package client

import (
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/url"
	"time"
)

// Client for open hardware monitor
type Client struct {
	Timeout time.Duration
	URL     url.URL
}

// Fetch requests
func (c *Client) Fetch() (*Node, error) {
	client := http.Client{Timeout: c.Timeout}
	resp, err := client.Get(c.URL.String())
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	return c.Decode(resp.Body)
}

// Decode json
func (c *Client) Decode(r io.Reader) (*Node, error) {
	node := &Node{}
	decoder := json.NewDecoder(r)
	if err := decoder.Decode(node); err != nil {
		return nil, err
	}
	return node, nil
}

// Node from data
type Node struct {
	ID       int `json:"id"`
	ImageURL string
	Max      string
	Min      string
	Text     string
	Value    string
	Children []Node
}

func (n *Node) String() string {
	return n.stringify(0)
}

func (n *Node) stringify(indent int) string {
	prefix := ""
	for i := 0; i < indent; i++ {
		prefix += "  "
	}

	ret := prefix + n.Text
	if n.Value != "" {
		ret += ": " + n.Value
	}
	if n.Max != "" && n.Min != "" && n.Max != "-" && n.Min != "-" {
		ret += fmt.Sprintf(" (%s - %s)", n.Min, n.Max)
	}
	ret += "\n"
	for _, child := range n.Children {
		ret += child.stringify(indent + 1)
	}

	return ret
}