import fs from "fs-extra";
import path from "node:path";
import { globby } from "globby";
import {
  isSketchCollection,
  Sketch,
  SketchCollection,
  SketchProperties,
} from "@seasketch/geoprocessing/client-core";
import { GpStoryConfig } from "./types.js";
import { v4 as uuid } from "uuid";

if (!process.env.PROJECT_PATH) {
  throw new Error("PROJECT_PATH environment variable not set");
}
const PROJECT_PATH: string = process.env.PROJECT_PATH;

const sketchDir = path.join(PROJECT_PATH, "examples", "sketches");
if (!fs.existsSync(sketchDir)) {
  throw new Error(`Example sketch path ${sketchDir} does not exist`);
}

const outputDir = path.join(PROJECT_PATH, "examples", "output");
if (!fs.existsSync(outputDir)) {
  console.error(
    `Example output path ${outputDir} does not exist.  Have you added to examples/sketches and run the test suite?`,
  );
  process.exit();
}

const storyDir = path.join(PROJECT_PATH, "src");
// console.log("storyDir", storyDir);

// delete old story cache directories

const cachePaths = await globby(path.join(storyDir, "**/.story-cache"), {
  onlyDirectories: true,
});
// console.log("cachePaths", cachePaths);
for (const cachePath of cachePaths) {
  fs.rmSync(cachePath, { recursive: true });
}

// load report story configs
const storyPaths = await globby(
  path.join(storyDir, "**/*.example-stories.ts"),
  {
    onlyFiles: true,
  },
);
// console.log("storyPaths", storyPaths);
const storyConfigs: GpStoryConfig[] = [];
for (const storyPath of storyPaths) {
  try {
    const { storyConfig } = await import(storyPath);
    storyConfigs.push({
      ...storyConfig,
      path: storyPath,
    });
  } catch {
    console.log(`Trouble parsing example ${storyPath}`);
  }
}
// console.log("storyConfigs", storyConfigs);

// load project sketches, that are not from templates (sketch filename is prefixed with gp)
const sketchFilenames = fs
  .readdirSync(sketchDir)
  .filter((sketchFilename) => path.extname(sketchFilename) === ".json")
  .filter(
    (sketchFilename) =>
      path.basename(sketchFilename).startsWith("gp", 0) === false,
  );

// console.log("sketchFilenames", sketchFilenames);
const sketches: (Sketch | SketchCollection)[] = [];
for (const sketchFilename of sketchFilenames) {
  try {
    const sketch: Sketch | SketchCollection = fs.readJSONSync(
      path.join(sketchDir, sketchFilename),
    ) as Sketch;
    if (sketch && sketch.properties.name) {
      sketches.push(sketch);
    }
  } catch {
    console.log(`Trouble parsing example ${sketchFilename}`);
  }
}

// Load related example outputs
const outputs: { sketchName: string; results: any; functionName: string }[] =
  [];
for (const sketch of sketches) {
  const outputPath = path.join(outputDir, sketch.properties.name);
  if (fs.existsSync(outputPath)) {
    const outputFilenames = fs.readdirSync(outputPath);
    for (const outputFilename of outputFilenames) {
      if (path.extname(outputFilename) === ".json") {
        outputs.push({
          sketchName: sketch.properties.name,
          results: fs.readJSONSync(path.join(outputPath, outputFilename)),
          functionName: path.basename(outputFilename, ".json"),
        });
      }
    }
  }
}

// Generate stories

for (const storyConfig of storyConfigs) {
  for (const sketch of sketches) {
    console.log(
      `Generating story for ${storyConfig.componentName} - ${sketch.properties.name}`,
    );

    // Pull out relative path from import string and replace with path that will work from story cache subdirectory

    if (!fs.existsSync(storyConfig.path!)) {
      console.log(
        `Story config path ${storyConfig.path} does not exist, skipping`,
      );
      continue;
    }
    const importFromCacheStr = `../${storyConfig.componentPath}`
      .replace(".ts", ".js")
      .replace(".tsx", ".js");

    const storyTitleSplit = storyConfig.title.split("/");
    // extract story name from title
    const storyName = storyTitleSplit.at(-1);
    const storyOutDir = path.join(
      path.dirname(storyConfig.path!),
      ".story-cache",
    );
    const storyOutPath = path.join(
      storyOutDir,
      `${storyName}-${sketch.properties.name}.stories.tsx`,
    );

    const exampleOutputs = outputs.filter((output) => {
      return output.sketchName === sketch.properties.name;
    });
    if (!exampleOutputs) {
      console.log(
        `No results found for sketch ${sketch.properties.name}, skipping`,
      );
      continue;
    }

    const childProperties: SketchProperties["childProperties"] = (() => {
      if (isSketchCollection(sketch)) {
        return sketch.features.map((feature) => feature.properties);
      }
      return;
    })();

    const newSketchProperties: SketchProperties = {
      ...sketch.properties,
      ...(childProperties ? { childProperties } : {}),
    };

    // Convert sketch name to valid variable name, which is displayed as the story name
    const sketchVariableName = sketch.properties.name
      .replace(/^[^a-zA-Z$_\p{L}]/u, "_") // Replace invalid starting characters
      .replaceAll(/[^a-zA-Z0-9$_\p{L}]/gu, "_"); // Replace invalid subsequent characters

    const story = `
      import React from "react";
      import { ${storyConfig.componentName} } from '${importFromCacheStr}';
      import {
        createReportDecorator,
        sampleSketchReportContextValue,
      } from "@seasketch/geoprocessing/client-ui";
      import Translator from "${path.join(PROJECT_PATH, "src", "components", "TranslatorAsync.js")}";

      const contextValue = sampleSketchReportContextValue({
        exampleOutputs: ${JSON.stringify(exampleOutputs, null, 2)},
        sketchProperties: ${JSON.stringify(newSketchProperties, null, 2)},
        projectUrl: "https://example.com/project",
        geometryUri: 'https://localhost/${uuid()}',
        visibleLayers: [],
        language: "en"
      });

      export const ${sketchVariableName} = () => (
        <Translator>
          <${storyConfig.componentName} />
        </Translator>
      );

      export default {
        component: ${storyConfig.componentName},
        title: '${storyConfig.title}',
        name: '${sketch.properties.name}',
        decorators: [createReportDecorator(contextValue)],
      };
    `;

    fs.ensureDirSync(storyOutDir);
    fs.writeFileSync(storyOutPath, story);
  }
}