'use strict'

const Joi = require('joi')
const apiSchema = require('../../schemas/api')
const errorSchema = require('../../schemas/errors')
const groupingSchema = require('../../schemas/groupings')
const params = require('../../schemas/params')

const pluginConfig = {
    handlerType: 'grouping',
    docs: {
        description: 'active memberships',
        notes: 'A list of groupings with active membership',
    },
}

const validators = {
    /** Validate the header (cookie check) */
    // headers: true,

    /** Validate the route params (/active/{thing}) */
    params: params.profileId,

    /** Validate the route query (/active/{thing}?limit=10&offset=10) */
    query: Joi.object({ type: Joi.string().lowercase().min(6).max(11) }),

    /** Validate the incoming payload (POST method) */
    // payload: true,
}

const responseSchemas = {
    single: groupingSchema.single,
    list: groupingSchema.listWithProfiles,
    error: errorSchema.single,
}

const _activeGroupingIds = allMemberships => {
    const active = {}
    allMemberships.forEach(membership => {
        if (!membership.is_active) return
        if (!active[membership.grouping_id]) {
            active[membership.grouping_id] = []
        }
        active[membership.grouping_id].push(membership)
    })
    const ids = []
    Object.values(active).forEach(profileListInGrouping => {
        if (profileListInGrouping.length == 2) {
            ids.push(profileListInGrouping[0].grouping_id)
        }
    })
    return ids
}

module.exports = {
    method: 'GET',
    path: '/{profile_id}',
    options: {
        ...pluginConfig.docs,
        tags: ['api'],
        /** Protect this route with authentication? */
        auth: false,
        cors: true,
        handler: async function (request, h) {
            const { membershipService, profileService, userService } =
                request.server.services()
            const membershipType = request.query.type

            const profileId = request.params.profile_id
            let groupings = await membershipService.findGroupingsByProfileId(
                profileId,
                membershipType,
            )
            let memberships = await membershipService.findMemberships(
                groupings.map(grouping => grouping.grouping_id),
            )

            /**
             * Heavily process the result by storing just a profile_id
             * and attach complete profiles
             */
            let pIds = groupings.reduce((ids, grouping) => {
                grouping.profiles.forEach(p => {
                    if (p.profile_id == profileId) return
                    ids.push(p.profile_id)
                    grouping.profile = p.profile_id
                })
                delete grouping.profiles
                return ids
            }, [])
            /** Assemble complete profiles to reference and pass */
            const completedProfiles = await profileService.getProfilesFor(
                pIds,
                'participant',
            )

            /** Grabs revealTags */
            const profileIdsFromCompletedProfiles = completedProfiles.map(
                p => p.profile_id,
            )
            const groupingIdsFromGroupings = groupings.map(g => g.grouping_id)
            const revealTags = await profileService.getTagsFor(
                profileIdsFromCompletedProfiles,
                groupingIdsFromGroupings,
                'reveal',
            )

            /** If the revealTags exist, the completedProfile's hidden info is
             * removed and replaced with the completedProfile's user information
             * Otherwise the completedProfiles remain unchanged
             */
            const userIdsFromCompletedProfiles = completedProfiles.map(
                p => p.user_id,
            )
            const user = await userService.findById(
                userIdsFromCompletedProfiles,
            )
            if (revealTags && user) {
                for (const t of revealTags) {
                    if (t.tag.tag_description) {
                        completedProfiles[0][t.tag.tag_description] =
                            user[t.tag.tag_description]
                    }
                }
            }

            const reformattedGroupings = groupings.map(g => {
                completedProfiles.forEach(p => {
                    g.profile = g.profile == p.profile_id ? p : g.profile
                })
                g.is_paired = _activeGroupingIds(memberships).includes(
                    g.grouping_id,
                )
                return g
            })

            try {
                return {
                    ok: true,
                    handler: pluginConfig.handlerType,
                    data: reformattedGroupings,
                }
            } catch (err) {
                return {
                    ok: false,
                    handler: pluginConfig.handlerType,
                    data: { error: `${err}` },
                }
            }
        },

        /** Validate based on validators object */
        validate: {
            ...validators,
            failAction: 'log',
        },

        /** Validate the server response */
        response: {
            schema: apiSchema.single
                .append({
                    data: responseSchemas.list,
                })
                .label('grouping_list_res'),
        },
    },
}