import type { SummarizeContext } from "../preemptive-compaction"
import { injectHookMessage } from "../../features/hook-message-injector"
import { log } from "../../shared/logger"

const SUMMARIZE_CONTEXT_PROMPT = `[COMPACTION CONTEXT INJECTION]

When summarizing this session, you MUST include the following sections in your summary:

## 1. User Requests (As-Is)
- List all original user requests exactly as they were stated
- Preserve the user's exact wording and intent

## 2. Final Goal
- What the user ultimately wanted to achieve
- The end result or deliverable expected

## 3. Work Completed
- What has been done so far
- Files created/modified
- Features implemented
- Problems solved

## 4. Remaining Tasks
- What still needs to be done
- Pending items from the original request
- Follow-up tasks identified during the work

## 5. MUST NOT Do (Critical Constraints)
- Things that were explicitly forbidden
- Approaches that failed and should not be retried
- User's explicit restrictions or preferences
- Anti-patterns identified during the session

This context is critical for maintaining continuity after compaction.
`

export function createCompactionContextInjector() {
  return async (ctx: SummarizeContext): Promise<void> => {
    log("[compaction-context-injector] injecting context", { sessionID: ctx.sessionID })

    const success = injectHookMessage(ctx.sessionID, SUMMARIZE_CONTEXT_PROMPT, {
      agent: "general",
      model: { providerID: ctx.providerID, modelID: ctx.modelID },
      path: { cwd: ctx.directory },
    })

    if (success) {
      log("[compaction-context-injector] context injected", { sessionID: ctx.sessionID })
    } else {
      log("[compaction-context-injector] injection failed", { sessionID: ctx.sessionID })
    }
  }
}