import { parallel, HarnessPredicate } from '@angular/cdk/testing';
import { MatOptionHarness, MatOptgroupHarness } from '@angular/material/core/testing';
import { MatFormFieldControlHarness } from '@angular/material/form-field/testing/control';

class _MatSelectHarnessBase extends MatFormFieldControlHarness {
    constructor() {
        super(...arguments);
        this._documentRootLocator = this.documentRootLocatorFactory();
        this._backdrop = this._documentRootLocator.locatorFor('.cdk-overlay-backdrop');
    }
    /** Gets a boolean promise indicating if the select is disabled. */
    async isDisabled() {
        return (await this.host()).hasClass(`${this._prefix}-select-disabled`);
    }
    /** Gets a boolean promise indicating if the select is valid. */
    async isValid() {
        return !(await (await this.host()).hasClass('ng-invalid'));
    }
    /** Gets a boolean promise indicating if the select is required. */
    async isRequired() {
        return (await this.host()).hasClass(`${this._prefix}-select-required`);
    }
    /** Gets a boolean promise indicating if the select is empty (no value is selected). */
    async isEmpty() {
        return (await this.host()).hasClass(`${this._prefix}-select-empty`);
    }
    /** Gets a boolean promise indicating if the select is in multi-selection mode. */
    async isMultiple() {
        return (await this.host()).hasClass(`${this._prefix}-select-multiple`);
    }
    /** Gets a promise for the select's value text. */
    async getValueText() {
        const value = await this.locatorFor(`.${this._prefix}-select-value`)();
        return value.text();
    }
    /** Focuses the select and returns a void promise that indicates when the action is complete. */
    async focus() {
        return (await this.host()).focus();
    }
    /** Blurs the select and returns a void promise that indicates when the action is complete. */
    async blur() {
        return (await this.host()).blur();
    }
    /** Whether the select is focused. */
    async isFocused() {
        return (await this.host()).isFocused();
    }
    /** Gets the options inside the select panel. */
    async getOptions(filter) {
        return this._documentRootLocator.locatorForAll(this._optionClass.with({
            ...(filter || {}),
            ancestor: await this._getPanelSelector(),
        }))();
    }
    /** Gets the groups of options inside the panel. */
    async getOptionGroups(filter) {
        return this._documentRootLocator.locatorForAll(this._optionGroupClass.with({
            ...(filter || {}),
            ancestor: await this._getPanelSelector(),
        }))();
    }
    /** Gets whether the select is open. */
    async isOpen() {
        return !!(await this._documentRootLocator.locatorForOptional(await this._getPanelSelector())());
    }
    /** Opens the select's panel. */
    async open() {
        if (!(await this.isOpen())) {
            const trigger = await this.locatorFor(`.${this._prefix}-select-trigger`)();
            return trigger.click();
        }
    }
    /**
     * Clicks the options that match the passed-in filter. If the select is in multi-selection
     * mode all options will be clicked, otherwise the harness will pick the first matching option.
     */
    async clickOptions(filter) {
        await this.open();
        const [isMultiple, options] = await parallel(() => [
            this.isMultiple(),
            this.getOptions(filter),
        ]);
        if (options.length === 0) {
            throw Error('Select does not have options matching the specified filter');
        }
        if (isMultiple) {
            await parallel(() => options.map(option => option.click()));
        }
        else {
            await options[0].click();
        }
    }
    /** Closes the select's panel. */
    async close() {
        if (await this.isOpen()) {
            // This is the most consistent way that works both in both single and multi-select modes,
            // but it assumes that only one overlay is open at a time. We should be able to make it
            // a bit more precise after #16645 where we can dispatch an ESCAPE press to the host instead.
            return (await this._backdrop()).click();
        }
    }
    /** Gets the selector that should be used to find this select's panel. */
    async _getPanelSelector() {
        const id = await (await this.host()).getAttribute('id');
        return `#${id}-panel`;
    }
}
/** Harness for interacting with an MDC-based mat-select in tests. */
class MatSelectHarness extends _MatSelectHarnessBase {
    constructor() {
        super(...arguments);
        this._prefix = 'mat-mdc';
        this._optionClass = MatOptionHarness;
        this._optionGroupClass = MatOptgroupHarness;
    }
    static { this.hostSelector = '.mat-mdc-select'; }
    /**
     * Gets a `HarnessPredicate` that can be used to search for a select with specific attributes.
     * @param options Options for filtering which select instances are considered a match.
     * @return a `HarnessPredicate` configured with the given options.
     */
    static with(options = {}) {
        return new HarnessPredicate(this, options).addOption('disabled', options.disabled, async (harness, disabled) => {
            return (await harness.isDisabled()) === disabled;
        });
    }
}

export { MatSelectHarness, _MatSelectHarnessBase };
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