package api

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"

	"github.com/paramah/ai_devs4/s01e02/internal/domain"
)

// Client implements domain.APIClient
type Client struct {
	locationsURL   string
	accessLevelURL string
	httpClient     *http.Client
}

// NewClient creates a new API client
func NewClient(locationsURL, accessLevelURL string) *Client {
	return &Client{
		locationsURL:   locationsURL,
		accessLevelURL: accessLevelURL,
		httpClient:     &http.Client{},
	}
}

// GetLocation sends a location request and returns the raw JSON response
func (c *Client) GetLocation(ctx context.Context, req domain.LocationRequest) ([]byte, error) {
	jsonData, err := json.Marshal(req)
	if err != nil {
		return nil, fmt.Errorf("marshaling request: %w", err)
	}

	httpReq, err := http.NewRequestWithContext(ctx, "POST", c.locationsURL, bytes.NewBuffer(jsonData))
	if err != nil {
		return nil, fmt.Errorf("creating request: %w", err)
	}
	httpReq.Header.Set("Content-Type", "application/json")

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

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("reading response: %w", err)
	}

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("unexpected status code: %d, body: %s", resp.StatusCode, string(body))
	}

	return body, nil
}

// GetAccessLevel sends an access level request and returns the raw JSON response
func (c *Client) GetAccessLevel(ctx context.Context, req domain.AccessLevelRequest) ([]byte, error) {
	jsonData, err := json.Marshal(req)
	if err != nil {
		return nil, fmt.Errorf("marshaling request: %w", err)
	}

	httpReq, err := http.NewRequestWithContext(ctx, "POST", c.accessLevelURL, bytes.NewBuffer(jsonData))
	if err != nil {
		return nil, fmt.Errorf("creating request: %w", err)
	}
	httpReq.Header.Set("Content-Type", "application/json")

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

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("reading response: %w", err)
	}

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("unexpected status code: %d, body: %s", resp.StatusCode, string(body))
	}

	return body, nil
}