package cmd

import (
	"fmt"
	"os"
	"path/filepath"
	"strconv"

	"github.com/spf13/cobra"

	"github.com/nextlevelbuilder/goclaw/internal/config"
)

func onboardCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "onboard",
		Short: "Quick setup — configure database, generate keys, run migrations",
		Run: func(cmd *cobra.Command, args []string) {
			runOnboard()
		},
	}
}

func runOnboard() {
	fmt.Println("╔══════════════════════════════════════════════╗")
	fmt.Println("║        GoClaw — Quick Setup                 ║")
	fmt.Println("╚══════════════════════════════════════════════╝")
	fmt.Println()

	cfgPath := resolveConfigPath()
	cfg := config.Default()

	// Load existing config if present (preserve gateway port, etc.)
	if _, err := os.Stat(cfgPath); err == nil {
		if loaded, err := config.Load(cfgPath); err == nil {
			cfg = loaded
		}
	}

	// ── Step 1: Postgres connection ──
	postgresDSN := os.Getenv("GOCLAW_POSTGRES_DSN")
	if postgresDSN == "" {
		postgresDSN = cfg.Database.PostgresDSN
	}
	if postgresDSN == "" {
		fmt.Println("── Database Connection ──")
		fmt.Println("  Enter your PostgreSQL connection details (press Enter for defaults).")
		fmt.Println()

		dsn, err := promptPostgresFields()
		if err != nil {
			fmt.Println("Cancelled.")
			return
		}
		postgresDSN = dsn
	} else {
		fmt.Printf("  Using Postgres DSN from environment\n")
	}

	// ── Step 2: Test connection ──
	fmt.Print("  Testing Postgres connection... ")
	if err := testPostgresConnection(postgresDSN); err != nil {
		fmt.Println("FAILED")
		fmt.Printf("  Error: %v\n", err)
		fmt.Println("  Please check your DSN and try again: ./goclaw onboard")
		return
	}
	fmt.Println("OK")

	// ── Step 3: Generate keys ──
	gatewayToken := os.Getenv("GOCLAW_GATEWAY_TOKEN")
	if gatewayToken == "" {
		gatewayToken = cfg.Gateway.Token
	}
	generatedToken := false
	if gatewayToken == "" {
		gatewayToken = onboardGenerateToken(16)
		generatedToken = true
	}

	encryptionKey := os.Getenv("GOCLAW_ENCRYPTION_KEY")
	generatedEncKey := false
	if encryptionKey == "" {
		encryptionKey = onboardGenerateToken(32)
		generatedEncKey = true
	}
	os.Setenv("GOCLAW_ENCRYPTION_KEY", encryptionKey)

	// ── Step 4: Migrations ──
	fmt.Print("  Running migrations... ")
	m, err := newMigrator(postgresDSN)
	if err != nil {
		fmt.Printf("FAILED: %v\n", err)
		fmt.Println("  You can run it manually later: ./goclaw migrate up")
	} else {
		if err := m.Up(); err != nil && err.Error() != "no change" {
			fmt.Printf("FAILED: %v\n", err)
			fmt.Println("  You can run it manually later: ./goclaw migrate up")
		} else {
			v, _, _ := m.Version()
			fmt.Printf("OK (version: %d)\n", v)
		}
		m.Close()
	}

	// ── Step 5: Seed placeholder providers for UI ──
	fmt.Print("  Seeding placeholder providers... ")
	if err := seedOnboardPlaceholders(postgresDSN); err != nil {
		fmt.Printf("warning: %v\n", err)
	} else {
		fmt.Println("OK")
	}

	// ── Step 6: Save config ──
	if cfg.Gateway.Host == "" {
		cfg.Gateway.Host = "0.0.0.0"
	}
	if cfg.Gateway.Port == 0 {
		cfg.Gateway.Port = 18790
	}
	cfg.Database.PostgresDSN = "" // secrets go in .env.local, not config
	cfg.Gateway.Token = ""       // secrets go in .env.local, not config

	if err := config.Save(cfgPath, cfg); err != nil {
		fmt.Printf("  Error saving config: %v\n", err)
		os.Exit(1)
	}

	// ── Step 7: Save .env.local ──
	envPath := filepath.Join(filepath.Dir(cfgPath), ".env.local")
	onboardWriteEnvFile(envPath, postgresDSN, gatewayToken, encryptionKey)

	// ── Summary ──
	port := strconv.Itoa(cfg.Gateway.Port)

	fmt.Println()
	fmt.Println("╔══════════════════════════════════════════════╗")
	fmt.Println("║           Setup Complete!                    ║")
	fmt.Println("╚══════════════════════════════════════════════╝")
	fmt.Println()

	if generatedToken || generatedEncKey {
		fmt.Println("── Generated Secrets (shown once, saved to .env.local) ──")
		fmt.Println()
		if generatedToken {
			fmt.Printf("  Gateway Token:   %s\n", gatewayToken)
		}
		if generatedEncKey {
			fmt.Printf("  Encryption Key:  %s\n", encryptionKey)
		}
		fmt.Println()
		fmt.Println("  ⚠  These keys are shown only once. They are saved in:")
		fmt.Printf("    → %s\n", envPath)
		fmt.Println()
	}

	fmt.Println("── Files ──")
	fmt.Println()
	fmt.Printf("  Config:    %s  (gateway host/port, no secrets)\n", cfgPath)
	fmt.Printf("  Secrets:   %s  (GOCLAW_POSTGRES_DSN, GOCLAW_GATEWAY_TOKEN, GOCLAW_ENCRYPTION_KEY)\n", envPath)
	fmt.Println()

	fmt.Println("── Next Steps ──")
	fmt.Println()
	fmt.Println("  1. Start the gateway:")
	fmt.Printf("     source %s && ./goclaw\n", envPath)
	fmt.Println()
	fmt.Println("  2. Open the dashboard to complete setup:")
	fmt.Printf("     http://localhost:%s\n", port)
	fmt.Println()
	fmt.Println("     The setup wizard will guide you through:")
	fmt.Println("     → Provider & API key configuration")
	fmt.Println("     → Model selection & verification")
	fmt.Println("     → Agent creation")
	fmt.Println("     → Channel setup (optional)")
	fmt.Println()
}