import type { ToolUseBlock } from '@anthropic-ai/sdk/resources/index.mjs'
import { getDefaultAppState } from '../../src/state/AppStateStore.js'
import { runTools } from '../../src/services/tools/toolOrchestration.js'
import type { CanUseToolFn } from '../../src/hooks/useCanUseTool.js'
import { enqueue, resetCommandQueue } from '../../src/utils/messageQueueManager.js'
import { processQueueIfReady } from '../../src/utils/queueProcessor.js'
import { createAssistantMessage } from '../../src/utils/messages.js'
import type { ToolUseContext } from '../../src/Tool.js'
import type { BenchmarkConfig, RunContext, Scenario, SingleExecution } from '../types.js'

async function runQueueCorrectness(
  _context: RunContext,
  config: BenchmarkConfig,
): Promise<SingleExecution[]> {
  const runs: SingleExecution[] = []
  for (let i = 0; i < config.iterations.queueCorrectness; i++) {
    resetCommandQueue()
    const executedBatches: string[][] = []
    enqueue({ value: '/help', mode: 'prompt', priority: 'next' })
    enqueue({ value: 'first normal', mode: 'prompt', priority: 'next' })
    enqueue({ value: 'second normal', mode: 'prompt', priority: 'next' })
    enqueue({ value: 'echo hi', mode: 'bash', priority: 'next' })
    const startedAt = performance.now()
    while (
      processQueueIfReady({
        executeInput: async commands => {
          executedBatches.push(commands.map(command => String(command.value)))
        },
      }).processed
    ) {
      // keep draining
    }
    const durationMs = performance.now() - startedAt
    const slashBatch = executedBatches[0] ?? []
    const normalBatch = executedBatches[1] ?? []
    const bashBatch = executedBatches[2] ?? []
    const ok =
      slashBatch.length === 1 &&
      slashBatch[0] === '/help' &&
      normalBatch.length === 2 &&
      bashBatch.length === 1
    runs.push({
      ok,
      durationMs,
      details: {
        executedBatches,
      },
      error: ok ? undefined : 'queue processor did not preserve expected batching semantics',
    })
  }
  resetCommandQueue()
  return runs
}

function createMinimalToolUseContext(): ToolUseContext {
  let appState = getDefaultAppState()
  let inProgress = new Set<string>()
  return {
    options: {
      commands: [],
      debug: false,
      mainLoopModel: 'claude-sonnet-4-5',
      tools: [],
      verbose: false,
      thinkingConfig: {
        type: 'disabled',
      },
      mcpClients: [],
      mcpResources: {},
      isNonInteractiveSession: true,
      agentDefinitions: { activeAgents: [], allAgents: [] },
    },
    abortController: new AbortController(),
    readFileState: {} as ToolUseContext['readFileState'],
    getAppState: () => appState,
    setAppState: updater => {
      appState = updater(appState)
    },
    setInProgressToolUseIDs: updater => {
      inProgress = updater(inProgress)
    },
    setResponseLength: _updater => {},
    updateFileHistoryState: _updater => {},
    updateAttributionState: _updater => {},
    messages: [],
  }
}

async function runToolPipeline(
  _context: RunContext,
  config: BenchmarkConfig,
): Promise<SingleExecution[]> {
  const runs: SingleExecution[] = []
  for (let i = 0; i < config.iterations.toolPipeline; i++) {
    const toolUseContext = createMinimalToolUseContext()
    const canUseTool: CanUseToolFn = async (_tool, input) => ({
      behavior: 'allow',
      updatedInput: input,
    })
    const toolUseMessages: ToolUseBlock[] = [
      {
        id: `tool-use-${i}-1`,
        name: 'NonExistentToolA',
        input: {},
        type: 'tool_use',
      },
      {
        id: `tool-use-${i}-2`,
        name: 'NonExistentToolB',
        input: {},
        type: 'tool_use',
      },
    ]
    const assistantMessages = toolUseMessages.map(toolUse =>
      createAssistantMessage({
        content: [toolUse],
      }),
    )
    const startedAt = performance.now()
    let yieldedMessages = 0
    for await (const update of runTools(
      toolUseMessages,
      assistantMessages,
      canUseTool,
      toolUseContext,
    )) {
      if (update.message) {
        yieldedMessages++
      }
    }
    const durationMs = performance.now() - startedAt
    const ok = yieldedMessages >= toolUseMessages.length
    runs.push({
      ok,
      durationMs,
      details: {
        yieldedMessages,
      },
      error: ok ? undefined : 'tool orchestration produced fewer messages than expected',
    })
  }
  return runs
}

export function createCorrectnessAndToolScenarios(
  config: BenchmarkConfig,
): Scenario[] {
  return [
    {
      id: 'B07',
      name: 'Slash and Queue Correctness',
      category: 'correctness',
      description:
        'Validate slash command isolation, normal prompt batching, and bash single-item behavior.',
      tags: ['queue', 'slash', 'correctness'],
      run: context => runQueueCorrectness(context, config),
    },
    {
      id: 'B08',
      name: 'Tool Pipeline Execution',
      category: 'tools',
      description:
        'Measure runTools orchestration overhead and ensure deterministic tool-result plumbing.',
      tags: ['tools', 'orchestration', 'pipeline'],
      run: context => runToolPipeline(context, config),
    },
  ]
}