// Package main is the entry point for the preferences-api service.
package main

import (
	"database/sql"
	"flag"
	"fmt"
	"os"

	_ "github.com/lib/pq"

	"git.threesix.ai/jordan/slack5-1770574304/pkg/app"
	"git.threesix.ai/jordan/slack5-1770574304/pkg/config"
	"git.threesix.ai/jordan/slack5-1770574304/pkg/logging"
	"git.threesix.ai/jordan/slack5-1770574304/services/preferences-api/internal/adapter/postgres"
	"git.threesix.ai/jordan/slack5-1770574304/services/preferences-api/internal/api"
	"git.threesix.ai/jordan/slack5-1770574304/services/preferences-api/internal/service"
)

func main() {
	// Parse flags
	exportOpenAPI := flag.Bool("export-openapi", false, "Export OpenAPI spec to stdout and exit")
	flag.Parse()

	// If exporting OpenAPI, generate spec and exit (used by CI for docs generation)
	if *exportOpenAPI {
		spec := api.NewServiceSpec()
		jsonBytes, err := spec.JSON()
		if err != nil {
			fmt.Fprintf(os.Stderr, "failed to generate OpenAPI spec: %v\n", err)
			os.Exit(1)
		}
		fmt.Println(string(jsonBytes))
		os.Exit(0)
	}

	// Create logger
	logger := logging.Default()

	// Load database config
	dbCfg := config.ReadDatabaseConfig()

	// Open PostgreSQL connection
	db, err := sql.Open("postgres", dbCfg.URL)
	if err != nil {
		logger.Error("failed to open database", "error", err)
		os.Exit(1)
	}
	defer db.Close()

	if dbCfg.MaxOpenConns > 0 {
		db.SetMaxOpenConns(dbCfg.MaxOpenConns)
	}
	if dbCfg.MaxIdleConns > 0 {
		db.SetMaxIdleConns(dbCfg.MaxIdleConns)
	}
	if dbCfg.ConnMaxLifetime > 0 {
		db.SetConnMaxLifetime(dbCfg.ConnMaxLifetime)
	}

	// Create adapters (repositories)
	prefRepo, err := postgres.NewPreferenceRepository(db)
	if err != nil {
		logger.Error("failed to create preference repository", "error", err)
		os.Exit(1)
	}

	// Create services (business logic)
	preferenceService := service.NewPreferenceService(prefRepo, logger)

	// Create application
	application := app.New("preferences-api", app.WithDefaultPort(8001))

	// Register routes with dependency injection
	api.RegisterRoutes(application, preferenceService)

	// Start server
	application.Run()
}