import { assert, type Equals } from "tsafe/assert";
import type {
    KeycloakAccountV1Version,
    KeycloakThemeAdditionalInfoExtensionVersion
} from "./extensionVersions";
import { join as pathJoin, dirname as pathDirname } from "path";
import { transformCodebase } from "../../tools/transformCodebase";
import type { BuildContext } from "../../shared/buildContext";
import * as fs from "fs/promises";
import {
    generatePom,
    BuildContextLike as BuildContextLike_generatePom
} from "./generatePom";
import { readFileSync } from "fs";
import { isInside } from "../../tools/isInside";
import child_process from "child_process";
import { rmSync } from "../../tools/fs.rmSync";
import { existsAsync } from "../../tools/fs.existsAsync";

export type BuildContextLike = BuildContextLike_generatePom & {
    keycloakifyBuildDirPath: string;
    themeNames: string[];
    artifactId: string;
    themeVersion: string;
    cacheDirPath: string;
    implementedThemeTypes: BuildContext["implementedThemeTypes"];
};

assert<BuildContext extends BuildContextLike ? true : false>();

export async function buildJar(params: {
    jarFileBasename: string;
    keycloakAccountV1Version: KeycloakAccountV1Version;
    keycloakThemeAdditionalInfoExtensionVersion: KeycloakThemeAdditionalInfoExtensionVersion;
    resourcesDirPath: string;
    doesImplementAccountV1Theme: boolean;
    buildContext: BuildContextLike;
}): Promise<void> {
    const {
        jarFileBasename,
        keycloakAccountV1Version,
        keycloakThemeAdditionalInfoExtensionVersion,
        resourcesDirPath,
        doesImplementAccountV1Theme,
        buildContext
    } = params;

    const keycloakifyBuildCacheDirPath = pathJoin(
        buildContext.cacheDirPath,
        "maven",
        jarFileBasename.replace(".jar", "")
    );

    const tmpResourcesDirPath = pathJoin(
        keycloakifyBuildCacheDirPath,
        "src",
        "main",
        "resources"
    );

    rmSync(tmpResourcesDirPath, { recursive: true, force: true });

    transformCodebase({
        srcDirPath: resourcesDirPath,
        destDirPath: tmpResourcesDirPath,
        transformSourceCode:
            !doesImplementAccountV1Theme || keycloakAccountV1Version !== null
                ? undefined
                : (params: {
                      fileRelativePath: string;
                      sourceCode: Buffer;
                  }): { modifiedSourceCode: Buffer } | undefined => {
                      const { fileRelativePath, sourceCode } = params;

                      if (
                          isInside({
                              dirPath: pathJoin("theme", "account-v1"),
                              filePath: fileRelativePath
                          })
                      ) {
                          return undefined;
                      }

                      for (const themeName of buildContext.themeNames) {
                          if (
                              fileRelativePath ===
                              pathJoin("theme", themeName, "account", "theme.properties")
                          ) {
                              const modifiedSourceCode = Buffer.from(
                                  sourceCode
                                      .toString("utf8")
                                      .replace(`parent=account-v1`, "parent=keycloak"),
                                  "utf8"
                              );

                              assert(
                                  Buffer.compare(modifiedSourceCode, sourceCode) !== 0
                              );

                              return { modifiedSourceCode };
                          }
                      }

                      return { modifiedSourceCode: sourceCode };
                  }
    });

    {
        const filePath = pathJoin(
            tmpResourcesDirPath,
            "META-INF",
            "keycloak-themes.json"
        );

        await fs.mkdir(pathDirname(filePath));

        await fs.writeFile(
            filePath,
            Buffer.from(
                JSON.stringify(
                    {
                        themes: await (async () => {
                            const dirPath = pathJoin(tmpResourcesDirPath, "theme");

                            const themeNames = await fs.readdir(dirPath);

                            return Promise.all(
                                themeNames.map(async themeName => {
                                    const types = await fs.readdir(
                                        pathJoin(dirPath, themeName)
                                    );

                                    return {
                                        name: themeName,
                                        types
                                    };
                                })
                            );
                        })()
                    },
                    null,
                    2
                ),
                "utf8"
            )
        );
    }

    route_legacy_pages: {
        if (!buildContext.implementedThemeTypes.login.isImplemented) {
            break route_legacy_pages;
        }

        await Promise.all(
            (["register.ftl", "login-update-profile.ftl"] as const)
                .map(pageId =>
                    buildContext.themeNames.map(async themeName => {
                        const ftlFilePath = pathJoin(
                            tmpResourcesDirPath,
                            "theme",
                            themeName,
                            "login",
                            pageId
                        );

                        // NOTE: https://github.com/keycloakify/keycloakify/issues/665
                        if (!(await existsAsync(ftlFilePath))) {
                            return;
                        }

                        const ftlFileContent = readFileSync(ftlFilePath).toString("utf8");

                        const ftlFileBasename = (() => {
                            switch (pageId) {
                                case "register.ftl":
                                    return "register-user-profile.ftl";
                                case "login-update-profile.ftl":
                                    return "update-user-profile.ftl";
                            }
                            assert<Equals<typeof pageId, never>>(false);
                        })();

                        const modifiedFtlFileContent = ftlFileContent.replace(
                            `"ftlTemplateFileName": "${pageId}"`,
                            `"ftlTemplateFileName": "${ftlFileBasename}"`
                        );

                        assert(modifiedFtlFileContent !== ftlFileContent);

                        await fs.writeFile(
                            pathJoin(pathDirname(ftlFilePath), ftlFileBasename),
                            Buffer.from(modifiedFtlFileContent, "utf8")
                        );
                    })
                )
                .flat()
        );
    }

    {
        const { pomFileCode } = generatePom({
            buildContext,
            keycloakAccountV1Version,
            keycloakThemeAdditionalInfoExtensionVersion
        });

        await fs.writeFile(
            pathJoin(keycloakifyBuildCacheDirPath, "pom.xml"),
            Buffer.from(pomFileCode, "utf8")
        );
    }

    await new Promise<void>((resolve, reject) =>
        child_process.exec(
            `mvn clean install -Dmaven.repo.local="${pathJoin(keycloakifyBuildCacheDirPath, ".m2")}"`,
            { cwd: keycloakifyBuildCacheDirPath },
            error => {
                if (error !== null) {
                    console.error(
                        `Build jar failed: ${JSON.stringify(
                            {
                                jarFileBasename,
                                keycloakAccountV1Version,
                                keycloakThemeAdditionalInfoExtensionVersion
                            },
                            null,
                            2
                        )}`
                    );

                    reject(error);
                    return;
                }
                resolve();
            }
        )
    );

    await fs.rename(
        pathJoin(
            keycloakifyBuildCacheDirPath,
            "target",
            `${buildContext.artifactId}-${buildContext.themeVersion}.jar`
        ),
        pathJoin(buildContext.keycloakifyBuildDirPath, jarFileBasename)
    );
}