPrefix := fmt.Sprintf("[TURN %s %d]", instruction.Direction(), instruction.Distance())
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if d.value < 0 || d.value > 99 {
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panic("NEVER SHALL YOU PASS!!!")
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}
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// d.value is always 0 to 99
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if instruction.Direction() == direction.Left {
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if d.value == 0 {
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d.zeroCount--
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}
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d.value -= instruction.Distance()
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// that here we are at 0
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if d.value == 0 {
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fmt.Printf("%s zeroCount++\n", logPrefix)
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d.zeroCount++
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}
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for d.value < 0 {
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// WE NEVER GET HERE
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// UNLESS d.value is -1 or less
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currentValue := d.value
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d.zeroCount++
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d.value += 100
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fmt.Printf("%s zeroCount++ => Correcting %d to %d (%d)\n", logPrefix, currentValue, d.value, d.zeroCount)
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}
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return
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}
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if instruction.Direction() == direction.Right {
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d.value += instruction.Distance()
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// that here we at 100 or the equilavent
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// of 0. this is counted
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for d.value > 99 {
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// WE NEVER GET HERE
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// UNLESS d.value is 100 or more
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currentValue := d.value
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d.zeroCount++
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d.value -= 100
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fmt.Printf("%s zeroCount++ => Correcting %d to %d (%d)\n", logPrefix, currentValue, d.value, d.zeroCount)
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}
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return
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}
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}
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