package http

import (
	"context"
	"fmt"
	"io"
	"net/http"
	"strings"
	"time"

	"git.yeij.top/AskaEth/Cyrene-Plugins/sdk"
)

type HTTPPlugin struct {
	sdk.BasePlugin
	client *http.Client
}

func NewHTTPPlugin() *HTTPPlugin {
	return &HTTPPlugin{client: &http.Client{Timeout: 10 * time.Second}}
}

func (p *HTTPPlugin) Metadata() sdk.PluginMetadata {
	return sdk.PluginMetadata{
		Name: "http", DisplayName: "HTTP Client", Version: "1.0.0",
		Description: "Send arbitrary HTTP requests with custom methods, headers, body",
		Category: "network", Author: sdk.PluginAuthor{Name: "Cyrene Team"},
	}
}

func (p *HTTPPlugin) Tools() []sdk.Tool { return []sdk.Tool{&HTTPTool{client: p.client}} }

type HTTPTool struct {
	sdk.BaseTool
	client *http.Client
}

func (t *HTTPTool) Definition() sdk.ToolDefinition {
	return sdk.ToolDefinition{
		ID: "http_request", Name: "http_request", DisplayName: "HTTP Client",
		Description: "Send arbitrary HTTP requests. Supports custom methods, headers, and body.",
		Category: "network", Complexity: sdk.ComplexitySimple,
		DangerLevel: "low",
		Parameters: map[string]interface{}{
			"type": "object",
			"properties": map[string]interface{}{
				"url":     map[string]interface{}{"type": "string"},
				"method":  map[string]interface{}{"type": "string", "enum": []string{"GET", "POST", "PUT", "DELETE", "PATCH", "HEAD", "OPTIONS"}},
				"headers": map[string]interface{}{"type": "object"},
				"body":    map[string]interface{}{"type": "string"},
				"timeout": map[string]interface{}{"type": "number"},
			},
			"required": []string{"url"},
		},
	}
}

var allowedMethods = map[string]bool{
	"GET": true, "POST": true, "PUT": true, "DELETE": true,
	"PATCH": true, "HEAD": true, "OPTIONS": true,
}

func (t *HTTPTool) Validate(args map[string]interface{}) error {
	if _, ok := args["url"]; !ok {
		return fmt.Errorf("missing required parameter: url")
	}
	return nil
}

func (t *HTTPTool) Execute(_ context.Context, args map[string]interface{}) (*sdk.ToolResult, error) {
	urlStr, _ := args["url"].(string)
	method, _ := args["method"].(string)
	if method == "" {
		method = "GET"
	}
	if !allowedMethods[method] {
		return &sdk.ToolResult{ToolName: "http_request", Success: false, Error: "invalid method: " + method}, nil
	}
	if !strings.HasPrefix(urlStr, "http://") && !strings.HasPrefix(urlStr, "https://") {
		return &sdk.ToolResult{ToolName: "http_request", Success: false, Error: "only http/https URLs allowed"}, nil
	}

	var bodyReader io.Reader
	if body, _ := args["body"].(string); body != "" {
		bodyReader = strings.NewReader(body)
	}

	req, err := http.NewRequest(method, urlStr, bodyReader)
	if err != nil {
		return &sdk.ToolResult{ToolName: "http_request", Success: false, Error: err.Error()}, nil
	}
	req.Header.Set("User-Agent", "CyreneBot/1.0")

	if headers, ok := args["headers"].(map[string]interface{}); ok {
		for k, v := range headers {
			req.Header.Set(k, fmt.Sprint(v))
		}
	}

	client := t.client
	if timeout, _ := args["timeout"].(float64); timeout > 0 {
		client = &http.Client{Timeout: time.Duration(timeout) * time.Second}
	}

	resp, err := client.Do(req)
	if err != nil {
		return &sdk.ToolResult{ToolName: "http_request", Success: false, Error: err.Error()}, nil
	}
	defer resp.Body.Close()

	bodyBytes, _ := io.ReadAll(io.LimitReader(resp.Body, 50*1024))
	return &sdk.ToolResult{ToolName: "http_request", Success: resp.StatusCode < 500, Output: fmt.Sprintf(
		"HTTP %d\n%s\n\n%s", resp.StatusCode, formatHeaders(resp.Header), string(bodyBytes))}, nil
}

func formatHeaders(h http.Header) string {
	var lines []string
	for k, v := range h {
		lines = append(lines, fmt.Sprintf("%s: %s", k, strings.Join(v, ", ")))
	}
	return strings.Join(lines, "\n")
}