import {Pos, ratioWithinBase} from "../geo/Pos"
import {BallState, Player, PlayerInfo, PlayerTeam,} from "../model/tactic/Player"
import {Ball, BALL_ID, BALL_TYPE, CourtObject,} from "../model/tactic/CourtObjects"
import {ComponentId, TacticComponent, TacticContent,} from "../model/tactic/Tactic"
import {overlaps} from "../geo/Box"
import {RackedCourtObject, RackedPlayer} from "./RackedItems"
import {changePlayerBallState} from "./PlayerDomains"

export function placePlayerAt(
    refBounds: DOMRect,
    courtBounds: DOMRect,
    element: RackedPlayer,
): Player {
    const {x, y} = ratioWithinBase(refBounds, courtBounds)

    return {
        type: "player",
        id: "player-" + element.key + "-" + element.team,
        team: element.team,
        role: element.key,
        rightRatio: x,
        bottomRatio: y,
        ballState: BallState.NONE,
        path: null,
        actions: [],
    }
}

export function placeObjectAt(
    refBounds: DOMRect,
    courtBounds: DOMRect,
    rackedObject: RackedCourtObject,
    content: TacticContent,
): TacticContent {
    const {x, y} = ratioWithinBase(refBounds, courtBounds)

    let courtObject: CourtObject

    switch (rackedObject.key) {
        case BALL_TYPE:
            const playerCollidedIdx = getComponentCollided(
                refBounds,
                content.components,
                BALL_ID,
            )
            if (playerCollidedIdx != -1) {
                return dropBallOnComponent(playerCollidedIdx, content, true)
            }

            courtObject = {
                type: BALL_TYPE,
                id: BALL_ID,
                rightRatio: x,
                bottomRatio: y,
                actions: [],
            }
            break

        default:
            throw new Error("unknown court object " + rackedObject.key)
    }

    return {
        ...content,
        components: [...content.components, courtObject],
    }
}

export function dropBallOnComponent(
    targetedComponentIdx: number,
    content: TacticContent,
    setAsOrigin: boolean
): TacticContent {
    const component = content.components[targetedComponentIdx]

    if ((component.type == 'player' || component.type == 'phantom')) {
        const newState = setAsOrigin
            ? (component.ballState === BallState.PASSED || component.ballState === BallState.PASSED_ORIGIN) ? BallState.PASSED_ORIGIN : BallState.HOLDS_ORIGIN
            : BallState.HOLDS_BY_PASS

        content = changePlayerBallState(component, newState, content)
    }

    return removeBall(content)
}

export function removeBall(content: TacticContent): TacticContent {
    const ballObjIdx = content.components.findIndex((o) => o.type == "ball")

    if (ballObjIdx == -1) {
        return content
    }

    return {
        ...content,
        components: content.components.toSpliced(ballObjIdx, 1),
    }
}

export function placeBallAt(
    refBounds: DOMRect,
    courtBounds: DOMRect,
    content: TacticContent,
): TacticContent {
    if (!overlaps(courtBounds, refBounds)) {
        return removeBall(content)
    }
    const playerCollidedIdx = getComponentCollided(
        refBounds,
        content.components,
        BALL_ID,
    )

    if (playerCollidedIdx != -1) {
        return dropBallOnComponent(playerCollidedIdx, content, true)
    }

    const ballIdx = content.components.findIndex((o) => o.type == "ball")

    const {x, y} = ratioWithinBase(refBounds, courtBounds)

    const ball: Ball = {
        type: BALL_TYPE,
        id: BALL_ID,
        rightRatio: x,
        bottomRatio: y,
        actions: [],
    }

    let components = content.components

    if (ballIdx != -1) {
        components = components.toSpliced(ballIdx, 1, ball)
    } else {
        components = components.concat(ball)
    }

    return {
        ...content,
        components,
    }
}

export function moveComponent(
    newPos: Pos,
    component: TacticComponent,
    info: PlayerInfo,
    courtBounds: DOMRect,
    content: TacticContent,
    removed: (content: TacticContent) => TacticContent,
): TacticContent {
    const playerBounds = document
        .getElementById(info.id)!
        .getBoundingClientRect()

    // if the piece is no longer on the court, remove it
    if (!overlaps(playerBounds, courtBounds)) {
        return removed(content)
    }
    return updateComponent(
        {
            ...component,
            rightRatio: newPos.x,
            bottomRatio: newPos.y,
        },
        content,
    )
}

export function removeComponent(
    componentId: ComponentId,
    content: TacticContent,
): TacticContent {
    const componentIdx = content.components.findIndex(
        (c) => c.id == componentId,
    )

    return {
        ...content,
        components: content.components.toSpliced(componentIdx, 1),
    }
}

export function updateComponent(
    component: TacticComponent,
    content: TacticContent,
): TacticContent {
    const componentIdx = content.components.findIndex(
        (c) => c.id == component.id,
    )
    return {
        ...content,
        components: content.components.toSpliced(componentIdx, 1, component),
    }
}

export function getComponentCollided(
    bounds: DOMRect,
    components: TacticComponent[],
    ignore?: ComponentId,
): number | -1 {
    for (let i = 0; i < components.length; i++) {
        const component = components[i]

        if (component.id == ignore) continue

        const playerBounds = document
            .getElementById(component.id)!
            .getBoundingClientRect()

        if (overlaps(playerBounds, bounds)) {
            return i
        }
    }
    return -1
}

export function getRackPlayers(
    team: PlayerTeam,
    components: TacticComponent[],
): RackedPlayer[] {
    return ["1", "2", "3", "4", "5"]
        .filter(
            (role) =>
                components.findIndex(
                    (c) =>
                        c.type == "player" && c.team == team && c.role == role,
                ) == -1,
        )
        .map((key) => ({team, key}))
}