import { ipcMain, shell, dialog, app, session, clipboard } from "electron"
import { WindowManager } from "./window"
import fs = require("fs")
import { ImageCallbackTypes, TouchBarTexts } from "../schema-types"
import { initMainTouchBar } from "./touchbar"
import fontList = require("font-list")

export function setUtilsListeners(manager: WindowManager) {
    async function openExternal(url: string, background = false) {
        if (url.startsWith("https://") || url.startsWith("http://")) {
            if (background && process.platform === "darwin") {
                shell.openExternal(url, { activate: false })
            } else if (background && manager.hasWindow()) {
                manager.mainWindow.setAlwaysOnTop(true)
                await shell.openExternal(url)
                setTimeout(() => manager.mainWindow.setAlwaysOnTop(false), 1000)
            } else {
                shell.openExternal(url)
            }
        }
    }

    app.on("web-contents-created", (_, contents) => {
        contents.setWindowOpenHandler(details => {
            if (contents.getType() === "webview")
                openExternal(
                    details.url,
                    details.disposition === "background-tab"
                )
            return {
                action: manager.hasWindow() ? "deny" : "allow",
            }
        })
        contents.on("will-navigate", (event, url) => {
            event.preventDefault()
            if (contents.getType() === "webview") openExternal(url)
        })
    })

    ipcMain.on("get-version", event => {
        event.returnValue = app.getVersion()
    })

    ipcMain.handle("open-external", (_, url: string, background: boolean) => {
        openExternal(url, background)
    })

    ipcMain.handle("show-error-box", (_, title, content) => {
        dialog.showErrorBox(title, content)
    })

    ipcMain.handle(
        "show-message-box",
        async (_, title, message, confirm, cancel, defaultCancel, type) => {
            if (manager.hasWindow()) {
                let response = await dialog.showMessageBox(manager.mainWindow, {
                    type: type,
                    title: title,
                    message: message,
                    buttons:
                        process.platform === "win32"
                            ? ["Yes", "No"]
                            : [confirm, cancel],
                    cancelId: 1,
                    defaultId: defaultCancel ? 1 : 0,
                })
                return response.response === 0
            } else {
                return false
            }
        }
    )

    ipcMain.handle(
        "show-save-dialog",
        async (_, filters: Electron.FileFilter[], path: string) => {
            ipcMain.removeAllListeners("write-save-result")
            if (manager.hasWindow()) {
                let response = await dialog.showSaveDialog(manager.mainWindow, {
                    defaultPath: path,
                    filters: filters,
                })
                if (!response.canceled) {
                    ipcMain.handleOnce(
                        "write-save-result",
                        (_, result, errmsg) => {
                            fs.writeFile(response.filePath, result, err => {
                                if (err)
                                    dialog.showErrorBox(errmsg, String(err))
                            })
                        }
                    )
                    return true
                }
            }
            return false
        }
    )

    ipcMain.handle(
        "show-open-dialog",
        async (_, filters: Electron.FileFilter[]) => {
            if (manager.hasWindow()) {
                let response = await dialog.showOpenDialog(manager.mainWindow, {
                    filters: filters,
                    properties: ["openFile"],
                })
                if (!response.canceled) {
                    try {
                        return await fs.promises.readFile(
                            response.filePaths[0],
                            "utf-8"
                        )
                    } catch (err) {
                        console.log(err)
                    }
                }
            }
            return null
        }
    )

    ipcMain.handle("get-cache", async () => {
        return await session.defaultSession.getCacheSize()
    })

    ipcMain.handle("clear-cache", async () => {
        await session.defaultSession.clearCache()
    })

    app.on("web-contents-created", (_, contents) => {
        if (contents.getType() === "webview") {
            contents.on(
                "did-fail-load",
                (event, code, desc, validated, isMainFrame) => {
                    if (isMainFrame && manager.hasWindow()) {
                        manager.mainWindow.webContents.send(
                            "webview-error",
                            desc
                        )
                    }
                }
            )
            contents.on("context-menu", (_, params) => {
                if (
                    (params.hasImageContents ||
                        params.selectionText ||
                        params.linkURL) &&
                    manager.hasWindow()
                ) {
                    if (params.hasImageContents) {
                        ipcMain.removeHandler("image-callback")
                        ipcMain.handleOnce(
                            "image-callback",
                            (_, type: ImageCallbackTypes) => {
                                switch (type) {
                                    case ImageCallbackTypes.OpenExternal:
                                    case ImageCallbackTypes.OpenExternalBg:
                                        openExternal(
                                            params.srcURL,
                                            type ===
                                                ImageCallbackTypes.OpenExternalBg
                                        )
                                        break
                                    case ImageCallbackTypes.SaveAs:
                                        contents.session.downloadURL(
                                            params.srcURL
                                        )
                                        break
                                    case ImageCallbackTypes.Copy:
                                        contents.copyImageAt(params.x, params.y)
                                        break
                                    case ImageCallbackTypes.CopyLink:
                                        clipboard.writeText(params.srcURL)
                                        break
                                }
                            }
                        )
                        manager.mainWindow.webContents.send(
                            "webview-context-menu",
                            [params.x, params.y]
                        )
                    } else {
                        manager.mainWindow.webContents.send(
                            "webview-context-menu",
                            [params.x, params.y],
                            params.selectionText,
                            params.linkURL
                        )
                    }
                    contents
                        .executeJavaScript(
                            `new Promise(resolve => {
                        const dismiss = () => {
                            document.removeEventListener("mousedown", dismiss)
                            document.removeEventListener("scroll", dismiss)                            
                            resolve()
                        }
                        document.addEventListener("mousedown", dismiss)
                        document.addEventListener("scroll", dismiss)
                    })`
                        )
                        .then(() => {
                            if (manager.hasWindow()) {
                                manager.mainWindow.webContents.send(
                                    "webview-context-menu"
                                )
                            }
                        })
                }
            })
            contents.on("before-input-event", (_, input) => {
                if (manager.hasWindow()) {
                    let contents = manager.mainWindow.webContents
                    contents.send("webview-keydown", input)
                }
            })
        }
    })

    ipcMain.handle("write-clipboard", (_, text) => {
        clipboard.writeText(text)
    })

    ipcMain.handle("close-window", () => {
        if (manager.hasWindow()) manager.mainWindow.close()
    })

    ipcMain.handle("minimize-window", () => {
        if (manager.hasWindow()) manager.mainWindow.minimize()
    })

    ipcMain.handle("maximize-window", () => {
        manager.zoom()
    })

    ipcMain.on("is-maximized", event => {
        event.returnValue =
            Boolean(manager.mainWindow) && manager.mainWindow.isMaximized()
    })

    ipcMain.on("is-focused", event => {
        event.returnValue =
            manager.hasWindow() && manager.mainWindow.isFocused()
    })

    ipcMain.on("is-fullscreen", event => {
        event.returnValue =
            manager.hasWindow() && manager.mainWindow.isFullScreen()
    })

    ipcMain.handle("request-focus", () => {
        if (manager.hasWindow()) {
            const win = manager.mainWindow
            if (win.isMinimized()) win.restore()
            if (process.platform === "win32") {
                win.setAlwaysOnTop(true)
                win.setAlwaysOnTop(false)
            }
            win.focus()
        }
    })

    ipcMain.handle("request-attention", () => {
        if (manager.hasWindow() && !manager.mainWindow.isFocused()) {
            if (process.platform === "win32") {
                manager.mainWindow.flashFrame(true)
                manager.mainWindow.once("focus", () => {
                    manager.mainWindow.flashFrame(false)
                })
            } else if (process.platform === "darwin") {
                app.dock.bounce()
            }
        }
    })

    ipcMain.handle("touchbar-init", (_, texts: TouchBarTexts) => {
        if (manager.hasWindow()) initMainTouchBar(texts, manager.mainWindow)
    })
    ipcMain.handle("touchbar-destroy", () => {
        if (manager.hasWindow()) manager.mainWindow.setTouchBar(null)
    })

    ipcMain.handle("init-font-list", () => {
        return fontList.getFonts({
            disableQuoting: true,
        })
    })
}
