package server


import (
    "runtime"
    "os/exec"
    "html/template"
	"git.nagee.dev/isthisnagee/diary/model"
    "log"
    "embed"
    "net"
    "net/http"
    "fmt"
    "path"
    "os"
)


//go:embed templates/*
var files embed.FS
var templates map[string]*template.Template

var App *model.App

func getFreePort() (int, error) {
    listener, err := net.Listen("tcp", ":0")
    if err != nil {
        return 0, err
    }
    defer listener.Close()
    return listener.Addr().(*net.TCPAddr).Port, nil
}

func openBrowser(url string) {
	var err error

    log.Print(url)

	switch runtime.GOOS {
	case "linux":
		err = exec.Command("xdg-open", url).Start()
	case "windows":
		err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
	case "darwin":
		err = exec.Command("open", url).Start()
	default:
		err = fmt.Errorf("unsupported platform")
	}
	if err != nil {
		log.Fatal(err)
	}

}

func LoadTemplates() error {
    template.PareseFS(content)

}

func Index(w http.ResponseWriter, r *http.Request) {
    tmpl, err = template.ParseFS(files, "index.html")
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }


    log.Print(tmpl)
    data := App.GetDiaryEntries(model.GetDiaryEntriesQuery{})
    if err := tmpl.Execute(w, data); err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
    }
}


func setup() {
	home, err := os.UserHomeDir()
    if err != nil { 
        panic(err)
    }
    var db_path = path.Join(home, ".diary.sql")
    app, err := model.NewApp(db_path)
    if err != nil { 
        panic(err)
    }
    App = app
}

func Run() {
    setup()

    http.HandleFunc("/", Index)

    port, err := getFreePort()
    if err != nil { 
        panic(err)
    }

    log.Print("opening browser")
    openBrowser(fmt.Sprintf("http://localhost:%d", port))
    log.Print("done")
    if err := http.ListenAndServe(fmt.Sprintf(":%d", port), nil); err != nil {
        panic(err)
    }

}