package client

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

func (c *Client) SearchGitHubLeads(query string, callback func(result json.RawMessage) error) error {
	path := "/github/leads"

	params := url.Values{}
	params.Set("q", query)

	fullURL := c.config.BaseURL + path + "?" + params.Encode()

	req, err := http.NewRequest(http.MethodGet, fullURL, nil)
	if err != nil {
		return fmt.Errorf("failed to create request: %w", err)
	}

	req.Header.Set("User-Agent", c.config.UserAgent)
	req.Header.Set("Accept", "application/x-ndjson, application/json")

	resp, err := c.httpClient.Do(req)
	if err != nil {
		return fmt.Errorf("failed to execute request: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		return fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(body))
	}

	scanner := bufio.NewScanner(resp.Body)
	for scanner.Scan() {
		line := scanner.Bytes()
		if len(line) == 0 {
			continue
		}

		if err := callback(json.RawMessage(line)); err != nil {
			return err
		}
	}

	if err := scanner.Err(); err != nil {
		if !strings.Contains(err.Error(), "context deadline exceeded") && !strings.Contains(err.Error(), "timeout") {
			return fmt.Errorf("stream reading error: %w", err)
		}
	}

	return nil
}

func (c *Client) SearchGitHubLeadsWithParams(query, sort, exclude, format, bio string, callback func(result json.RawMessage) error) error {
	path := "/github/leads"

	params := url.Values{}
	if query != "" {
		params.Set("q", query)
	}
	if sort != "" {
		params.Set("sort", sort)
	}
	if exclude != "" {
		params.Set("exclude", exclude)
	}
	if format != "" {
		params.Set("format", format)
	}
	if bio != "" {
		params.Set("bio", bio)
	}

	fullURL := c.config.BaseURL + path
	if len(params) > 0 {
		fullURL += "?" + params.Encode()
	}

	req, err := http.NewRequest(http.MethodGet, fullURL, nil)
	if err != nil {
		return fmt.Errorf("failed to create request: %w", err)
	}

	req.Header.Set("User-Agent", c.config.UserAgent)
	req.Header.Set("Accept", "application/x-ndjson, application/json")
	req.Header.Set("Connection", "keep-alive")
	req.ProtoMajor = 1
	req.ProtoMinor = 1

	http1Client := &http.Client{
		Timeout: c.config.Timeout,
		Transport: &http.Transport{
			ForceAttemptHTTP2: false,
		},
	}

	resp, err := http1Client.Do(req)
	if err != nil {
		return fmt.Errorf("failed to execute request: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(resp.Body)
		return fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(body))
	}

	scanner := bufio.NewScanner(resp.Body)
	for scanner.Scan() {
		line := scanner.Bytes()
		if len(line) == 0 {
			continue
		}

		if err := callback(json.RawMessage(line)); err != nil {
			return err
		}
	}

	if err := scanner.Err(); err != nil {
		if !strings.Contains(err.Error(), "context deadline exceeded") && !strings.Contains(err.Error(), "timeout") {
			return fmt.Errorf("stream reading error: %w", err)
		}
	}

	return nil
}