puzzle

type PerformanceMetrics struct {
	InputReadingTime    time.Duration
	InputProcessingTime time.Duration
	Part1Time           time.Duration
	Part2Time           time.Duration
}

type Solution struct {
	// Part1Output is the output of part 1 as a string
	Part1Output string
	// Part2Output is the output of part 2 as a string
	Part2Output string
}

type Solver interface {

	// ProcessInput should process the input read from the file.
	// The argument is the whole contents of the file as a string.
	// It is up to the implementation how the result of the processing should be saved.
	// For Advent of Code, an instance variable that can be shared between part 1 and part 2 is often
	// a good way of saving the input processing.
	ProcessInput(fileContent string) error

	// Part1 should return the solution for part 1 of the puzzle
	Part1() (string, error)

	// Part1 should return the solution for part 2 of the puzzle
	Part2() (string, error)
}

type SolverRunner struct {
	// Input contains a reader to the puzzle input
	Input io.Reader
	// Solver is the solver that can solve the puzzle
	Solver Solver
	// PerformanceMetrics contains stats about input reading/processing and the
	// execution of the solver
	PerformanceMetrics
	// Solution contains the output for both parts of the puzzle
	Solution
}