'use strict';

const unplugin = require('unplugin');
const core = require('@unplugin-analytics/core');
const scule = require('scule');

function renderScriptTag(tag) {
  const desc = {
    tag: "script",
    attrs: {},
    injectTo: "head"
  };
  if (tag.async) {
    desc.attrs.async = true;
  }
  if (tag.defer) {
    desc.attrs.defer = true;
  }
  for (const [key, value] of Object.entries(tag.dataset ?? {})) {
    desc.attrs[scule.kebabCase(`data-${key}`)] = escape(value);
  }
  if ("src" in tag) {
    desc.attrs.src = tag.src;
  } else {
    desc.children = tag.children;
  }
  return desc;
}
function escape(text) {
  return text.replace(/"/g, `"`);
}

const UnpluginAnalyticsRuntime = unplugin.createUnplugin((options = {}) => {
  const scripts = {
    clarity() {
      return [
        `export let clarity = import.meta.env.SSR ? undefined : window.clarity;`,
        `
if (!import.meta.env.SSR && !clarity) {
  window.addEventListener("load", (event) => {
    clarity = window.clarity;
  });
}`
      ].join("\n");
    },
    umami() {
      return [
        `export let umami = import.meta.env.SSR ? undefined : window.umami;`,
        `
if (!import.meta.env.SSR && !umami) {
  window.addEventListener("load", (event) => {
    umami = window.umami;
  });
}`
      ].join("\n");
    },
    scripts() {
      const tags = core.generate(options.analytics ?? []);
      return [`const tags = ${JSON.stringify(tags)};`, `export default tags;`].join("\n");
    }
  };
  const moduleNames = Object.keys(scripts).map((s) => `~analytics/${s}`);
  return {
    name: "unplugin-analytics:runtime",
    resolveId(id) {
      if (moduleNames.includes(id)) {
        return `\0${id}`;
      }
    },
    loadInclude(id) {
      if (!id.startsWith("\0"))
        return false;
      id = id.slice(1);
      return moduleNames.includes(id);
    },
    async load(id) {
      if (!id.startsWith("\0"))
        return;
      id = id.slice(1 + `~analytics/`.length);
      if (id in scripts) {
        return scripts[id]();
      }
    }
  };
});
const UnpluginAnalytics = unplugin.createUnplugin((options = {}) => {
  let isDev = false;
  return {
    name: "unplugin-analytics:html",
    vite: {
      configResolved(resolvedConfig) {
        isDev = resolvedConfig.command === "serve";
      },
      transformIndexHtml(_html, ctx) {
        if (options.dev && isDev) {
          return;
        }
        const tags = core.generate(options.analytics ?? []);
        return tags.map(renderScriptTag).filter(Boolean);
      }
    }
  };
});

exports.UnpluginAnalytics = UnpluginAnalytics;
exports.UnpluginAnalyticsRuntime = UnpluginAnalyticsRuntime;