package cdsapi

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

	v4 "github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	"github.com/aws/aws-sdk-go-v2/credentials"
	"gitlink.org.cn/cloudream/common/sdks"
	"gitlink.org.cn/cloudream/common/utils/http2"
	"gitlink.org.cn/cloudream/common/utils/math2"
	"gitlink.org.cn/cloudream/common/utils/serder"
)

func MakeIPFSFilePath(fileHash string) string {
	return filepath.Join("ipfs", fileHash)
}

func ParseJSONResponse[TBody any](resp *http.Response) (TBody, error) {
	var ret TBody
	contType := resp.Header.Get("Content-Type")
	if strings.Contains(contType, http2.ContentTypeJSON) {
		var err error
		if ret, err = serder.JSONToObjectStreamEx[TBody](resp.Body); err != nil {
			return ret, fmt.Errorf("parsing response: %w", err)
		}

		return ret, nil
	}

	cont, err := io.ReadAll(resp.Body)
	if err != nil {
		return ret, fmt.Errorf("unknow response content type: %s, status: %d", contType, resp.StatusCode)
	}
	strCont := string(cont)

	return ret, fmt.Errorf("unknow response content type: %s, status: %d, body(prefix): %s", contType, resp.StatusCode, strCont[:math2.Min(len(strCont), 200)])
}

func JSONAPI[Resp sdks.APIResponse, Req sdks.APIRequest](cfg *Config, cli *http.Client, req Req) (Resp, error) {
	var re Resp

	param := req.MakeParam()

	httpReq, err := param.MakeRequest(cfg.URL)
	if err != nil {
		return re, err
	}

	if cfg.AccessKey != "" && cfg.SecretKey != "" {
		prod := credentials.NewStaticCredentialsProvider(cfg.AccessKey, cfg.SecretKey, "")
		cred, err := prod.Retrieve(context.TODO())
		if err != nil {
			return re, err
		}

		signer := v4.NewSigner()
		err = signer.SignHTTP(context.Background(), cred, httpReq, "", AuthService, AuthRegion, time.Now())
		if err != nil {
			return re, err
		}
	}

	resp, err := cli.Do(httpReq)
	if err != nil {
		return re, err
	}

	err = re.ParseResponse(resp)
	return re, err
}

func JSONAPINoData[Resp sdks.APIResponse, Req sdks.APIRequest](cfg *Config, cli *http.Client, req Req) error {
	param := req.MakeParam()

	httpReq, err := param.MakeRequest(cfg.URL)
	if err != nil {
		return err
	}

	if cfg.AccessKey != "" && cfg.SecretKey != "" {
		prod := credentials.NewStaticCredentialsProvider(cfg.AccessKey, cfg.SecretKey, "")
		cred, err := prod.Retrieve(context.TODO())
		if err != nil {
			return err
		}

		signer := v4.NewSigner()
		err = signer.SignHTTP(context.Background(), cred, httpReq, "", AuthService, AuthRegion, time.Now())
		if err != nil {
			return err
		}
	}

	resp, err := cli.Do(httpReq)
	if err != nil {
		return err
	}

	return sdks.ParseCodeDataJSONResponse(resp, any(nil))
}