import { CoreApi, Group, User } from "authentik-api";
import { t } from "@lingui/macro";
import { customElement } from "lit-element";
import { html, TemplateResult } from "lit-html";
import { DEFAULT_CONFIG } from "../../api/Config";
import { until } from "lit-html/directives/until";
import { ifDefined } from "lit-html/directives/if-defined";
import "../../elements/forms/HorizontalFormElement";
import "../../elements/CodeMirror";
import "../../elements/chips/ChipGroup";
import "../../elements/chips/Chip";
import "./MemberSelectModal";
import YAML from "yaml";
import { first } from "../../utils";
import { ModelForm } from "../../elements/forms/ModelForm";

@customElement("ak-group-form")
export class GroupForm extends ModelForm<Group, string> {

    loadInstance(pk: string): Promise<Group> {
        return new CoreApi(DEFAULT_CONFIG).coreGroupsRetrieve({
            groupUuid: pk
        });
    }

    getSuccessMessage(): string {
        if (this.instance) {
            return t`Successfully updated group.`;
        } else {
            return t`Successfully created group.`;
        }
    }

    send = (data: Group): Promise<Group> => {
        if (this.instance?.pk) {
            return new CoreApi(DEFAULT_CONFIG).coreGroupsUpdate({
                groupUuid: this.instance.pk || "",
                groupRequest: data
            });
        } else {
            data.users = Array.from(this.instance?.users || []) as unknown as Set<number>;
            return new CoreApi(DEFAULT_CONFIG).coreGroupsCreate({
                groupRequest: data
            });
        }
    };

    renderForm(): TemplateResult {
        return html`<form class="pf-c-form pf-m-horizontal">
            <ak-form-element-horizontal
                label=${t`Name`}
                ?required=${true}
                name="name">
                <input type="text" value="${ifDefined(this.instance?.name)}" class="pf-c-form-control" required>
            </ak-form-element-horizontal>
            <ak-form-element-horizontal name="isSuperuser">
                <div class="pf-c-check">
                    <input type="checkbox" class="pf-c-check__input" ?checked=${first(this.instance?.isSuperuser, false)}>
                    <label class="pf-c-check__label">
                        ${t`Is superuser`}
                    </label>
                </div>
                <p class="pf-c-form__helper-text">${t`Users added to this group will be superusers.`}</p>
            </ak-form-element-horizontal>
            <ak-form-element-horizontal
                label=${t`Parent`}
                name="parent">
                <select class="pf-c-form-control">
                    <option value="" ?selected=${this.instance?.parent === undefined}>---------</option>
                    ${until(new CoreApi(DEFAULT_CONFIG).coreGroupsList({}).then(groups => {
                        return groups.results.map(group => {
                            return html`<option value=${ifDefined(group.pk)} ?selected=${this.instance?.parent === group.pk}>${group.name}</option>`;
                        });
                    }), html`<option>${t`Loading...`}</option>`)}
                </select>
            </ak-form-element-horizontal>
            <ak-form-element-horizontal
                label=${t`Members`}
                name="users">
                <div class="pf-c-input-group">
                    <ak-group-member-select-table
                        .confirm=${(items: User[]) => {
                            // Because the model only has the IDs, map the user list to IDs
                            const ids = items.map(u => u.pk || 0);
                            if (!this.instance) this.instance = {} as Group;
                            this.instance.users = new Set(Array.from(this.instance?.users || []).concat(ids));
                            this.requestUpdate();
                            return Promise.resolve();
                        }}>
                        <button slot="trigger" class="pf-c-button pf-m-control" type="button">
                            <i class="fas fa-plus" aria-hidden="true"></i>
                        </button>
                    </ak-group-member-select-table>
                    <div class="pf-c-form-control">
                        <ak-chip-group>
                            ${until(new CoreApi(DEFAULT_CONFIG).coreUsersList({
                                ordering: "username",
                            }).then(users => {
                                return users.results.map(user => {
                                    const selected = Array.from(this.instance?.users || []).some(su => {
                                        return su == user.pk;
                                    });
                                    if (!selected) return;
                                    return html`<ak-chip
                                        .removable=${true}
                                        value=${ifDefined(user.pk)}
                                        @remove=${() => {
                                            if (!this.instance) return;
                                            const users = Array.from(this.instance?.users || []);
                                            const idx = users.indexOf(user.pk || 0);
                                            users.splice(idx, 1);
                                            this.instance.users = new Set(users);
                                            this.requestUpdate();
                                        }}>
                                        ${user.username}
                                    </ak-chip>`;
                                });
                            }), html`<option>${t`Loading...`}</option>`)}
                        </ak-chip-group>
                    </div>
                </div>
                <p class="pf-c-form__helper-text">${t`Hold control/command to select multiple items.`}</p>
            </ak-form-element-horizontal>
            <ak-form-element-horizontal
                label=${t`Attributes`}
                ?required=${true}
                name="attributes">
                <ak-codemirror mode="yaml" value="${YAML.stringify(first(this.instance?.attributes, {}))}">
                </ak-codemirror>
                <p class="pf-c-form__helper-text">${t`Set custom attributes using YAML or JSON.`}</p>
            </ak-form-element-horizontal>
        </form>`;
    }

}