package js

import (
	"github.com/dop251/goja"
	"github.com/ssgo/httpclient"
	"github.com/ssgo/u"
)

type Http struct {
	client *httpclient.ClientPool
}

var defaultHttp = &Http{
	client: httpclient.GetClient(0),
}

var h2cHttp = &Http{
	client: httpclient.GetClientH2C(0),
}

func RequireHTTP() map[string]any {
	return map[string]any{
		"get":        defaultHttp.Get,
		"get2C":      h2cHttp.Get,
		"head":       defaultHttp.Head,
		"head2C":     h2cHttp.Head,
		"post":       defaultHttp.Post,
		"post2C":     h2cHttp.Post,
		"put":        defaultHttp.Put,
		"put2C":      h2cHttp.Put,
		"delete":     defaultHttp.Delete,
		"delete2C":   h2cHttp.Delete,
		"do":         defaultHttp.Do,
		"do2C":       h2cHttp.Do,
		"upload":     defaultHttp.Upload,
		"upload2C":   h2cHttp.Upload,
		"download":   defaultHttp.Download,
		"download2C": h2cHttp.Download,
	}
}

func makeResult(r *httpclient.Result, vm *goja.Runtime) goja.Value {
	if r.Error != nil {
		return vm.NewGoError(r.Error)
	}
	headers := map[string]string{}
	for k, v := range r.Response.Header {
		headers[k] = v[0]
	}
	return vm.ToValue(map[string]any{
		"status":     r.Response.Status,
		"statusCode": r.Response.StatusCode,
		"headers":    headers,
		"data":       r.Map(),
		"result":     r.String(),
	})
}

func (hc *Http) Get(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(1); err != nil {
		return err
	}
	return makeResult(hc.client.Get(args.Str(0), args.Map2StrArr(1)...), vm)
}

func (hc *Http) Head(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(1); err != nil {
		return err
	}
	return makeResult(hc.client.Head(args.Str(0), args.Map2StrArr(1)...), vm)
}

func (hc *Http) Post(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(2); err != nil {
		return err
	}
	return makeResult(hc.client.Post(args.Str(0), args.Any(1), args.Map2StrArr(2)...), vm)
}

func (hc *Http) Put(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(2); err != nil {
		return err
	}
	return makeResult(hc.client.Put(args.Str(0), args.Any(1), args.Map2StrArr(2)...), vm)
}

func (hc *Http) Delete(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(2); err != nil {
		return err
	}
	return makeResult(hc.client.Delete(args.Str(0), args.Any(1), args.Map2StrArr(2)...), vm)
}

func (hc *Http) Do(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(3); err != nil {
		return err
	}
	if len(argsIn.Arguments) == 3 {
		argsIn.Arguments = append(argsIn.Arguments, vm.ToValue(nil))
	}
	var r *httpclient.Result
	if cb, ok := goja.AssertFunction(argsIn.Arguments[3]); ok {
		r = hc.client.ManualDo(args.Str(0), args.Str(1), args.Any(2), args.Map2StrArr(4)...)
		buf := make([]byte, 1024)
		for {
			n, err := r.Response.Body.Read(buf)
			if err != nil {
				break
			}
			_, _ = cb(argsIn.This, vm.ToValue(u.String(buf[0:n])))
		}
	} else {
		r = hc.client.Do(args.Str(0), args.Str(1), args.Any(2), args.Map2StrArr(4)...)
	}
	return makeResult(r, vm)
}

func (hc *Http) Upload(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(2); err != nil {
		return err
	}
	postData := map[string]string{}
	postFiles := map[string]any{}
	u.Convert(args.Any(1), &postData)
	if len(argsIn.Arguments) > 2 {
		u.Convert(args.Any(2), &postFiles)
	}
	r, _ := hc.client.MPost(args.Str(0), postData, postFiles, args.Map2StrArr(3)...)
	return makeResult(r, vm)
}

func (hc *Http) Download(argsIn goja.FunctionCall, vm *goja.Runtime) goja.Value {
	args := MakeArgs(&argsIn, vm)
	if err := args.Check(2); err != nil {
		return err
	}
	var r *httpclient.Result
	var callback goja.Callable
	if len(argsIn.Arguments) > 2 {
		if cb, ok := goja.AssertFunction(argsIn.Arguments[2]); ok {
			callback = cb
		}
	}
	if callback != nil {
		r, _ = hc.client.Download(args.Str(0), args.Str(1), func(start, end int64, ok bool, finished, total int64) {
			_, _ = callback(argsIn.This, vm.ToValue(finished), vm.ToValue(total))
		}, args.Map2StrArr(3)...)
	} else {
		r, _ = hc.client.Download(args.Str(0), args.Str(1), nil, args.Map2StrArr(3)...)
	}
	return makeResult(r, vm)
}