package cmd

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
	"time"

	"code.c-base.org/baccenfutter/govote/store"
	"code.c-base.org/baccenfutter/govote/utils"
	"code.c-base.org/baccenfutter/govote/voting/quorum"
	"code.c-base.org/baccenfutter/govote/voting/threshold"
	"github.com/urfave/cli/v2"
)

var newCmd = &cli.Command{
  Name: "new",
  Usage: "➕ Create a voting",
  Flags: []cli.Flag{
    &cli.StringFlag{
      Name: "deadline",
      Usage: "Duration for which this voting is open",
      Aliases: []string{"D"},
      Value: "1m",
    },
    &cli.StringFlag{
      Name: "quorum",
      Usage: "Minimum required number of participants",
      Aliases: []string{"Q"},
      Value: "SIMPLE",
    },
    &cli.StringFlag{
      Name: "threshold",
      Usage: "Minimum number of positive votes",
      Aliases: []string{"T"},
      Value: "SIMPLE",
    },
    &cli.StringFlag{
      Name: "electors",
      Usage: "Comma-separated list of eligible electors or empty if anyone can vote",
      Aliases: []string{"E"},
    },
    &cli.BoolFlag{
      Name: "anonymous",
      Usage: "Public visibility of votes.",
      Aliases: []string{"A"},
      Value: false,
    },
  },
  Action: func(ctx *cli.Context) error {
    deadline := ctx.String("deadline")
    deadlineNum := fmt.Sprintf("%s", deadline[:len(deadline)-1])
    deadlineUnit := fmt.Sprintf("%s", deadline[len(deadline)-1:])

    deadlineInt, err := strconv.Atoi(deadlineNum)
    if err != nil {
      return err
    }

    if !strings.Contains("mhd", deadlineUnit) {
      return fmt.Errorf("invalid deadline unit '%s'. use one of: [ m | d | h ]", deadlineUnit)
    }

    var d time.Time
    switch deadlineUnit {
    case "m", "":
      d = time.Now().UTC().Add(time.Duration(deadlineInt)*time.Minute).Round(time.Second)
    case "h":
      d = time.Now().UTC().Add(time.Duration(deadlineInt)*time.Hour).Round(time.Second)
    case "d":
      d = time.Now().UTC().Add(time.Duration(deadlineInt)*time.Hour*24).Round(time.Second)
    default:
      panic("this code should never be reached")
    }

    var (
      q quorum.Quorum
      t threshold.Threshold
    )
    if q, err = quorum.FromString(ctx.String("quorum")); err != nil {
      return err
    }
    if t, err = threshold.FromString(ctx.String("threshold")); err != nil {
      return err
    }
    e := strings.Split(ctx.String("electors"), " ")
    a := ctx.Bool("anonymous")

    var r = ""
    if ctx.Args().Len() == 0 {
      fmt.Print("Give your referendum a concise name or subject: ")
      inputReader := bufio.NewReader(os.Stdin)
      r, _ = inputReader.ReadString('\n')
      r = r[:len(r)-1]
    } else {
      r = strings.Join(ctx.Args().Slice(), " ")
    }

    id := utils.GenerateRandomString(11)
    if err := store.NewVoting(string(id), r, d, q, t, e, a); err != nil {
      return err
    }
    fmt.Println(string(id))
    return nil
  },
}