import {describe, expect, test} from 'bun:test'
import type {CloudProvider, CloudServiceDescriptor, CloudStatus} from '../cloud-spi/types'
import {runtimeDiagnostics} from './runtimeDiagnostics'

const STARTED_AT = new Date('2026-10-23T08:00:00.000Z')
const NOW = new Date('2026-10-23T10:30:15.000Z')

function descriptor(service: CloudServiceDescriptor['service'], displayName: string, availability: CloudServiceDescriptor['availability'] = 'available'): CloudServiceDescriptor {
    return {cloud: 'aws', service, displayName, availability, route: `/cloud-explorer/aws/${service}`, iconKey: service, group: 'Compute', order: 1}
}

function proxy(status: Partial<CloudStatus> = {}, descriptors: CloudServiceDescriptor[] = []) {
    return {
        status: async (cloud: CloudProvider) => ({
            cloud, adapterRegistered: true, runtime: 'reachable', endpoint: 'http://floci:4566', checkedAt: NOW.toISOString(), error: null,
            services: [{cloud, service: 'storage', adapterRegistered: true, runtime: 'reachable', endpoint: 'http://floci:4566', checkedAt: NOW.toISOString(), latencyMs: 4, error: null, errorCode: null}],
            ...status,
        }) as CloudStatus,
        services: () => descriptors,
    }
}

function runtime(responses: Record<string, unknown>): typeof fetch {
    return (async (input: string | URL | Request) => {
        const path = new URL(String(input instanceof Request ? input.url : input)).pathname
        return path in responses ? Response.json(responses[path]) : new Response('not found', {status: 404})
    }) as unknown as typeof fetch
}

const fixed = {now: () => NOW, startedAt: STARTED_AT, authMode: 'oidc' as const, activeSessions: () => 2}

describe('runtimeDiagnostics', () => {
    test('reports the runtime version, every emulated service and its console pages', async () => {
        const report = await runtimeDiagnostics('aws', proxy({}, [
            descriptor('storage', 'S3'),
            descriptor('loadbalancing', 'Load Balancers'),
            descriptor('targetgroups', 'Target Groups'),
            descriptor('scheduler', 'Scheduler', 'coming_soon'),
        ]), {
            ...fixed,
            fetch: runtime({'/_floci/health': {version: '1.9.0', edition: 'compat', services: {s3: 'running', elasticloadbalancing: 'running', route53: 'running', scheduler: 'stopped'}}}),
        })

        expect(report.runtime).toMatchObject({status: 'reachable', endpoint: 'http://floci:4566', version: '1.9.0', edition: 'compat', error: null})
        expect(report.runtime.latencyMs).toBeNumber()
        expect(report.emulatedServices).toEqual([
            {name: 'elasticloadbalancing', state: 'running', consolePages: [
                {service: 'loadbalancing', displayName: 'Load Balancers', route: '/cloud-explorer/aws/loadbalancing'},
                {service: 'targetgroups', displayName: 'Target Groups', route: '/cloud-explorer/aws/targetgroups'},
            ]},
            {name: 'route53', state: 'running', consolePages: []},
            {name: 's3', state: 'running', consolePages: [{service: 'storage', displayName: 'S3', route: '/cloud-explorer/aws/storage'}]},
            {name: 'scheduler', state: 'stopped', consolePages: []},
        ])
        expect(report.consoleServices).toHaveLength(1)
    })

    test('lists the containers the runtime started for EC2 instances', async () => {
        const report = await runtimeDiagnostics('aws', proxy(), {
            ...fixed,
            fetch: runtime({'/_floci/diagnose': {ec2: {instances: [
                {instanceId: 'i-0abc', containerStatus: 'running', sshHost: 'localhost', sshPort: 2201},
                {instanceId: 'i-0def', containerStatus: 'stopped'},
                {containerStatus: 'running'},
            ]}}}),
        })

        expect(report.containers).toEqual([
            {kind: 'ec2-instance', resourceId: 'i-0abc', status: 'running', sshHost: 'localhost', sshPort: 2201},
            {kind: 'ec2-instance', resourceId: 'i-0def', status: 'stopped', sshHost: null, sshPort: null},
        ])
    })

    test('still returns a partial report when the runtime is down', async () => {
        const report = await runtimeDiagnostics('aws', proxy({runtime: 'unavailable', error: 'Cannot reach Floci core at http://floci:4566', services: []}), {
            ...fixed,
            fetch: (async () => { throw new TypeError('fetch failed') }) as unknown as typeof fetch,
        })

        expect(report.runtime).toEqual({status: 'unavailable', endpoint: 'http://floci:4566', latencyMs: null, error: 'Cannot reach Floci core at http://floci:4566', version: null, edition: null})
        expect(report.emulatedServices).toBeNull()
        expect(report.containers).toBeNull()
    })

    test('does not query Floci core endpoints for other clouds', async () => {
        const requested: string[] = []
        const report = await runtimeDiagnostics('azure', proxy(), {
            ...fixed,
            fetch: (async (input: string | URL | Request) => { requested.push(String(input)); return Response.json({}) }) as unknown as typeof fetch,
        })

        expect(requested).toEqual([])
        expect(report.emulatedServices).toBeNull()
    })

    test('describes the console process itself', async () => {
        const report = await runtimeDiagnostics('aws', proxy(), {...fixed, fetch: runtime({})})

        expect(report.checkedAt).toBe('2026-10-23T10:30:15.000Z')
        expect(report.console).toEqual({startedAt: '2026-10-23T08:00:00.000Z', uptimeSeconds: 9015, authMode: 'oidc', activeSessions: 2})
    })
})