package backend_golang

import (
	"errors"
	"os/exec"
	"runtime"
	"strconv"
)

func (a *App) StartServer(python string, port int, host string) (string, error) {
	var err error
	if python == "" {
		python, err = GetPython()
	}
	if err != nil {
		return "", err
	}
	return Cmd(python, "./backend-python/main.py", strconv.Itoa(port), host)
}

func (a *App) ConvertModel(python string, modelPath string, strategy string, outPath string) (string, error) {
	var err error
	if python == "" {
		python, err = GetPython()
	}
	if err != nil {
		return "", err
	}
	return Cmd(python, "./backend-python/convert_model.py", "--in", modelPath, "--out", outPath, "--strategy", strategy)
}

func (a *App) DepCheck(python string) error {
	var err error
	if python == "" {
		python, err = GetPython()
	}
	if err != nil {
		return err
	}
	out, err := exec.Command(python, a.exDir+"./backend-python/dep_check.py").CombinedOutput()
	if err != nil {
		return errors.New("DepCheck Error: " + string(out))
	}
	return nil
}

func (a *App) InstallPyDep(python string, cnMirror bool) (string, error) {
	var err error
	if python == "" {
		python, err = GetPython()
	}
	if err != nil {
		return "", err
	}

	if runtime.GOOS == "windows" {
		ChangeFileLine("./py310/python310._pth", 3, "Lib\\site-packages")
	}

	if runtime.GOOS == "windows" {
		if cnMirror {
			_, err = Cmd(python, "./backend-python/get-pip.py", "-i", "https://pypi.tuna.tsinghua.edu.cn/simple")
		} else {
			_, err = Cmd(python, "./backend-python/get-pip.py")
		}
		if err != nil {
			return "", err
		}
	}

	if runtime.GOOS == "windows" {
		_, err = Cmd(python, "-m", "pip", "install", "torch==1.13.1", "torchvision==0.14.1", "torchaudio==0.13.1", "--index-url", "https://download.pytorch.org/whl/cu117")
	} else {
		_, err = Cmd(python, "-m", "pip", "install", "torch", "torchvision", "torchaudio")
	}
	if err != nil {
		return "", err
	}

	if runtime.GOOS == "windows" {
		if cnMirror {
			return Cmd(python, "-m", "pip", "install", "-r", "./backend-python/requirements.txt", "-i", "https://pypi.tuna.tsinghua.edu.cn/simple")
		} else {
			return Cmd(python, "-m", "pip", "install", "-r", "./backend-python/requirements_versions.txt")
		}
	} else {
		if cnMirror {
			return Cmd(python, "-m", "pip", "install", "-r", "./backend-python/requirements_without_cyac.txt", "-i", "https://pypi.tuna.tsinghua.edu.cn/simple")
		} else {
			return Cmd(python, "-m", "pip", "install", "-r", "./backend-python/requirements_without_cyac.txt")
		}
	}
}