export enum DieFace {
    FAIL = 'F',
    STOP = 'S',
    WILD = '*',
    BONUS = 'B',
    USELESS = 'X',
    SCORE_0 = '0',
    SCORE_1 = '1',
    SCORE_2 = '2',
    SCORE_3 = '3',
    SCORE_4 = '4',
    SCORE_5 = '5',
    SCORE_6 = '6',
    SCORE_7 = '7',
    SCORE_8 = '8',
    SCORE_9 = '9',
    SCORE_10 = '10',
}

export type SpecialDie = DieFace.FAIL | DieFace.STOP | DieFace.WILD | DieFace.BONUS | DieFace.USELESS
export type ScoringDie =
    | DieFace.SCORE_0
    | DieFace.SCORE_1
    | DieFace.SCORE_2
    | DieFace.SCORE_3
    | DieFace.SCORE_4
    | DieFace.SCORE_5
    | DieFace.SCORE_6
    | DieFace.SCORE_7
    | DieFace.SCORE_8
    | DieFace.SCORE_9
    | DieFace.SCORE_10

type DieFaceCount = {
    [v in DieFace]?: number
}

export enum DieState {
    ROLLED = 'rolled',
    SELECTED = 'selected',
    HELD = 'held',
    HELD_SELECTED = 'held_selected',
    SCORED = 'scored',
}

export function isHeldState(d: DieState): d is DieState.HELD | DieState.HELD_SELECTED {
    return d === DieState.HELD || d === DieState.HELD_SELECTED
}

export function isSelectedState(d: DieState): d is DieState.SELECTED | DieState.HELD_SELECTED {
    return d === DieState.SELECTED || d === DieState.HELD_SELECTED
}

export function setSelected(d: DieState): DieState.SELECTED | DieState.HELD_SELECTED | DieState.SCORED {
    switch (d) {
        case DieState.ROLLED:
            return DieState.SELECTED
        case DieState.HELD:
            return DieState.HELD_SELECTED
        case DieState.SELECTED:
        case DieState.HELD_SELECTED:
        case DieState.SCORED:
            return d
    }
}

export function setDeselected(d: DieState): DieState.ROLLED | DieState.HELD | DieState.SCORED {
    switch (d) {
        case DieState.SELECTED:
            return DieState.ROLLED
        case DieState.HELD_SELECTED:
            return DieState.HELD
        case DieState.ROLLED:
        case DieState.HELD:
        case DieState.SCORED:
            return d
    }
}

export function toggleSelected(d: DieState): DieState {
    switch (d) {
        case DieState.ROLLED:
            return DieState.SELECTED
        case DieState.SELECTED:
            return DieState.ROLLED
        case DieState.HELD:
            return DieState.HELD_SELECTED
        case DieState.HELD_SELECTED:
            return DieState.HELD
        case DieState.SCORED:
            return DieState.SCORED
    }
}

export interface DieResult {
    readonly type: DieType
    readonly face: DieFace
    readonly state: DieState
}

export interface DieType {
    // The name of this die type
    readonly name: string
    // The faces of this die type; faces may be repeated to increase their odds
    readonly faces: readonly DieFace[]
}

export interface DiceCombo {
    // The name of this combo, for the UI
    readonly name: string
    // How many points this combo is worth
    readonly points: number
    // Which dice are needed to satisfy this combo
    readonly dice: readonly ScoringDie[]
    // How many dice can be replaced for the combo
    readonly wildMaxDice?: number
}

export interface DiceComboResult {
    // combo used
    readonly combo: DiceCombo
    // total number of points
    readonly points: number
    // number of dice used
    readonly usesDice: DieFaceCount
    // number of wild dice used
    readonly wildDice: number
    // number of bonus dice used
    readonly bonusDice: number
}