// Copyright (c) EZSCALE.
// SPDX-License-Identifier: MPL-2.0

package client

import (
	"fmt"
	"net/http"
	"net/url"
	"strings"
	"time"
)

// Client is the VirtFusion API client.
type Client struct {
	BaseURL    string
	Token      string
	HTTPClient *http.Client
}

// New creates a new VirtFusion API client.
// The endpoint can be a hostname (e.g. "cp.example.com") or a full URL
// (e.g. "https://cp.example.com" or "https://cp.example.com/api/v1").
func New(endpoint, token string) (*Client, error) {
	if endpoint == "" {
		return nil, fmt.Errorf("endpoint is required")
	}
	if token == "" {
		return nil, fmt.Errorf("api_token is required")
	}

	baseURL := normalizeEndpoint(endpoint)

	return &Client{
		BaseURL: baseURL,
		Token:   token,
		HTTPClient: &http.Client{
			Timeout: 60 * time.Second,
		},
	}, nil
}

// normalizeEndpoint takes a user-provided endpoint and returns a full base URL
// ending with /api/v1. Supports:
//   - "cp.example.com" → "https://cp.example.com/api/v1"
//   - "https://cp.example.com" → "https://cp.example.com/api/v1"
//   - "https://cp.example.com/api/v1" → "https://cp.example.com/api/v1"
func normalizeEndpoint(endpoint string) string {
	endpoint = strings.TrimRight(endpoint, "/")

	// If no scheme, add https://
	if !strings.Contains(endpoint, "://") {
		endpoint = "https://" + endpoint
	}

	// Parse to validate
	u, err := url.Parse(endpoint)
	if err != nil {
		// Fall back to simple construction
		return endpoint + "/api/v1"
	}

	// If path already ends with /api/v1, use as-is
	if strings.HasSuffix(u.Path, "/api/v1") {
		return u.String()
	}

	// Otherwise append /api/v1
	u.Path = strings.TrimRight(u.Path, "/") + "/api/v1"
	return u.String()
}