import {UIEventSource} from "../Logic/UIEventSource";
import {VariableUiElement} from "./Base/VariableUIElement";
import LiveQueryHandler from "../Logic/Web/LiveQueryHandler";
import {ImageCarousel} from "./Image/ImageCarousel";
import Combine from "./Base/Combine";
import {FixedUiElement} from "./Base/FixedUiElement";
import {ImageUploadFlow} from "./Image/ImageUploadFlow";

import ShareButton from "./BigComponents/ShareButton";
import Svg from "../Svg";
import ReviewElement from "./Reviews/ReviewElement";
import MangroveReviews from "../Logic/Web/MangroveReviews";
import Translations from "./i18n/Translations";
import ReviewForm from "./Reviews/ReviewForm";
import OpeningHoursVisualization from "./OpeningHours/OpeningHoursVisualization";

import State from "../State";
import {ImageSearcher} from "../Logic/Actors/ImageSearcher";
import BaseUIElement from "./BaseUIElement";
import LayerConfig from "../Customizations/JSON/LayerConfig";
import Title from "./Base/Title";
import Table from "./Base/Table";
import Histogram from "./BigComponents/Histogram";
import Loc from "../Models/Loc";
import {Utils} from "../Utils";
import BaseLayer from "../Models/BaseLayer";
import DeleteWizard from "./Popup/DeleteWizard";
import Constants from "../Models/Constants";

export interface SpecialVisualization {
    funcName: string,
    constr: ((state: State, tagSource: UIEventSource<any>, argument: string[]) => BaseUIElement),
    docs: string,
    example?: string,
    args: { name: string, defaultValue?: string, doc: string }[]
}

export default class SpecialVisualizations {


    public static specialVisualisationsByName: Map<string, SpecialVisualization> = SpecialVisualizations.byName();
    static HelpMessage: BaseUIElement = SpecialVisualizations.GenHelpMessage();
    static constructMiniMap: (options?: {
        background?: UIEventSource<BaseLayer>,
        location?: UIEventSource<Loc>,
        allowMoving?: boolean
    }) => BaseUIElement;
    static constructShowDataLayer: (features: UIEventSource<{ feature: any; freshness: Date }[]>, leafletMap: UIEventSource<any>, layoutToUse: UIEventSource<any>, enablePopups?: boolean, zoomToFeatures?: boolean) => any;
    public static specialVisualizations: SpecialVisualization[] =
        [
            {
                funcName: "all_tags",
                docs: "Prints all key-value pairs of the object - used for debugging",
                args: [],
                constr: ((state: State, tags: UIEventSource<any>) => {
                    return new VariableUiElement(tags.map(tags => {
                        const parts = [];
                        for (const key in tags) {
                            if (!tags.hasOwnProperty(key)) {
                                continue;
                            }
                            parts.push(key + "=" + tags[key]);
                        }
                        return parts.join("<br/>")
                    })).SetStyle("border: 1px solid black; border-radius: 1em;padding:1em;display:block;")
                })
            },

            {
                funcName: "image_carousel",
                docs: "Creates an image carousel for the given sources. An attempt will be made to guess what source is used. Supported: Wikidata identifiers, Wikipedia pages, Wikimedia categories, IMGUR (with attribution, direct links)",
                args: [{
                    name: "image key/prefix",
                    defaultValue: "image",
                    doc: "The keys given to the images, e.g. if <span class='literal-code'>image</span> is given, the first picture URL will be added as <span class='literal-code'>image</span>, the second as <span class='literal-code'>image:0</span>, the third as <span class='literal-code'>image:1</span>, etc... "
                },
                    {
                        name: "smart search",
                        defaultValue: "true",
                        doc: "Also include images given via 'Wikidata', 'wikimedia_commons' and 'mapillary"
                    }],
                constr: (state: State, tags, args) => {
                    const imagePrefix = args[0];
                    const loadSpecial = args[1].toLowerCase() === "true";
                    const searcher: UIEventSource<{ key: string, url: string }[]> = ImageSearcher.construct(tags, imagePrefix, loadSpecial);

                    return new ImageCarousel(searcher, tags);
                }
            },

            {
                funcName: "image_upload",
                docs: "Creates a button where a user can upload an image to IMGUR",
                args: [{
                    name: "image-key",
                    doc: "Image tag to add the URL to (or image-tag:0, image-tag:1 when multiple images are added)",
                    defaultValue: "image"
                }],
                constr: (state: State, tags, args) => {
                    return new ImageUploadFlow(tags, args[0])
                }
            },
            {
                funcName: "minimap",
                docs: "A small map showing the selected feature. Note that no styling is applied, wrap this in a div",
                args: [
                    {
                        doc: "The (maximum) zoomlevel: the target zoomlevel after fitting the entire feature. The minimap will fit the entire feature, then zoom out to this zoom level. The higher, the more zoomed in with 1 being the entire world and 19 being really close",
                        name: "zoomlevel",
                        defaultValue: "18"
                    },
                    {
                        doc: "(Matches all resting arguments) This argument should be the key of a property of the feature. The corresponding value is interpreted as either the id or the a list of ID's. The features with these ID's will be shown on this minimap.",
                        name: "idKey",
                        defaultValue: "id"
                    }
                ],
                example: "`{minimap()}`, `{minimap(17, id, _list_of_embedded_feature_ids_calculated_by_calculated_tag):height:10rem; border: 2px solid black}`",
                constr: (state, tagSource, args) => {

                    const keys = [...args]
                    keys.splice(0, 1)
                    const featureStore = state.allElements.ContainingFeatures
                    const featuresToShow: UIEventSource<{ freshness: Date, feature: any }[]> = tagSource.map(properties => {
                        const values: string[] = Utils.NoNull(keys.map(key => properties[key]))
                        const features: { freshness: Date, feature: any }[] = []
                        for (const value of values) {
                            let idList = [value]
                            if (value.startsWith("[")) {
                                // This is a list of values
                                idList = JSON.parse(value)
                            }
                            for (const id of idList) {
                                features.push({
                                    freshness: new Date(),
                                    feature: featureStore.get(id)
                                })
                            }
                        }
                        return features
                    })
                    const properties = tagSource.data;
                    let zoom = 18
                    if (args[0]) {
                        const parsed = Number(args[0])
                        if (!isNaN(parsed) && parsed > 0 && parsed < 25) {
                            zoom = parsed;
                        }
                    }
                    const locationSource = new UIEventSource<Loc>({
                        lat: Number(properties._lat),
                        lon: Number(properties._lon),
                        zoom: zoom
                    })
                    const minimap = SpecialVisualizations.constructMiniMap(
                        {
                            background: state.backgroundLayer,
                            location: locationSource,
                            allowMoving: false
                        }
                    )

                    locationSource.addCallback(loc => {
                        if (loc.zoom > zoom) {
                            // We zoom back
                            locationSource.data.zoom = zoom;
                            locationSource.ping();
                        }
                    })

                    SpecialVisualizations.constructShowDataLayer(
                        featuresToShow,
                        minimap["leafletMap"],
                        State.state.layoutToUse,
                        false,
                        true
                    )


                    minimap.SetStyle("overflow: hidden; pointer-events: none;")
                    return minimap;
                }
            },
            {
                funcName: "reviews",
                docs: "Adds an overview of the mangrove-reviews of this object. Mangrove.Reviews needs - in order to identify the reviewed object - a coordinate and a name. By default, the name of the object is given, but this can be overwritten",
                example: "<b>{reviews()}<b> for a vanilla review, <b>{reviews(name, play_forest)}</b> to review a play forest. If a name is known, the name will be used as identifier, otherwise 'play_forest' is used",
                args: [{
                    name: "subjectKey",
                    defaultValue: "name",
                    doc: "The key to use to determine the subject. If specified, the subject will be <b>tags[subjectKey]</b>"
                }, {
                    name: "fallback",
                    doc: "The identifier to use, if <i>tags[subjectKey]</i> as specified above is not available. This is effectively a fallback value"
                }],
                constr: (state: State, tags, args) => {
                    const tgs = tags.data;
                    const key = args[0] ?? "name"
                    let subject = tgs[key] ?? args[1];
                    if (subject === undefined || subject === "") {
                        return Translations.t.reviews.name_required;
                    }
                    const mangrove = MangroveReviews.Get(Number(tgs._lon), Number(tgs._lat),
                        encodeURIComponent(subject),
                        state.mangroveIdentity,
                        state.osmConnection._dryRun
                    );
                    const form = new ReviewForm((r, whenDone) => mangrove.AddReview(r, whenDone), state.osmConnection);
                    return new ReviewElement(mangrove.GetSubjectUri(), mangrove.GetReviews(), form);
                }
            },
            {
                funcName: "opening_hours_table",
                docs: "Creates an opening-hours table. Usage: {opening_hours_table(opening_hours)} to create a table of the tag 'opening_hours'.",
                args: [{
                    name: "key",
                    defaultValue: "opening_hours",
                    doc: "The tagkey from which the table is constructed."
                }],
                constr: (state: State, tagSource: UIEventSource<any>, args) => {
                    return new OpeningHoursVisualization(tagSource, args[0])
                }
            },

            {
                funcName: "live",
                docs: "Downloads a JSON from the given URL, e.g. '{live(example.org/data.json, shorthand:x.y.z, other:a.b.c, shorthand)}' will download the given file, will create an object {shorthand: json[x][y][z], other: json[a][b][c] out of it and will return 'other' or 'json[a][b][c]. This is made to use in combination with tags, e.g. {live({url}, {url:format}, needed_value)}",
                example: "{live({url},{url:format},hour)} {live(https://data.mobility.brussels/bike/api/counts/?request=live&featureID=CB2105,hour:data.hour_cnt;day:data.day_cnt;year:data.year_cnt,hour)}",
                args: [{
                    name: "Url", doc: "The URL to load"
                }, {
                    name: "Shorthands",
                    doc: "A list of shorthands, of the format 'shorthandname:path.path.path'. Seperated by ;"
                }, {
                    name: "path", doc: "The path (or shorthand) that should be returned"
                }],
                constr: (state: State, tagSource: UIEventSource<any>, args) => {
                    const url = args[0];
                    const shorthands = args[1];
                    const neededValue = args[2];
                    const source = LiveQueryHandler.FetchLiveData(url, shorthands.split(";"));
                    return new VariableUiElement(source.map(data => data[neededValue] ?? "Loading..."));
                }
            },

            {
                funcName: "histogram",
                docs: "Create a histogram for a list of given values, read from the properties.",
                example: "`{histogram('some_key')}` with properties being `{some_key: ['a','b','a','c']} to create a histogram",
                args: [
                    {
                        name: "key",
                        doc: "The key to be read and to generate a histogram from"
                    },
                    {
                        name: "title",
                        doc: "The text to put above the given values column",
                        defaultValue: ""
                    },
                    {
                        name: "countHeader",
                        doc: "The text to put above the counts",
                        defaultValue: ""
                    },
                    {
                        name: "colors*",
                        doc: "(Matches all resting arguments - optional) Matches a regex onto a color value, e.g. `3[a-zA-Z+-]*:#33cc33`"

                    }
                ],
                constr: (state: State, tagSource: UIEventSource<any>, args: string[]) => {

                    let assignColors = undefined;
                    if (args.length >= 3) {
                        const colors = [...args]
                        colors.splice(0, 3)
                        const mapping = colors.map(c => {
                            const splitted = c.split(":");
                            const value = splitted.pop()
                            const regex = splitted.join(":")
                            return {regex: "^" + regex + "$", color: value}
                        })
                        assignColors = (key) => {
                            for (const kv of mapping) {
                                if (key.match(kv.regex) !== null) {
                                    return kv.color
                                }
                            }
                            return undefined
                        }
                    }

                    const listSource: UIEventSource<string[]> = tagSource
                        .map(tags => {
                            try {
                                const value = tags[args[0]]
                                if (value === "" || value === undefined) {
                                    return undefined
                                }
                                return JSON.parse(value)
                            } catch (e) {
                                console.error("Could not load histogram: parsing  of the list failed: ", e)
                                return undefined;
                            }
                        })
                    return new Histogram(listSource, args[1], args[2], assignColors)
                }
            },
            {
                funcName: "share_link",
                docs: "Creates a link that (attempts to) open the native 'share'-screen",
                example: "{share_link()} to share the current page, {share_link(<some_url>)} to share the given url",
                args: [
                    {
                        name: "url",
                        doc: "The url to share (default: current URL)",
                    }
                ],
                constr: (state: State, tagSource: UIEventSource<any>, args) => {
                    if (window.navigator.share) {

                        const generateShareData = () => {


                            const title = state?.layoutToUse?.data?.title?.txt ?? "MapComplete";

                            let matchingLayer: LayerConfig = undefined;
                            for (const layer of (state?.layoutToUse?.data?.layers ?? [])) {
                                if (layer.source.osmTags.matchesProperties(tagSource?.data)) {
                                    matchingLayer = layer
                                }
                            }
                            let name = matchingLayer?.title?.GetRenderValue(tagSource.data)?.txt ?? tagSource.data?.name ?? "POI";
                            if (name) {
                                name = `${name} (${title})`
                            } else {
                                name = title;
                            }
                            let url = args[0] ?? ""
                            if (url === "") {
                                url = window.location.href
                            }
                            return {
                                title: name,
                                url: url,
                                text: state?.layoutToUse?.data?.shortDescription?.txt ?? "MapComplete"
                            }
                        }

                        return new ShareButton(Svg.share_svg().SetClass("w-8 h-8"), generateShareData)
                    } else {
                        return new FixedUiElement("")
                    }

                }
            },
            {
                funcName: "canonical",
                docs: "Converts a short, canonical value into the long, translated text",
                example: "{canonical(length)} will give 42 metre (in french)",
                args: [{
                    name: "key",
                    doc: "The key of the tag to give the canonical text for"
                }],
                constr: (state, tagSource, args) => {
                    const key = args [0]
                    return new VariableUiElement(
                        tagSource.map(tags => tags[key]).map(value => {
                                if (value === undefined) {
                                    return undefined
                                }
                                const unit = state.layoutToUse.data.units.filter(unit => unit.isApplicableToKey(key))[0]
                                if (unit === undefined) {
                                    return value;
                                }

                                return unit.asHumanLongValue(value);

                            },
                            [state.layoutToUse])
                    )
                }
            },
            {
                funcName: "delete",
                docs: `Offers a dialog to (soft) delete the point. The dialog is built to be user friendly and to prevent mistakes. If deletion is not possible, the dialog will hide itself.            

#### Hard deletion if enough experience

A feature can only be deleted by mapcomplete if:

- It is a node
- No ways or relations use the node
- The logged-in user has enough experience (at least ${Constants.userJourney.deletePointsOfOthersUnlock} changesets) OR the user is the only one to have edited the point previously
- The user did not select one of the 'non-delete-options' (see below)

In all other cases, a 'soft deletion' is used.

#### Soft deletion

A 'soft deletion' is when the point isn't deleted from OSM but retagged so that it'll won't how up in the mapcomplete theme anymore.
This makes it look like it was deleted, without doing damage. A fixme will be added to the point.

Note that a soft deletion is _only_ possible if these tags are provided by the theme creator, as they'll be different for every theme

#### No-delete options

In some cases, the contributor might want to delete something for the wrong reason (e.g. someone who wants to have a path removed "because the path is on their private property").
However, the path exists in reality and should thus be on OSM - otherwise the next contributor will pass by and notice "hey, there is a path missing here! Let me redraw it in OSM!)

The correct approach is to retag the feature in such a way that it is semantically correct *and* that it doesn't show up on the theme anymore.
A no-delete option is offered as 'reason to delete it', but secretly retags.

`,
                args: [],
                constr: (state, tagSource, args) => {
                    return new VariableUiElement(tagSource.map(tags => tags.id).map(id =>
                        new DeleteWizard(id)))
                }
            }

        ]

    private static byName(): Map<string, SpecialVisualization> {
        const result = new Map<string, SpecialVisualization>();

        for (const specialVisualization of SpecialVisualizations.specialVisualizations) {
            result.set(specialVisualization.funcName, specialVisualization)
        }

        return result;
    }

    private static GenHelpMessage() {

        const helpTexts =
            SpecialVisualizations.specialVisualizations.map(viz => new Combine(
                [
                    new Title(viz.funcName, 3),
                    viz.docs,
                    new Table(["name", "default", "description"],
                        viz.args.map(arg => [arg.name, arg.defaultValue ?? "undefined", arg.doc])
                    ),
                    new Title("Example usage", 4),
                    new FixedUiElement(
                        viz.example ?? "{" + viz.funcName + "(" + viz.args.map(arg => arg.defaultValue).join(",") + ")}"
                    ).SetClass("literal-code"),

                ]
            ));


        return new Combine([
                new Title("Special tag renderings", 3),
                "In a tagrendering, some special values are substituted by an advanced UI-element. This allows advanced features and visualizations to be reused by custom themes or even to query third-party API's.",
                "General usage is `{func_name()}`, `{func_name(arg, someotherarg)}` or `{func_name(args):cssStyle}`. Note that you _do not_fcs need to use quotes around your arguments, the comma is enough to seperate them. This also implies you cannot use a comma in your args",
                ...helpTexts
            ]
        );
    }
}