package ui

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"

	"github.com/Pingu-Studio/MaidnCLI/internal/config"
)

func RunBootstrapWizard() (config.Config, error) {
	reader := bufio.NewReader(os.Stdin)
	cfg := config.Config{}

	cfg.WorkspaceDir = prompt(reader, "Workspace directory", ".\\maidn-workspace")
	cfg.GitHub.Org = prompt(reader, "GitHub organization", "Pingu-Studio")
	cfg.Flux.Owner = cfg.GitHub.Org
	cfg.Flux.RepoName = prompt(reader, "Flux repo name", "mcast-maidn-cd-cluster")
	cfg.Flux.Branch = prompt(reader, "Flux branch", "main")
	cfg.Flux.ClusterPath = prompt(reader, "Flux cluster path", "./clusters/maidn-cd-0")
	cfg.Flux.ClusterDomain = prompt(reader, "Flux cluster domain", "dev01.nid3.com")

	cfg.Talos.RepoURL = prompt(reader, "Talos IaC repo URL", "https://github.com/Pingu-Studio/maidn-talos-proxmox.git")
	cfg.Talos.RepoRef = prompt(reader, "Talos IaC repo ref", "main")
	cfg.Talos.RepoDirName = prompt(reader, "Talos IaC checkout directory", "maidn-talos-proxmox")
	cfg.Talos.TerraformDir = prompt(reader, "Terraform subdirectory", "terraform")
	cfg.Talos.GeneratedDir = prompt(reader, "Generated subdirectory", "generated")
	cfg.Talos.ConfigFileName = prompt(reader, "Terraform config filename", "terraform.tfvars")
	cfg.Talos.AutoRunTerraform = promptBool(reader, "Run terraform automatically", true)
	cfg.Talos.AutoBootstrap = promptBool(reader, "Run talos bootstrap automatically", true)
	cfg.Talos.AutoBootstrapFlux = promptBool(reader, "Run flux bootstrap automatically", true)

	cfg.Talos.Proxmox.APIURL = prompt(reader, "Proxmox API URL", "https://192.168.0.9:8006/api2/json")
	cfg.Talos.Proxmox.APIToken = prompt(reader, "Proxmox API token", "")
	cfg.Talos.Proxmox.DefaultNode = prompt(reader, "Default Proxmox node", "pingu4")
	cfg.Talos.Proxmox.Pool = prompt(reader, "Proxmox pool", "")
	cfg.Talos.Proxmox.NodeInterfaces = promptMap(reader, "Node interfaces map (node=iface,comma separated)", map[string]string{"pingu4": "enp6s0"})

	cfg.Talos.Cluster.Name = prompt(reader, "Talos cluster name", "proxmox-talos-dev01-cluster")
	cfg.Talos.Cluster.Domain = prompt(reader, "Talos cluster domain", "dev01.nid3.com")
	cfg.Talos.Cluster.ControlPlaneVIP = prompt(reader, "Control plane VIP", "192.168.43.7")
	cfg.Talos.Cluster.CNI = prompt(reader, "CNI", "flannel")
	cfg.Talos.Cluster.DNSServers = promptList(reader, "DNS servers (comma separated)", []string{"192.168.0.222", "1.1.1.1"})
	cfg.Talos.Cluster.DiskStorage = prompt(reader, "Primary disk storage", "local-lvm")
	cfg.Talos.Cluster.AdditionalStorage = prompt(reader, "Additional disk storage", "local-lvm")
	cfg.Talos.Cluster.CreateVLANInterface = promptBool(reader, "Create VLAN interfaces", true)

	cfg.Talos.Image.FactorySchematicID = prompt(reader, "Talos factory schematic ID", "ddf38e55e30aa9b2bb0b765054ed63444dc00244ab8bb4ad4ad92486602285f8")
	cfg.Talos.Image.TalosVersion = prompt(reader, "Talos version", "v1.11.1")
	cfg.Talos.Image.TalosISOFile = prompt(reader, "Talos ISO file", "local:iso/talos-1.11.1.iso")
	cfg.Talos.Image.UpdateMode = prompt(reader, "Talos image update mode (manual/download)", "manual")
	cfg.Talos.Image.Storage = prompt(reader, "Talos image storage", "local")
	cfg.Talos.Image.Architecture = prompt(reader, "Talos image architecture", "amd64")

	cfg.Talos.Nodes = promptNodes(reader, cfg.Talos.Proxmox.DefaultNode)
	if len(cfg.Talos.Nodes) > 0 {
		cfg.Talos.BootstrapNode = prompt(reader, "Talos bootstrap node IP", cfg.Talos.Nodes[0].Networks[0].IP)
		cfg.Talos.KubeconfigNode = prompt(reader, "Talos kubeconfig node IP", cfg.Talos.Nodes[0].Networks[0].IP)
	}

	return cfg, nil
}

func prompt(reader *bufio.Reader, label, fallback string) string {
	if fallback != "" {
		fmt.Printf("%s [%s]: ", label, fallback)
	} else {
		fmt.Printf("%s: ", label)
	}
	value, _ := reader.ReadString('\n')
	value = strings.TrimSpace(value)
	if value == "" {
		return fallback
	}
	return value
}

func promptBool(reader *bufio.Reader, label string, fallback bool) bool {
	defaultValue := "y"
	if !fallback {
		defaultValue = "n"
	}
	fmt.Printf("%s [y/n, default %s]: ", label, defaultValue)
	value, _ := reader.ReadString('\n')
	value = strings.TrimSpace(strings.ToLower(value))
	if value == "" {
		return fallback
	}
	return value == "y" || value == "yes"
}

func promptList(reader *bufio.Reader, label string, fallback []string) []string {
	value := prompt(reader, label, strings.Join(fallback, ","))
	parts := strings.Split(value, ",")
	out := make([]string, 0, len(parts))
	for _, part := range parts {
		part = strings.TrimSpace(part)
		if part != "" {
			out = append(out, part)
		}
	}
	return out
}

func promptMap(reader *bufio.Reader, label string, fallback map[string]string) map[string]string {
	pairs := make([]string, 0, len(fallback))
	for key, value := range fallback {
		pairs = append(pairs, key+"="+value)
	}
	value := prompt(reader, label, strings.Join(pairs, ","))
	result := map[string]string{}
	for _, pair := range strings.Split(value, ",") {
		parts := strings.SplitN(strings.TrimSpace(pair), "=", 2)
		if len(parts) == 2 && parts[0] != "" && parts[1] != "" {
			result[parts[0]] = parts[1]
		}
	}
	return result
}

func promptNodes(reader *bufio.Reader, defaultNode string) []config.TalosNode {
	countValue := prompt(reader, "Number of Talos nodes", "3")
	count, err := strconv.Atoi(countValue)
	if err != nil || count < 1 {
		count = 3
	}
	result := make([]config.TalosNode, 0, count)
	for i := 0; i < count; i++ {
		name := prompt(reader, fmt.Sprintf("Node %d name", i+1), fmt.Sprintf("talos-node-%02d", i+1))
		role := prompt(reader, fmt.Sprintf("Node %d role", i+1), map[bool]string{i == 0: "controlplane", i != 0: "worker"}[true])
		vmid, _ := strconv.Atoi(prompt(reader, fmt.Sprintf("Node %d VMID", i+1), fmt.Sprintf("10%d", 50+i)))
		cores, _ := strconv.Atoi(prompt(reader, fmt.Sprintf("Node %d cores", i+1), "4"))
		memory, _ := strconv.Atoi(prompt(reader, fmt.Sprintf("Node %d memory MB", i+1), "8192"))
		diskSize := prompt(reader, fmt.Sprintf("Node %d disk size", i+1), "64G")
		proxmoxNode := prompt(reader, fmt.Sprintf("Node %d Proxmox node", i+1), defaultNode)
		tags := promptList(reader, fmt.Sprintf("Node %d tags", i+1), []string{"talos", role})
		mac := prompt(reader, fmt.Sprintf("Node %d primary MAC", i+1), "")
		cidr := prompt(reader, fmt.Sprintf("Node %d primary CIDR", i+1), "192.168.43.0/28")
		ip := prompt(reader, fmt.Sprintf("Node %d primary IP", i+1), "")
		gateway := prompt(reader, fmt.Sprintf("Node %d gateway", i+1), "192.168.43.1")
		vlanID, _ := strconv.Atoi(prompt(reader, fmt.Sprintf("Node %d VLAN ID", i+1), "43"))

		result = append(result, config.TalosNode{
			Name:        name,
			VMID:        vmid,
			Role:        role,
			Cores:       cores,
			Memory:      memory,
			DiskSize:    diskSize,
			Tags:        tags,
			ProxmoxNode: proxmoxNode,
			Networks: []config.TalosNetwork{{
				MACAddress: mac,
				CIDR:       cidr,
				IP:         ip,
				Gateway:    gateway,
				VLANID:     vlanID,
			}},
		})
	}
	return result
}