/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

/* global browser, window, document, localStorage */

const CONTAINER_HIDE_SRC = "/img/container-hide.svg";
const CONTAINER_UNHIDE_SRC = "/img/container-unhide.svg";

// Let's set it to false before releasing!!!
const DEBUG = false;

// List of panels
const P_ONBOARDING_1     = "onboarding1";
const P_ONBOARDING_2     = "onboarding2";
const P_CONTAINERS_LIST  = "containersList";
const P_CONTAINERS_EDIT  = "containersEdit";
const P_CONTAINER_INFO   = "containerInfo";
const P_CONTAINER_EDIT   = "containerEdit";
const P_CONTAINER_DELETE = "containerDelete";

function log(...args) {
  if (DEBUG) {
    console.log.call(console, ...args);
  }
}

// This object controls all the panels, identities and many other things.
let Logic = {
  _identities: [],
  _currentIdentity: null,
  _panels: {},

  init() {
    // Retrieve the list of identities.
    browser.runtime.sendMessage({
      method: "queryIdentities"
    })

    .then(identities => {
      this._identities = identities;
    })

    // Routing to the correct panel.
    .then(() => {
      if (localStorage.getItem("onboarded2")) {
        this.showPanel(P_CONTAINERS_LIST);
      } else if (localStorage.getItem("onboarded1")) {
        this.showPanel(P_ONBOARDING_2);
      } else {
        this.showPanel(P_ONBOARDING_1);
      }
    });
  },

  showPanel(panel, currentIdentity = null) {
    // Invalid panel... ?!?
    if (!(panel in this._panels)) {
      throw("Something really bad happened. Unknown panel: " + panel + "\n");
    }

    this._currentIdentity = currentIdentity;

    // Initialize the panel before showing it.
    this._panels[panel].prepare().then(() => {
      for (let panelElement of document.querySelectorAll(".panel")) {
        panelElement.classList.add("hide");
      }
      document.querySelector(this._panels[panel].panelSelector).classList.remove("hide");
    });
  },

  registerPanel(panelName, panelObject) {
    this._panels[panelName] = panelObject;
    panelObject.initialize();
  },

  identities() {
    return this._identities;
  },

  currentIdentity() {
    if (!this._currentIdentity) {
      throw("CurrentIdentity must be set before calling Logic.currentIdentity.");
    }
    return this._currentIdentity;
  },
};

// P_ONBOARDING_1: First page for Onboarding.
// ----------------------------------------------------------------------------

Logic.registerPanel(P_ONBOARDING_1, {
  panelSelector: ".onboarding-panel-1",

  // This method is called when the object is registered.
  initialize() {
    // Let's move to the next panel.
    document.querySelector("#onboarding-next-button").addEventListener("click", () => {
      localStorage.setItem("onboarded1", true);
      Logic.showPanel(P_ONBOARDING_2);
    });
  },

  // This method is called when the panel is shown.
  prepare() {
    return Promise.resolve(null);
  },
});

// P_ONBOARDING_2: Second page for Onboarding.
// ----------------------------------------------------------------------------

Logic.registerPanel(P_ONBOARDING_2, {
  panelSelector: ".onboarding-panel-2",

  // This method is called when the object is registered.
  initialize() {
    // Let's move to the containers list panel.
    document.querySelector("#onboarding-done-button").addEventListener("click", () => {
      localStorage.setItem("onboarded2", true);
      Logic.showPanel(P_CONTAINERS_LIST);
    });
  },

  // This method is called when the panel is shown.
  prepare() {
    return Promise.resolve(null);
  },
});

// P_CONTAINERS_LIST: The list of containers. The main page.
// ----------------------------------------------------------------------------

Logic.registerPanel(P_CONTAINERS_LIST, {
  panelSelector: "#container-panel",

  // This method is called when the object is registered.
  initialize() {
    document.querySelector(".add-container-link").addEventListener("click", () => {
      Logic.showPanel(P_CONTAINER_EDIT, {});
    });

    document.querySelector("#edit-containers-link").addEventListener("click", () => {
      Logic.showPanel(P_CONTAINERS_EDIT);
    });

    document.querySelector("#sort-containers-link").addEventListener("click", () => {
      browser.runtime.sendMessage({
        method: "sortTabs"
      }).then(() => {
        window.close();
      });
    });
  },

  // This method is called when the panel is shown.
  prepare() {
    let fragment = document.createDocumentFragment();

    Logic.identities().forEach(identity => {
      log('identities.forEach');
      let tr = document.createElement("tr");
      fragment.appendChild(tr);
      tr.classList.add("container-panel-row");
      tr.classList.add("clickable");
      tr.setAttribute("data-identity-cookie-store-id", identity.userContextId);
      tr.innerHTML = `
        <td>
          <div class="userContext-icon open-newtab"
            data-identity-icon="${identity.image}"
            data-identity-color="${identity.color}">
          </div>
        </td>
        <td class="open-newtab">${identity.name}</td>
        <td class="info">&gt;</td>`;

      tr.addEventListener("click", e => {
        if (e.target.matches(".open-newtab")) {
          browser.runtime.sendMessage({
            method: "showTabs",
            userContextId: identity.userContextId
          }).then(() => {
            return browser.runtime.sendMessage({
              method: "openTab",
              userContextId: identity.userContextId,
            });
          }).then(() => {
            window.close();
          });
        } else if (e.target.matches(".info")) {
          Logic.showPanel(P_CONTAINER_INFO, identity);
        }
      });
    });

    document.querySelector(".identities-list").innerHTML = "";
    document.querySelector(".identities-list").appendChild(fragment);

    return Promise.resolve();
  },
});

// P_CONTAINER_INFO: More info about a container.
// ----------------------------------------------------------------------------

Logic.registerPanel(P_CONTAINER_INFO, {
  panelSelector: "#container-info-panel",

  // This method is called when the object is registered.
  initialize() {
    document.querySelector("#close-container-info-panel").addEventListener("click", () => {
      Logic.showPanel(P_CONTAINERS_LIST);
    });

    document.querySelector("#container-info-hideorshow").addEventListener("click", e => {
      let identity = Logic.currentIdentity();
      browser.runtime.sendMessage({
        method: identity.hasHiddenTabs ? "showTabs" : "hideTabs",
        userContextId: identity.userContextId
      }).then(() => {
        window.close();
      });
    });

    document.querySelector("#container-info-movetabs").addEventListener("click", e => {
      return browser.runtime.sendMessage({
        method: "moveTabsToWindow",
        userContextId: Logic.currentIdentity().userContextId,
      }).then(() => {
        window.close();
      });
    });
  },

  // This method is called when the panel is shown.
  prepare() {
    let identity = Logic.currentIdentity();

    // Populating the panel: name and icon
    document.getElementById("container-info-name").innerText = identity.name;

    let icon = document.getElementById("container-info-icon");
    icon.setAttribute("data-identity-icon", identity.image);
    icon.setAttribute("data-identity-color", identity.color);

    // Show or not the has-tabs section.
    for (let trHasTabs of document.getElementsByClassName("container-info-has-tabs")) {
      trHasTabs.hidden = !identity.hasHiddenTabs && !identity.hasOpenTabs;
    }

    const hideShowIcon = document.getElementById("container-info-hideorshow-icon");
    hideShowIcon.src = identity.hasHiddenTabs ? CONTAINER_UNHIDE_SRC : CONTAINER_HIDE_SRC;

    const hideShowLabel = document.getElementById("container-info-hideorshow-label");
    hideShowLabel.innerText = identity.hasHiddenTabs ? "Show these container tabs" : "Hide these container tabs";

    // Let's remove all the previous tabs.
    for (let trTab of document.getElementsByClassName("container-info-tab")) {
      trTab.remove();
    }

    // Let's retrieve the list of tabs.
    return browser.runtime.sendMessage({
      method: "getTabs",
      userContextId: identity.userContextId,
    }).then(tabs => {
      log('browser.runtime.sendMessage getTabs, tabs: ', tabs);
      // For each one, let's create a new line.
      let fragment = document.createDocumentFragment();
      for (let tab of tabs) {
        let tr = document.createElement("tr");
        fragment.appendChild(tr);
        tr.classList.add("container-info-tab");
        tr.classList.add("clickable");
        tr.innerHTML = `
          <td><img class="icon" src="${tab.favicon}" /></td>
          <td>${tab.title}</td>`;
        // On click, we activate this tab.
        tr.addEventListener("click", () => {
          browser.runtime.sendMessage({
            method: "showTab",
            tabId: tab.id,
          }).then(() => {
            window.close();
          });
        });
      }

      document.getElementById("container-info-table").appendChild(fragment);
    });
  },
});

// P_CONTAINERS_EDIT: Makes the list editable.
// ----------------------------------------------------------------------------

Logic.registerPanel(P_CONTAINERS_EDIT, {
  panelSelector: "#edit-containers-panel",

  // This method is called when the object is registered.
  initialize() {
    document.querySelector("#exit-edit-mode-link").addEventListener("click", () => {
      Logic.showPanel(P_CONTAINERS_LIST);
    });
  },

  // This method is called when the panel is shown.
  prepare() {
    let fragment = document.createDocumentFragment();
    Logic.identities().forEach(identity => {
      let tr = document.createElement("tr");
      fragment.appendChild(tr);
      tr.setAttribute("data-identity-cookie-store-id", identity.userContextId);
      tr.classList.add("clickable");
      tr.innerHTML = `
        <td>
          <div class="userContext-icon"
            data-identity-icon="${identity.image}"
            data-identity-color="${identity.color}">
          </div>
        </td>
        <td>${identity.name}</td>
        <td class="edit-container">
          <img
            title="Edit ${identity.name} container"
            data-identity-cookie-store-id="${identity.userContextId}"
            id="edit-${identity.userContextId}-container-icon"
            src="/img/container-edit.svg"
            class="icon edit-container-icon" />
        </td>
        <td class="remove-container" >
          <img
            title="Remove ${identity.name} container"
            data-identity-cookie-store-id="${identity.userContextId}"
            id="delete-${identity.userContextId}-container-icon"
            class="icon delete-container-icon"
            src="/img/container-delete.svg"
          />
        </td>`;

      tr.addEventListener("click", e => {
        if (e.target.matches(".edit-container-icon")) {
          Logic.showPanel(P_CONTAINER_EDIT, identity);
        } else if (e.target.matches(".delete-container-icon")) {
          Logic.showPanel(P_CONTAINER_DELETE, identity);
        }
      });
    });

    document.querySelector("#edit-identities-list").innerHTML = "";
    document.querySelector("#edit-identities-list").appendChild(fragment);

    return Promise.resolve(null);
  },
});

// P_CONTAINER_EDIT: Editor for a container.
// ----------------------------------------------------------------------------

Logic.registerPanel(P_CONTAINER_EDIT, {
  panelSelector: "#edit-container-panel",

  // This method is called when the object is registered.
  initialize() {
    document.querySelector("#edit-container-panel-back-arrow").addEventListener("click", () => {
      Logic.showPanel(P_CONTAINERS_EDIT);
    });

    document.querySelector("#edit-container-cancel-link").addEventListener("click", () => {
      Logic.showPanel(P_CONTAINERS_EDIT);
    });
  },

  // This method is called when the panel is shown.
  prepare() {
    let identity = Logic.currentIdentity();
    document.querySelector("#edit-container-panel-name-input").value = identity.name;
    return Promise.resolve(null);
  },
});

// P_CONTAINER_DELETE: Delete a container.
// ----------------------------------------------------------------------------

Logic.registerPanel(P_CONTAINER_DELETE, {
  panelSelector: "#delete-container-panel",

  // This method is called when the object is registered.
  initialize() {
    document.querySelector("#delete-container-cancel-link").addEventListener("click", () => {
      Logic.showPanel(P_CONTAINERS_EDIT);
    });
  },

  // This method is called when the panel is shown.
  prepare() {
    let identity = Logic.currentIdentity();

    // Populating the panel: name and icon
    document.getElementById("delete-container-name").innerText = identity.name;

    let icon = document.getElementById("delete-container-icon");
    icon.setAttribute("data-identity-icon", identity.image);
    icon.setAttribute("data-identity-color", identity.color);

    return Promise.resolve(null);
  },
});

Logic.init();