import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import { mkdtempSync, rmSync, writeFileSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { pathToFileURL } from 'node:url'

const { getPathMock } = vi.hoisted(() => ({
  getPathMock: vi.fn<(name: string) => string>()
}))

vi.mock('electron', () => ({
  app: {
    getPath: getPathMock
  }
}))

import { _internals } from './hook-service'

// Execute the generated module against legacy and current plugin contracts.
describe.each(['opencode', 'opencode2'] as const)('%s plugin on OpenCode 2', (agent) => {
  type PostBody = { payload?: unknown }

  function record(value: unknown): Record<string, unknown> | undefined {
    return typeof value === 'object' && value !== null
      ? Object.fromEntries(Object.entries(value))
      : undefined
  }

  function payload(body: PostBody): Record<string, unknown> {
    return record(body.payload) ?? {}
  }

  type PluginHooks = {
    event: (input: { event: unknown }) => Promise<void>
    dispose?: () => Promise<void>
  }
  type PluginModule = {
    default?: {
      id?: unknown
      server?: (ctx: unknown) => Promise<PluginHooks>
      setup?: (ctx: unknown) => Promise<() => Promise<void>>
    }
    OrcaOpenCodeStatusPlugin?: (ctx: unknown) => Promise<PluginHooks>
  }

  // Why: the plugin resolves hook coords from the endpoint file first and only then from
  // env. Pin every input here so the run does not depend on the developer's Orca session
  // (an inherited ORCA_AGENT_HOOK_ENDPOINT would otherwise redirect the post to a live app).
  const ENV_KEYS = [
    'ORCA_PANE_KEY',
    'ORCA_OPENCODE_AGENT',
    'ORCA_AGENT_HOOK_ENDPOINT',
    'ORCA_AGENT_HOOK_PORT',
    'ORCA_AGENT_HOOK_TOKEN'
  ] as const

  let tempDir: string
  let savedFetch: typeof globalThis.fetch
  let savedEnv: Record<string, string | undefined>

  beforeEach(() => {
    tempDir = mkdtempSync(join(tmpdir(), 'orca-opencode-plugin-contract-'))
    savedFetch = globalThis.fetch
    savedEnv = {}
    for (const key of ENV_KEYS) {
      savedEnv[key] = process.env[key]
    }
    process.env.ORCA_OPENCODE_AGENT = agent
    delete process.env.ORCA_AGENT_HOOK_ENDPOINT
    process.env.ORCA_AGENT_HOOK_PORT = '59999'
    process.env.ORCA_AGENT_HOOK_TOKEN = 'test-token'
  })

  afterEach(() => {
    globalThis.fetch = savedFetch
    for (const key of ENV_KEYS) {
      if (savedEnv[key] === undefined) {
        delete process.env[key]
      } else {
        process.env[key] = savedEnv[key]
      }
    }
    rmSync(tempDir, { recursive: true, force: true })
  })

  async function loadPluginModule(
    source = _internals.getOpenCodePluginSource()
  ): Promise<PluginModule> {
    // Why: a unique basename per load defeats the ESM module cache between cases.
    const pluginPath = join(
      tempDir,
      `orca-opencode-status-${Math.random().toString(36).slice(2)}.mjs`
    )
    writeFileSync(pluginPath, source)
    // oxlint-disable-next-line typescript/consistent-type-assertions -- SAFETY: Runtime validation or the local test fixture establishes the asserted shape.
    return (await import(pathToFileURL(pluginPath).href)) as PluginModule
  }

  it('does not register hooks for the other pane variant', async () => {
    process.env.ORCA_OPENCODE_AGENT = agent === 'opencode' ? 'opencode2' : 'opencode'
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    const hook = vi.fn()
    const subscribe = vi.fn()
    const cleanup = await module.default?.setup?.({ session: { hook }, event: { subscribe } })
    expect(hook).not.toHaveBeenCalled()
    expect(subscribe).not.toHaveBeenCalled()
    await cleanup?.()
  })

  it('fails open when setup is probed without a usable context', async () => {
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    // Why: OpenCode probes setup() during startup, and the setup API shape can
    // drift between releases. A throw surfaces as a plugin failed error in the
    // TUI, so every shape must resolve to a callable cleanup instead.
    const contexts: unknown[] = [
      undefined,
      {},
      { session: {} },
      { session: { hook: vi.fn() }, event: {} }
    ]
    for (const ctx of contexts) {
      const cleanup = await module.default?.setup?.(ctx)
      expect(cleanup).toBeTypeOf('function')
      await cleanup?.()
    }
  })

  it('disposes cleanly when the prompt hook returns nothing to dispose', async () => {
    process.env.ORCA_PANE_KEY = 'tab-1:leaf-1'
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    const cleanup = await module.default?.setup?.({
      session: {
        get: async ({ sessionID }: { sessionID: string }) => ({ data: { id: sessionID } }),
        hook: async () => undefined
      },
      event: {
        subscribe: async function* () {}
      }
    })
    expect(cleanup).toBeTypeOf('function')
    await cleanup?.()
  })

  it('exposes a distinct plugin id per agent variant', async () => {
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    // Why: both plugin files share one config dir, so distinct ids keep the
    // loader from reporting a duplicate-id collision as a plugin failure.
    expect(module.default?.id).toBe(
      agent === 'opencode2' ? 'orca-opencode2-status' : 'orca-opencode-status'
    )
  })

  it('subscribes through the OpenCode 2 setup API and disposes its registrations', async () => {
    process.env.ORCA_PANE_KEY = 'tab-1:leaf-1'
    const posts: unknown[] = []
    globalThis.fetch = vi.fn(async (_input, init) => {
      posts.push(JSON.parse(String(init?.body)))
      return new Response('{}', { status: 200 })
    })
    const dispose = vi.fn()
    let subscriptionSignal: AbortSignal | undefined
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    expect(module.default?.setup).toBeTypeOf('function')
    const cleanup = await module.default?.setup?.({
      session: {
        get: async ({ sessionID }: { sessionID: string }) => ({ data: { id: sessionID } }),
        hook: async () => ({ dispose })
      },
      event: {
        subscribe: async function* ({ signal }: { signal: AbortSignal }) {
          subscriptionSignal = signal
          yield { type: 'session.created', data: { sessionID: 'ses_root' } }
          yield {
            type: 'session.execution.started',
            data: { sessionID: 'ses_root' }
          }
          yield {
            type: 'session.execution.succeeded',
            data: { sessionID: 'ses_root' }
          }
        }
      }
    })
    await vi.waitFor(() => {
      expect(posts).toEqual(
        expect.arrayContaining([
          expect.objectContaining({
            opencodeMajor: 2,
            payload: expect.objectContaining({ hook_event_name: 'SessionBusy' })
          }),
          expect.objectContaining({
            payload: expect.objectContaining({ hook_event_name: 'SessionIdle' })
          })
        ])
      )
    })
    expect(globalThis.fetch).toHaveBeenCalledWith(
      `http://127.0.0.1:59999/hook/${agent}`,
      expect.objectContaining({ method: 'POST' })
    )
    await cleanup?.()
    expect(dispose).toHaveBeenCalledOnce()
    expect(subscriptionSignal?.aborted).toBe(true)
  })

  // Why: the host's OpenCode 1 session binder must stay off OpenCode 2 posts only.
  it('declares no OpenCode major on posts from the OpenCode 1 server() entry', async () => {
    process.env.ORCA_PANE_KEY = 'tab-1:leaf-1'
    const bodies: Record<string, unknown>[] = []
    globalThis.fetch = vi.fn(async (_input, init) => {
      bodies.push(record(JSON.parse(String(init?.body))) ?? {})
      return new Response('{}', { status: 200 })
    })
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    const hooks = await module.default?.server?.({
      client: { session: { get: async () => ({ data: { id: 'ses_root' } }) } }
    })
    await hooks?.event({
      event: {
        type: 'session.status',
        properties: { sessionID: 'ses_root', status: { type: 'busy' } }
      }
    })
    await vi.waitFor(() => expect(bodies.length).toBeGreaterThan(0))
    expect(bodies.filter((body) => 'opencodeMajor' in body)).toEqual([])
    await hooks?.dispose?.()
  })

  it('maps permission, form, and text events through the live setup bridge', async () => {
    process.env.ORCA_PANE_KEY = 'tab-1:leaf-1'
    const posts: { body: PostBody }[] = []
    globalThis.fetch = vi.fn(async (_input, init) => {
      posts.push({ body: record(JSON.parse(String(init?.body))) ?? {} })
      return new Response('{}', { status: 200 })
    })
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    const cleanup = await module.default?.setup?.({
      session: {
        get: async ({ sessionID }: { sessionID: string }) => ({ data: { id: sessionID } }),
        hook: async () => ({ dispose: vi.fn() })
      },
      event: {
        subscribe: async function* () {
          yield {
            type: 'permission.asked',
            data: { id: 'perm-1', sessionID: 'ses_root', action: 'bash', resources: ['pwd'] }
          }
          yield {
            type: 'permission.replied',
            data: { id: 'perm-1', requestID: 'perm-1', sessionID: 'ses_root' }
          }
          yield {
            type: 'form.created',
            data: {
              form: {
                id: 'form-1',
                sessionID: 'ses_root',
                title: 'Pick',
                metadata: { kind: 'question', tool: { messageID: 'msg-0', id: 'tool-0' } },
                fields: [
                  {
                    title: 'Color',
                    description: 'Choose',
                    type: 'string',
                    options: [{ label: 'Red', value: 'red' }]
                  }
                ]
              }
            }
          }
          yield {
            type: 'session.text.started',
            data: { sessionID: 'ses_root', assistantMessageID: 'msg-1' }
          }
          yield {
            type: 'session.text.delta',
            data: { sessionID: 'ses_root', assistantMessageID: 'msg-1', delta: 'hello' }
          }
          yield {
            type: 'session.text.ended',
            data: { sessionID: 'ses_root', assistantMessageID: 'msg-1', text: 'hello' }
          }
          yield { type: 'form.cancelled', data: { id: 'form-1', sessionID: 'ses_root' } }
        }
      }
    })
    await vi.waitFor(() => {
      const names = posts.map(({ body }) => payload(body).hook_event_name)
      expect(names).toEqual(expect.arrayContaining(['PermissionRequest', 'MessagePart']))
    })
    await vi.waitFor(() => {
      const names = posts.map(({ body }) => payload(body).hook_event_name)
      expect(names).toContain('AskUserQuestion')
      expect(posts).toEqual(
        expect.arrayContaining([
          expect.objectContaining({
            body: expect.objectContaining({
              payload: expect.objectContaining({
                hook_event_name: 'AskUserQuestion',
                sessionID: 'ses_root'
              })
            })
          })
        ])
      )
    })
    await vi.waitFor(() => {
      const names = posts.map(({ body }) => payload(body).hook_event_name)
      expect(names.at(-1)).toBe('SessionIdle')
    })
    await cleanup?.()
  })

  // Why: OpenCode 2 raises one form primitive for several producers, and its owner
  // id — not its metadata — decides whether Orca can ever retire the blocker
  // (v2.0.12 capture in docs/bug-reproductions/opencode2-form-created-kinds).
  async function runSetupBridge(
    events: { type: string; data: Record<string, unknown> }[]
  ): Promise<{ names: string[]; cleanup?: () => Promise<void> }> {
    process.env.ORCA_PANE_KEY = 'tab-1:leaf-1'
    const names: string[] = []
    globalThis.fetch = vi.fn(async (_input, init) => {
      names.push(String(payload(record(JSON.parse(String(init?.body))) ?? {}).hook_event_name))
      return new Response('{}', { status: 200 })
    })
    const module = await loadPluginModule(
      agent === 'opencode2'
        ? _internals.getOpenCode2PluginSource()
        : _internals.getOpenCodePluginSource()
    )
    const cleanup = await module.default?.setup?.({
      session: {
        get: async ({ sessionID }: { sessionID: string }) => ({ data: { id: sessionID } }),
        hook: async () => ({ dispose: vi.fn() })
      },
      event: {
        subscribe: async function* () {
          for (const event of events) {
            yield event
          }
        }
      }
    })
    return { names, cleanup }
  }

  function questionForm(id: string): Record<string, unknown> {
    return {
      id,
      sessionID: 'ses_root',
      title: 'Questions',
      metadata: { kind: 'question', tool: { messageID: 'msg-0', id: 'tool-0' } },
      fields: [{ key: 'q0', title: 'Proceed?', type: 'string', options: [] }]
    }
  }

  it('ignores a form owned by the non-session elicitation sentinel', async () => {
    const { names, cleanup } = await runSetupBridge([
      { type: 'session.execution.started', data: { sessionID: 'ses_root' } },
      {
        type: 'form.created',
        data: {
          form: {
            id: 'form-mcp',
            sessionID: 'global',
            title: 'server is requesting input',
            metadata: { kind: 'mcp-elicitation', server: 'server' },
            fields: [{ key: 'elicitation', title: 'Input', type: 'string', options: [] }]
          }
        }
      },
      { type: 'form.cancelled', data: { id: 'form-mcp', sessionID: 'global' } },
      { type: 'session.execution.succeeded', data: { sessionID: 'ses_root' } }
    ])
    await vi.waitFor(() => {
      expect(names.at(-1)).toBe('SessionIdle')
    })
    expect(names).not.toContain('AskUserQuestion')
    await cleanup?.()
  })

  // Why: metadata is optional in OpenCode's schema and its kind is a convention,
  // so any session-owned form must block rather than silently disappear.
  it.each([
    ['no metadata at all', undefined],
    ['metadata without a kind', { server: 'server' }],
    ['an unrecognised kind', { kind: 'some.future.kind' }],
    ['the web search provider picker', { kind: 'websearch.provider' }]
  ])('blocks the pane on a session-owned form with %s', async (_label, metadata) => {
    const { names, cleanup } = await runSetupBridge([
      { type: 'session.execution.started', data: { sessionID: 'ses_root' } },
      {
        type: 'form.created',
        data: {
          form: {
            id: 'form-unknown',
            sessionID: 'ses_root',
            title: 'Choose a web search provider',
            ...(metadata === undefined ? {} : { metadata }),
            fields: [{ key: 'provider', title: 'Provider', type: 'string', options: [] }]
          }
        }
      }
    ])
    await vi.waitFor(() => {
      expect(names).toContain('AskUserQuestion')
    })
    expect(names.at(-1)).toBe('AskUserQuestion')
    await cleanup?.()
  })

  it.each(['form.replied', 'form.cancelled'])(
    'retires an admitted unknown-kind blocker on %s',
    async (resolution) => {
      const { names, cleanup } = await runSetupBridge([
        { type: 'session.execution.started', data: { sessionID: 'ses_root' } },
        {
          type: 'form.created',
          data: {
            form: {
              id: 'form-unknown',
              sessionID: 'ses_root',
              title: 'Web Search',
              fields: [{ key: 'choice', title: 'Allow?', type: 'string', options: [] }]
            }
          }
        },
        { type: resolution, data: { id: 'form-unknown', sessionID: 'ses_root' } },
        { type: 'session.execution.succeeded', data: { sessionID: 'ses_root' } }
      ])
      await vi.waitFor(() => {
        expect(names).toContain('AskUserQuestion')
        expect(names.at(-1)).toBe('SessionIdle')
      })
      await cleanup?.()
    }
  )

  it('still blocks on a real question form and retires it on reply', async () => {
    const { names, cleanup } = await runSetupBridge([
      { type: 'session.execution.started', data: { sessionID: 'ses_root' } },
      { type: 'form.created', data: { form: questionForm('form-q') } },
      {
        type: 'form.replied',
        data: { id: 'form-q', sessionID: 'ses_root', answer: { q0: 'Yes' } }
      },
      { type: 'session.execution.succeeded', data: { sessionID: 'ses_root' } }
    ])
    await vi.waitFor(() => {
      expect(names).toContain('AskUserQuestion')
      expect(names.at(-1)).toBe('SessionIdle')
    })
    await cleanup?.()
  })

  it('keeps a live question blocker while an ignored form is raised and resolved', async () => {
    const { names, cleanup } = await runSetupBridge([
      { type: 'session.execution.started', data: { sessionID: 'ses_root' } },
      { type: 'form.created', data: { form: questionForm('form-q') } },
      {
        type: 'form.created',
        data: {
          form: {
            id: 'form-mcp',
            sessionID: 'global',
            title: 'server is requesting input',
            metadata: { kind: 'mcp-elicitation', server: 'server' },
            fields: [{ key: 'elicitation', title: 'Input', type: 'string', options: [] }]
          }
        }
      },
      { type: 'form.cancelled', data: { id: 'form-mcp', sessionID: 'global' } }
    ])
    await vi.waitFor(() => {
      expect(names).toContain('AskUserQuestion')
    })
    expect(names.at(-1)).toBe('AskUserQuestion')
    await cleanup?.()
  })

  it.each(['waiting', 'idle', 'disposed'])(
    'drops an admitted prompt overtaken by %s',
    async (transition) => {
      process.env.ORCA_PANE_KEY = 'tab-1:leaf-1'
      const posts: unknown[] = []
      globalThis.fetch = vi.fn(async (_input, init) => {
        posts.push(JSON.parse(String(init?.body)))
        return new Response('{}', { status: 200 })
      })
      let releaseLookup: (value: { data: { id: string } }) => void = () => {}
      const lookup = new Promise<{ data: { id: string } }>((resolve) => {
        releaseLookup = resolve
      })
      const module = await loadPluginModule(
        agent === 'opencode2'
          ? _internals.getOpenCode2PluginSource()
          : _internals.getOpenCodePluginSource()
      )
      const hooks = await module.default?.server?.({ client: { session: { get: () => lookup } } })
      expect(hooks).toBeDefined()
      const prompt = hooks?.event({
        event: {
          type: 'session.next.prompt.admitted',
          properties: {
            sessionID: 'ses_root',
            messageID: 'msg_user',
            prompt: { text: 'stale prompt' }
          }
        }
      })
      if (transition === 'disposed') {
        await hooks?.dispose?.()
      } else {
        // Seed ancestry while the earlier prompt lookup remains suspended.
        await hooks?.event({
          event: { type: 'session.created', properties: { info: { id: 'ses_root' } } }
        })
        await hooks?.event({
          event:
            transition === 'waiting'
              ? {
                  type: 'permission.asked',
                  properties: {
                    id: 'perm_1',
                    sessionID: 'ses_root',
                    permission: 'bash',
                    patterns: ['sleep 25']
                  }
                }
              : { type: 'session.idle', properties: { sessionID: 'ses_root' } }
        })
      }
      releaseLookup({ data: { id: 'ses_root' } })
      await prompt
      expect(posts).not.toContainEqual(
        expect.objectContaining({ payload: expect.objectContaining({ role: 'user' }) })
      )
      await hooks?.dispose?.()
    }
  )
})