package main

import (
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"
	"time"
)

// TimerStats holds persistent statistics and settings
type TimerStats struct {
	TotalPomodoros int    `json:"total_pomodoros"`
	TodayPomodoros int    `json:"today_pomodoros"`
	LastDate       string `json:"last_date"`
	FocusDuration  int    `json:"focus_duration"`  // minutes
	ShortBreak     int    `json:"short_break"`     // minutes
	LongBreak      int    `json:"long_break"`      // minutes
	LongBreakAfter int    `json:"long_break_after"` // after how many pomodoros
}

func getStoragePath() string {
	home, err := os.UserHomeDir()
	if err != nil {
		return "doxa_timer.json"
	}
	configDir := filepath.Join(home, ".doxa-timer")
	if _, err := os.Stat(configDir); os.IsNotExist(err) {
		os.MkdirAll(configDir, 0755)
	}
	return filepath.Join(configDir, "doxa_timer.json")
}

func loadStats() TimerStats {
	path := getStoragePath()
	file, err := os.ReadFile(path)
	if err != nil {
		return defaultStats()
	}
	var stats TimerStats
	if err := json.Unmarshal(file, &stats); err != nil {
		return defaultStats()
	}
	// Reset today's count if it's a new day
	today := time.Now().Format("2006-01-02")
	if stats.LastDate != today {
		stats.TodayPomodoros = 0
		stats.LastDate = today
	}
	// Ensure sane defaults if values are zero
	if stats.FocusDuration == 0 {
		stats.FocusDuration = 25
	}
	if stats.ShortBreak == 0 {
		stats.ShortBreak = 5
	}
	if stats.LongBreak == 0 {
		stats.LongBreak = 15
	}
	if stats.LongBreakAfter == 0 {
		stats.LongBreakAfter = 4
	}
	return stats
}

func saveStats(stats TimerStats) {
	path := getStoragePath()
	data, err := json.MarshalIndent(stats, "", "  ")
	if err != nil {
		fmt.Println("Chyba při ukládání dat:", err)
		return
	}
	os.WriteFile(path, data, 0644)
}

func defaultStats() TimerStats {
	return TimerStats{
		TotalPomodoros: 0,
		TodayPomodoros: 0,
		LastDate:       time.Now().Format("2006-01-02"),
		FocusDuration:  25,
		ShortBreak:     5,
		LongBreak:      15,
		LongBreakAfter: 4,
	}
}