package infra

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

// metabaseRequest ejecuta una peticion HTTP contra la API de Metabase.
// method: GET, POST, PUT, DELETE
// baseURL: URL base sin trailing slash
// token: session token o API key
// path: ruta relativa (ej: "/api/user")
// body: payload JSON (nil para requests sin body)
// Retorna el body deserializado como map o nil si el body esta vacio.
func metabaseRequest(method, baseURL, token, path string, body map[string]any) (map[string]any, error) {
	var reqBody io.Reader
	if body != nil {
		data, err := json.Marshal(body)
		if err != nil {
			return nil, fmt.Errorf("marshal body: %w", err)
		}
		reqBody = bytes.NewReader(data)
	}

	req, err := http.NewRequest(method, baseURL+path, reqBody)
	if err != nil {
		return nil, fmt.Errorf("new request: %w", err)
	}

	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-Metabase-Session", token)

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("http %s %s: %w", method, path, err)
	}
	defer resp.Body.Close()

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

	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return nil, fmt.Errorf("metabase %s %s: status %d: %s", method, path, resp.StatusCode, string(respBody))
	}

	if len(respBody) == 0 {
		return nil, nil
	}

	var result map[string]any
	if err := json.Unmarshal(respBody, &result); err != nil {
		return nil, fmt.Errorf("unmarshal response: %w", err)
	}

	return result, nil
}

// metabaseRequestList es como metabaseRequest pero para endpoints que retornan un array JSON.
func metabaseRequestList(method, baseURL, token, path string, body map[string]any) ([]map[string]any, error) {
	var reqBody io.Reader
	if body != nil {
		data, err := json.Marshal(body)
		if err != nil {
			return nil, fmt.Errorf("marshal body: %w", err)
		}
		reqBody = bytes.NewReader(data)
	}

	req, err := http.NewRequest(method, baseURL+path, reqBody)
	if err != nil {
		return nil, fmt.Errorf("new request: %w", err)
	}

	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-Metabase-Session", token)

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("http %s %s: %w", method, path, err)
	}
	defer resp.Body.Close()

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

	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		return nil, fmt.Errorf("metabase %s %s: status %d: %s", method, path, resp.StatusCode, string(respBody))
	}

	if len(respBody) == 0 {
		return nil, nil
	}

	var result []map[string]any
	if err := json.Unmarshal(respBody, &result); err != nil {
		return nil, fmt.Errorf("unmarshal response: %w", err)
	}

	return result, nil
}