import { CharacterIdentifier, UpdateBasicInfoRequest, UpdateSkillValueRequest, UpdateAttributeRequest, UpdateMeritsRequest } from "../../_proto/cofd_api_pb";
import { CofdSheet } from "../../_proto/cofd_pb";
import * as api from "../api";

// This is the scripting for the edit character page, which submits
// changes to the server as the user makes them.

(async () => {
    // Useful for making sure elements actually exist in event handler.
    type Option<T> = T | null | undefined;

    const [, , USERNAME, CHARACTER_ID] = window.location.pathname.split('/');

    function characterId(): CharacterIdentifier {
        const id = new CharacterIdentifier();
        id.setId(parseInt(CHARACTER_ID));
        id.setOwner(USERNAME);
        return id;
    }

    const getTextValue = (selector: string) =>
        document.querySelector<HTMLInputElement>(selector)?.value ?? "";

    const getIntValue = (selector: string) =>
        parseInt(document.querySelector<HTMLInputElement>(selector)?.value ?? "0")

    function setupAttributes() {
        const attributeInputs = document.querySelectorAll('#attributes input[type="number"]');

        async function attributeHandler(event: Event) {
            const input = event.target as Option<HTMLInputElement>;
            if (!input) return;

            console.log("updating attr");
            const attribute = input.id;
            const newValue = parseInt(input.value);
            const params = new UpdateAttributeRequest();
            params.setCharacter(characterId());
            params.setAttributeName(attribute);
            params.setAttributeValue(newValue);
            let resp = await api.updateAttributeValue(params);
            console.log("got a response back", resp);
        }

        Array.from(attributeInputs).forEach(input => {
            input.addEventListener('change', attributeHandler);
        });
    }

    function setupSkills() {
        const skillInputs = document.querySelectorAll('#skills input[type="number"]');

        async function skillValueHandler(event: Event) {
            const input = event.target as Option<HTMLInputElement>;
            if (!input) return;

            console.log("updating skill");
            const attribute = input.id;
            const newValue = parseInt(input.value);

            const params = new UpdateSkillValueRequest();
            params.setCharacter(characterId());
            params.setSkillName(attribute);
            params.setSkillValue(newValue);

            let resp = await api.updateSkillValue(params);
            console.log("got a response back", resp);
        }

        Array.from(skillInputs).forEach(input => {
            input.addEventListener('change', skillValueHandler);
        });
    }

    function setupBasicInfo() {
        async function updateInfo() {
            const params = new UpdateBasicInfoRequest();

            params.setCharacter(characterId());
            params.setName(getTextValue("#characterName"));
            params.setAge(getIntValue("#age"));
            params.setConcept(getTextValue("#concept"));
            params.setChronicle(getTextValue("#chronicle"));
            params.setGender(getTextValue("#gender"));

            let resp = await api.updateBasicInfo(params);
            console.log("got a response back", resp);
        }

        const inputs = document.querySelectorAll("#basicInfo input");

        inputs.forEach(input => {
            console.log('got an input', input);
            input.addEventListener('blur', updateInfo);
        });
    }

    function setupMerits() {
        async function updateMerits() {
            let meritElements = document.querySelectorAll<HTMLInputElement>('#merits input[class="merit-name"]');
            let merits: CofdSheet.Merit[] =
                Array.from(meritElements).map(input => {
                    const dotsInput = input.parentElement?.querySelector<HTMLInputElement>('input[class="merit-dots"]');

                    let dotsAmount = dotsInput?.value ?? "0";
                    if (dotsAmount.length == 0) { dotsAmount = "0"; }

                    const merit = new CofdSheet.Merit();
                    merit.setName(input.value);
                    merit.setDots(parseInt(dotsAmount));

                    return merit;
                });

            const params = new UpdateMeritsRequest();
            params.setCharacter(characterId());
            params.setMeritsList(merits);

            let resp = await api.updateMerits(params);
            console.log("got a response back", resp);
        }

        async function removeMerit(event: Event) {
            const button = event.target as Option<Element>;
            const meritLine = button?.parentElement;
            if (meritLine) {
                document.querySelector("#merit-list")?.removeChild(meritLine);
                await updateMerits();
            }
        }

        function addMeritLine() {
            const meritName = document.createElement('input');
            meritName.type = 'text';
            meritName.value = '';
            meritName.classList.add('merit-name');

            const meritDots = document.createElement('input');
            meritDots.type = 'number';
            meritDots.min = '0';
            meritDots.value = '0';
            meritDots.classList.add('merit-dots');

            const removeButton = document.createElement('button');
            removeButton.innerText = "X";
            removeButton.setAttribute('data-event-type', 'remove-merit');

            const dots = document.createElement('span');
            dots.innerText = 'Dots';

            const merit = document.createElement('div');
            merit.classList.add('merit');
            merit.appendChild(meritName);
            merit.appendChild(meritDots);
            merit.appendChild(dots);
            merit.appendChild(removeButton);

            document.querySelector<HTMLDivElement>("#merit-list")?.appendChild(merit);
        }

        async function processControlEvent(event: Event) {
            console.log('processing merit control event');
            const element = event.target as Element;
            const eventType = element.getAttribute('data-event-type') ?? '';

            if (eventType == 'remove-merit') {
                await removeMerit(event);
            } else if (eventType == 'add-merit') {
                addMeritLine();
            }
        }

        const meritControls = document.querySelector<HTMLDivElement>("#merit-controls");
        meritControls?.addEventListener('click', processControlEvent);

        const meritList = document.querySelector<HTMLDivElement>("#merit-list");
        meritList?.addEventListener('click', processControlEvent);
        meritList?.addEventListener('blur', updateMerits);
        meritList?.addEventListener('change', updateMerits);
    }

    setupAttributes();
    setupSkills();
    setupBasicInfo();
    setupMerits();
})().catch(e => {
    alert(e);
});