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package main

import (
	"bufio"
	"flag"
	"fmt"
	"os"
	"strings"

	"github.com/gocql/gocql"
)

func main() {
	configPath := flag.String("config", os.Getenv("HOME")+"/.config/cqlminus/config.json", "path to json config file")
	flag.Parse()

	cfg, err := LoadConfig(*configPath)
	if err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}

	session, err := Connect(cfg)
	if err != nil {
		fmt.Fprintf(os.Stderr, "error: %v\n", err)
		os.Exit(1)
	}
	defer session.Close()

	fmt.Printf("connected to %s:%d keyspace=%s\n", cfg.Server, cfg.Port, cfg.Keyspace)
	fmt.Println("enter CQL queries, terminate with ; then enter. type exit or quit to leave.")

	runLoop(session)
}

func runLoop(session *gocql.Session) {
	reader := bufio.NewReader(os.Stdin)
	var buffer strings.Builder

	for {
		if buffer.Len() == 0 {
			fmt.Print("cql> ")
		} else {
			fmt.Print("...> ")
		}

		line, err := reader.ReadString('\n')
		if err != nil {
			fmt.Println()
			return
		}

		trimmed := strings.TrimSpace(line)

		if buffer.Len() == 0 {
			lower := strings.ToLower(trimmed)
			if lower == "exit" || lower == "quit" {
				return
			}
			if trimmed == "" {
				continue
			}
		}

		buffer.WriteString(line)

		if !strings.HasSuffix(trimmed, ";") {
			continue
		}

		query := strings.TrimSpace(buffer.String())
		query = strings.TrimSuffix(query, ";")
		buffer.Reset()

		if query == "" {
			continue
		}

		result, err := RunQuery(session, query)
		if err != nil {
			PrintError(err)
			continue
		}

		PrintTable(result)
	}
}