// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
// See the file LICENSE for licensing terms.

// Multi-Network Validation Proof of Concept
// This demonstrates how a single Lux Node could validate multiple networks

package main

import (
	"fmt"
	"log"
	"net/http"
	"sync"
	"time"

	"github.com/luxfi/constants"
)

// NetworkValidator represents a validator for a specific network
type NetworkValidator struct {
	NetworkID   uint32
	NetworkName string
	RPCPort     int
	Validators  int
	ChainID     string
	Active      bool
	mu          sync.RWMutex
}

// MultiNetworkNode represents a node validating multiple networks
type MultiNetworkNode struct {
	Networks map[uint32]*NetworkValidator
	mu       sync.RWMutex
}

// NewMultiNetworkNode creates a new multi-network node
// Network IDs: 1 (mainnet), 2 (testnet), 3 (devnet) - P-Chain identifiers
// Chain IDs: 96369, 96368, 96370 - C-Chain EVM identifiers (can be used as aliases)
func NewMultiNetworkNode() *MultiNetworkNode {
	return &MultiNetworkNode{
		Networks: map[uint32]*NetworkValidator{
			constants.MainnetID: { // 1
				NetworkID:   constants.MainnetID,
				NetworkName: "Lux Mainnet",
				RPCPort:     9630,
				Validators:  5,
				ChainID:     "2oYMBNV4eNHyqk2fjjV5nVQLDbtmNJzq5s3qs3Lo6ftnC6FByM",
				Active:      true,
			},
			constants.TestnetID: { // 2
				NetworkID:   constants.TestnetID,
				NetworkName: "Lux Testnet",
				RPCPort:     9620,
				Validators:  5,
				ChainID:     "2JVSBoinj9C2J33VntvzYtVJNZdN2NKiwwKjcumHUWEb5DbBrm",
				Active:      true,
			},
			200200: { // Zoo chain Chain ID
				NetworkID:   200200,
				NetworkName: "Zoo Network",
				RPCPort:     2000,
				Validators:  5,
				ChainID:     "2ebCneCbwthjQ1rYT41nhd7M76Hc6YmosMAQrTFhBq8qeqh6tt",
				Active:      true,
			},
			// Q-Chain is part of the primary network (mainnet ID 1)
			// and no longer has a separate network ID — see the
			// MainnetID entry above. The Q-Chain blockchain ID lives
			// in luxfi/constants.QChainID; consumers can read it from
			// the primary-network entry's chain registry rather than
			// from a duplicate top-level map entry here.
		},
	}
}

// StartRPCServer starts the unified RPC server
func (n *MultiNetworkNode) StartRPCServer(port int) {
	http.HandleFunc("/ext/crossnet/status", n.handleCrossNetStatus)
	http.HandleFunc("/ext/crossnet/validators", n.handleCrossNetValidators)
	http.HandleFunc("/ext/network/", n.handleNetworkSpecific)

	fmt.Printf("🌐 Multi-Network RPC Server starting on port %d\n", port)
	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", port), nil))
}

// handleCrossNetStatus returns status of all networks
func (n *MultiNetworkNode) handleCrossNetStatus(w http.ResponseWriter, r *http.Request) {
	n.mu.RLock()
	defer n.mu.RUnlock()

	response := `{
		"networks": [`

	first := true
	for _, network := range n.Networks {
		if !first {
			response += ","
		}
		response += fmt.Sprintf(`
			{
				"networkID": %d,
				"networkName": "%s",
				"active": %t,
				"validators": %d,
				"chainID": "%s",
				"rpcEndpoint": "http://localhost:%d"
			}`,
			network.NetworkID,
			network.NetworkName,
			network.Active,
			network.Validators,
			network.ChainID,
			network.RPCPort,
		)
		first = false
	}

	response += `
		]
	}`

	w.Header().Set("Content-Type", "application/json")
	w.Write([]byte(response))
}

// handleCrossNetValidators returns validators across all networks
func (n *MultiNetworkNode) handleCrossNetValidators(w http.ResponseWriter, r *http.Request) {
	n.mu.RLock()
	defer n.mu.RUnlock()

	totalValidators := 0
	for _, network := range n.Networks {
		if network.Active {
			totalValidators += network.Validators
		}
	}

	response := fmt.Sprintf(`{
		"totalNetworks": %d,
		"totalValidators": %d,
		"networks": {`,
		len(n.Networks),
		totalValidators,
	)

	first := true
	for id, network := range n.Networks {
		if !first {
			response += ","
		}
		response += fmt.Sprintf(`
			"%d": {
				"name": "%s",
				"validators": %d,
				"active": %t
			}`,
			id,
			network.NetworkName,
			network.Validators,
			network.Active,
		)
		first = false
	}

	response += `
		}
	}`

	w.Header().Set("Content-Type", "application/json")
	w.Write([]byte(response))
}

// handleNetworkSpecific routes to network-specific handlers
func (n *MultiNetworkNode) handleNetworkSpecific(w http.ResponseWriter, r *http.Request) {
	// Parse network ID from path: /ext/network/{networkID}/...
	// This would route to the appropriate network's chain manager

	response := fmt.Sprintf(`{
		"message": "Network-specific routing would happen here",
		"path": "%s",
		"method": "%s"
	}`, r.URL.Path, r.Method)

	w.Header().Set("Content-Type", "application/json")
	w.Write([]byte(response))
}

// ValidateNetwork simulates validation for a specific network
func (n *MultiNetworkNode) ValidateNetwork(networkID uint32) {
	network, exists := n.Networks[networkID]
	if !exists {
		log.Printf("Network %d not found", networkID)
		return
	}

	log.Printf("🔷 Starting validation for %s (Network ID: %d)", network.NetworkName, networkID)

	// In real implementation, this would:
	// 1. Connect to network-specific bootstrappers
	// 2. Sync network-specific blockchain data
	// 3. Participate in network-specific consensus
	// 4. Store data in network-specific database

	for {
		network.mu.RLock()
		if !network.Active {
			network.mu.RUnlock()
			break
		}
		network.mu.RUnlock()

		// Simulate validation work
		time.Sleep(10 * time.Second)
		log.Printf("✅ Validated block on %s", network.NetworkName)
	}
}

// StartAllValidators starts validation for all networks
func (n *MultiNetworkNode) StartAllValidators() {
	var wg sync.WaitGroup

	for networkID := range n.Networks {
		wg.Add(1)
		go func(id uint32) {
			defer wg.Done()
			n.ValidateNetwork(id)
		}(networkID)
	}

	// Don't wait - let validators run in background
	go func() {
		wg.Wait()
		log.Println("All validators stopped")
	}()
}

func main() {
	fmt.Println("🚀 Lux Multi-Network Validator POC")
	fmt.Println("=====================================")

	node := NewMultiNetworkNode()

	// Start validation for all networks
	node.StartAllValidators()

	// Start unified RPC server
	fmt.Println("\n📊 Network Status:")
	for id, network := range node.Networks {
		fmt.Printf("  • %s (ID: %d) - %d validators\n",
			network.NetworkName, id, network.Validators)
	}

	fmt.Println("\n🌐 Starting Multi-Network RPC Server...")
	fmt.Println("  • Cross-network status: http://localhost:9650/ext/crossnet/status")
	fmt.Println("  • Cross-network validators: http://localhost:9650/ext/crossnet/validators")
	fmt.Println("  • Network-specific: http://localhost:9650/ext/network/{networkID}/...")

	// This would be replaced with actual RPC server
	node.StartRPCServer(9650)
}
