package sudoku

import (
	"errors"
	"fmt"

	"git.kleiax.de/homepage/libs/sudoku/board"
	"git.kleiax.de/homepage/libs/sudoku/logic"
)

type Game struct {
	field  *board.Field
	solver logic.Solver
}

func New(parser Parser, solver Solver, data []byte) (*Game, error) {
	err := parser.parse(data)
	if err != nil {
		return &Game{}, fmt.Errorf("can not create game: %w", err)
	}
	return &Game{solver: solver, field: parser.getField(0)}, nil
}

func (g *Game) Solve() error {
	g.solver.initStragies(g.field)
	for !g.isFinished() {
		if !g.nextSolveStep() {
			return errors.New("no strategy can solve the puzzle")
		}
	}
	return nil
}

func (g *Game) nextSolveStep() bool {
	return g.solver.run(0)
}

func (g *Game) prevSolveStep() {
	// far far in the future
}

func (g *Game) isFinished() bool {
	return g.field.isSolved()
}

func (g *Game) GetField() Field {
	return *g.field
}