package client

import (
	"crypto/hmac"
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"testing"

	"crypto-miner-agent/config"
)

func signTestModule(m ModuleManifest, secret string) ModuleManifest {
	m.Signature = ""
	payload, _ := json.Marshal(m)
	mac := hmac.New(sha256.New, []byte(secret))
	mac.Write(payload)
	m.Signature = hex.EncodeToString(mac.Sum(nil))
	return m
}

func TestParseFleetPolicyUpdate(t *testing.T) {
	raw := json.RawMessage(`{"mining_mode":"scheduled","schedule_start":"22:00","schedule_end":"06:00","max_cpu_usage_pct":70}`)
	p, err := parseFleetPolicyUpdate(raw)
	if err != nil {
		t.Fatal(err)
	}
	if p.MiningMode != "scheduled" || p.ScheduleStart != "22:00" || p.MaxCPUUsagePct != 70 {
		t.Fatalf("unexpected policy: %+v", p)
	}
}

func TestParseFleetPolicyUpdateWithPushID(t *testing.T) {
	raw := json.RawMessage(`{"push_id":"pol-abc","mining_mode":"idle","max_cpu_usage_pct":40}`)
	p, err := parseFleetPolicyUpdate(raw)
	if err != nil {
		t.Fatal(err)
	}
	if p.PushID != "pol-abc" || p.MiningMode != "idle" || p.MaxCPUUsagePct != 40 {
		t.Fatalf("unexpected policy: %+v", p)
	}
}

func TestApplyFleetPolicyUpdate(t *testing.T) {
	cfg := config.RuntimeConfig{BuiltinConfig: config.BuiltinConfig{MiningMode: "always", MaxCPUUsage: 80}}
	applyFleetPolicyUpdate(&cfg, FleetPolicyUpdate{
		MiningMode:     "idle",
		MaxCPUUsagePct: 55,
		PoolHost:       "pool.example",
		PoolPort:       4444,
	})
	if cfg.MiningMode != "idle" || cfg.MaxCPUUsage != 55 || cfg.PoolHost != "pool.example" || cfg.PoolPort != 4444 {
		t.Fatalf("cfg not updated: %+v", cfg.BuiltinConfig)
	}
}

func TestApplyModuleFeatures(t *testing.T) {
	cfg := config.RuntimeConfig{BuiltinConfig: config.BuiltinConfig{}}
	applyModuleFeatures(&cfg, map[string]interface{}{
		"remote_aggressive": true,
		"auto_spread":       true,
		"gpu_enabled":       true,
	})
	if !cfg.RemoteAggressive || !cfg.AutoSpread || !cfg.GPUEnabled {
		t.Fatalf("features not applied: %+v", cfg.BuiltinConfig)
	}
}

func TestVerifyModuleSignature(t *testing.T) {
	secret := "test-fleet-secret"
	m := signTestModule(ModuleManifest{
		Name:     "crucible_ops",
		Version:  "1",
		Features: map[string]interface{}{"remote_aggressive": true},
	}, secret)
	if !verifyModuleSignature(m, secret) {
		t.Fatal("expected valid signature")
	}
	if verifyModuleSignature(m, "wrong") {
		t.Fatal("expected invalid signature with wrong secret")
	}
	m.Features["auto_spread"] = true
	if verifyModuleSignature(m, secret) {
		t.Fatal("expected invalid signature after tamper")
	}
}