"use client";
import baseRequest from "./baseRequest";
import CryptoJS from "crypto-js";
import { Toast } from "antd-mobile";
import { generateSignature } from "@/utils/crypto";
import { generateVideoThumbnails } from "@rajesh896/video-thumbnails-generator";
//获取auth
async function getAuth(mtype) {
  const base = baseRequest();
  const signature = generateSignature({
    mtype: mtype,
    ...base,
  });
  try {
    const response = await fetch(`/api/media/auth?signature=${signature}`, {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        mtype: mtype,
        ...base,
      }),
    });
    const data = await response.json();
    if (data.ret === -1) {
      Toast.show({
        content: data.msg,
      });
      return;
    }
    return data.data.policy_token;
  } catch (error) {
    // console.error(error);
  }
}

//计算媒体参数
async function calculateFileMetadata(file) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = (event) => {
      try {
        const fileData = event.target.result;
        const wordArray = CryptoJS.lib.WordArray.create(fileData);
        const md5Hash = CryptoJS.MD5(wordArray).toString();
        if (typeof window == "undefined") return;
        const mediaElement = document.createElement(
          file.type.indexOf("image/") != -1 ? "img" : "video"
        );
        mediaElement.src = URL.createObjectURL(file);

        mediaElement.addEventListener(
          file.type.indexOf("image/") != -1 ? "load" : "loadedmetadata",
          () => {
            const metadata = {
              md5Hash,
              width: mediaElement.width || 0,
              height: mediaElement.height || 0,
              duration: mediaElement.duration || 0,
            };

            resolve(metadata);
          }
        );

        mediaElement.addEventListener("error", () => {
          const metadata = {
            md5Hash,
            width: 0,
            height: 0,
            duration: 0,
          };

          resolve(metadata);
        });
      } catch (error) {
        reject(error);
      }
    };

    reader.onerror = (error) => {
      reject(error);
    };

    file.type?.indexOf("image/") != -1
      ? reader.readAsDataURL(file)
      : reader.readAsArrayBuffer(file);
  });
}

//计算视频封面参数
async function calculateCoverMetadata(file) {
  return new Promise((resolve, reject) => {
    try {
      const pureBase64String = file.replace(
        /^data:image\/(png|jpg|jpeg|gif);base64,/,
        ""
      );
      const binaryString = atob(pureBase64String);
      const binaryData = new Uint8Array(binaryString.length);

      for (let i = 0; i < binaryString.length; i++) {
        binaryData[i] = binaryString.charCodeAt(i);
      }

      const wordArray = CryptoJS.lib.WordArray.create(binaryData);
      const md5Hash = CryptoJS.MD5(wordArray).toString();

      const image = new Image();
      image.src = `data:image/jpeg;base64,${pureBase64String}`;

      image.onload = () => {
        const metadata = {
          md5Hash,
          width: image.width || 0,
          height: image.height || 0,
          duration: image.duration || 0,
        };

        resolve(metadata);
      };

      image.onerror = () => {
        const metadata = {
          md5Hash,
          width: 0,
          height: 0,
        };

        resolve(metadata);
      };
    } catch (error) {
      reject(error);
    }
  });
}

function atob(base64) {
  var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
  var o1,
    o2,
    o3,
    h1,
    h2,
    h3,
    h4,
    bits,
    i = 0,
    ac = 0,
    dec = "",
    tmp_arr = [];

  if (!base64) {
    return base64;
  }

  base64 += "";

  do {
    // unpack four hexets into three bytes using index points in b64
    h1 = b64.indexOf(base64.charAt(i++));
    h2 = b64.indexOf(base64.charAt(i++));
    h3 = b64.indexOf(base64.charAt(i++));
    h4 = b64.indexOf(base64.charAt(i++));

    bits = (h1 << 18) | (h2 << 12) | (h3 << 6) | h4;

    o1 = (bits >> 16) & 0xff;
    o2 = (bits >> 8) & 0xff;
    o3 = bits & 0xff;

    if (h3 == 64) {
      tmp_arr[ac++] = String.fromCharCode(o1);
    } else if (h4 == 64) {
      tmp_arr[ac++] = String.fromCharCode(o1, o2);
    } else {
      tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
    }
  } while (i < base64.length);

  dec = tmp_arr.join("");
  return dec;
}
//获取上传失败时返回的id
async function getFailId() {
  const base = await baseRequest();
  const signature = await generateSignature({
    ...base,
  });
  try {
    const response = await fetch(
      `/api/upload_media_fail_config/list?signature=${signature}`,
      {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          ...base,
        }),
      }
    );
    const data = await response.json();
    if (data.ret === -1) {
      Toast.show({
        icon: "fail",
        content: data.msg,
        position: "top",
      });
      return;
    }
    return data.data;
  } catch (e) {
    // console.warn(e);
  }
}

//上传单张图片
export async function uploadImage(asset, h, w) {
  const auth = await getAuth(1);
  try {
    const formData = new FormData();
    formData.append("name", auth.filename);
    formData.append("policy", auth.policy);
    formData.append("OSSAccessKeyId", auth.access_key_id);
    formData.append("success_action_status", "200");
    formData.append("signature", auth.signature);
    formData.append("key", auth.directory + "/" + auth.filename);
    formData.append("file", asset);
    const uploadResponse = await fetch(auth.host, {
      method: "POST",
      body: formData,
    });
    if (uploadResponse.status === 200) {
      const info = await calculateFileMetadata(asset);
      const item = {
        src_id: auth.directory + "/" + auth.filename,
        md5: info.md5Hash,
        h: h || info.height,
        w: h || info.height,
        fmt: asset.type,
      };
      const base = baseRequest();
      const response = await fetch(`/api/media/c_upload`, {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          mtype: 1,
          item: item,
          ...base,
        }),
      });
      const data = await response.json();
      if (data.ret === -1) {
        Toast.show({
          content: data.msg,
        });
        return;
      }
      return data.data.ret_item.id;
    } else {
      Toast.show({
        content: "上传图片失败",
      });
    }
  } catch (error) {
    // console.log("Error occurred while getting or uploading data:", error);
  }
}
//上传视频封面
export async function uploadVideoCover(asset) {
  const auth = await getAuth(1);
  function base64toFile(base64Data) {
    //去掉base64的头部信息，并转换为byte
    let split = base64Data.split(",");
    let bytes = window.atob(split[1]);
    //获取文件类型
    let fileType = split[0].match(/:(.*?);/)[1];
    //处理异常,将ascii码小于0的转换为大于0
    let ab = new ArrayBuffer(bytes.length);
    let ia = new Uint8Array(ab);
    for (let i = 0; i < bytes.length; i++) {
      ia[i] = bytes.charCodeAt(i);
    }
    return new Blob([ab], { type: fileType });
  }
  const cover = await generateVideoThumbnails(asset, 1);
  const blobFile = base64toFile(cover[0]);
  try {
    const formData = new FormData();
    formData.append("name", auth.filename);
    formData.append("policy", auth.policy);
    formData.append("OSSAccessKeyId", auth.access_key_id);
    formData.append("success_action_status", "200");
    formData.append("signature", auth.signature);
    formData.append("key", auth.directory + "/" + auth.filename);
    formData.append("file", blobFile);

    const uploadResponse = await fetch(auth.host, {
      method: "POST",
      body: formData,
    });

    if (uploadResponse.status === 200) {
      const info = await calculateCoverMetadata(cover[0]);
      const item = {
        src_id: auth.directory + "/" + auth.filename,
        md5: info.md5Hash,
        h: info.height,
        w: info.width,
        fmt: blobFile.type,
      };
      const base = baseRequest();
      const response = await fetch("/api/media/c_upload", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          mtype: 1,
          item: item,
          ...base,
        }),
      });
      const data = await response.json();
      if (data.ret === -1) {
        alert(data.msg);
        return;
      }
      return data.data.ret_item.id;
    } else {
      alert("上传图片失败");
    }
  } catch (error) {
    // console.log("Error occurred while getting or uploading data:", error);
  }
}
//上传单个视频
export async function uploadVideo(asset) {
  const auth = await getAuth(2);
  try {
    const formData = new FormData();
    formData.append("name", auth.filename);
    formData.append("policy", auth.policy);
    formData.append("OSSAccessKeyId", auth.access_key_id);
    formData.append("success_action_status", "200");
    formData.append("signature", auth.signature);
    formData.append("key", auth.directory + "/" + auth.filename);
    formData.append("file", asset);
    const uploadResponse = await fetch(auth.host, {
      method: "POST",
      body: formData,
    });

    if (uploadResponse.status === 200) {
      const videoCoverId = await uploadVideoCover(asset);
      const info = await calculateFileMetadata(asset);
      const item = {
        src_id: auth.directory + "/" + auth.filename,
        cover_id: videoCoverId,
        md5: info.md5Hash,
        fmt: asset?.type,
        dur: info?.duration,
      };
      const base = baseRequest();
      const response = await fetch(`/api/media/c_upload`, {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          mtype: 2,
          item: item,
          ...base,
        }),
      });
      const data = await response.json();
      if (data.ret === -1) {
        Toast.show({
          icon: "fail",
          content: data.msg,
          position: "top",
        });
        return;
      }
      return data.data.ret_item.id;
    } else {
      Toast.show({
        icon: "fail",
        content: "上传视频失败",
        position: "top",
      });
      const failId = await getFailId();
      return failId?.video_id_for_upload_fail;
    }
  } catch (error) {
    // console.log("Error occurred while getting or uploading data:", error);
    Toast.show({
      icon: "fail",
      content: "上传视频失败",
      position: "top",
    });
    const failId = await getFailId();
    return failId?.video_id_for_upload_fail;
  }
}

//上传多个图片
export async function multiUploadImage(assets, type) {
  let ids = { image_ids: [], video_ids: [] };
  await Promise.all(
    assets.map(async (asset) => {
      if (type == 1) {
        const id = await uploadImage(asset);
        ids.image_ids.push(id);
      } else {
        const id = await uploadVideo(asset);
        id && ids.video_ids.push(id);
      }
    })
  );
  return ids;
}