import Combine from "../Base/Combine";
import UserRelatedState from "../../Logic/State/UserRelatedState";
import {VariableUiElement} from "../Base/VariableUIElement";
import {Utils} from "../../Utils";
import {UIEventSource} from "../../Logic/UIEventSource";
import Title from "../Base/Title";
import Translations from "../i18n/Translations";
import Loading from "../Base/Loading";
import {FixedUiElement} from "../Base/FixedUiElement";
import Link from "../Base/Link";
import {DropDown} from "../Input/DropDown";
import BaseUIElement from "../BaseUIElement";
import ValidatedTextField from "../Input/ValidatedTextField";
import {SubtleButton} from "../Base/SubtleButton";
import Svg from "../../Svg";
import Toggle, {ClickableToggle} from "../Input/Toggle";
import Table from "../Base/Table";
import LeftIndex from "../Base/LeftIndex";
import Toggleable, {Accordeon} from "../Base/Toggleable";
import TableOfContents from "../Base/TableOfContents";
import {LoginToggle} from "../Popup/LoginButton";
import {QueryParameters} from "../../Logic/Web/QueryParameters";

interface NoteProperties {
    "id": number,
    "url": string,
    "date_created": string,
    closed_at?: string,
    "status": "open" | "closed",
    "comments": {
        date: string,
        uid: number,
        user: string,
        text: string,
        html: string
    }[]
}

interface NoteState {
    props: NoteProperties,
    theme: string,
    intro: string,
    dateStr: string,
    status: "imported" | "already_mapped" | "invalid" | "closed" | "not_found" | "open" | "has_comments"
}

class DownloadStatisticsButton extends SubtleButton {
    constructor(states: NoteState[][]) {
        super(Svg.statistics_svg(), "Download statistics");
        this.onClick(() => {
            
            const st: NoteState[] = [].concat(...states)
            
            const fields = [
                "id",
                "status",
                "theme",
                "date_created",
                "date_closed",
                "days_open",
                "intro",
                "...comments"
            ]
            const values : string[][] = st.map(note => {
                
                
                return [note.props.id+"",
                    note.status,
                    note.theme,
                    note.props.date_created?.substr(0, note.props.date_created.length - 3),
                    note.props.closed_at?.substr(0, note.props.closed_at.length - 3) ?? "",
                     JSON.stringify(  note.intro),
                    ...note.props.comments.map(c => JSON.stringify(c.user)+": "+JSON.stringify(c.text))
                ]
            })
            
            Utils.offerContentsAsDownloadableFile(
                [fields, ...values].map(c => c.join(", ")).join("\n"),
                "mapcomplete_import_notes_overview.csv",
                {
                    mimetype: "text/csv"
                }
            )
        })
    }
}

class MassAction extends Combine {
    constructor(state: UserRelatedState, props: NoteProperties[]) {
        const textField = ValidatedTextField.ForType("text").ConstructInputElement()

        const actions = new DropDown<{
            predicate: (p: NoteProperties) => boolean,
            action: (p: NoteProperties) => Promise<void>
        }>("On which notes should an action be performed?", [
            {
                value: undefined,
                shown: <string | BaseUIElement>"Pick an option..."
            },
            {
                value: {
                    predicate: p => p.status === "open",
                    action: async p => {
                        const txt = textField.GetValue().data
                        state.osmConnection.closeNote(p.id, txt)
                    }
                },
                shown: "Add comment to every open note and close all notes"
            },
            {
                value: {
                    predicate: p => p.status === "open",
                    action: async p => {
                        const txt = textField.GetValue().data
                        state.osmConnection.addCommentToNode(p.id, txt)
                    }
                },
                shown: "Add comment to every open note"
            },
            /*
            {
               // This was a one-off for one of the first imports 
                value:{
                    predicate: p => p.status === "open" && p.comments[0].text.split("\n").find(l => l.startsWith("note=")) !== undefined,
                    action: async p => {
                        const note = p.comments[0].text.split("\n").find(l => l.startsWith("note=")).substr("note=".length)
                        state.osmConnection.addCommentToNode(p.id, note)
                    }
                },
                shown:"On every open note, read the 'note='-tag and and this note as comment. (This action ignores the textfield)"
            },//*/

        ])

        const handledNotesCounter = new UIEventSource<number>(undefined)
        const apply = new SubtleButton(Svg.checkmark_svg(), "Apply action")
            .onClick(async () => {
                const {predicate, action} = actions.GetValue().data
                for (let i = 0; i < props.length; i++) {
                    handledNotesCounter.setData(i)
                    const prop = props[i]
                    if (!predicate(prop)) {
                        continue
                    }
                    await action(prop)
                }
                handledNotesCounter.setData(props.length)
            })
        super([

            actions,
            textField.SetClass("w-full border border-black"),
            new Toggle(
                new Toggle(
                    apply,

                    new Toggle(
                        new Loading(new VariableUiElement(handledNotesCounter.map(state => {
                            if (state === props.length) {
                                return "All done!"
                            }
                            return "Handling note " + (state + 1) + " out of " + props.length;
                        }))),
                        new Combine([Svg.checkmark_svg().SetClass("h-8"), "All done!"]).SetClass("thanks flex p-4"),
                        handledNotesCounter.map(s => s < props.length)
                    ),
                    handledNotesCounter.map(s => s === undefined)
                )

                , new VariableUiElement(textField.GetValue().map(txt => "Type a text of at least 15 characters to apply the action. Currently, there are " + (txt?.length ?? 0) + " characters")).SetClass("alert"),
                actions.GetValue().map(v => v !== undefined && textField.GetValue()?.data?.length > 15, [textField.GetValue()])
            ),
            new Toggle(
                new FixedUiElement("Testmode enable").SetClass("alert"), undefined,
                state.featureSwitchIsTesting
            )
        ]);
    }

}


class NoteTable extends Combine {

    constructor(noteStates: NoteState[], state?: UserRelatedState) {
        const typicalComment = noteStates[0].props.comments[0].html

        const table = new Table(
            ["id", "status", "last comment", "last modified by"],
            noteStates.map(ns => {
                const link = new Link(
                    "" + ns.props.id,
                    "https://openstreetmap.org/note/" + ns.props.id, true
                )
                let last_comment = "";
                const last_comment_props = ns.props.comments[ns.props.comments.length - 1]
                const before_last_comment = ns.props.comments[ns.props.comments.length - 2]
                if (ns.props.comments.length > 1) {
                    last_comment = last_comment_props.text
                    if (last_comment === undefined && before_last_comment?.uid === last_comment_props.uid) {
                        last_comment = before_last_comment.text
                    }
                }
                const statusIcon = BatchView.icons[ns.status]().SetClass("h-4 w-4 shrink-0")
                return [link, new Combine([statusIcon, ns.status]).SetClass("flex"), last_comment,
                    new Link(last_comment_props.user, "https://www.openstreetmap.org/user/" + last_comment_props.user, true)
                ]
            }),
            {sortable: true}
        ).SetClass("zebra-table link-underline");


        super([
            new Title("Mass apply an action on " + noteStates.length + " notes below"),
            state !== undefined ? new MassAction(state, noteStates.map(ns => ns.props)).SetClass("block") : undefined,
            table,
            new Title("Example note", 4),
            new FixedUiElement(typicalComment).SetClass("literal-code link-underline"),

        ])
        this.SetClass("flex flex-col")
    }

}

class BatchView extends Toggleable {

    public static icons = {
        open: Svg.compass_svg,
        has_comments: Svg.speech_bubble_svg,
        imported: Svg.addSmall_svg,
        already_mapped: Svg.checkmark_svg,
        not_found: Svg.not_found_svg,
        closed: Svg.close_svg,
        invalid: Svg.invalid_svg,
    }

    constructor(noteStates: NoteState[], state?: UserRelatedState) {

        noteStates.sort((a, b) => a.props.id - b.props.id)

        const {theme, intro, dateStr} = noteStates[0]

        const statusHist = new Map<string, number>()
        for (const noteState of noteStates) {
            const st = noteState.status
            const c = statusHist.get(st) ?? 0
            statusHist.set(st, c + 1)
        }

        const unresolvedTotal = (statusHist.get("open") ?? 0) + (statusHist.get("has_comments") ?? 0)
        const badges: (BaseUIElement)[] = [
            new FixedUiElement(dateStr).SetClass("literal-code rounded-full"),
            new FixedUiElement(noteStates.length + " total").SetClass("literal-code rounded-full ml-1 border-4 border-gray")
                .onClick(() => filterOn.setData(undefined)),
            unresolvedTotal === 0 ?
                new Combine([Svg.party_svg().SetClass("h-6 m-1"), "All done!"])
                    .SetClass("flex ml-1 mb-1 pl-1 pr-3 items-center rounded-full border border-black") :
                new FixedUiElement(Math.round(100 - 100 * unresolvedTotal / noteStates.length) + "%").SetClass("literal-code rounded-full ml-1")
        ]

        const filterOn = new UIEventSource<string>(undefined)
        Object.keys(BatchView.icons).forEach(status => {
            const count = statusHist.get(status)
            if (count === undefined) {
                return undefined
            }

            const normal = new Combine([BatchView.icons[status]().SetClass("h-6 m-1"), count + " " + status])
                .SetClass("flex ml-1 mb-1 pl-1 pr-3 items-center rounded-full border border-black")
            const selected = new Combine([BatchView.icons[status]().SetClass("h-6 m-1"), count + " " + status])
                .SetClass("flex ml-1 mb-1 pl-1 pr-3 items-center rounded-full border-4 border-black animate-pulse")

            const toggle = new ClickableToggle(selected, normal, filterOn.sync(f => f === status, [], (selected, previous) => {
                if (selected) {
                    return status;
                }
                if (previous === status) {
                    return undefined
                }
                return previous
            })).ToggleOnClick()

            badges.push(toggle)
        })


        const fullTable = new NoteTable(noteStates, state);


        super(
            new Combine([
                new Title(theme + ": " + intro, 2),
                new Combine(badges).SetClass("flex flex-wrap"),
            ]),
            new VariableUiElement(filterOn.map(filter => {
                if (filter === undefined) {
                    return fullTable
                }
                return new NoteTable(noteStates.filter(ns => ns.status === filter), state)
            })),
            {
                closeOnClick: false
            })

    }
}

class ImportInspector extends VariableUiElement {

    constructor(userDetails: { uid: number } | { display_name: string, search?: string }, state: UserRelatedState) {
        let url;

        if (userDetails["uid"] !== undefined) {
            url = "https://api.openstreetmap.org/api/0.6/notes/search.json?user=" + userDetails["uid"] + "&closed=730&limit=10000&sort=created_at&q=%23import"
        } else {
            url = "https://api.openstreetmap.org/api/0.6/notes/search.json?display_name=" +
                encodeURIComponent(userDetails["display_name"]) + "&limit=10000&closed=730&sort=created_at&q=" + encodeURIComponent(userDetails["search"] ?? "#import")
        }


        const notes: UIEventSource<{ error: string } | { success: { features: { properties: NoteProperties }[] } }> = UIEventSource.FromPromiseWithErr(Utils.downloadJson(url))
        super(notes.map(notes => {

            if (notes === undefined) {
                return new Loading("Loading notes which mention '#import'")
            }
            if (notes["error"] !== undefined) {
                return new FixedUiElement("Something went wrong: " + notes["error"]).SetClass("alert")
            }
            // We only care about the properties here
            const props: NoteProperties[] = notes["success"].features.map(f => f.properties)
            const perBatch: NoteState[][] = Array.from(ImportInspector.SplitNotesIntoBatches(props).values());
            const els: Toggleable[] = perBatch.map(noteStates => new BatchView(noteStates, state))

            const accordeon = new Accordeon(els)
            let contents = [];
            if (state?.osmConnection?.isLoggedIn?.data) {
                contents =
                    [
                        new Title(Translations.t.importInspector.title, 1),
                        new SubtleButton(undefined, "Create a new batch of imports", {url: 'import_helper.html'})]
            }
            contents.push(accordeon)
            const content = new Combine(contents)
            return new LeftIndex(
                [new TableOfContents(content, {noTopLevel: true, maxDepth: 1}).SetClass("subtle"),
                new DownloadStatisticsButton(perBatch)
                ],
                content
            )

        }));
    }

    /**
     * Creates distinct batches of note, where 'date', 'intro' and 'theme' are identical
     */
    private static SplitNotesIntoBatches(props: NoteProperties[]): Map<string, NoteState[]> {
        const perBatch = new Map<string, NoteState[]>()
        const prefix = "https://mapcomplete.osm.be/"
        for (const prop of props) {
            const lines = prop.comments[0].text.split("\n")
            const trigger = lines.findIndex(l => l.startsWith(prefix) && l.endsWith("#import"))
            if (trigger < 0) {
                continue
            }
            let theme = lines[trigger].substr(prefix.length)
            theme = theme.substr(0, theme.indexOf("."))
            const date = Utils.ParseDate(prop.date_created)
            const dateStr = date.getFullYear() + "-" + (date.getMonth() + 1) + "-" + date.getDate()
            const key = theme + lines[0] + dateStr
            if (!perBatch.has(key)) {
                perBatch.set(key, [])
            }
            let status: "open" | "closed" | "imported" | "invalid" | "already_mapped" | "not_found" | "has_comments" = "open"
            if (prop.closed_at !== undefined) {
                const lastComment = prop.comments[prop.comments.length - 1].text.toLowerCase()
                if (lastComment.indexOf("does not exist") >= 0) {
                    status = "not_found"
                } else if (lastComment.indexOf("already mapped") >= 0) {
                    status = "already_mapped"
                } else if (lastComment.indexOf("invalid") >= 0 || lastComment.indexOf("incorrecto") >= 0) {
                    status = "invalid"
                } else if (["imported","erbij","toegevoegd","added"].some(keyword => lastComment.toLowerCase().indexOf(keyword) >= 0)) {
                    status = "imported"
                } else {
                    status = "closed"
                }
            } else if (prop.comments.length > 1) {
                status = "has_comments"
            }

            perBatch.get(key).push({
                props: prop,
                intro: lines[0],
                theme,
                dateStr,
                status
            })
        }
        return perBatch;
    }
}

class ImportViewerGui extends LoginToggle {

    constructor() {
        const state = new UserRelatedState(undefined)
        const displayNameParam = QueryParameters.GetQueryParameter("user", "", "The username of the person whom you want to see the notes for");
        const searchParam = QueryParameters.GetQueryParameter("search", "", "A text that should be included in the first comment of the note to be shown")
        super(
            new VariableUiElement(state.osmConnection.userDetails.map(ud => {
                const display_name = displayNameParam.data;
                const search = searchParam.data;
                if (display_name !== "" && search !== "") {
                    return new ImportInspector({display_name, search}, undefined);
                }
                return new ImportInspector(ud, state);
            }, [displayNameParam, searchParam])),
            "Login to inspect your import flows", state
        )
    }
}

new ImportViewerGui().AttachTo("main")