import {BallState, Player, PlayerPhantom} from "../model/tactic/Player"
import {middlePos, ratioWithinBase} from "../geo/Pos"
import {ComponentId, TacticComponent, TacticContent,} from "../model/tactic/Tactic"
import {overlaps} from "../geo/Box"
import {Action, ActionKind} from "../model/tactic/Action"
import {removeBall, updateComponent} from "./TacticContentDomains"
import {getOrigin} from "./PlayerDomains"

export function refreshAllActions(
    actions: Action[],
    components: TacticComponent[],
) {
    return actions.map((action) => ({
        ...action,
        type: getActionKindFrom(action.fromId, action.toId, components),
    }))
}

export function getActionKindFrom(
    originId: ComponentId,
    targetId: ComponentId | null,
    components: TacticComponent[],
): ActionKind {
    const origin = components.find((p) => p.id == originId)!
    const target = components.find(p => p.id == targetId)

    let ballState = BallState.NONE

    if (origin.type == "player" || origin.type == "phantom") {
        ballState = origin.ballState
    }

    let hasTarget = target ? (target.type != 'phantom' || target.originPlayerId != origin.id) : false

    return getActionKind(hasTarget, ballState)
}

export function getActionKind(hasTarget: boolean, ballState: BallState): ActionKind {
    switch (ballState) {
        case BallState.HOLDS:
            return hasTarget ? ActionKind.SHOOT : ActionKind.DRIBBLE
        case BallState.SHOOTED:
            return ActionKind.MOVE
        case BallState.NONE:
            return hasTarget ? ActionKind.SCREEN : ActionKind.MOVE
    }
}

export function placeArrow(
    origin: Player | PlayerPhantom,
    courtBounds: DOMRect,
    arrowHead: DOMRect,
    content: TacticContent,
): { createdAction: Action, newContent: TacticContent } {
    const originRef = document.getElementById(origin.id)!
    const start = ratioWithinBase(
        middlePos(originRef.getBoundingClientRect()),
        courtBounds,
    )

    /**
     * Creates a new phantom component.
     * Be aware that this function will reassign the `content` parameter.
     * @param receivesBall
     */
    function createPhantom(receivesBall: boolean): ComponentId {
        const {x, y} = ratioWithinBase(arrowHead, courtBounds)

        let itemIndex: number
        let originPlayer: Player

        if (origin.type == "phantom") {
            // if we create a phantom from another phantom,
            // simply add it to the phantom's path
            const originPlr = getOrigin(origin, content.components)!
            itemIndex = originPlr.path!.items.length
            originPlayer = originPlr
        } else {
            // if we create a phantom directly from a player
            // create a new path and add it into
            itemIndex = 0
            originPlayer = origin
        }

        const path = originPlayer.path

        const phantomId = "phantom-" + itemIndex + "-" + originPlayer.id

        content = updateComponent(
            {
                ...originPlayer,
                path: {
                    items: path ? [...path.items, phantomId] : [phantomId],
                },
            },
            content,
        )

        const ballState = receivesBall
            ? BallState.HOLDS
            : origin.ballState == BallState.HOLDS
                ? BallState.HOLDS
                : BallState.NONE

        const phantom: PlayerPhantom = {
            type: "phantom",
            id: phantomId,
            rightRatio: x,
            bottomRatio: y,
            originPlayerId: originPlayer.id,
            ballState
        }
        content = {
            ...content,
            components: [...content.components, phantom],
        }
        return phantom.id
    }

    for (const component of content.components) {
        if (component.id == origin.id) {
            continue
        }

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

        if (overlaps(componentBounds, arrowHead)) {
            const targetPos = document
                .getElementById(component.id)!
                .getBoundingClientRect()

            const end = ratioWithinBase(middlePos(targetPos), courtBounds)

            let toId = component.id

            if (component.type == "ball") {
                toId = createPhantom(true)
                content = removeBall(content)
            }

            const action: Action = {
                fromId: originRef.id,
                toId,
                type: getActionKind(true, origin.ballState),
                moveFrom: start,
                segments: [{next: end}],
            }

            return {
                newContent: {
                    ...content,
                    actions: [...content.actions, action],
                },
                createdAction: action
            }
        }
    }

    const phantomId = createPhantom(origin.ballState == BallState.HOLDS)

    const action: Action = {
        fromId: originRef.id,
        toId: phantomId,
        type: getActionKind(false, origin.ballState),
        moveFrom: ratioWithinBase(
            middlePos(originRef.getBoundingClientRect()),
            courtBounds,
        ),
        segments: [
            {next: ratioWithinBase(middlePos(arrowHead), courtBounds)},
        ],
    }
    return {
        newContent: {
            ...content,
            actions: [...content.actions, action],
        },
        createdAction: action
    }
}

export function repositionActionsRelatedTo(
    compId: ComponentId,
    courtBounds: DOMRect,
    actions: Action[],
): Action[] {
    const posRect = document.getElementById(compId)?.getBoundingClientRect()
    const newPos = posRect != undefined
        ? ratioWithinBase(middlePos(posRect), courtBounds)
        : undefined

    return actions.flatMap((action) => {
        if (newPos == undefined) {
            return []
        }

        if (action.fromId == compId) {
            return [{...action, moveFrom: newPos}]
        }

        if (action.toId == compId) {
            const lastIdx = action.segments.length - 1
            const segments = action.segments.toSpliced(lastIdx, 1, {
                ...action.segments[lastIdx],
                next: newPos!,
            })
            return [{...action, segments}]
        }

        return action
    })
}