import { parseAuthor } from "./utils/author.js";
import { scase, uniqify } from "./utils/common.js";
import { makeTemplateComment, mdLink } from "./utils/index.js";
import { parsePackageName, prettifyPackageName } from "./utils/name.js";
import type { PackageInfo } from "./utils/package.js";

export type Browser = "chrome" | "edge" | "explorer" | "firefox" | "opera";

export type ScriptManager = "tampermonkey" | "violentmonkey" | "greasemonkey";

export interface GeneratorOptions {
    about?: string;
    excerpt?: string;
    installURL: string;
    languages?: string[];
    minifiedURL?: string;
    orgName?: string;
    orgURL?: string;
    postTitle?: string;
    roomURL?: string;
    screenshotAlt?: string;
    screenshotURL?: string;
    tags?: string[];
    testedIn?: Partial<Record<Browser, string>>;
    thumbnailURL?: string;
    worksWith?: ScriptManager[];
}

export interface GeneratedPost {
    body: string;
    tags: string;
    title: string;
}

/**
 * @summary generates StackApps post content
 * @param pkg package.json JSON
 * @param options parsed {@link GeneratorOptions}
 */
export const generateStackApps = (
    pkg: PackageInfo,
    options: GeneratorOptions
): GeneratedPost => {
    const {
        author,
        contributors = [],
        description = "",
        license = "",
        name,
        version = "1.0.0"
    } = pkg;

    const {
        about = description,
        excerpt = description,
        installURL,
        languages = [],
        minifiedURL,
        orgName,
        orgURL,
        postTitle,
        roomURL,
        screenshotAlt = "screenshot of the script",
        screenshotURL = "",
        tags = [],
        testedIn = {},
        thumbnailURL = "",
        worksWith = []
    } = options;

    const browserNames = Object.keys(testedIn);
    const testingData = Object.values(testedIn);

    const managerNames = uniqify(worksWith.map(scase));

    const {
        name: authorName,
        url: authorUrl = ""
    } = parseAuthor(author);

    const parsedContribs = contributors.map(parseAuthor);

    const contribs = parsedContribs.length ? `\n\nContributors:${parsedContribs.map(
        ({ name, url }) => `\n<br>${url ? mdLink(url, name) : name}`
    )}` : "";

    const { packageName, normalizedScopedName } = parsePackageName(name);

    const title = postTitle || `${prettifyPackageName(packageName)} - ${description}`;

    const minified = minifiedURL ? ` | ${mdLink(minifiedURL, "Minified")}` : "";

    const org = orgName ? `<br>Organization: ${orgURL ? mdLink(orgURL, orgName) : orgName}` : "";

    const room = roomURL ? `\nYou can also ${mdLink(roomURL, "drop by to chat")}, we are a friendly bunch.` : "";

    const screenshot = screenshotURL ? `## Screenshot\n\n!${mdLink(screenshotURL, screenshotAlt)}\n` : "";

    const testing = testingData.some(Boolean) ?
        `Version number means "last tested on":

| ${browserNames.map(scase).join(" | ")} |
| ${new Array(browserNames.length).fill("-").join(" | ")} |
| ${testingData.map((data) => data && !data.startsWith("no") ? `✔ ${data}` : "-").join(" | ")} |\n` :
        "";

    const managers = managerNames.length ?
        `${testing ? "\n" : ""}Supported userscript managers:\n\n${managerNames.map((n) => `- ${scase(n)}`).join("\n")}\n` :
        "";

    const platform = managers || testing ? `\n\n### Platform\n\n${testing}${managers}` : "";

    const body = `
${makeTemplateComment("thumbnail", thumbnailURL)}
${makeTemplateComment("version", version)}
${makeTemplateComment("tag", tags[0])}
${makeTemplateComment("excerpt", excerpt)}

${screenshot}
## About

${about}

### License

The script is licensed under the ${mdLink(`https://spdx.org/licenses/${license}`, license)} license.

### Download

Latest version: ${version}

${mdLink(installURL, "Install")}${minified}
${platform}
## Change log

| Version    | Description |
| ---------- | ----------- |
| ${version} |             |

## Contact

Author: ${authorUrl ? mdLink(authorUrl, authorName) : authorName}
${org}${contribs}

Please, submit bug reports ${mdLink(`https://github.com/${normalizedScopedName}/issues`, "on the source repository")}.
<br>Before adding a new one, please check if it hasn't been raised before.
${room}

## Code

${mdLink(`https://github.com/${normalizedScopedName}/blob/master/src/index.ts`, "Source code")} is written in ${languages.join(", ")}.

Contributions are welcome, you can always ${mdLink(`https://github.com/${normalizedScopedName}/pulls`, "submit a PR here")}.`;

    return { title, body, tags: tags.join(" ") };
};