import { Command } from "commander";
import { runDocument, resolvePublishConfig, type DocumentRunConfig } from "@pipeline/core";
import { PLATFORM_PRESETS, TEMPLATE_TYPES, PLATFORM_PRESET_KEYS } from "@pipeline/shared";
import { resolveOutputDir } from "@pipeline/shared/node";
import { readFileSync, existsSync } from "node:fs";
import { resolve, dirname } from "node:path";
import { parse as parseYaml } from "yaml";

// Commander --no-tts sets opts.tts = false (not opts.noTts)
const skipTts = (opts: any) => opts.tts === false;
// Commander --no-publish sets opts.publish = false
const skipPublish = (opts: any) => opts.publish === false;

export const renderCommand = new Command("render")
  .description("Generate video from text, markdown, or structured JSON input")
  .argument("[input]", "Input file path (JSON, markdown, or plain text). Required unless --source is used.")
  .requiredOption("-t, --template <type>", `Template: ${TEMPLATE_TYPES.join("|")}`)
  .option("-p, --platform <preset>", "Platform preset", "bilibili")
  .option("-o, --output <dir>", "Output directory (default: config output.dir or ./output)")
  .option("--assets-dir <dir>", "Image assets directory (defaults to JSON file location)")
  .option("--config <path>", "Config file path")
  .option("-v, --verbose", "Verbose logging")

  // Data source
  .option("--source <name>", "Collect data from source before rendering")
  .option("--source-owner <owner>", "Repo owner (for github-repo source)")
  .option("--source-repo <repo>", "Repo name (for github-repo source)")

  // LLM
  .option("--skip-llm", "Skip LLM processing (require valid VideoInputSchema JSON)")
  .option("--llm-model <model>", "LLM model name")
  .option("--llm-base-url <url>", "LLM API base URL")
  .option("--llm-api-key <key>", "LLM API key")

  // TTS — general
  .option("--tts-provider <provider>", "TTS provider (openai-tts|fish-audio|minimax|elevenlabs)")
  .option("--voice <id>", "Voice ID")
  .option("--tts-model <model>", "TTS model name (provider-specific)")
  .option("--tts-speed <speed>", "TTS speech speed (0.5-2.0)", parseFloat)
  .option("--tts-format <format>", "TTS audio format (mp3|wav|pcm)")
  .option("--no-tts", "Skip TTS (generate silent video)")
  .option("--channel-name <name>", "Channel name displayed in video watermark")
  .option("--no-publish", "Skip OSS upload + Feishu notification")

  // Alignment
  .option("--alignment <mode>", "Timestamp alignment: whisper|native")
  .option("--whisper-model <model>", "Whisper model size (tiny/base/small/medium/large)", "base")
  .option("--alignment-language <lang>", "Language hint for whisper (e.g. zh, en)")

  .action(async (input, opts) => {
   try {
    const template = opts.template as string;
    if (!TEMPLATE_TYPES.includes(template as any)) {
      console.error(`Error: Invalid template "${template}". Use: ${TEMPLATE_TYPES.join(", ")}`);
      process.exit(1);
    }

    const platformStr = opts.platform as string;
    const platforms = platformStr.split(",").map((p: string) => p.trim());
    const invalidPlatforms = platforms.filter((p: string) => !PLATFORM_PRESET_KEYS.includes(p as any));
    if (invalidPlatforms.length > 0) {
      console.error(`Error: Invalid platform(s): ${invalidPlatforms.join(", ")}. Use: ${PLATFORM_PRESET_KEYS.join(", ")}`);
      process.exit(1);
    }

    const config = loadConfig(opts.config);

    // Collect data from source or read from file
    let text: string | undefined;
    let sourceArgs: Record<string, string> | undefined;

    if (opts.source) {
      // Data-source collection now happens inside the text module (generateDocument),
      // which reads config.collect[source]. Just pass the source name + args.
      sourceArgs = {};
      if (opts.sourceOwner) sourceArgs.owner = opts.sourceOwner;
      if (opts.sourceRepo) sourceArgs.repo = opts.sourceRepo;
      if (Object.keys(sourceArgs).length === 0) sourceArgs = undefined;
      console.log(`Collecting from ${opts.source} (inside text module)...`);
    } else {
      if (!input) {
        console.error("Error: <input> file path is required when --source is not provided");
        process.exit(1);
      }
      const inputPath = resolve(input);
      if (!existsSync(inputPath)) {
        console.error(`Error: Input file not found: ${inputPath}`);
        process.exit(1);
      }
      text = readFileSync(inputPath, "utf-8");
    }

    const providerName = opts.ttsProvider || config?.tts?.provider || "openai-tts";
    const providerConfig = config?.tts?.[providerName];

    const cliDir = dirname(new URL(import.meta.url).pathname);
    const projectRoot = resolve(cliDir, "../../../../");
    const templatesEntry = resolve(projectRoot, "packages/templates/src/entry.ts");
    const assetsRoot = resolve(projectRoot, "assets");
    const inputDir = opts.assetsDir ? resolve(opts.assetsDir) : resolve(process.cwd());

    const noTts = skipTts(opts);
    const noPublish = skipPublish(opts);
    const flags: string[] = [];
    if (noTts) flags.push("no-tts");
    if (noPublish) flags.push("no-publish");

    // Unified output directory (honors OUTPUT_DIR env > config > ./output).
    const outputDir = resolveOutputDir(opts.output || config?.output?.dir);
    const retentionDays = Number(
      process.env.OUTPUT_RETENTION_DAYS ?? config?.output?.retentionDays ?? 30
    );
    const publish = noPublish ? undefined : resolvePublishConfig(config);

    const runConfig: DocumentRunConfig = {
      branding: {
        channelName: opts.channelName || config?.branding?.channelName || "Pipeline",
      },
      llm: {
        baseURL: opts.llmBaseUrl || config?.llm?.baseURL,
        apiKey: opts.llmApiKey || config?.llm?.apiKey,
        // Model resolution (flag > LLM_MODEL env > config) lives in core's
        // runDocument — clients only forward the pieces.
        model: config?.llm?.model,
      },
      tts: {
        provider: providerName,
        voiceId: opts.voice || providerConfig?.defaultVoice,
        model: opts.ttsModel || providerConfig?.model,
        format: opts.ttsFormat || config?.tts?.format || "mp3",
        speed: opts.ttsSpeed || config?.tts?.speed || 1.0,
        alignment: buildAlignmentConfig(opts, config),
      },
      output: { dir: outputDir, retentionDays },
      publish,
      publishMeta: config?.publishMeta,
      collect: config?.collect,
      state: { coveredWindowDays: config?.state?.coveredWindowDays },
      assets: { root: assetsRoot, inputDir },
      templates: { entryPoint: templatesEntry },
    };

    const stages = ["text", "audio", "render"];

    console.log(`\nPipeline: generating ${template} video for ${platforms.join(", ")}`);
    // When --source is used, text is undefined here — the collected content
    // (markdown fed to the LLM) only materializes inside the text module, so
    // there is no char count to show yet. Log the source name instead of the
    // misleading length of a "(source)" placeholder.
    const inputLabel =
      text !== undefined
        ? `${text.length} chars`
        : `source "${opts.source}" (content collected inside text module)`;
    console.log(`Input: ${inputLabel}${flags.length ? " | Flags: " + flags.join(", ") : ""}\n`);

    // Surface publish resolution so a misconfigured OSS/Feishu is obvious.
    if (noPublish) {
      console.log("Publish: skipped (--no-publish)");
    } else if (publish) {
      console.log(`Publish: oss=${publish.oss ? "on" : "off"} feishu=${publish.feishu ? "on" : "off"}`);
    } else {
      console.log("Publish: skipped (no OSS/Feishu configured)");
    }

    const result = await runDocument(
      {
        text,
        source: opts.source,
        sourceArgs,
        template: template as any,
        platforms: platforms as any,
        ttsProvider: providerName as any,
        voiceId: runConfig.tts.voiceId,
        skipTts: noTts,
        skipLlm: opts.skipLlm,
        skipPublish: noPublish,
        llmModel: opts.llmModel,
      },
      runConfig,
      {
        onStage: (stage) => {
          const stepNum = stages.indexOf(stage) + 1;
          const labels: Record<string, string> = {
            text: opts.skipLlm ? "Generating document (JSON input)" : "Generating document (AI text)",
            audio: noTts ? "Generating silent audio" : `Generating narration${runConfig.tts.alignment?.provider === "whisper" ? " (whisper alignment)" : ""}`,
            render: "Rendering video (Remotion)",
          };
          console.log(`  [${stepNum}/${stages.length}] ${labels[stage] || stage}...`);
        },
      }
    );

    if (result.status === "completed" && result.files.length > 0) {
      console.log(`\nCompleted! Job ID: ${result.jobId}`);
      for (const file of result.files) {
        console.log(`  -> ${file.filePath} (${(file.fileSizeBytes / 1024 / 1024).toFixed(1)}MB, ${file.width}x${file.height})`);
        if (file.ossUrl) console.log(`  oss: ${file.ossUrl}`);
      }
      if (result.stateError) {
        console.error(`\nState warning (dedup degraded): ${result.stateError}`);
      }
      if (result.publishError) {
        console.error(`\nPublish warning: ${result.publishError}`);
      }
    } else {
      console.error(`\nFailed: ${result.error}`);
      process.exit(1);
    }
  } catch (err) {
    // Expected pipeline errors (source/template mismatch, missing config,
    // collector failures...) — print the message cleanly, no stack trace.
    console.error(`\nFailed: ${err instanceof Error ? err.message : String(err)}`);
    process.exit(1);
  }
});

function buildAlignmentConfig(
  opts: any,
  config: Record<string, any> | null
): DocumentRunConfig["tts"]["alignment"] {
  const mode = opts.alignment || config?.tts?.alignment?.provider || config?.alignment?.provider;
  if (mode !== "whisper" && mode !== "native") return undefined;
  return {
    provider: mode,
    whisperModel: opts.whisperModel || config?.tts?.alignment?.whisperModel || config?.alignment?.whisperModel || "base",
    language: opts.alignmentLanguage || config?.tts?.alignment?.language || config?.alignment?.language,
  };
}

function loadConfig(configPath?: string): Record<string, any> | null {
  const cliDir = dirname(new URL(import.meta.url).pathname);
  const projectRoot = resolve(cliDir, "../../../../");

  const paths = [
    configPath,
    "pipeline.config.yaml",
    "pipeline.config.yml",
    resolve(projectRoot, "config/default.yaml"),
    "config/default.yaml",
  ].filter(Boolean) as string[];

  for (const p of paths) {
    const resolved = resolve(p);
    if (existsSync(resolved)) {
      const content = readFileSync(resolved, "utf-8");
      return parseYaml(content);
    }
  }
  return null;
}