package main

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

	"git.bullercodeworks.com/brian/gime"
	userConfig "github.com/br0xen/user-config"
)

const (
	AppName       = "gime"
	AppVersion    = 1
	DefDBName     = "gime.db"
	DefArchDBName = "gimearch.db"
)

var validOperations map[string][]string
var activeTimeEntries *gime.TimeEntryCollection
var gdb *gime.GimeDB
var cfg *userConfig.Config

func main() {
	var ret int
	initialize()
	var parms []string

	if len(os.Args) > 1 {
		parms = os.Args[1:]
		parms[0] = matchParameter(parms[0])
	} else {
		// If no parameters were passed, just print the status
		parms = append(parms, "status")
	}

	switch parms[0] {
	case "config":
		ret = cmdDoConfig(parms[1:])
	case "delete", "remove":
		ret = cmdDeleteTimer(parms[1:])
	case "help":
		ret = cmdPrintHelp()
	case "status":
		ret = cmdPrintStatus()
	case "start":
		ret = cmdStartTimer(parms[1:])
	case "end", "stop":
		ret = cmdStopTimer(parms[1:])
	case "list", "ls":
		ret = cmdPrintList(parms[1:])
	default:
		fmt.Println("Unknown command")
		ret = 1
	}
	os.Exit(ret)
}

func cmdDoConfig(args []string) int {
	if len(args) == 0 {
		fmt.Println("Invalid configuration options passed")
		return 1
	}

	for _, opt := range args {
		if strings.Index(opt, "=") == -1 {
			// Single word triggers
			switch opt {
			case "reset":
				fmt.Println("Resetting Configuration...")
				cfg.Set("dbdir", cfg.GetConfigPath()+"/")
				cfg.Set("dbname", DefDBName)
				cfg.Set("dbarchname", DefArchDBName)
			case "list":
				fmt.Println("Current " + AppName + " config")
				for _, v := range cfg.GetKeyList() {
					fmt.Println("  " + v + ": " + cfg.Get(v))
				}
			}
		} else {
			// Key=Value options
			pts := strings.Split(opt, "=")
			if len(pts) == 2 {
				switch pts[0] {
				case "dbdir":
					val := pts[1]
					if val[len(val)-1] != '/' {
						val = val + "/"
					}
					cfg.Set("dbdir", val)
				case "dbname":
					cfg.Set("dbname", pts[1])
				case "dbarchname":
					cfg.Set("dbarchname", pts[1])
				}
			}
		}
	}
	return 0
}

func cmdPrintHelp() int {
	fmt.Println("gime - A simple timekeeping application\n")
	fmt.Println("Usage: gime [@timerID] [operation] [tags...]")
	for _, v := range validOperations {
		for vi := range v {
			fmt.Println("  ", v[vi])
		}
		fmt.Println("")
	}
	return 0
}

func loadActiveTimeEntries() {
	activeTimeEntries = gdb.LoadTimeEntryCollection(gime.TypeCurrent)
}

func cmdPrintList(args []string) int {
	/*
		var err error
		loadActiveTimeEntries()
		// By default, list all entries for today
		currTime := time.Now()
		dur := currTime.Hour()*time.Hour + currTime.Minute()*time.Minute
		if len(args) < 1 {

		}
	*/
	return 0
}

func cmdPrintStatus() int {
	loadActiveTimeEntries()
	curr := time.Now()
	fmt.Println("Current Time:", curr.Format(time.Stamp))
	if activeTimeEntries.Length() == 0 {
		fmt.Println("No timer running")
	} else {
		fmt.Print("Active Timers (", activeTimeEntries.Length(), ")\n")
		for i := 0; i < activeTimeEntries.Length(); i++ {
			v := activeTimeEntries.Get(i)
			if v.GetStart().Day() == curr.Day() {
				fmt.Print("  @"+strconv.Itoa(i)+" ", v.GetStart().Format("15:04"), " ")
			} else {
				fmt.Print("  @"+strconv.Itoa(i)+" ", v.GetStart().Format(time.Stamp), " ")
			}
			since := time.Since(v.GetStart()).String()
			since = strings.Split(since, ".")[0]
			fmt.Print("(" + since + "s) ")
			fmt.Print(v.GetTags().Length())
			if v.GetTags().Length() > 0 {
				fmt.Print(" [ ")
				for j := 0; j < v.GetTags().Length(); j++ {
					fmt.Print(v.GetTags().Get(j))
					if j < v.GetTags().Length()-1 {
						fmt.Print(", ")
					}
				}
				fmt.Print(" ] ")
			}
			fmt.Println("")
		}
	}
	return 0
}

func initialize() {
	var err error
	validOperations = make(map[string][]string)
	validOperations["config"] = []string{
		"config [command]        - Perform configuration",
		"       list             - List current configuration",
		"       reset            - Reset current configuration",
		"       Configuration Options:",
		"         dbdir=[database directory]",
		"         dbname=[database filename]",
		"         dbarchname=[archive database filename]",
	}
	validOperations["detail"] = []string{
		"detail @id              - Print details about a timer",
	}
	validOperations["delete"] = []string{
		"delete @id              - Delete a timer",
	}
	validOperations["end"] = []string{
		"end                     - The same as stop",
	}
	validOperations["help"] = []string{
		"help                    - Print this",
	}
	validOperations["list"] = []string{
		"list [duration] [+tags] - List time entries",
		"                          valid values of [duration] include:",
		"                            day   - List all entries for the current day",
		"                            week  - List all entries for the current week",
		"                            month - List all entries for the current month",
		"                            year  - List all entries for the current year",
		"                          To list entries by tag, preceed the tags with a +",
	}
	validOperations["ls"] = []string{
		"ls [duration] [+tags]   - The same as list",
	}
	validOperations["status"] = []string{
		"status                  - Print the status of all active timers",
	}
	validOperations["start"] = []string{
		"start [time] [tags ...] - Start a timer with the given tags (space separated)",
		"                          If the first sub-argument given looks like a time,",
		"                          the timer will be started then (past or future).",
		"                          If a timer is already running it'll be stopped",
	}
	validOperations["stop"] = []string{
		"stop [time]             - Stops the current timer",
		"                          If the first sub-argument given looks like a time,",
		"                          the timer will be stopped then (past or future).",
	}

	// Load the Config
	cfg, err = userConfig.NewConfig(AppName)
	if err != nil {
		fmt.Println(err.Error())
		fmt.Println("Creating new config")
		cfg.Save()
	}
	// If dbdir isn't set, set it to the config directory
	if cfg.Get("dbdir") == "" {
		cfg.Set("dbdir", cfg.GetConfigPath()+"/")
	}
	// If dbname isn't set, set it to the default database filename
	if cfg.Get("dbname") == "" {
		cfg.Set("dbname", DefDBName)
	}
	// If dbarchivename isn't set, set it to the default archive database filename
	if cfg.Get("dbarchname") == "" {
		cfg.Set("dbarchname", DefArchDBName)
	}
	if gdb, err = gime.LoadDatabase(cfg.Get("dbdir"), cfg.Get("dbname"), cfg.Get("dbarchname")); err != nil {
		fmt.Println("Error loading the database")
		os.Exit(1)
	}
}

func matchParameter(in string) string {
	var chkParms []string
	for k := range validOperations {
		chkParms = append(chkParms, k)
	}
	var nextParms []string
	for i := range in {
		for _, p := range chkParms {
			if p[i] == in[i] {
				nextParms = append(nextParms, p)
			}
		}
		// If we get here and there is only one parameter left, return it
		chkParms = nextParms
		if len(nextParms) == 1 {
			break
		}
		// Otherwise, loop
		nextParms = []string{}
	}
	if len(chkParms) == 0 {
		return ""
	}
	return chkParms[0]
}