// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {
    deriveChannelClassificationBanner,
    deriveClassificationBannerState,
} from './classification';

import type {PropertyFieldModel, PropertyValueModel} from '@database/models/server';

type ClassificationField = Pick<PropertyFieldModel, 'id' | 'name' | 'objectType' | 'attrs'>;
type ClassificationValue = Pick<PropertyValueModel, 'fieldId' | 'value'>;

const systemField: ClassificationField = {
    id: 'sys-1',
    name: 'classification',
    objectType: 'system',
    attrs: {
        actions: ['display_banner_top'],
        options: [
            {id: 'opt-ts', name: 'TOP SECRET', color: '#FCE83A'},
            {id: 'opt-s', name: 'SECRET', color: '#FF0000'},
        ],
    },
};

const systemValue: ClassificationValue = {fieldId: 'sys-1', value: 'opt-ts'};

describe('deriveClassificationBannerState', () => {
    it('should return hidden state when there are no fields', () => {
        const result = deriveClassificationBannerState([], [systemValue]);
        expect(result).toEqual({visible: false, levelName: '', color: ''});
    });

    it('should return hidden state when the system field is absent', () => {
        const channelOnly: ClassificationField = {...systemField, name: 'classification', objectType: 'channel'};
        const result = deriveClassificationBannerState([channelOnly], [systemValue]);
        expect(result).toEqual({visible: false, levelName: '', color: ''});
    });

    it('should return hidden state when DISPLAY_BANNER_TOP action is missing', () => {
        const noActionField: ClassificationField = {...systemField, attrs: {...systemField.attrs, actions: []}};
        const result = deriveClassificationBannerState([noActionField], [systemValue]);
        expect(result).toEqual({visible: false, levelName: '', color: ''});
    });

    it('should return hidden state when no system value is set', () => {
        const result = deriveClassificationBannerState([systemField], []);
        expect(result).toEqual({visible: false, levelName: '', color: ''});
    });

    it('should return visible state with correct level on happy path', () => {
        const result = deriveClassificationBannerState([systemField], [systemValue]);
        expect(result).toEqual({
            visible: true,
            levelName: 'TOP SECRET',
            color: '#FCE83A',
        });
    });

    it('should return hidden state when option id does not match any option', () => {
        const badValue: ClassificationValue = {...systemValue, value: 'non-existent-opt'};
        const result = deriveClassificationBannerState([systemField], [badValue]);
        expect(result).toEqual({visible: false, levelName: '', color: ''});
    });
});

const channelField: ClassificationField = {
    id: 'cf-1',
    name: 'classification',
    objectType: 'channel',
    attrs: {
        options: [
            {id: 'level-secret', name: 'Secret', color: '#FF0000'},
            {id: 'level-public', name: 'Public', color: '#00FF00'},
        ],
    },
};

const channelValue: ClassificationValue = {fieldId: 'cf-1', value: 'level-secret'};

describe('deriveChannelClassificationBanner', () => {
    it('should return no classification when there are no fields', () => {
        const result = deriveChannelClassificationBanner([], []);
        expect(result.hasClassification).toBe(false);
        expect(result.classificationBanner).toBeUndefined();
    });

    it('should return no classification when there is no channel value', () => {
        const result = deriveChannelClassificationBanner([channelField], []);
        expect(result.hasClassification).toBe(false);
    });

    it('should resolve classification banner from channel value and field options', () => {
        const result = deriveChannelClassificationBanner([channelField], [channelValue]);
        expect(result.hasClassification).toBe(true);
        expect(result.classificationBanner).toEqual({
            enabled: true,
            text: '**Secret**',
            background_color: '#FF0000',
        });
    });

    it('should use native banner text when provided', () => {
        const result = deriveChannelClassificationBanner([channelField], [channelValue], 'Custom banner text');
        expect(result.hasClassification).toBe(true);
        expect(result.classificationBanner?.text).toBe('Custom banner text');
        expect(result.classificationBanner?.background_color).toBe('#FF0000');
    });

    it('should return no classification when level id does not match any option', () => {
        const unknownValue: ClassificationValue = {...channelValue, value: 'nonexistent-level'};
        const result = deriveChannelClassificationBanner([channelField], [unknownValue]);
        expect(result.hasClassification).toBe(false);
    });
});