package engine

import (
	"encoding/json"

	"git.yuntuo.hk/k2safe/orbit/weave/definition"
)

// PollOutcome 仅分类一次成功查询的业务结果，不代表查询请求的Pulse执行状态。
type PollOutcome string

const (
	PollPending     PollOutcome = "PENDING"
	PollSucceeded   PollOutcome = "SUCCEEDED"
	PollFailed      PollOutcome = "FAILED"
	PollNeedsReview PollOutcome = "NEEDS_REVIEW"
)

// ClassifyPoll 解释固定定义中的结果映射；轮次/时限/信号竞态仍由持久化运行器决定。
func (p *Program) ClassifyPoll(key string, raw json.RawMessage) (PollOutcome, error) {
	node, ok := p.nodes[key]
	if !ok || node.Poll == nil {
		return "", problem(key, "NOT_A_POLL_STEP")
	}
	result, err := classifyPoll(*node.Poll, raw)
	if err != nil {
		return "", problem(key, "POLL_RESULT_INVALID")
	}
	return result, nil
}
func classifyPoll(p definition.Poll, raw json.RawMessage) (PollOutcome, error) {
	if err := definition.ValidateData(p.Task.ResultType, raw); err != nil {
		return "", err
	}
	status, err := resolve(definition.Value{Kind: "REFERENCE", Reference: &definition.Reference{Source: "result", Path: p.StatusPath}}, definition.Type{Kind: "STRING"}, values{"result": raw})
	if err != nil {
		return "", err
	}
	var value string
	if err := json.Unmarshal(status, &value); err != nil {
		return "", err
	}
	for _, group := range []struct {
		values  []string
		outcome PollOutcome
	}{{p.Pending, PollPending}, {p.Succeeded, PollSucceeded}, {p.Failed, PollFailed}, {p.Review, PollNeedsReview}} {
		for _, candidate := range group.values {
			if value == candidate {
				return group.outcome, nil
			}
		}
	}
	return "", problem("", "UNMAPPED_POLL_RESULT")
}