import React from 'react';
import {compact, isString} from 'lodash';

import ResourceLink from '../generic/resource_link';
import RoleLink from '../generic/role_link';

function humanizeKindResource(e) {
    var msg;

    if (e.action === 'check') {
        if (e.allowed) {
            msg = [
                'performed ',
                (<em>{e.privilege}</em>),
                ' on ',
                <ResourceLink id={e.resource} noIcon={true} />
            ];

        } else {
            msg = [
                'was ',
                (<strong>denied permission</strong>),
                ' to ',
                (<em>{e.privilege}</em>),
                ' ',
                <ResourceLink id={e.resource} noIcon={true} />
            ];
        }

    } else if (e.action === 'create') {
        msg = [
            ' created ',
            <ResourceLink id={e.resource} noIcon={true} />,
            ' owned by ',
            <RoleLink id={e.owner} noIcon={true} />
        ];

    } else if (e.action === 'update') {
        // this is suspicious, but CLI audit does this
        msg = [
            ' gave ',
            <ResourceLink id={e.resource} noIcon={true} />,
            ' to ',
            <RoleLink id={e.owner} noIcon={true} />
        ];

    } else if (e.action === 'destroy') {
        msg = [
            ' deleted ',
            <ResourceLink id={e.resource} noIcon={true} />
        ];

    } else if (e.action === 'permit') {
        msg = [
            ' permitted ',
            <RoleLink id={e.grantee} noIcon={true} />,
            ' to ',
            (<em>{e.privilege}</em>),
            ' ',
            <ResourceLink id={e.resource} noIcon={true} />
        ];

        if (e.grant_option) {
            msg.push(' with grant option');
        }

    } else if (e.action === 'deny') {
        msg = [
            ' denied ',
            (<em>{e.privilege}</em>),
            ' from ',
            <RoleLink id={e.grantee} noIcon={true} />,
            ' on ',
            <ResourceLink id={e.resource} noIcon={true} />
        ];

    } else if (e.action === 'permitted_roles') {
        msg = [
            ' listed roles permitted to ',
            (<em>{e.privilege}</em>),
            ' on ',
            <ResourceLink id={e.resource} noIcon={true} />
        ];
    }

    return msg;
}

function humanizeKindRole(e) {
    var msg;

    if (e.action === 'check') {
        if (e.allowed) {
            msg = [
                ' performed ',
                (<em>{e.privilege}</em>),
                ' on ',
                <ResourceLink id={e.resource} noIcon={true} />
            ];

        } else {
            msg = [
                ' was ',
                (<strong>denied permission</strong>),
                ' to ',
                (<em>{e.privilege}</em>),
                ' on ',
                <ResourceLink id={e.resource} noIcon={true} />
            ];
        }

    } else if (e.action === 'grant') {
        /* what was the point of commenting this out? */
        msg = [
            ' granted role ',
            <RoleLink id={e.role} noIcon={true} />,
            ' to ',
            <RoleLink id={e.member} noIcon={true} />
        ];

        if (e.admin_option) {
            msg.push(' with admin permission');
        } else {
            msg.push(' without admin permission');
        }

    } else if (e.action === 'revoke') {
        msg = [
            ' revoked role ',
            <RoleLink id={e.role} noIcon={true} />,
            ' from ',
            <RoleLink id={e.member} noIcon={true} />
        ];

    } else if (e.action === 'create') {
        msg = [
            ' created role ',
            <RoleLink id={e.role} noIcon={true} />
        ];
    }

    return msg;
}

function humanizeKindAnnotation(e) {
    var msg;

    if (e.action === 'update') {
        msg = [
            ' updated annotation on ',
            <ResourceLink id={e.resource} noIcon={true} />
        ];
    }

    return msg;
}

function humanizeKindAudit(e) {
    var msg,
        actionPart = compact([e.facility, e.action]).join(':'),
        parts = [actionPart];

    if (isString(e.role)) {
        parts.push(' by ');
        parts.push(<RoleLink id={e.role} noIcon={true} />);
    }

    if (isString(e.resource_id)) {
        parts.push(' on');
        parts.push(<ResourceLink id={e.resource_id} noIcon={true} />);
    }

    if (isString(e.allowed)) {
        parts.push(' (allowed: ' + e.allowed + ')');
    }

    msg = [' reported ', parts];

    if (isString(e.audit_message)) {
        msg.push('; message: ');
        msg.push(e.audit_message);
    }

    return msg;
}

// TODO: make message a separate React Class
export default function humanizeEvent(e) {
    // copy of SHORT_FORMATS logic from cli-ruby:lib/conjur/command/audit.rb
    var msg = [];

    if (e.kind === 'resource') {
        msg = humanizeKindResource(e);

    } else if (e.kind === 'role') {
        msg = humanizeKindRole(e);

    } else if (e.kind === 'annotation') {
        msg = humanizeKindAnnotation(e);

    } else if (e.kind === 'audit') {
        msg = humanizeKindAudit(e);

    } else {
        msg = [' unknown event: ' + e.kind + ':' + e.action + '!'];
    }

    if (isString(e.error)) {
        msg.push(' (failed with ' + e.error + ')');
    }

    return msg;
}