import { cropperDataFieldsWithAspectRatio, loadImage } from "@html_editor/utils/image_processing";
import { registry } from "@web/core/registry";
import { Plugin } from "@html_editor/plugin";
import { ImageToolOption } from "./image_tool_option";
import { isImageCorsProtected } from "@html_editor/utils/image";
import { withSequence } from "@html_editor/utils/resource";
import {
    REPLACE_MEDIA,
    IMAGE_TOOL,
    ALIGNMENT_STYLE_PADDING,
} from "@html_builder/utils/option_sequence";
import { ReplaceMediaOption, searchSupportedParentLinkEl } from "./replace_media_option";
import { computeMaxDisplayWidth } from "@html_builder/plugins/image/image_format_option";
import { BuilderAction } from "@html_builder/core/builder_action";
import { selectElements } from "@html_editor/utils/dom_traversal";
import { isCSSColor } from "@web/core/utils/colors";
import { getCSSVariableValue, getHtmlStyle } from "@html_editor/utils/formatting";
import { BaseOptionComponent } from "@html_builder/core/utils";

export class ImageAndFaOption extends BaseOptionComponent {
    static template = "html_builder.ImageAndFaOption";
    static selector = "span.fa, i.fa, img";
    static exclude = "[data-oe-type='image'] > img, [data-oe-xpath]";
    static name = "imageAndFaOption";
}
class ImageToolOptionPlugin extends Plugin {
    static id = "imageToolOption";
    static dependencies = [
        "history",
        "userCommand",
        "imagePostProcess",
        "imageCrop",
        "media",
        "builderOptions",
    ];
    static shared = ["getCSSColorValue"];
    /** @type {import("plugins").BuilderResources} */
    resources = {
        builder_options: [
            withSequence(REPLACE_MEDIA, ReplaceMediaOption),
            withSequence(IMAGE_TOOL, ImageToolOption),
            withSequence(ALIGNMENT_STYLE_PADDING, ImageAndFaOption),
        ],
        builder_actions: {
            CropImageAction,
            ResetCropAction,
            ReplaceMediaAction,
            SetLinkAction,
            SetUrlAction,
            SetNewWindowAction,
            AltAction,
        },
        on_media_dialog_saved_handlers: async (elements, { node }) => {
            for (const image of elements) {
                if (image && image.tagName === "IMG") {
                    const updateImageAttributes =
                        await this.dependencies.imagePostProcess.processImage({
                            img: image,
                            newDataset: {
                                formatMimetype: this.config.defaultImageMimetype ?? "image/webp",
                            },
                            // TODO Using a callback is currently needed to avoid
                            // the extra RPC that would occur if loadImageInfo was
                            // called before processImage as well. This flow can be
                            // simplified if image infos are somehow cached.
                            onImageInfoLoaded: async (dataset) => {
                                if (!dataset.originalSrc || !dataset.originalId) {
                                    return true;
                                }
                                const original = await loadImage(dataset.originalSrc);
                                const maxWidth = dataset.width
                                    ? image.naturalWidth
                                    : original.naturalWidth;
                                const optimizedWidth = Math.min(
                                    maxWidth,
                                    computeMaxDisplayWidth(node || this.editable)
                                );
                                if (
                                    !["image/gif", "image/svg+xml"].includes(
                                        dataset.mimetypeBeforeConversion
                                    )
                                ) {
                                    // Convert to recommended format and width.
                                    dataset.resizeWidth = optimizedWidth;
                                } else if (
                                    dataset.shape &&
                                    dataset.mimetypeBeforeConversion !== "image/gif"
                                ) {
                                    dataset.resizeWidth = optimizedWidth;
                                } else {
                                    return true;
                                }
                            },
                        });
                    updateImageAttributes();
                }
            }
        },
        hover_effect_allowed_predicates: (el) => this.canHaveHoverEffect(el),
        normalize_handlers: this.migrateImages.bind(this),
    };
    setup() {
        this.htmlStyle = getHtmlStyle(this.document);
    }
    async canHaveHoverEffect(imgEl) {
        return imgEl.tagName === "IMG" && !(await isImageCorsProtected(imgEl));
    }
    migrateImages(rootEl) {
        for (const el of selectElements(
            rootEl,
            "img[data-original-id]:not([data-attachment-id]), .oe_img_bg[data-original-id]:not([data-attachment-id])"
        )) {
            el.dataset.attachmentId = el.dataset.originalId;
        }
        for (const el of selectElements(
            rootEl,
            "img[data-original-mimetype]:not([data-format-mimetype]), .oe_img_bg[data-original-mimetype]:not([data-format-mimetype])"
        )) {
            el.dataset.formatMimetype = el.dataset.originalMimetype;
            delete el.dataset.originalMimetype;
        }
    }
    /**
     * Gets the CSS value of a color variable name.
     *
     * @param {string} color
     * @returns {string}
     */
    getCSSColorValue(color) {
        if (!color || isCSSColor(color)) {
            return color;
        }
        return getCSSVariableValue(color, this.htmlStyle);
    }
}

export class CropImageAction extends BuilderAction {
    static id = "cropImage";
    static dependencies = ["imageCrop", "imagePostProcess"];
    isApplied({ editingElement }) {
        return cropperDataFieldsWithAspectRatio.some((field) => editingElement.dataset[field]);
    }
    load({ editingElement: img }) {
        return new Promise((resolve) => {
            this.dependencies.imageCrop.openCropImage(img, {
                onClose: resolve,
                onSave: async (newDataset) => {
                    resolve(this.dependencies.imagePostProcess.processImage({ img, newDataset }));
                },
            });
        });
    }
    apply({ loadResult: updateImageAttributes }) {
        updateImageAttributes?.();
    }
}

export class ResetCropAction extends BuilderAction {
    static id = "resetCrop";
    static dependencies = ["imagePostProcess"];
    async load({ editingElement: img }) {
        const newDataset = Object.fromEntries(
            cropperDataFieldsWithAspectRatio.map((field) => [field, undefined])
        );
        return this.dependencies.imagePostProcess.processImage({ img, newDataset });
    }
    apply({ loadResult: updateImageAttributes }) {
        updateImageAttributes();
    }
}

export class ReplaceMediaAction extends BuilderAction {
    static id = "replaceMedia";
    static dependencies = ["media_website"];

    setup() {
        this.canTimeout = false;
    }

    async apply({ editingElement: mediaEl }) {
        await this.dependencies.media_website.replaceMedia(mediaEl);
    }
}
export class SetLinkAction extends BuilderAction {
    static id = "setLink";
    setup() {
        this.preview = false;
    }
    apply({ editingElement }) {
        const parentEl = searchSupportedParentLinkEl(editingElement);
        if (parentEl.tagName !== "A") {
            const wrapperEl = document.createElement("a");
            editingElement.after(wrapperEl);
            wrapperEl.appendChild(editingElement);
        } else {
            const fragment = document.createDocumentFragment();
            fragment.append(...parentEl.childNodes);
            parentEl.replaceWith(fragment);
        }
    }
    isApplied({ editingElement }) {
        const parentEl = searchSupportedParentLinkEl(editingElement);
        return parentEl.tagName === "A";
    }
}

export class SetUrlAction extends BuilderAction {
    static id = "setUrl";
    setup() {
        this.preview = false;
    }
    apply({ editingElement, value }) {
        const linkEl = searchSupportedParentLinkEl(editingElement);
        let url = value;
        if (!url) {
            // As long as there is no URL, the image is not considered a link.
            linkEl.removeAttribute("href");
            return;
        }
        if (!url.startsWith("/") && !url.startsWith("#") && !/^([a-zA-Z]*.):.+$/gm.test(url)) {
            // We permit every protocol (http:, https:, ftp:, mailto:,...).
            // If none is explicitly specified, we assume it is a http.
            url = "http://" + url;
        }
        linkEl.setAttribute("href", url);
    }
    getValue({ editingElement }) {
        const linkEl = searchSupportedParentLinkEl(editingElement);
        return linkEl.getAttribute("href");
    }
}

export class SetNewWindowAction extends BuilderAction {
    static id = "setNewWindow";
    setup() {
        this.preview = false;
    }
    apply({ editingElement, value }) {
        const linkEl = searchSupportedParentLinkEl(editingElement);
        linkEl.setAttribute("target", "_blank");
    }
    clean({ editingElement }) {
        const linkEl = searchSupportedParentLinkEl(editingElement);
        linkEl.removeAttribute("target");
    }
    isApplied({ editingElement }) {
        const linkEl = searchSupportedParentLinkEl(editingElement);
        return linkEl.getAttribute("target") === "_blank";
    }
}

export class AltAction extends BuilderAction {
    static id = "alt";
    getValue({ editingElement: imgEl }) {
        return imgEl.alt;
    }
    apply({ editingElement: imgEl, value }) {
        const trimmedValue = value.trim();
        if (trimmedValue) {
            imgEl.alt = trimmedValue;
            if (imgEl.getAttribute("role") === "presentation") {
                imgEl.removeAttribute("role");
            }
        } else {
            imgEl.removeAttribute("alt");
        }
    }
}

registry.category("builder-plugins").add(ImageToolOptionPlugin.id, ImageToolOptionPlugin);
