/*
Copyright © 2025 Wiki Cafe <mail@wiki.cafe>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd

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

	"git.coopcloud.tech/wiki-cafe/member-console/internal/config"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/embeds"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/integrations"
	"github.com/spf13/cobra"
)

// initCmd represents the init command
var initCmd = &cobra.Command{
	Use:   "init [path]",
	Short: "Create the directory structure needed for the member-console",
	Long: `The init command creates the directory structure and files needed for the
	member-console web application in the current directory.
	
	A different directory can be specified using the --dir flag.`,
	Args: cobra.ExactArgs(1),
	Run: func(cmd *cobra.Command, args []string) {
		// Create the directories and files needed for the member-console web application
		targetDir := args[0]

		// Create the target directory if it doesn't exist
		if err := os.MkdirAll(targetDir, 0755); err != nil {
			fmt.Fprintf(os.Stderr, "Error creating target directory: %v\n", err)
			os.Exit(1)
		}

		// Create the templates, static, and assets directories
		directories := []string{"templates", "static", "assets"}
		for _, dir := range directories {
			dirPath := filepath.Join(targetDir, dir)
			if err := os.MkdirAll(dirPath, 0755); err != nil {
				fmt.Fprintf(os.Stderr, "Error creating %s directory: %v\n", dir, err)
				os.Exit(1)
			}
		}

		// Write the embedded starter config template plus one generated
		// section per installed integration that declares configuration
		// (console-init spec: integration sections are generated from each
		// ConfigSpec, never hand-maintained).
		configFilePath := filepath.Join(targetDir, "mc-config.yaml")
		configTemplate, err := embeds.Config.ReadFile("mc-config.yaml")
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error reading embedded config template: %v\n", err)
			os.Exit(1)
		}
		scaffold := append(configTemplate, []byte(integrationConfigSections())...)
		if err := os.WriteFile(configFilePath, scaffold, 0o644); err != nil {
			fmt.Fprintf(os.Stderr, "Error writing config file: %v\n", err)
			os.Exit(1)
		}
		fmt.Printf("Created config file at %s (edit it, then run `member-console start`)\n", configFilePath)

		fmt.Printf("Project initialized at %s\n", targetDir)
	},
}

// integrationConfigSections renders one commented scaffold section per
// registered integration that declares configuration, from its ConfigSpec:
// every key with its usage text, its declared default when one exists, and a
// "-file" variant note for secrets. Comment lines only, so the scaffold stays
// valid YAML regardless of key types, and a new integration appears here with
// no change to this file or the embedded template.
func integrationConfigSections() string {
	var b strings.Builder
	for _, integ := range integrations.All() {
		cp, ok := integ.(config.ConfigProvider)
		if !ok {
			continue
		}
		displayName := integ.Provider().ProviderManifest().DisplayName
		fmt.Fprintf(&b, "\n# --- Optional: %s integration (uncomment and fill in to enable) ---\n", displayName)
		for _, key := range cp.ConfigSpec() {
			fmt.Fprintf(&b, "# %s\n", key.Usage)
			switch def := key.Default.(type) {
			case nil:
				fmt.Fprintf(&b, "# %s: \"\"\n", key.Name)
			case []string:
				fmt.Fprintf(&b, "# %s: []\n", key.Name)
			case bool:
				fmt.Fprintf(&b, "# %s: %v\n", key.Name, def)
			case string:
				fmt.Fprintf(&b, "# %s: %q\n", key.Name, def)
			default:
				// Durations and any future scalar render via %v inside
				// quotes; viper parses the string form back.
				fmt.Fprintf(&b, "# %s: \"%v\"\n", key.Name, def)
			}
			if key.Secret {
				fmt.Fprintf(&b, "# %s-file: \"\"  # alternative: read the secret from a file path\n", key.Name)
			}
		}
	}
	return b.String()
}

func init() {
	rootCmd.AddCommand(initCmd)
}