package data

import (
	"fmt"
	"strings"
)

const (
	DATE_FORMAT string = "Monday Jan 2, 2006 3:04pm"
)

type Player struct {
	Name      string `json:"name"`
	Attending string `json:"attending"`
	ToggleUrl string `json:"-"`
	Email     string `json:"email"`
	Gm        bool   `json:"gm"`
}

type Session struct {
	Date               string   `json:"date"`
	Players            []Player `json:"players"`
	IncrementDays      int      `json:"inc_days"`
	Status             string   `json:"status"`
	Password           string   `json:"password"`
	LastNoticeSentDate string   `json:"last_notice_sent_date,omitempty"`
}

func (s *Session) GMEmail() string {
	for _, p := range s.Players {
		if p.Gm {
			return p.Email
		}
	}
	return ""
}

func (s *Session) FormatStatusUpdate(playerName, newStatus, source string) (string, string) {
	subject := fmt.Sprintf("Player Status Update: %s → %s", playerName, newStatus)

	var yes, no, unknown int
	for _, p := range s.Players {
		switch p.Attending {
		case "yes":
			yes++
		case "no":
			no++
		default:
			unknown++
		}
	}

	var sb strings.Builder
	fmt.Fprintf(&sb, "%s has updated their status to %q (via %s).\n\n", playerName, newStatus, source)
	fmt.Fprintf(&sb, "Attending: %d  |  Not attending: %d  |  No response: %d\n\n", yes, no, unknown)
	sb.WriteString("Current player status:\n")
	for _, p := range s.Players {
		role := ""
		if p.Gm {
			role = " (GM)"
		}
		fmt.Fprintf(&sb, "  %s%s: %s\n", p.Name, role, p.Attending)
	}

	return subject, sb.String()
}

func (s *Session) FormatGameDayNotice() (string, string) {
	subject := fmt.Sprintf("Game Day Status Check: %s", s.Date)

	var yes, no, unknown int
	for _, p := range s.Players {
		switch p.Attending {
		case "yes":
			yes++
		case "no":
			no++
		default:
			unknown++
		}
	}

	var sb strings.Builder
	fmt.Fprintf(&sb, "Today is game day (%s). Here is the current player status.\n\n", s.Date)
	fmt.Fprintf(&sb, "Attending: %d  |  Not attending: %d  |  No response: %d\n\n", yes, no, unknown)
	sb.WriteString("Current player status:\n")
	for _, p := range s.Players {
		role := ""
		if p.Gm {
			role = " (GM)"
		}
		fmt.Fprintf(&sb, "  %s%s: %s\n", p.Name, role, p.Attending)
	}

	return subject, sb.String()
}

func (s *Session) GetPlayerByEmail(addr string) *Player {
	for i, p := range s.Players {
		if addr == p.Email {
			return &s.Players[i]
		}
	}

	return nil
}