import { globals } from '../config/globals.js';
import { toast } from './Toast.js';
import { ModalManager } from './ModalManager.js';

export class DeckStateManager {
    constructor () {
        this.deck = null;
        this.customRoleOptions = [];
        this.createMode = false;
        this.currentlyEditingRoleName = null;
    }

    addToDeck (role) {
        const option = this.customRoleOptions.find((option) => option.role === role);
        if (option) {
            option.quantity = 0;
            this.deck.push(option);
            this.customRoleOptions.splice(this.customRoleOptions.indexOf(option), 1);
        }
    }

    addToCustomRoleOptions (role) {
        this.customRoleOptions.push(role);
        localStorage.setItem('play-werewolf-custom-roles', JSON.stringify(this.customRoleOptions.concat(this.deck.filter(card => card.custom === true))));
    }

    updateCustomRoleOption (option, name, description, team) {
        option.role = name;
        option.description = description;
        option.team = team;
        localStorage.setItem('play-werewolf-custom-roles', JSON.stringify(this.customRoleOptions.concat(this.deck.filter(card => card.custom === true))));
    }

    removeFromCustomRoleOptions (name) {
        const option = this.customRoleOptions.find((option) => option.role === name);
        if (option) {
            this.customRoleOptions.splice(this.customRoleOptions.indexOf(option), 1);
            localStorage.setItem('play-werewolf-custom-roles', JSON.stringify(this.customRoleOptions.concat(this.deck.filter(card => card.custom === true))));
            toast('"' + name + '" deleted.', 'error', true, true, 'short');
        }
    }

    addCopyOfCard (role) {
        const existingCard = this.deck.find((card) => card.role === role);
        if (existingCard) {
            existingCard.quantity += 1;
        }
    }

    removeCopyOfCard (role) {
        const existingCard = this.deck.find((card) => card.role === role);
        if (existingCard && existingCard.quantity > 0) {
            existingCard.quantity -= 1;
        }
    }

    getCurrentDeck () { return this.deck; }

    getCard (role) {
        return this.deck.find(
            (card) => card.role.toLowerCase().trim() === role.toLowerCase().trim()
        );
    }

    getCurrentCustomRoleOptions () { return this.customRoleOptions; }

    getCustomRoleOption (role) {
        return this.customRoleOptions.find(
            (option) => option.role.toLowerCase().trim() === role.toLowerCase().trim()
        );
    };

    getDeckSize () {
        let total = 0;
        for (const role of this.deck) {
            total += role.quantity;
        }
        return total;
    }

    loadCustomRolesFromCookies () {
        const customRoles = localStorage.getItem('play-werewolf-custom-roles');
        if (customRoles !== null && validateCustomRoleCookie(customRoles)) {
            this.customRoleOptions = JSON.parse(customRoles); // we know it is valid JSON from the validate function
        }
    }

    loadCustomRolesFromFile (file, updateRoleListFunction, loadDefaultCardsFn, showIncludedCardsFn) {
        const reader = new FileReader();
        reader.onerror = (e) => {
            toast(reader.error.message, 'error', true, true, 'medium');
        };
        reader.onload = (e) => {
            let string;
            if (typeof e.target.result !== 'string') {
                string = new TextDecoder('utf-8').decode(e.target.result);
            } else {
                string = e.target.result;
            }
            if (validateCustomRoleCookie(string)) {
                this.customRoleOptions = JSON.parse(string); // we know it is valid JSON from the validate function
                ModalManager.dispelModal('upload-custom-roles-modal', 'modal-background');
                toast('Roles imported successfully', 'success', true, true, 'short');
                localStorage.setItem('play-werewolf-custom-roles', JSON.stringify(this.customRoleOptions));
                updateRoleListFunction(this, document.getElementById('deck-select'));
                // loadDefaultCardsFn(this);
                // showIncludedCardsFn(this);
            } else {
                toast(
                    'Invalid formatting. Make sure you import the file as downloaded from this page.',
                    'error',
                    true,
                    true,
                    'medium'
                );
            }
        };
        reader.readAsText(file);
    }

    // via https://stackoverflow.com/a/18197341
    downloadCustomRoles (filename, text) {
        const element = document.createElement('a');
        element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
        element.setAttribute('download', filename);

        element.style.display = 'none';
        document.body.appendChild(element);

        element.click();

        document.body.removeChild(element);
    }
}

// this is user-supplied, so we should validate it fully
function validateCustomRoleCookie (cookie) {
    const valid = false;
    if (typeof cookie === 'string' && new Blob([cookie]).size <= 1000000) {
        try {
            const cookieJSON = JSON.parse(cookie);
            if (Array.isArray(cookieJSON)) {
                for (const entry of cookieJSON) {
                    if (typeof entry === 'object') {
                        if (typeof entry.role !== 'string' || entry.role.length > globals.MAX_CUSTOM_ROLE_NAME_LENGTH
                            || typeof entry.team !== 'string' || (entry.team !== globals.ALIGNMENT.GOOD && entry.team !== globals.ALIGNMENT.EVIL)
                            || typeof entry.description !== 'string' || entry.description.length > globals.MAX_CUSTOM_ROLE_DESCRIPTION_LENGTH
                        ) {
                            return false;
                        }
                    } else {
                        return false;
                    }
                }
                return true;
            }
        } catch (e) {
            return false;
        }
    }

    return valid;
}