package service

import (
	"archive/zip"
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"fyne.io/fyne/v2/data/binding"
	"github.com/gin-gonic/gin"
	"io"
	"net/http"
	"os"
	"path/filepath"
	"time"
	"work_cation/cfg"
	"work_cation/global"
	"work_cation/models"
	"work_cation/repo"
)

type ClientService struct {
}

var Client = &ClientService{}

func (c *ClientService) GetUser(online *models.Online) (*models.Users, error) {
	var user models.Users
	ctx, carnal := context.WithTimeout(context.TODO(), time.Millisecond*500)
	defer carnal()
	res, err := http.NewRequestWithContext(ctx, "", online.Url("/user"), nil)
	if err != nil {
		return nil, err
	}
	resp, err := http.DefaultClient.Do(res)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	data, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, err
	}
	err = json.Unmarshal(data, &user)
	if err != nil {
		return nil, err
	}
	return &user, nil
}

func (c *ClientService) GetCards(online *models.Online) ([]models.BaseCard, error) {
	var cards []models.BaseCard
	ctx, carnal := context.WithTimeout(context.TODO(), time.Millisecond*500)
	defer carnal()
	res, err := http.NewRequestWithContext(ctx, "", online.Url("/cards"), nil)
	if err != nil {
		return nil, err
	}
	resp, err := http.DefaultClient.Do(res)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	data, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, err
	}
	err = json.Unmarshal(data, &cards)
	if err != nil {
		return nil, err
	}
	return cards, nil
}

func (c *ClientService) Download(online *models.Online, uuid string, progress binding.Float) error {

	resp, err := http.Get(online.Url("/download/card/" + uuid))
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	downloadFile := filepath.Join(cfg.T.CardDir, fmt.Sprintf("%s.zip", uuid))
	_, err = os.Stat(downloadFile)
	if err == nil {
		os.RemoveAll(downloadFile)
	}

	file, err := os.Create(downloadFile)
	if err != nil {
		return err
	}

	r := Rr{
		file:         file,
		tot:          resp.ContentLength,
		progress:     0,
		oneUp:        0,
		progressBind: progress,
	}

	_, err = io.Copy(&r, resp.Body)
	file.Close()
	if err != nil {
		return err
	}
	// 解压
	destDir := filepath.Join(cfg.T.CardDir, uuid)
	_ = os.RemoveAll(destDir)
	if err = unzipFile(downloadFile, destDir); err != nil {
		return err
	}
	_ = os.RemoveAll(downloadFile)
	return nil
}

func (c *ClientService) Chat(online *models.Online, text string) (string, error) {
	var user = repo.User.GetUserInfo(global.DB)
	ctx, carnal := context.WithTimeout(context.TODO(), time.Millisecond*500)
	defer carnal()
	b, err := json.Marshal(gin.H{"text": text, "uuid": user.ID})
	if err != nil {
		return "", err
	}
	res, err := http.NewRequestWithContext(ctx, "POST", online.Url("/chat"), bytes.NewBuffer(b))
	if err != nil {
		return "", err
	}
	res.Header.Set("Content-Type", "application/json")
	res.Header.Set("User-ID", user.ID)
	resp, err := http.DefaultClient.Do(res)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()
	data, err := io.ReadAll(resp.Body)
	var msg = make(map[string]any)
	if err = json.Unmarshal(data, &msg); err != nil {
		return "", err
	}
	return msg["message"].(string), err
}

type Rr struct {
	file     *os.File
	tot      int64
	progress int64

	oneUp        int
	progressBind binding.Float
}

func (r *Rr) Write(p []byte) (n int, err error) {
	n, err = r.file.Write(p)
	if err != nil {
		return
	}
	r.progress += int64(n)

	nowUp := int(r.progress * 100 / r.tot)
	if nowUp != r.oneUp {
		r.progressBind.Set(float64(nowUp))
		r.oneUp = nowUp
	}
	return
}

func unzipFile(zipFile, destDir string) error {
	// 打开ZIP文件
	r, err := zip.OpenReader(zipFile)
	if err != nil {
		return err
	}
	defer r.Close()
	// 创建目标目录
	err = os.MkdirAll(destDir, os.ModePerm)
	if err != nil {
		return err
	}
	// 遍历ZIP文件中的文件并解压缩到目标目录
	for _, f := range r.File {
		rc, err := f.Open()
		if err != nil {
			return err
		}
		// 创建文件
		path := filepath.Join(destDir, f.Name)
		if f.FileInfo().IsDir() {
			os.MkdirAll(path, os.ModePerm)
		} else {
			// 创建文件
			file, err := os.Create(path)
			if err != nil {
				return err
			}
			_, err = io.Copy(file, rc)
			if err != nil {
				return err
			}
			file.Close()
		}
		rc.Close()
	}

	return nil
}