package toolbox

import (
	"fmt"
	"os"

	toolutil "git.mlow.ca/mlow/lmcli/pkg/agent/toolbox/util"
	"git.mlow.ca/mlow/lmcli/pkg/api"
)

const WRITE_FILE_DESCRIPTION = `Write the provided contents to a file relative to the current working directory.

Example result:
{
	"message": "success"
}`

var WriteFileTool = api.ToolSpec{
	Name:        "write_file",
	Description: WRITE_FILE_DESCRIPTION,
	Parameters: []api.ToolParameter{
		{
			Name:        "path",
			Type:        "string",
			Description: "Path to a file within the current working directory to write to.",
			Required:    true,
		},
		{
			Name:        "content",
			Type:        "string",
			Description: "The content to write to the file. Overwrites any existing content!",
			Required:    true,
		},
	},
	Impl: func(t *api.ToolSpec, args map[string]interface{}) (string, error) {
		tmp, ok := args["path"]
		if !ok {
			return "", fmt.Errorf("Path parameter to write_file was not included.")
		}
		path, ok := tmp.(string)
		if !ok {
			return "", fmt.Errorf("Invalid path in function arguments: %v", tmp)
		}
		tmp, ok = args["content"]
		if !ok {
			return "", fmt.Errorf("Content parameter to write_file was not included.")
		}
		content, ok := tmp.(string)
		if !ok {
			return "", fmt.Errorf("Invalid content in function arguments: %v", tmp)
		}
		result := writeFile(path, content)
		ret, err := result.ToJson()
		if err != nil {
			return "", fmt.Errorf("Could not serialize result: %v", err)
		}
		return ret, nil
	},
}

func writeFile(path string, content string) api.CallResult {
	ok, reason := toolutil.IsPathWithinCWD(path)
	if !ok {
		return api.CallResult{Message: reason}
	}
	err := os.WriteFile(path, []byte(content), 0644)
	if err != nil {
		return api.CallResult{Message: fmt.Sprintf("Could not write to path: %s", err.Error())}
	}
	return api.CallResult{}
}