import type { PluginContext } from "./types"
import type { BackgroundManager } from "../features/background-agent"

import { getMainSessionID } from "../features/claude-code-session-state"
import { clearBoulderState } from "../features/boulder-state"
import { log } from "../shared"
import { resolveSessionAgent } from "./session-agent-resolver"
import { parseRalphLoopArguments } from "../hooks/ralph-loop/command-arguments"
import { getAgentConfigKey } from "../shared/agent-display-names"

import type { CreatedHooks } from "../create-hooks"
import { COUNCIL_MEMBER_KEY_PREFIX } from "../agents/builtin-agents/council-member-agents"

export function createToolExecuteBeforeHandler(args: {
  ctx: PluginContext
  hooks: CreatedHooks
  backgroundManager?: Pick<BackgroundManager, "getTasksByParentSession">
}): (
  input: { tool: string; sessionID: string; callID: string },
  output: { args: Record<string, unknown> },
) => Promise<void> {
  const { ctx, hooks, backgroundManager } = args

  function hasPendingCouncilMembers(sessionID: string): boolean {
    if (!backgroundManager) {
      return false
    }

    const tasks = backgroundManager.getTasksByParentSession(sessionID)
    return tasks.some((task) =>
      (task.agent === "council-member" || task.agent.startsWith(COUNCIL_MEMBER_KEY_PREFIX)) &&
      (task.status === "pending" || task.status === "running")
    )
  }

  return async (input, output): Promise<void> => {
    const toolNameLower = input.tool?.toLowerCase()

    if (toolNameLower === "question" || toolNameLower === "askuserquestion" || toolNameLower === "ask_user_question" || toolNameLower === "switch_agent") {
      const sessionAgent = await resolveSessionAgent(ctx.client, input.sessionID)
      const sessionAgentKey = sessionAgent ? getAgentConfigKey(sessionAgent) : undefined

      if (sessionAgentKey === "athena" && hasPendingCouncilMembers(input.sessionID)) {
        throw new Error(
          "Council members are still running. Wait for all launched members to finish and collect their outputs before asking next-step questions or switching agents."
        )
      }
    }

    await hooks.writeExistingFileGuard?.["tool.execute.before"]?.(input, output)
    await hooks.questionLabelTruncator?.["tool.execute.before"]?.(input, output)
    await hooks.claudeCodeHooks?.["tool.execute.before"]?.(input, output)
    await hooks.nonInteractiveEnv?.["tool.execute.before"]?.(input, output)
    await hooks.commentChecker?.["tool.execute.before"]?.(input, output)
    await hooks.directoryAgentsInjector?.["tool.execute.before"]?.(input, output)
    await hooks.directoryReadmeInjector?.["tool.execute.before"]?.(input, output)
    await hooks.rulesInjector?.["tool.execute.before"]?.(input, output)
    await hooks.tasksTodowriteDisabler?.["tool.execute.before"]?.(input, output)
    await hooks.prometheusMdOnly?.["tool.execute.before"]?.(input, output)
    await hooks.sisyphusJuniorNotepad?.["tool.execute.before"]?.(input, output)
    await hooks.atlasHook?.["tool.execute.before"]?.(input, output)

    const normalizedToolName = input.tool.toLowerCase()
    if (
      normalizedToolName === "question"
      || normalizedToolName === "ask_user_question"
      || normalizedToolName === "askuserquestion"
    ) {
      const sessionID = input.sessionID || getMainSessionID()
      await hooks.sessionNotification?.({
        event: {
          type: "tool.execute.before",
          properties: {
            sessionID,
            tool: input.tool,
            args: output.args,
          },
        },
      })
    }

    if (input.tool === "task") {
      const argsObject = output.args
      const category = typeof argsObject.category === "string" ? argsObject.category : undefined
      const subagentType = typeof argsObject.subagent_type === "string" ? argsObject.subagent_type : undefined
      const sessionId = typeof argsObject.session_id === "string" ? argsObject.session_id : undefined

      if (category) {
        argsObject.subagent_type = "sisyphus-junior"
      } else if (!subagentType && sessionId) {
        const resolvedAgent = await resolveSessionAgent(ctx.client, sessionId)
        argsObject.subagent_type = resolvedAgent ?? "continue"
      }
    }

    if (hooks.ralphLoop && input.tool === "skill") {
      const rawName = typeof output.args.name === "string" ? output.args.name : undefined
      const command = rawName?.replace(/^\//, "").toLowerCase()
      const sessionID = input.sessionID || getMainSessionID()

      if (command === "ralph-loop" && sessionID) {
        const rawArgs = rawName?.replace(/^\/?(ralph-loop)\s*/i, "") || ""
        const parsedArguments = parseRalphLoopArguments(rawArgs)

        hooks.ralphLoop.startLoop(sessionID, parsedArguments.prompt, {
          maxIterations: parsedArguments.maxIterations,
          completionPromise: parsedArguments.completionPromise,
          strategy: parsedArguments.strategy,
        })
      } else if (command === "cancel-ralph" && sessionID) {
        hooks.ralphLoop.cancelLoop(sessionID)
      } else if (command === "ulw-loop" && sessionID) {
        const rawArgs = rawName?.replace(/^\/?(ulw-loop)\s*/i, "") || ""
        const parsedArguments = parseRalphLoopArguments(rawArgs)

        hooks.ralphLoop.startLoop(sessionID, parsedArguments.prompt, {
          ultrawork: true,
          maxIterations: parsedArguments.maxIterations,
          completionPromise: parsedArguments.completionPromise,
          strategy: parsedArguments.strategy,
        })
      }
    }

    if (input.tool === "skill") {
      const rawName = typeof output.args.name === "string" ? output.args.name : undefined
      const command = rawName?.replace(/^\//, "").toLowerCase()
      const sessionID = input.sessionID || getMainSessionID()

      if (command === "stop-continuation" && sessionID) {
        hooks.stopContinuationGuard?.stop(sessionID)
        hooks.todoContinuationEnforcer?.cancelAllCountdowns()
        hooks.ralphLoop?.cancelLoop(sessionID)
        clearBoulderState(ctx.directory)
        log("[stop-continuation] All continuation mechanisms stopped", {
          sessionID,
        })
      }
    }
  }
}