const { ApplicationV2, HandlebarsApplicationMixin } = foundry.applications.api;

export default class DamageSelectionDialog extends HandlebarsApplicationMixin(ApplicationV2) {
    constructor(rollString, bonusDamage, resolve, hope = 0) {
        super({});

        this.data = {
            rollString,
            bonusDamage: bonusDamage.reduce((acc, x) => {
                if (x.appliesOn === SYSTEM.EFFECTS.applyLocations.damageRoll.id) {
                    acc.push({
                        ...x,
                        hopeUses: 0
                    });
                }

                return acc;
            }, []),
            hope
        };
        this.resolve = resolve;
    }

    static DEFAULT_OPTIONS = {
        tag: 'form',
        classes: ['daggerheart', 'views', 'damage-selection'],
        position: {
            width: 400,
            height: 'auto'
        },
        actions: {
            decreaseHopeUse: this.decreaseHopeUse,
            increaseHopeUse: this.increaseHopeUse,
            rollDamage: this.rollDamage
        },
        form: {
            handler: this.updateSelection,
            submitOnChange: true,
            closeOnSubmit: false
        }
    };

    /** @override */
    static PARTS = {
        damageSelection: {
            id: 'damageSelection',
            template: 'systems/daggerheart/templates/views/damageSelection.hbs'
        }
    };

    /* -------------------------------------------- */

    /** @inheritDoc */
    get title() {
        return `Damage Options`;
    }

    async _prepareContext(_options) {
        return {
            rollString: this.getRollString(),
            bonusDamage: this.data.bonusDamage,
            hope: this.data.hope + 1,
            hopeUsed: this.getHopeUsed()
        };
    }

    static updateSelection(event, _, formData) {
        const { bonusDamage, ...rest } = foundry.utils.expandObject(formData.object);

        for (var index in bonusDamage) {
            this.data.bonusDamage[index].initiallySelected = bonusDamage[index].initiallySelected;
            if (bonusDamage[index].hopeUses) {
                const value = Number.parseInt(bonusDamage[index].hopeUses);
                if (!Number.isNaN(value)) this.data.bonusDamage[index].hopeUses = value;
            }
        }

        this.data = foundry.utils.mergeObject(this.data, rest);
        this.render(true);
    }

    getRollString() {
        return this.data.rollString.concat(
            this.data.bonusDamage.reduce((acc, x) => {
                if (x.initiallySelected) {
                    const nr = 1 + x.hopeUses;
                    const baseDamage = x.value;
                    return acc.concat(` + ${nr}${baseDamage}`);
                }

                return acc;
            }, '')
        );
    }

    getHopeUsed() {
        return this.data.bonusDamage.reduce((acc, x) => acc + x.hopeUses, 0);
    }

    static decreaseHopeUse(_, button) {
        const index = Number.parseInt(button.dataset.index);
        if (this.data.bonusDamage[index].hopeUses - 1 >= 0) {
            this.data.bonusDamage[index].hopeUses -= 1;
            this.render(true);
        }
    }

    static increaseHopeUse(_, button) {
        const index = Number.parseInt(button.dataset.index);
        if (this.data.bonusDamage[index].hopeUses <= this.data.hope + 1) {
            this.data.bonusDamage[index].hopeUses += 1;
            this.render(true);
        }
    }

    static rollDamage() {
        this.resolve({
            rollString: this.getRollString(),
            bonusDamage: this.data.bonusDamage,
            hopeUsed: this.getHopeUsed()
        });
        this.close();
    }
}

// export default class DamageSelectionDialog extends FormApplication {
//     constructor(rollString, bonusDamage, resolve){
//         super({}, {});

//         this.data = {
//             rollString,
//             bonusDamage: bonusDamage.map(x => ({
//                 ...x,
//                 hopeUses: 0
//             })),
//         }
//         this.resolve = resolve;
//     }

//     get title (){
//       return 'Damage Options';
//     }

//     static get defaultOptions() {
//         const defaults = super.defaultOptions;
//         const overrides = {
//           height: 'auto',
//           width: 400,
//           id: 'damage-selection',
//           template: 'systems/daggerheart/templates/views/damageSelection.hbs',
//           closeOnSubmit: false,
//           classes: ["daggerheart", "views", "damage-selection"],
//         };

//         const mergedOptions = foundry.utils.mergeObject(defaults, overrides);

//         return mergedOptions;
//     }

//     async getData(){
//         const context = super.getData();
//         context.rollString = this.data.rollString;
//         context.bonusDamage = this.data.bonusDamage;

//         return context;
//     }

//     activateListeners(html) {
//         super.activateListeners(html);

//         html.find('.roll-button').click(this.finish.bind(this));
//         html.find('.').change();
//     }

//     // async _updateObject(_, formData) {
//     //     const data = foundry.utils.expandObject(formData);
//     //     this.data = foundry.utils.mergeObject(this.data, data);
//     //     this.render(true);
//     // }

//     finish(){
//       this.resolve(this.data);
//       this.close();
//     }
//   }