package state

import (
	"fmt"
	"strings"
	"time"
)

// ParseIntentOutput parses `ananke intent` CLI output from local/remote commands.
func ParseIntentOutput(raw string) (Intent, error) {
	for _, line := range strings.Split(raw, "\n") {
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}
		idx := strings.Index(line, "intent=")
		if idx < 0 {
			continue
		}
		payload := strings.TrimSpace(line[idx:])
		fields := strings.Fields(payload)
		if len(fields) == 0 || !strings.HasPrefix(fields[0], "intent=") {
			continue
		}
		stateValue := strings.TrimSpace(strings.TrimPrefix(fields[0], "intent="))
		if stateValue == "" || stateValue == "none" {
			return Intent{}, nil
		}
		in := Intent{State: stateValue}
		if strings.Contains(payload, `reason="`) {
			parts := strings.SplitN(payload, `reason="`, 2)
			if len(parts) == 2 {
				if end := strings.Index(parts[1], `"`); end >= 0 {
					in.Reason = parts[1][:end]
				}
			}
		}
		for _, field := range fields[1:] {
			if strings.HasPrefix(field, "source=") {
				in.Source = strings.TrimSpace(strings.TrimPrefix(field, "source="))
			}
			if strings.HasPrefix(field, "updated_at=") {
				ts := strings.TrimSpace(strings.TrimPrefix(field, "updated_at="))
				if ts != "" {
					parsed, err := time.Parse(time.RFC3339, ts)
					if err != nil {
						return Intent{}, fmt.Errorf("parse updated_at %q: %w", ts, err)
					}
					in.UpdatedAt = parsed
				}
			}
		}
		return in, nil
	}
	return Intent{}, fmt.Errorf("intent output missing intent= token")
}