"use strict";
const lod = require("lodash");
const utils = require("@strapi/utils");
const { concat, compact, isArray, toNumber, getOr } = require("lodash/fp");
const cryptoLib = require("crypto");
const bcrypt = require("bcryptjs");
const fs = require("fs").promises;
const path = require("path");

module.exports = (plugin) => {
  const rawProviders = plugin.services.providers({ strapi });
  const { ApplicationError, ValidationError, ForbiddenError } = utils.errors;
  const USER_MODEL_UID = "plugin::users-permissions.user";

  const sanitizeUser = (user, ctx) => {
    const { auth } = ctx.state;
    const userSchema = strapi.getModel("plugin::users-permissions.user");

    return strapi.contentAPI.sanitize.output(user, userSchema, { auth });
  };

  const ensureHashedPasswords = async (values) => {
    const attributes = strapi.getModel(USER_MODEL_UID).attributes;

    for (const key in values) {
      if (attributes[key] && attributes[key].type === "password") {
        // Check if a custom encryption.rounds has been set on the password attribute
        const rounds = toNumber(
          getOr(10, "encryption.rounds", attributes[key])
        );
        values[key] = await bcrypt.hash(values[key], rounds);
      }
    }
    values["confirmed"] = false;
    return values;
  };

  const edit = async (userId, params = {}) => {
    return strapi.db.query(USER_MODEL_UID).update({
      where: { id: userId },
      data: await ensureHashedPasswords(params),
      populate: ["role"],
    });
  };

  const sendConfirmationEmail = async (user) => {
    // Génération du token de confirmation

    const templates = await strapi
      .documents("api::mails.mails")
      .findFirst({ populate: "*" });
    //const onCreateUser = templates.onCreateUser;

    const onCreateUser = templates?.onCreateUser;

    const confirmationToken = cryptoLib.randomBytes(20).toString("hex");

    await edit(user.id, { confirmationToken });
    const confirmUrl = `${process.env.NEXTJS_URL}/confirmation/submit?confirmation=${confirmationToken}`;

    // Lecture du template HTML depuis le fichier

    const htmlPath = path.join(process.cwd(), "public", "confirmation.html");
    //let html = await fs.readFile(htmlPath, "utf-8");
    let html = onCreateUser?.message;

    // Remplacement des variables
    html = html
      .replace(/{{USER_NAME}}/g, user.username || user.email)
      .replace(/{{CONFIRM_URL}}/g, confirmUrl)
      .replace(/{{YEAR}}/g, new Date().getFullYear().toString());

    // Envoi de l'e-mail
    await strapi
      .plugin("email")
      .service("email")
      .send({
        to: user.email,
        subject: onCreateUser?.subject ?? "Confirme ton adresse e-mail",
        html,
        from: "ChoralSync <admin@harmonychoral.com>",
      });

    return { ok: true };
  };

  const getService = (name) => {
    return strapi.plugin("users-permissions").service(name);
  };

  const getProfile = async (provider, query) => {
    const accessToken = query.access_token || query.code || query.oauth_token;

    const providers = await strapi
      .store({ type: "plugin", name: "users-permissions", key: "grant" })
      .get();

    return getService("providers-registry").run({
      provider,
      query,
      accessToken,
      providers,
    });
  };

  const providers = ({ strapi }) => {
    return {
      ...rawProviders,
      connect: async (provider, query) => {
        const accessToken =
          query.access_token || query.code || query.oauth_token;

        if (!accessToken) {
          throw new Error("No access_token.");
        }

        const profile = await getProfile(provider, query);

        const email = lod.toLower(profile.email);

        if (!email) {
          throw new Error("Email was not available.");
        }

        const users = await strapi.db
          .query("plugin::users-permissions.user")
          .findMany({
            where: { email },
          });

        const advancedSettings = (await strapi
          .store({ type: "plugin", name: "users-permissions", key: "advanced" })
          .get()) as {
          allow_register: boolean;
          unique_email?: boolean;
          default_role?: string;
        };

        let user = lod.find(users, { provider });
        if (lod.isEmpty(user)) {
          user = lod.find(users);
        }

        if (lod.isEmpty(user) && !advancedSettings.allow_register) {
          throw new Error("Register action is actually not available.");
        }

        if (!lod.isEmpty(user)) {
          return user;
        }

        if (users.length && advancedSettings.unique_email) {
          throw new Error("Email is already taken.");
        }

        const defaultRole = await strapi.db
          .query("plugin::users-permissions.role")
          .findOne({ where: { type: advancedSettings.default_role } });

        const newUser = {
          ...profile,
          email,
          provider,
          role: defaultRole.id,
          confirmed: true,
        };

        const createdUser = await strapi.db
          .query("plugin::users-permissions.user")
          .create({ data: newUser });

        return createdUser;
      },
    };
  };

  const originalMe = plugin.controllers.user.me;

  plugin.controllers.user.me = async (ctx) => {
    const fullUser = await strapi.db
      .query("plugin::users-permissions.user")
      .findOne({
        where: { id: ctx.state.user.id },
        populate: true,
      });

    if (fullUser.contacts && Array.isArray(fullUser.contacts)) {
      fullUser.contacts = fullUser.contacts.filter(
        (contact) => contact.state === "accepted"
      );
    }

    if (fullUser.post_ownerships && Array.isArray(fullUser.post_ownerships)) {
      fullUser.post_ownerships = fullUser.post_ownerships.filter(
        (ownership) =>
          ownership.contextType === "user" && ownership.relation === "owner"
      );
    }

    if (
      fullUser.group_memberships &&
      Array.isArray(fullUser.group_memberships)
    ) {
      fullUser.group_memberships = fullUser.group_memberships.filter(
        (membership) => ["member", "admin", "owner"].includes(membership.role)
      );
    }

    const user = ctx.state.user;

    const userId = user.id;

    const [
      contactsCount,
      groupsCount,
      postsCount,
      eventsCount,
      followersCount,
      followingCount,
    ] = await Promise.all([
      strapi.db.query("api::contact.contact").count({
        where: {
          $or: [{ owner: userId }, { user: userId }],
        },
      }),
      strapi.db.query("api::group-membership.group-membership").count({
        where: {
          user: userId,
          role: { $in: ["owner", "member", "admin"] },
        },
      }),
      strapi.db
        .query("api::post-ownership.post-ownership")
        .count({ where: { author: userId } }),
      strapi.db
        .query("api::event-relationship.event-relationship")
        .count({ where: { author: userId } }),
      strapi.db.query("api::contact.contact").count({
        where: {
          user: userId,
          state: "follow",
        },
      }),
      strapi.db.query("api::contact.contact").count({
        where: {
          owner: userId,
          state: "follow",
        },
      }),
    ]);
    const result = {
      ...JSON.parse(JSON.stringify(fullUser)),
      stats: {
        contacts: contactsCount,
        groups: groupsCount,
        posts: postsCount,
        events: eventsCount,
        followers: followersCount,
        following: followingCount,
      },
    };

    return result;
  };

  const originalFindOne = plugin.controllers.user.findOne;

  plugin.controllers.user.findOne = async (ctx) => {
    // 1️⃣ Appel du controller d'origine (permissions, policies)
    await originalFindOne(ctx);

    // 2️⃣ Récupère l'utilisateur renvoyé
    let user = ctx.body;

    if (!user) {
      return ctx.notFound("User not found");
    }

    // 4️⃣ Ajoute un champ calculé
    user.profileCompleted = Boolean(user.username && user.surname);

    // 3️⃣ Supprime les champs sensibles
    const sensitive = ["password", "resetPasswordToken", "confirmationToken"];
    sensitive.forEach((key) => delete user[key]); //post_ownerships

    // 5️⃣ Refetch avec relations peuplées
    try {
      const populatedUser = await strapi.entityService.findOne(
        "plugin::users-permissions.user",
        user.id,
        {
          populate: {
            post_ownerships: {
              populate: {
                post: {
                  populate: {
                    media: true,
                  },
                },
              },
            },
            contacts: {
              populate: {
                owner: {
                  populate: {
                    avatar: true,
                  },
                },
                user: {
                  populate: {
                    avatar: true,
                  },
                },
              },
            },
            group_memberships: {
              populate: {
                group: {
                  populate: {
                    banner: true,
                  },
                },
              },
            },
            activities: true,
          },
        }
      );
      // Fusionne les données originales (permissions/serialization) avec les relations
      user = { ...user, ...populatedUser };

      if (user.contacts && Array.isArray(user.contacts)) {
        user.contacts = user.contacts.filter(
          (contact) => contact.state === "accepted"
        );
      }

      if (user.post_ownerships && Array.isArray(user.post_ownerships)) {
        user.post_ownerships = user.post_ownerships.filter(
          (ownership) =>
            ownership.contextType === "user" && ownership.relation === "owner"
        );
      }

      if (user.group_memberships && Array.isArray(user.group_memberships)) {
        user.group_memberships = user.group_memberships.filter((membership) =>
          ["member", "admin", "owner"].includes(membership.role)
        );
      }

      const eventRelationships = await strapi.db
        .query("api::event-relationship.event-relationship")
        .findMany({
          where: { author: user.id, relation: "owner", contextType: "user" },
          populate: {
            event: true,
          },
        });
      user.event_relationships = eventRelationships || [];
      const [
        contactsCount,
        groupsCount,
        postsCount,
        eventsCount,
        followersCount,
        followingCount,
      ] = await Promise.all([
        strapi.db.query("api::contact.contact").count({
          where: {
            $or: [{ owner: user.id }, { user: user.id }],
          },
        }),
        strapi.db.query("api::group-membership.group-membership").count({
          where: {
            user: user.id,
            role: { $in: ["owner", "member", "admin"] },
          },
        }),
        strapi.db
          .query("api::post-ownership.post-ownership")
          .count({ where: { author: user.id } }),
        strapi.db
          .query("api::event-relationship.event-relationship")
          .count({ where: { author: user.id } }),
        strapi.db.query("api::contact.contact").count({
          where: {
            user: user.id,
            state: "follow",
          },
        }),
        strapi.db.query("api::contact.contact").count({
          where: {
            owner: user.id,
            state: "follow",
          },
        }),
      ]);
      user.stats = {
        contacts: contactsCount,
        groups: groupsCount,
        posts: postsCount,
        events: eventsCount,
        followers: followersCount,
        following: followingCount,
      };
    } catch (err) {
      console.error("Erreur populate relations user:", err);
      // fallback : retourne juste l'utilisateur original
    }
    ctx.body = user;
    return ctx;
  };

  const uploadImage = async (ctx, label: string, username: string) => {
    const key = `${label}Image`;
    if (ctx.request.files[key]) {
      const files = Array.isArray(ctx.request.files[key])
        ? ctx.request.files[key][0]
        : ctx.request.files[key];
      const extension = files.originalFilename.match(/\.[0-9a-z]+$/i);
      const payload = {
        fileInfo: {
          caption: "undefined",
          alternativeText: username || "",
          name: `${username}_avatar${extension}`,
        },
      };
      const asset = await strapi.services["plugin::upload.upload"].upload({
        data: payload,
        files,
      });
      return asset[0].id;
    }

    return 0;
  };

  plugin.services.providers = providers;

  plugin.controllers.user.updateMe = async (ctx) => {
    const user = ctx.state.user;

    if (!user) {
      return ctx.unauthorized();
    }

    const data = JSON.parse(ctx.request.body.data);

    const newData = lod.pick(data, [
      "email",
      "username",
      "name",
      "surname",
      "address",
      "gender",
      "voice",
      "job",
      "dob",
      "phone",
      "bio",
      "experience",
      "tags",
      "languages",
      "parameter",
      "privacy",
    ]);

    /*
    if (data.tags) {
      newData.tags = data.tags.map((tag) => ({
        __component: "social.tags",
        text: tag.text,
      }));
    }

    if (data.languages) {
      newData.languages = data.languages.map((lang) => ({
        __component: "user.language",
        language: lang.language,
        level: lang.level,
      }));
    }*/

    if (newData.username) {
      const userWithSameUsername = await strapi
        .query("plugin::users-permissions.user")
        .findOne({ where: { username: newData.username } });

      if (userWithSameUsername && userWithSameUsername.id != user.id) {
        return ctx.badRequest("Username already taken");
      }
    }

    if (newData.email) {
      const userWithSameEmail = await strapi
        .query("plugin::users-permissions.user")
        .findOne({ where: { email: newData.email.toLowerCase() } });

      if (userWithSameEmail && userWithSameEmail.id != user.id) {
        return ctx.badRequest("Email already taken");
      }
      newData.email = newData.email.toLowerCase();
    }

    ctx.request.body = newData;
    ctx.params = { id: user.id };

    const keysExcludingParameterAndPrivacy = Object.keys(newData).filter(
      (key) => key !== "parameter" && key !== "privacy"
    );

    if (keysExcludingParameterAndPrivacy.length === 0) {
      await strapi.entityService
        .update("plugin::users-permissions.user", user.id, {
          data: newData,
        })
        .then((res) => {
          ctx.response.status = 200;
          ctx.response.body = res;
          return ctx;
        });
    } else {
      const avatarId = await uploadImage(ctx, "avatar", newData.username);
      if (avatarId != 0) ctx.request.body.avatar = avatarId;

      return plugin.controllers.user.update(ctx);
    }
  };

  plugin.contentTypes.user.lifecycles = {
    async afterCreate(event) {
      const { result } = event;

      await sendConfirmationEmail(result);

      await strapi
        .service("api::notification.notification")
        ?.addActivity({
          userId: result.id,
          activityMessage: `Bienvenue ${result.username}, Ton compte est maintenant activé.`,
          activityUser: result.username,
          activityType: "user",
        });

      // Appel du service de notification
      await strapi
        .service("api::notification.notification")
        ?.createNotification({
          title: "Bienvenue !",
          message: `Ton compte est maintenant activé.`,
          type: "success",
          target_user: result.id,
          source: "system",
          payload: { email: result.email },
        });

      strapi.log.info(
        `🔔 Notification envoyée pour l'utilisateur ${result.id}`
      );
    },
  };

  plugin.routes["content-api"].routes.push({
    method: "PUT",
    path: "/users/me",
    handler: "user.updateMe",
  });

  return plugin;
};