import { publishActionReply, parseSimTime } from '../../actionsHelper.js'
import { Frustum } from '../../frustum.js'

export const methods = {

    /*  Event-Rx:
        {
            "action": "GETAGENTPOSITION",
            "reqid": "6az5e4r6a",
            "payload": {
                "agentId": "agent42",
                "t": 12.5
            }
        }
        Event-Tx:
        {
            "action": "GETAGENTPOSITION",
            "success": true,
            "reqid": "6az5e4r6a",
            "payload": {
                "agent": {
                    "id": "agent42",
                    "position": { "x": 1, "y": 2, "z": 3 },
                    "vector": { "x": 0, "y": 0, "z": 0 },
                    "since": 0,
                    "generation": 2,
                    "t": 12.5
                }
            }
        }
    */
    async action_GETAGENTPOSITION(action, payload, reqid, sender, roles) {
        const replyOpts = {
            action,
            reqid,
            sender,
            replyChannel: this.config.observer.observerActionsReply,
        }
        if(!this.accessRights.canDo(roles, action)) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Unauthorized action !',
            } })
            return
        }

        const reader = this.observerSrv.gpsStorageReader
        if(!reader) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'GPS storage reader not ready',
            } })
            return
        }

        if(!this.observerSrv.isLive()) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Simulation not live',
            } })
            return
        }

        const agentId = payload?.agentId
        if(!agentId || typeof(agentId) !== 'string') {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Missing or invalid agentId',
            } })
            return
        }

        const at = parseSimTime(payload, () => this.observerSrv.now())
        if(at === null) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Invalid simulation time',
            } })
            return
        }

        const agent = await reader.getAgentPosition(agentId, at)
        if(!agent) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: `Unknown agent: ${agentId}`,
            } })
            return
        }

        publishActionReply(this, { ...replyOpts, reply: {
            success: true,
            payload: { agent },
        } })
    },

    /*  Event-Rx:
        {
            "action": "GETAGENTSINFRUSTUM",
            "reqid": "6az5e4r6a",
            "payload": {
                "planes": [
                    { "nx": 1, "ny": 0, "nz": 0, "d": -10 },
                    { "nx": -1, "ny": 0, "nz": 0, "d": 10 },
                    { "nx": 0, "ny": 1, "nz": 0, "d": -10 },
                    { "nx": 0, "ny": -1, "nz": 0, "d": 10 },
                    { "nx": 0, "ny": 0, "nz": 1, "d": 0 },
                    { "nx": 0, "ny": 0, "nz": -1, "d": 5 }
                ],
                "t": 0
            }
        }
    */
    async action_GETAGENTSINFRUSTUM(action, payload, reqid, sender, roles) {
        const replyOpts = {
            action,
            reqid,
            sender,
            replyChannel: this.config.observer.observerActionsReply,
        }
        if(!this.accessRights.canDo(roles, action)) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Unauthorized action !',
            } })
            return
        }

        const registry = this.observerSrv.requestorRegistry
        if(!registry) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Requestor registry not ready',
            } })
            return
        }

        if(!this.observerSrv.isLive()) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Simulation not live',
            } })
            return
        }

        const frustum = Frustum.fromPlanes(payload?.planes)
        if(!frustum) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Missing or invalid frustum planes (expected 6)',
            } })
            return
        }

        const at = parseSimTime(payload, () => this.observerSrv.now())
        if(at === null) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Invalid simulation time',
            } })
            return
        }

        const result = await registry.evaluateOnce({ frustum, t: at })
        if(!result.ok) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: result.err,
            } })
            return
        }

        publishActionReply(this, { ...replyOpts, reply: {
            success: true,
            payload: {
                agents: result.agents,
                t: result.t,
            },
        } })
    },

    /*  Event-Rx:
        {
            "action": "SUBSCRIBEFRUSTUM",
            "reqid": "6az5e4r6a",
            "sender": "client-uuid",
            "payload": {
                "planes": [
                    { "nx": 1, "ny": 0, "nz": 0, "d": -10 },
                    { "nx": -1, "ny": 0, "nz": 0, "d": 10 },
                    { "nx": 0, "ny": 1, "nz": 0, "d": -10 },
                    { "nx": 0, "ny": -1, "nz": 0, "d": 10 },
                    { "nx": 0, "ny": 0, "nz": 1, "d": 0 },
                    { "nx": 0, "ny": 0, "nz": -1, "d": 5 }
                ],
                "frequency": 800
            }
        }
        Event-Tx:
        {
            "action": "SUBSCRIBEFRUSTUM",
            "success": true,
            "reqid": "6az5e4r6a",
            "payload": {
                "frequency": 900,
                "agents": [ ... ],
                "t": 12.5
            }
        }
        Periodic push (no reqid):
        {
            "action": "GETAGENTSINFRUSTUM",
            "success": true,
            "sender": "observer",
            "payload": { "agents": [ ... ], "t": 12.5 }
        }
    */
    async action_SUBSCRIBEFRUSTUM(action, payload, reqid, sender, roles) {
        const replyOpts = {
            action,
            reqid,
            sender,
            replyChannel: this.config.observer.observerActionsReply,
        }
        if(!this.accessRights.canDo(roles, action)) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Unauthorized action !',
            } })
            return
        }

        if(!sender || typeof(sender) !== 'string') {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Missing or invalid sender',
            } })
            return
        }

        const registry = this.observerSrv.requestorRegistry
        if(!registry) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Requestor registry not ready',
            } })
            return
        }

        if(!this.observerSrv.isLive()) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: 'Simulation not live',
            } })
            return
        }

        const result = await registry.subscribeFrustum(sender, {
            planes: payload?.planes,
            frequency: payload?.frequency,
        })
        if(!result.ok) {
            publishActionReply(this, { ...replyOpts, reply: {
                success: false,
                err: result.err,
            } })
            return
        }

        publishActionReply(this, { ...replyOpts, reply: {
            success: true,
            payload: {
                frequency: result.frequency,
                agents: result.agents,
                t: result.t,
            },
        } })
    },

}