// Kuvola Institutional Data API — Go starter (no published module; copy this file)
package kuvola

import (
	"fmt"
	"io"
	"net/http"
)

const BaseURL = "https://kuvola.ao"

type Client struct {
	APIKey string
	HTTP   *http.Client
}

func NewClient(apiKey string) *Client {
	return &Client{APIKey: apiKey, HTTP: &http.Client{}}
}

// v2ListMarkets returns the raw JSON body; response.pagination has totalPages.
func (c *Client) V2ListMarkets() (string, error) {
	req, _ := http.NewRequest("GET", BaseURL+"/api/v2/markets", nil)
	req.Header.Set("Authorization", "Bearer "+c.APIKey)

	resp, err := c.HTTP.Do(req)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()

	body, _ := io.ReadAll(resp.Body)

	if resp.StatusCode == 429 {
		return "", fmt.Errorf("rate limited, reset: %s", resp.Header.Get("X-RateLimit-Reset"))
	}
	if resp.StatusCode >= 400 {
		return "", fmt.Errorf("kuvola API error %d: %s", resp.StatusCode, string(body))
	}
	return string(body), nil
}

// Usage: client := kuvola.NewClient("kv_live_..."); data, err := client.V2ListMarkets()