import * as chalk from "chalk";
import { program, Command, OptionValues } from "commander";

import { AuthenticationStatus } from "@bitwarden/common/auth/enums/authentication-status";

import { LockCommand } from "./auth/commands/lock.command";
import { LoginCommand } from "./auth/commands/login.command";
import { LogoutCommand } from "./auth/commands/logout.command";
import { UnlockCommand } from "./auth/commands/unlock.command";
import { Main } from "./bw";
import { CompletionCommand } from "./commands/completion.command";
import { ConfigCommand } from "./commands/config.command";
import { EncodeCommand } from "./commands/encode.command";
import { ServeCommand } from "./commands/serve.command";
import { StatusCommand } from "./commands/status.command";
import { UpdateCommand } from "./commands/update.command";
import { Response } from "./models/response";
import { ListResponse } from "./models/response/list.response";
import { MessageResponse } from "./models/response/message.response";
import { StringResponse } from "./models/response/string.response";
import { TemplateResponse } from "./models/response/template.response";
import { GenerateCommand } from "./tools/generate.command";
import { CliUtils } from "./utils";
import { SyncCommand } from "./vault/sync.command";

const writeLn = CliUtils.writeLn;

export class Program {
  constructor(protected main: Main) {}

  async register() {
    program
      .option("--pretty", "Format output. JSON is tabbed with two spaces.")
      .option("--raw", "Return raw output instead of a descriptive message.")
      .option("--response", "Return a JSON formatted version of response output.")
      .option("--cleanexit", "Exit with a success exit code (0) unless an error is thrown.")
      .option("--quiet", "Don't return anything to stdout.")
      .option("--nointeraction", "Do not prompt for interactive user input.")
      .option("--session <session>", "Pass session key instead of reading from env.")
      .version(await this.main.platformUtilsService.getApplicationVersion(), "-v, --version");

    program.on("option:pretty", () => {
      process.env.BW_PRETTY = "true";
    });

    program.on("option:raw", () => {
      process.env.BW_RAW = "true";
    });

    program.on("option:quiet", () => {
      process.env.BW_QUIET = "true";
    });

    program.on("option:response", () => {
      process.env.BW_RESPONSE = "true";
    });

    program.on("option:cleanexit", () => {
      process.env.BW_CLEANEXIT = "true";
    });

    program.on("option:nointeraction", () => {
      process.env.BW_NOINTERACTION = "true";
    });

    program.on("option:session", (key) => {
      process.env.BW_SESSION = key;
    });

    program.on("command:*", () => {
      writeLn(chalk.redBright("Invalid command: " + program.args.join(" ")), false, true);
      writeLn("See --help for a list of available commands.", true, true);
      process.exitCode = 1;
    });

    program.on("--help", () => {
      writeLn("\n  Examples:");
      writeLn("");
      writeLn("    bw login");
      writeLn("    bw lock");
      writeLn("    bw unlock myPassword321");
      writeLn("    bw list --help");
      writeLn("    bw list items --search google");
      writeLn("    bw get item 99ee88d2-6046-4ea7-92c2-acac464b1412");
      writeLn("    bw get password google.com");
      writeLn('    echo \'{"name":"My Folder"}\' | bw encode');
      writeLn("    bw create folder eyJuYW1lIjoiTXkgRm9sZGVyIn0K");
      writeLn(
        "    bw edit folder c7c7b60b-9c61-40f2-8ccd-36c49595ed72 eyJuYW1lIjoiTXkgRm9sZGVyMiJ9Cg==",
      );
      writeLn("    bw delete item 99ee88d2-6046-4ea7-92c2-acac464b1412");
      writeLn("    bw generate -lusn --length 18");
      writeLn("    bw config server https://bitwarden.example.com");
      writeLn("    bw send -f ./file.ext");
      writeLn('    bw send "text to send"');
      writeLn('    echo "text to send" | bw send');
      writeLn(
        "    bw receive https://vault.bitwarden.com/#/send/rg3iuoS_Akm2gqy6ADRHmg/Ht7dYjsqjmgqUM3rjzZDSQ",
      );
      writeLn("", true);
    });

    program
      .command("login [email] [password]")
      .description("Log into a user account.")
      .option("--method <method>", "Two-step login method.")
      .option("--code <code>", "Two-step login code.")
      .option("--sso", "Log in with Single-Sign On.")
      .option("--apikey", "Log in with an Api Key.")
      .option("--passwordenv <passwordenv>", "Environment variable storing your password")
      .option(
        "--passwordfile <passwordfile>",
        "Path to a file containing your password as its first line",
      )
      .option("--check", "Check login status.", async () => {
        const authed = await this.main.stateService.getIsAuthenticated();
        if (authed) {
          const res = new MessageResponse("You are logged in!", null);
          this.processResponse(Response.success(res), true);
        }
        this.processResponse(Response.error("You are not logged in."), true);
      })
      .on("--help", () => {
        writeLn("\n  Notes:");
        writeLn("");
        writeLn("    See docs for valid `method` enum values.");
        writeLn("");
        writeLn("    Pass `--raw` option to only return the session key.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn("    bw login");
        writeLn("    bw login john@example.com myPassword321 --raw");
        writeLn("    bw login john@example.com myPassword321 --method 1 --code 249213");
        writeLn("    bw login --sso");
        writeLn("", true);
      })
      .action(async (email: string, password: string, options: OptionValues) => {
        if (!options.check) {
          await this.exitIfAuthed();
          const command = new LoginCommand(
            this.main.loginStrategyService,
            this.main.authService,
            this.main.apiService,
            this.main.cryptoFunctionService,
            this.main.environmentService,
            this.main.passwordGenerationService,
            this.main.passwordStrengthService,
            this.main.platformUtilsService,
            this.main.stateService,
            this.main.cryptoService,
            this.main.policyService,
            this.main.twoFactorService,
            this.main.syncService,
            this.main.keyConnectorService,
            this.main.policyApiService,
            this.main.organizationService,
            async () => await this.main.logout(),
          );
          const response = await command.run(email, password, options);
          this.processResponse(response, true);
        }
      });

    program
      .command("logout")
      .description("Log out of the current user account.")
      .on("--help", () => {
        writeLn("\n  Examples:");
        writeLn("");
        writeLn("    bw logout");
        writeLn("", true);
      })
      .action(async (cmd) => {
        await this.exitIfNotAuthed();
        const command = new LogoutCommand(
          this.main.authService,
          this.main.i18nService,
          async () => await this.main.logout(),
        );
        const response = await command.run();
        this.processResponse(response);
      });

    program
      .command("lock")
      .description("Lock the vault and destroy active session keys.")
      .on("--help", () => {
        writeLn("\n  Examples:");
        writeLn("");
        writeLn("    bw lock");
        writeLn("", true);
      })
      .action(async (cmd) => {
        await this.exitIfNotAuthed();

        if (await this.main.keyConnectorService.getUsesKeyConnector()) {
          const logoutCommand = new LogoutCommand(
            this.main.authService,
            this.main.i18nService,
            async () => await this.main.logout(),
          );
          await logoutCommand.run();
          this.processResponse(
            Response.error(
              "You cannot lock your vault because you are using Key Connector. " +
                "To protect your vault, you have been logged out.",
            ),
            true,
          );
          return;
        }

        const command = new LockCommand(this.main.vaultTimeoutService);
        const response = await command.run();
        this.processResponse(response);
      });

    program
      .command("unlock [password]")
      .description("Unlock the vault and return a new session key.")
      .on("--help", () => {
        writeLn("\n  Notes:");
        writeLn("");
        writeLn("    After unlocking, any previous session keys will no longer be valid.");
        writeLn("");
        writeLn("    Pass `--raw` option to only return the session key.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn("    bw unlock");
        writeLn("    bw unlock myPassword321");
        writeLn("    bw unlock myPassword321 --raw");
        writeLn("", true);
      })
      .option("--check", "Check lock status.", async () => {
        await this.exitIfNotAuthed();

        const authStatus = await this.main.authService.getAuthStatus();
        if (authStatus === AuthenticationStatus.Unlocked) {
          const res = new MessageResponse("Vault is unlocked!", null);
          this.processResponse(Response.success(res), true);
        } else {
          this.processResponse(Response.error("Vault is locked."), true);
        }
      })
      .option("--passwordenv <passwordenv>", "Environment variable storing your password")
      .option(
        "--passwordfile <passwordfile>",
        "Path to a file containing your password as its first line",
      )
      .action(async (password, cmd) => {
        if (!cmd.check) {
          await this.exitIfNotAuthed();
          const command = new UnlockCommand(
            this.main.accountService,
            this.main.masterPasswordService,
            this.main.cryptoService,
            this.main.stateService,
            this.main.cryptoFunctionService,
            this.main.apiService,
            this.main.logService,
            this.main.keyConnectorService,
            this.main.environmentService,
            this.main.syncService,
            this.main.organizationApiService,
            async () => await this.main.logout(),
          );
          const response = await command.run(password, cmd);
          this.processResponse(response);
        }
      });

    program
      .command("sync")
      .description("Pull the latest vault data from server.")
      .option("-f, --force", "Force a full sync.")
      .option("--last", "Get the last sync date.")
      .on("--help", () => {
        writeLn("\n  Examples:");
        writeLn("");
        writeLn("    bw sync");
        writeLn("    bw sync -f");
        writeLn("    bw sync --last");
        writeLn("", true);
      })
      .action(async (cmd) => {
        await this.exitIfNotAuthed();
        const command = new SyncCommand(this.main.syncService);
        const response = await command.run(cmd);
        this.processResponse(response);
      });

    program
      .command("generate")
      .description("Generate a password/passphrase.")
      .option("-u, --uppercase", "Include uppercase characters.")
      .option("-l, --lowercase", "Include lowercase characters.")
      .option("-n, --number", "Include numeric characters.")
      .option("-s, --special", "Include special characters.")
      .option("-p, --passphrase", "Generate a passphrase.")
      .option("--length <length>", "Length of the password.")
      .option("--words <words>", "Number of words.")
      .option("--minNumber <count>", "Minimum number of numeric characters.")
      .option("--minSpecial <count>", "Minimum number of special characters.")
      .option("--separator <separator>", "Word separator.")
      .option("-c, --capitalize", "Title case passphrase.")
      .option("--includeNumber", "Passphrase includes number.")
      .option("--ambiguous", "Avoid ambiguous characters.")
      .on("--help", () => {
        writeLn("\n  Notes:");
        writeLn("");
        writeLn("    Default options are `-uln --length 14`.");
        writeLn("");
        writeLn("    Minimum `length` is 5.");
        writeLn("");
        writeLn("    Minimum `words` is 3.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn("    bw generate");
        writeLn("    bw generate -u -l --length 18");
        writeLn("    bw generate -ulns --length 25");
        writeLn("    bw generate -ul");
        writeLn("    bw generate -p --separator _");
        writeLn("    bw generate -p --words 5 --separator space");
        writeLn("    bw generate -p --words 5 --separator empty");
        writeLn("", true);
      })
      .action(async (options) => {
        const command = new GenerateCommand(
          this.main.passwordGenerationService,
          this.main.stateService,
        );
        const response = await command.run(options);
        this.processResponse(response);
      });

    program
      .command("encode")
      .description("Base 64 encode stdin.")
      .on("--help", () => {
        writeLn("\n  Notes:");
        writeLn("");
        writeLn("    Use to create `encodedJson` for `create` and `edit` commands.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn('    echo \'{"name":"My Folder"}\' | bw encode');
        writeLn("", true);
      })
      .action(async () => {
        const command = new EncodeCommand();
        const response = await command.run();
        this.processResponse(response);
      });

    program
      .command("config <setting> [value]")
      .description("Configure CLI settings.")
      .option(
        "--web-vault <url>",
        "Provides a custom web vault URL that differs from the base URL.",
      )
      .option("--api <url>", "Provides a custom API URL that differs from the base URL.")
      .option("--identity <url>", "Provides a custom identity URL that differs from the base URL.")
      .option(
        "--icons <url>",
        "Provides a custom icons service URL that differs from the base URL.",
      )
      .option(
        "--notifications <url>",
        "Provides a custom notifications URL that differs from the base URL.",
      )
      .option("--events <url>", "Provides a custom events URL that differs from the base URL.")
      .option("--key-connector <url>", "Provides the URL for your Key Connector server.")
      .on("--help", () => {
        writeLn("\n  Settings:");
        writeLn("");
        writeLn("    server - On-premises hosted installation URL.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn("    bw config server");
        writeLn("    bw config server https://bw.company.com");
        writeLn("    bw config server bitwarden.com");
        writeLn(
          "    bw config server --api http://localhost:4000 --identity http://localhost:33656",
        );
        writeLn("", true);
      })
      .action(async (setting, value, options) => {
        const command = new ConfigCommand(this.main.environmentService);
        const response = await command.run(setting, value, options);
        this.processResponse(response);
      });

    program
      .command("update")
      .description("Check for updates.")
      .on("--help", () => {
        writeLn("\n  Notes:");
        writeLn("");
        writeLn("    Returns the URL to download the newest version of this CLI tool.");
        writeLn("");
        writeLn("    Use the `--raw` option to return only the download URL for the update.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn("    bw update");
        writeLn("    bw update --raw");
        writeLn("", true);
      })
      .action(async () => {
        const command = new UpdateCommand(this.main.platformUtilsService);
        const response = await command.run();
        this.processResponse(response);
      });

    program
      .command("completion")
      .description("Generate shell completions.")
      .option("--shell <shell>", "Shell to generate completions for.")
      .on("--help", () => {
        writeLn("\n  Notes:");
        writeLn("");
        writeLn("    Valid shells are `zsh`.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn("    bw completion --shell zsh");
        writeLn("", true);
      })
      .action(async (options: OptionValues, cmd: Command) => {
        const command = new CompletionCommand();
        const response = await command.run(options);
        this.processResponse(response);
      });

    program
      .command("status")
      .description("Show server, last sync, user information, and vault status.")
      .on("--help", () => {
        writeLn("");
        writeLn("");
        writeLn("  Example return value:");
        writeLn("");
        writeLn("    {");
        writeLn('      "serverUrl": "https://bitwarden.example.com",');
        writeLn('      "lastSync": "2020-06-16T06:33:51.419Z",');
        writeLn('      "userEmail": "user@example.com,');
        writeLn('      "userId": "00000000-0000-0000-0000-000000000000",');
        writeLn('      "status": "locked"');
        writeLn("    }");
        writeLn("");
        writeLn("  Notes:");
        writeLn("");
        writeLn("  `status` is one of:");
        writeLn("    - `unauthenticated` when you are not logged in");
        writeLn("    - `locked` when you are logged in and the vault is locked");
        writeLn("    - `unlocked` when you are logged in and the vault is unlocked");
        writeLn("", true);
      })
      .action(async () => {
        const command = new StatusCommand(
          this.main.environmentService,
          this.main.syncService,
          this.main.stateService,
          this.main.authService,
        );
        const response = await command.run();
        this.processResponse(response);
      });

    program
      .command("serve")
      .description("Start a RESTful API webserver.")
      .option("--hostname <hostname>", "The hostname to bind your API webserver to.")
      .option("--port <port>", "The port to run your API webserver on.")
      .option(
        "--disable-origin-protection",
        "If set, allows requests with origin header. Warning, this option exists for backwards compatibility reasons and exposes your environment to known CSRF attacks.",
      )
      .on("--help", () => {
        writeLn("\n  Notes:");
        writeLn("");
        writeLn("    Default hostname is `localhost`.");
        writeLn("    Use hostname `all` for no hostname binding.");
        writeLn("    Default port is `8087`.");
        writeLn("");
        writeLn("  Examples:");
        writeLn("");
        writeLn("    bw serve");
        writeLn("    bw serve --port 8080");
        writeLn("    bw serve --hostname bwapi.mydomain.com --port 80");
        writeLn("", true);
      })
      .action(async (cmd) => {
        await this.exitIfNotAuthed();
        const command = new ServeCommand(this.main);
        await command.run(cmd);
      });
  }

  protected processResponse(response: Response, exitImmediately = false) {
    if (!response.success) {
      if (process.env.BW_QUIET !== "true") {
        if (process.env.BW_RESPONSE === "true") {
          writeLn(this.getJson(response), true, false);
        } else {
          writeLn(chalk.redBright(response.message), true, true);
        }
      }
      const exitCode = process.env.BW_CLEANEXIT ? 0 : 1;
      if (exitImmediately) {
        process.exit(exitCode);
      } else {
        process.exitCode = exitCode;
      }
      return;
    }

    if (process.env.BW_RESPONSE === "true") {
      writeLn(this.getJson(response), true, false);
    } else if (response.data != null) {
      let out: string = null;

      if (response.data.object === "template") {
        out = this.getJson((response.data as TemplateResponse).template);
      }

      if (out == null) {
        if (response.data.object === "string") {
          const data = (response.data as StringResponse).data;
          if (data != null) {
            out = data;
          }
        } else if (response.data.object === "list") {
          out = this.getJson((response.data as ListResponse).data);
        } else if (response.data.object === "message") {
          out = this.getMessage(response);
        } else {
          out = this.getJson(response.data);
        }
      }

      if (out != null && process.env.BW_QUIET !== "true") {
        writeLn(out, true, false);
      }
    }
    if (exitImmediately) {
      process.exit(0);
    } else {
      process.exitCode = 0;
    }
  }

  private getJson(obj: any): string {
    if (process.env.BW_PRETTY === "true") {
      return JSON.stringify(obj, null, "  ");
    } else {
      return JSON.stringify(obj);
    }
  }

  private getMessage(response: Response): string {
    const message = response.data as MessageResponse;
    if (process.env.BW_RAW === "true") {
      return message.raw;
    }

    let out = "";
    if (message.title != null) {
      if (message.noColor) {
        out = message.title;
      } else {
        out = chalk.greenBright(message.title);
      }
    }
    if (message.message != null) {
      if (message.title != null) {
        out += "\n";
      }
      out += message.message;
    }
    return out.trim() === "" ? null : out;
  }

  private async exitIfAuthed() {
    const authed = await this.main.stateService.getIsAuthenticated();
    if (authed) {
      const email = await this.main.stateService.getEmail();
      this.processResponse(Response.error("You are already logged in as " + email + "."), true);
    }
  }

  private async exitIfNotAuthed() {
    const authed = await this.main.stateService.getIsAuthenticated();
    if (!authed) {
      this.processResponse(Response.error("You are not logged in."), true);
    }
  }

  protected async exitIfLocked() {
    await this.exitIfNotAuthed();
    if (await this.main.cryptoService.hasUserKey()) {
      return;
    } else if (process.env.BW_NOINTERACTION !== "true") {
      // must unlock
      if (await this.main.keyConnectorService.getUsesKeyConnector()) {
        const response = Response.error(
          "Your vault is locked. You must unlock your vault using your session key.\n" +
            "If you do not have your session key, you can get a new one by logging out and logging in again.",
        );
        this.processResponse(response, true);
      } else {
        const command = new UnlockCommand(
          this.main.accountService,
          this.main.masterPasswordService,
          this.main.cryptoService,
          this.main.stateService,
          this.main.cryptoFunctionService,
          this.main.apiService,
          this.main.logService,
          this.main.keyConnectorService,
          this.main.environmentService,
          this.main.syncService,
          this.main.organizationApiService,
          this.main.logout,
        );
        const response = await command.run(null, null);
        if (!response.success) {
          this.processResponse(response, true);
        }
      }
    } else {
      this.processResponse(Response.error("Vault is locked."), true);
    }
  }
}
