//go:build experimental
// +build experimental

package main

import (
	"bytes"
	"encoding/binary"
	"fmt"
	"time"
)

// const (
// 	MessageTypeSearchImage         uint8 = 11
// 	MessageTypeSearchImageThumb    uint8 = 111
// 	MessageTypeSearchImageFull     uint8 = 112
// 	MessageTypeSearchImageAllProxy uint8 = 113
// 	MessageTypeImageResults        uint8 = 22
// )

var imageResultsChan = make(chan []ImageSearchResult)

func sendImageSearchRequestToNode(target, query, safe, lang string, page int, mode uint8) ([]ImageSearchResult, error) {
	payload, err := encodeSearchTextParams(query, safe, lang, page)
	if err != nil {
		return nil, fmt.Errorf("encode error: %v", err)
	}

	msg := Message{
		ID:      generateMessageID(),
		Type:    mode, // one of the image search types
		Content: payload,
		Target:  target,
	}

	if err := sendMessage(msg); err != nil {
		return nil, fmt.Errorf("send error: %v", err)
	}

	select {
	case res := <-imageResultsChan:
		return res, nil
	case <-time.After(30 * time.Second):
		return nil, fmt.Errorf("timeout from %s", target)
	}
}

func handleImageResultsMessage(msg Message) {
	results, err := decodeImageResults([]byte(msg.Content))
	if err != nil {
		printWarn("Error decoding image results: %v", err)
		return
	}
	printDebug("Received image results: %+v", results)

	go func() {
		imageResultsChan <- results
	}()
}

func encodeImageResults(results []ImageSearchResult) ([]byte, error) {
	buf := new(bytes.Buffer)

	if err := binary.Write(buf, binary.BigEndian, uint16(len(results))); err != nil {
		return nil, err
	}

	for _, r := range results {
		if err := writeString(buf, r.ID); err != nil {
			return nil, err
		}
		if err := writeString(buf, r.Title); err != nil {
			return nil, err
		}
		if err := writeString(buf, r.Full); err != nil {
			return nil, err
		}
		if err := writeString(buf, r.Thumb); err != nil {
			return nil, err
		}
		if err := writeString(buf, r.ProxyFull); err != nil {
			return nil, err
		}
		if err := writeString(buf, r.ProxyThumb); err != nil {
			return nil, err
		}
		if err := writeString(buf, r.Source); err != nil {
			return nil, err
		}
		if err := binary.Write(buf, binary.BigEndian, int32(r.Width)); err != nil {
			return nil, err
		}
		if err := binary.Write(buf, binary.BigEndian, int32(r.Height)); err != nil {
			return nil, err
		}
	}

	return buf.Bytes(), nil
}

func decodeImageResults(data []byte) ([]ImageSearchResult, error) {
	buf := bytes.NewReader(data)

	var count uint16
	if err := binary.Read(buf, binary.BigEndian, &count); err != nil {
		return nil, err
	}

	results := make([]ImageSearchResult, 0, count)
	for i := 0; i < int(count); i++ {
		id, _ := readString(buf)
		title, _ := readString(buf)
		full, _ := readString(buf)
		thumb, _ := readString(buf)
		proxyFull, _ := readString(buf)
		proxyThumb, _ := readString(buf)
		source, _ := readString(buf)

		var width, height int32
		if err := binary.Read(buf, binary.BigEndian, &width); err != nil {
			return nil, err
		}
		if err := binary.Read(buf, binary.BigEndian, &height); err != nil {
			return nil, err
		}

		results = append(results, ImageSearchResult{
			ID:         id,
			Title:      title,
			Full:       full,
			Thumb:      thumb,
			ProxyFull:  proxyFull,
			ProxyThumb: proxyThumb,
			Source:     source,
			Width:      int(width),
			Height:     int(height),
		})
	}

	return results, nil
}

func prepareProxiedImages(results []ImageSearchResult, mode uint8) []ImageSearchResult {
	for i := range results {
		switch mode {
		case MsgTypeSearchImageThumbRequest:
			results[i].ProxyThumb = "/image/" + results[i].ID + "_thumb.webp"
		case MsgTypeSearchImageFullRequest:
			results[i].ProxyFull = "/image/" + results[i].ID + "_full.webp"
		case MsgTypeSearchImageAllRequest:
			results[i].ProxyThumb = "/image/" + results[i].ID + "_thumb.webp"
			results[i].ProxyFull = "/image/" + results[i].ID + "_full.webp"
		}
	}
	return results
}

// func handleSearchImageMessage(msg Message) {
// 	query, safe, lang, page, err := decodeSearchTextParams([]byte(msg.Content))
// 	if err != nil {
// 		printWarn("Error decoding image search parameters: %v", err)
// 		return
// 	}

// 	results := fetchImageResults(query, safe, lang, page, true, true)

// 	switch msg.Type {
// 	case MsgTypeSearchImageRawRequest:
// 		// No proxy URLs needed

// 	case MsgTypeSearchImageThumbRequest:
// 		results = prepareProxiedImages(results, MsgTypeSearchImageThumbRequest)
// 	case MsgTypeSearchImageFullRequest:
// 		results = prepareProxiedImages(results, MsgTypeSearchImageFullRequest)
// 	case MsgTypeSearchImageAllRequest:
// 		results = prepareProxiedImages(results, MsgTypeSearchImageAllRequest)
// 	default:
// 		printWarn("Unknown image request mode: %d", msg.Type)
// 		return
// 	}

// 	payload, err := encodeImageResults(results)
// 	if err != nil {
// 		printWarn("Error encoding image search results: %v", err)
// 		return
// 	}

// 	response := Message{
// 		ID:      msg.ID,
// 		Type:    MsgTypeSearchImageResponse,
// 		Content: string(payload),
// 		Target:  msg.Source, // Reply to sender
// 	}

// 	if err := sendMessage(response); err != nil {
// 		printWarn("Error sending image search response: %v", err)
// 	}
// }