package api_gen

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

type Config struct {
	InputDir  string
	OutputDir string
	Module    string
	Formats   []string

	// OpenAPI document metadata.
	Title             string
	Version           string
	Description       string
	ServerURL         string
	ServerDescription string
}

func Run(cfg Config) error {

	pkg, err := parseAPIFiles(cfg.Module)
	if err != nil {
		return fmt.Errorf("failed to parse API files: %w", err)
	}

	absOutput, err := filepath.Abs(cfg.OutputDir)
	if err != nil {
		return fmt.Errorf("failed to resolve output dir: %w", err)
	}

	if err := os.MkdirAll(absOutput, 0755); err != nil {
		return fmt.Errorf("failed to create output dir: %w", err)
	}

	// Generate each requested format.
	for _, format := range cfg.Formats {
		var err error
		switch format {
		case "openapi":
			err = generateOpenAPI(absOutput, pkg, cfg)
		case "docs":
			err = generateDocs(absOutput, pkg)
		case "client":
			err = generateClient(absOutput, pkg)
		case "jsclient":
			err = generateJSClient(absOutput, pkg)
		// case "tstypes":
		// 	err = generateTSTypes(absOutput, pkg)
		case "tsclient":
			err = generateTSClientTypes(absOutput, pkg)
		default:
			err = fmt.Errorf("unknown format: %s", format)
		}
		if err != nil {
			return err
		}
	}

	fmt.Printf("Generated %d API endpoints to %s\n", len(pkg.Endpoints), absOutput)
	return nil
}