import {describe, expect, test} from 'bun:test'
import {
    type ACMClient,
    DeleteCertificateCommand,
    DescribeCertificateCommand,
    ExportCertificateCommand,
    GetCertificateCommand,
    ImportCertificateCommand,
    ListCertificatesCommand,
    RequestCertificateCommand,
    RevokeCertificateCommand,
} from '@aws-sdk/client-acm'
import {AwsCertificatesAdapter} from './AwsCertificatesAdapter'
import {ValidationError} from '../cloud-spi/errors'

type SendResult = Record<string, unknown>

function stubAcm(handler: (command: object) => SendResult | Promise<SendResult>) {
    const sent: object[] = []
    const client = {
        async send(command: object) {
            sent.push(command)
            return handler(command)
        },
    } as unknown as ACMClient
    return {client, sent}
}

function awsError(name: string, status = 400): Error {
    return Object.assign(new Error(name), {name, $metadata: {httpStatusCode: status}})
}

const ID = '5ed9dc37-d9fb-456e-911e-e87f091480ba'
const ARN = `arn:aws:acm:us-east-1:000000000000:certificate/${ID}`
const detail = {
    CertificateArn: ARN,
    DomainName: 'notes.thecloud.localhost',
    SubjectAlternativeNames: ['notes.thecloud.localhost', 'api.thecloud.localhost'],
    DomainValidationOptions: [{
        DomainName: 'notes.thecloud.localhost',
        ValidationStatus: 'SUCCESS',
        ValidationMethod: 'DNS',
        ResourceRecord: {Name: '_a1.notes.thecloud.localhost.', Type: 'CNAME', Value: '_e8.acm-validations.aws.'},
    }],
    Status: 'ISSUED',
    Type: 'AMAZON_ISSUED',
    KeyAlgorithm: 'RSA-2048',
    Issuer: 'CN=Floci Local CA',
    CreatedAt: new Date('2026-10-25T16:28:12Z'),
    NotAfter: new Date('2027-10-25T16:28:12Z'),
    InUseBy: ['arn:aws:elasticloadbalancing:us-east-1:000000000000:loadbalancer/app/web/1'],
    Options: {Export: 'ENABLED', CertificateTransparencyLoggingPreference: 'ENABLED'},
}

function adapterWith(handler: (command: object) => SendResult | Promise<SendResult>) {
    const stub = stubAcm(handler)
    return {...stub, adapter: new AwsCertificatesAdapter(stub.client, '000000000000', 'us-east-1')}
}

describe('AwsCertificatesAdapter', () => {
    test('lists every key type across pages and searches the alternative names too', async () => {
        const {adapter, sent} = adapterWith((command) => {
            if (!(command instanceof ListCertificatesCommand)) return {}
            return command.input.NextToken
                ? {CertificateSummaryList: [{CertificateArn: ARN.replace(ID, '11111111-2222-3333-4444-555555555555'), DomainName: 'shop.test', Type: 'IMPORTED', Status: 'ISSUED', InUse: false}]}
                : {CertificateSummaryList: [{CertificateArn: ARN, DomainName: 'notes.thecloud.localhost', SubjectAlternativeNameSummaries: ['notes.thecloud.localhost', 'api.thecloud.localhost'], Type: 'AMAZON_ISSUED', Status: 'ISSUED', KeyAlgorithm: 'EC-prime256v1', InUse: true}], NextToken: 'page-2'}
        })

        const all = await adapter.list()
        expect(all.map((certificate) => [certificate.id, certificate.name, certificate.metadata.certificateType, certificate.metadata.inUse])).toEqual([
            [ID, 'notes.thecloud.localhost', 'Amazon issued', 'Yes'],
            ['11111111-2222-3333-4444-555555555555', 'shop.test', 'Imported', 'No'],
        ])
        // Without Includes, AWS leaves EC certificates out of the list.
        expect((sent[0] as ListCertificatesCommand).input.Includes?.keyTypes).toContain('EC_prime256v1')
        expect((await adapter.list({search: 'api.thecloud'})).map((certificate) => certificate.id)).toEqual([ID])
    })

    test('describes a certificate with its users and the DNS records validation asks for', async () => {
        const {adapter, sent} = adapterWith(() => ({Certificate: detail}))

        const certificate = await adapter.get(ID)
        expect((sent[0] as DescribeCertificateCommand).input.CertificateArn).toBe(ARN)
        expect(certificate?.metadata).toMatchObject({
            inUse: 'Yes',
            inUseBy: detail.InUseBy,
            exportable: true,
            issuer: 'CN=Floci Local CA',
            notAfter: '2027-10-25T16:28:12.000Z',
            domainValidations: [{domainName: 'notes.thecloud.localhost', status: 'SUCCESS', method: 'DNS', record: {name: '_a1.notes.thecloud.localhost.', type: 'CNAME', value: '_e8.acm-validations.aws.'}}],
        })
    })

    test('a missing certificate is null, and an id that is not a UUID never reaches ACM', async () => {
        const {adapter, sent} = adapterWith(() => { throw awsError('ResourceNotFoundException') })
        expect(await adapter.get(ID)).toBeNull()
        await expect(adapter.get('../other')).rejects.toBeInstanceOf(ValidationError)
        expect(sent).toHaveLength(1)
    })

    test('requests a certificate for the domain and its extra names', async () => {
        const {adapter, sent} = adapterWith((command) => command instanceof RequestCertificateCommand ? {CertificateArn: ARN} : {Certificate: detail})

        const created = await adapter.create({values: {source: 'request', domainName: 'Notes.TheCloud.localhost', subjectAlternativeNames: 'api.thecloud.localhost\nnotes.thecloud.localhost\n*.thecloud.localhost', keyAlgorithm: 'EC_prime256v1', export: 'ENABLED'}})
        expect(created.id).toBe(ID)
        expect((sent[0] as RequestCertificateCommand).input).toEqual({
            DomainName: 'notes.thecloud.localhost',
            SubjectAlternativeNames: ['notes.thecloud.localhost', 'api.thecloud.localhost', '*.thecloud.localhost'],
            ValidationMethod: 'DNS',
            KeyAlgorithm: 'EC_prime256v1',
            Options: {Export: 'ENABLED'},
        })
    })

    test('refuses a request ACM would reject before calling it', async () => {
        const {adapter, sent} = adapterWith(() => ({}))
        await expect(adapter.create({values: {source: 'request', domainName: 'not a domain'}})).rejects.toBeInstanceOf(ValidationError)
        await expect(adapter.create({values: {source: 'request', domainName: 'a.test', subjectAlternativeNames: 'b..test'}})).rejects.toThrow('b..test is not a domain name')
        await expect(adapter.create({values: {source: 'request', domainName: 'a.test', keyAlgorithm: 'RSA_8192'}})).rejects.toBeInstanceOf(ValidationError)
        await expect(adapter.create({values: {source: 'copy', domainName: 'a.test'}})).rejects.toBeInstanceOf(ValidationError)
        expect(sent).toHaveLength(0)
    })

    test('imports PEM text as bytes, with the chain when given', async () => {
        const {adapter, sent} = adapterWith((command) => command instanceof ImportCertificateCommand ? {CertificateArn: ARN} : {Certificate: {...detail, Type: 'IMPORTED'}})
        const certificate = '-----BEGIN CERTIFICATE-----\nMIIB\n-----END CERTIFICATE-----'
        const privateKey = '-----BEGIN RSA PRIVATE KEY-----\nMIIE\n-----END RSA PRIVATE KEY-----'

        const created = await adapter.create({values: {source: 'import', certificate, privateKey, certificateChain: certificate}})
        expect(created.metadata.certificateType).toBe('Imported')
        const input = (sent[0] as ImportCertificateCommand).input
        expect(new TextDecoder().decode(input.Certificate)).toBe(certificate)
        expect(new TextDecoder().decode(input.PrivateKey)).toBe(privateKey)
        expect(input.CertificateChain).toBeDefined()

        await expect(adapter.create({values: {source: 'import', certificate, privateKey: 'secret'}})).rejects.toThrow('privateKey must be PEM text')
    })

    test('downloads, exports and revokes by the rebuilt ARN', async () => {
        const {adapter, sent} = adapterWith((command) => {
            if (command instanceof GetCertificateCommand) return {Certificate: 'CERT', CertificateChain: 'CHAIN'}
            if (command instanceof ExportCertificateCommand) return {Certificate: 'CERT', CertificateChain: 'CHAIN', PrivateKey: 'ENCRYPTED'}
            if (command instanceof RevokeCertificateCommand) return {CertificateArn: ARN}
            return {Certificate: {...detail, Status: 'REVOKED', RevocationReason: 'SUPERSEDED'}}
        })

        expect(await adapter.getCertificatePem(ID)).toEqual({certificate: 'CERT', certificateChain: 'CHAIN'})
        expect(await adapter.exportCertificate(ID, 'open-sesame')).toEqual({certificate: 'CERT', certificateChain: 'CHAIN', privateKey: 'ENCRYPTED'})
        expect(new TextDecoder().decode((sent[1] as ExportCertificateCommand).input.Passphrase)).toBe('open-sesame')
        const revoked = await adapter.revokeCertificate(ID, 'SUPERSEDED')
        expect(revoked.status).toBe('REVOKED')
        expect((sent[2] as RevokeCertificateCommand).input).toEqual({CertificateArn: ARN, RevocationReason: 'SUPERSEDED'})

        await expect(adapter.exportCertificate(ID, 'abc')).rejects.toBeInstanceOf(ValidationError)
        await expect(adapter.exportCertificate(ID, 'has$dollar')).rejects.toBeInstanceOf(ValidationError)
        await expect(adapter.revokeCertificate(ID, 'BORED' as never)).rejects.toBeInstanceOf(ValidationError)
    })

    test('deletes by ARN and lets ACM refuse a certificate that is in use', async () => {
        const {adapter, sent} = adapterWith(() => { throw awsError('ResourceInUseException') })
        await expect(adapter.delete(ID)).rejects.toThrow('ResourceInUseException')
        expect((sent[0] as DeleteCertificateCommand).input.CertificateArn).toBe(ARN)
    })
})