package hostexec

import (
	"github.com/carlosframework/platform/internal/hostclaim"
	"slices"
)

func PreinstallationParticipant(c *hostclaim.Claim, box, enrollment string) error {
	if c == nil || c.Holder == nil || c.Validate() != nil || box == "" || enrollment == "" || slices.Contains(c.Lost, box) {
		return ErrInactive
	}
	if c.Op.Kind == hostclaim.KindServing {
		if c.Op.Exec != box || (c.Holder.WriterBox != box && (c.Holder.WriterBox != "" || c.Holder.Session != 0)) {
			return ErrInactive
		}
		return nil
	}
	if c.Op.Kind == hostclaim.KindCreating {
		if c.Op.Phase != "" || c.Op.ID == "" || c.Op.Exec != "" || c.Holder.Stamp != 0 || c.Holder.Session != 0 || c.Holder.WriterBox != "" || len(c.Op.Participants) != 1 || c.Op.Participants[0] != box || c.Op.Intent["selected_executor"] != box || c.Op.Intent["executor_enrollment"] != enrollment {
			return ErrInactive
		}
		return nil
	}
	if !slices.Contains(c.Op.Participants, box) || c.Op.ID == "" || c.Holder.Family != "instance" {
		return ErrInactive
	}
	target := c.Op.Intent["target"]
	if c.Op.Kind == hostclaim.KindRelocating {
		target = c.Op.Intent["target_box"]
	}
	if target != box || (c.Op.Intent["target_enrollment"] != "" && c.Op.Intent["target_enrollment"] != enrollment) {
		return ErrInactive
	}
	switch c.Op.Kind {
	case hostclaim.KindRelocating:
		switch c.Op.Phase {
		case hostclaim.PhaseStarting, hostclaim.PhaseReleasing, hostclaim.PhasePinning:
			return nil
		case hostclaim.PhaseInstalling, hostclaim.PhaseInstalled:
			if c.Op.Exec == box && c.Op.Journal["local_install"] == "" {
				return nil
			}
		}
	case hostclaim.KindMoving:
		if c.Op.Phase == hostclaim.PhaseMoving || c.Op.Phase == hostclaim.PhaseSealed {
			return nil
		}
	case hostclaim.KindLanding:
		if c.Op.Phase == "checking" && c.Op.Exec == box {
			return nil
		}
	}
	return ErrInactive
}