import fs from "fs";
import path from "path";
import { BoothConfig, BoothStyle } from "@/types/booth";

export const GENERATION_MODEL_MAP: Record<string, { primary: string; backup: string }> = {
  "nanobanana 2": {
    primary: "gemini-3.1-flash-image",
    backup: "google/gemini-3.1-flash-image",
  },
  "nanobanana": {
    primary: "gemini-2.5-flash-image",
    backup: "google/gemini-2.5-flash-image",
  },
  "lite": {
    primary: "gemini-3.1-flash-lite-image",
    backup: "google/gemini-3.1-flash-lite-image",
  },
  "nanobanana 2 lite": {
    primary: "gemini-3.1-flash-lite-image",
    backup: "google/gemini-3.1-flash-lite-image",
  },
  "pro": {
    primary: "gemini-3-pro-image",
    backup: "google/gemini-3-pro-image",
  },
  "nanobanana pro": {
    primary: "gemini-3-pro-image",
    backup: "google/gemini-3-pro-image",
  },
};

export function resolveGenerationModels(): { primary: string; backup: string } {
  const envModel = (process.env.GENERATION_MODEL || "").trim().toLowerCase();
  if (envModel && GENERATION_MODEL_MAP[envModel]) {
    return GENERATION_MODEL_MAP[envModel];
  }
  return GENERATION_MODEL_MAP["nanobanana 2"];
}

const defaultConfig: BoothConfig = {
  appName: "Spooky Hand · 万圣空手",
  kioskMode: true,
  theme: {
    backgroundType: "color",
    backgroundColor: "#0b0714",
    primaryColor: "#ff6d00",
    accentColor: "#06b6d4",
    surfaceColor: "#170f29",
    textColor: "#ffffff",
    logoUrl: "/assets/brand/shanghai_karate_logo.png",
    logoWidth: 260,
  },
  camera: {
    defaultFacingMode: "user",
    aspectRatio: "9:16",
    countdownSeconds: 3,
    allowUpload: true,
    maxUploadSizeMb: 10,
  },
  features: {
    showQrCode: true,
    showDownloadButton: true,
    showPrintButton: false,
    showRetakeButton: true,
    showInstagramShare: false,
  },
  limits: {
    maxGenerationsPerDevice: 0,
    cooldownMinutes: 60,
  },
  ai: {
    primary: {
      provider: "gemini",
      model: "gemini-3.1-flash-image",
      timeoutMs: 28000,
    },
    backup: {
      provider: "openrouter",
      model: "google/gemini-3.1-flash-image",
      timeoutMs: 30000,
    },
    cooldownDurationMinutes: 10,
    enableSfwCheck: true,
  },
  kiosk: {
    enableAutoReset: true,
    idleTimeoutSeconds: 90,
  },
  labels: {
    welcomeBadge: {
      en: "SHANGHAI KARATE CLUB • EST. 2008",
      zh: "上海健志空手道馆 · 始于2008",
    },
    welcomeTitle: {
      en: "SPOOKY HAND 🥋🎃",
      zh: "万圣“空手”道馆 🥋🎃",
    },
    welcomeSubtitle: {
      en: "Channel Your Spooky Ki & Martial Pose!",
      zh: "凝聚万圣气合，定格武道英姿！",
    },
    welcomeDesc: {
      en: "Strike your fiercest martial arts pose! Turn your Halloween costume or karate gi into an epic Shanghai legend.",
      zh: "摆出你最帅气的武道姿势！无论身穿万圣盛装还是空手道服，一键变身魔都万圣武道传奇！",
    },
    welcomeCta: {
      en: "Enter The Haunted Dojo! ⚡",
      zh: "开启万圣武道之旅！⚡",
    },
    cameraInstruction: {
      en: "Strike a punch, block, or karate victory pose!",
      zh: "摆出冲拳、格挡或胜利姿态，展现你的气魄！",
    },
    cameraSnap: {
      en: "Snap Martial Shot",
      zh: "拍摄武道照",
    },
    cameraUpload: {
      en: "Upload Photo",
      zh: "上传照片",
    },
    confirmTitle: {
      en: "Review Your Martial Shot",
      zh: "确认你的英姿",
    },
    retakeButton: {
      en: "Retake",
      zh: "重拍",
    },
    confirmButton: {
      en: "Looks Epic! Choose Style",
      zh: "超帅气！选择风格",
    },
    styleSelectionTitle: {
      en: "Select Your Halloween Kata",
      zh: "选择你的万圣奥义风格",
    },
    styleSelectionSubtitle: {
      en: "Choose your legendary martial transformation",
      zh: "挑选专属的万圣节武道变身效果",
    },
    confirmStyleButton: {
      en: "Cast Martial Magic ⚡",
      zh: "施展武道魔法 ⚡",
    },
    backButton: {
      en: "Back",
      zh: "返回",
    },
    processingTitle: {
      en: "Gathering Martial Ki & Spooky Spirits...",
      zh: "正在凝聚万圣之气与道馆灵力...",
    },
    processingSubtitle: {
      en: "Summoning Huangpu mist, pumpkin embers & black belt magic...",
      zh: "融合黄浦江晨雾、南瓜火光与黑带武道魔法...",
    },
    resultTitle: {
      en: "Your Spooky Martial Portrait! 🥋🎃",
      zh: "你的万圣武道神采！🥋🎃",
    },
    scanQrLabel: {
      en: "Scan to save to your phone",
      zh: "扫码保存至手机相册",
    },
    downloadLabel: {
      en: "Save Portrait",
      zh: "保存高清照",
    },
    wechatSaveTip: {
      en: "In WeChat: Long press photo above to save directly!",
      zh: "微信提示：长按上方图片即可直接保存到相册！",
    },
    printLabel: {
      en: "Print Photo",
      zh: "打印照片",
    },
    startOverLabel: {
      en: "Train Again (Start Over)",
      zh: "再拍一张",
    },
    instagramShareLabel: {
      en: "Share Photo",
      zh: "分享照片",
    },
  },
};

export function getBoothConfig(): BoothConfig {
  try {
    const configPath = path.join(process.cwd(), "config", "booth.config.json");
    const resolvedModels = resolveGenerationModels();

    if (fs.existsSync(configPath)) {
      const fileContent = fs.readFileSync(configPath, "utf-8");
      const parsed = JSON.parse(fileContent);

      const primaryModel =
        process.env.GENERATION_MODEL ||
        parsed.ai?.primary?.model === "gemini-2.5-flash" ||
        !parsed.ai?.primary?.model
          ? resolvedModels.primary
          : parsed.ai.primary.model;

      const backupModel =
        process.env.GENERATION_MODEL ||
        parsed.ai?.backup?.model === "google/gemini-2.5-flash" ||
        !parsed.ai?.backup?.model
          ? resolvedModels.backup
          : parsed.ai.backup.model;

      return {
        ...defaultConfig,
        ...parsed,
        ai: {
          ...defaultConfig.ai,
          ...(parsed.ai || {}),
          primary: {
            ...defaultConfig.ai.primary,
            ...(parsed.ai?.primary || {}),
            model: primaryModel,
          },
          backup: {
            ...defaultConfig.ai.backup,
            ...(parsed.ai?.backup || {}),
            model: backupModel,
          },
        },
        labels: {
          ...defaultConfig.labels,
          ...(parsed.labels || {}),
        },
      };
    }
  } catch (error) {
    console.warn("Could not load booth.config.json, using fallback configuration:", error);
  }

  return defaultConfig;
}

export function getBoothStyles(): BoothStyle[] {
  try {
    const stylesPath = path.join(process.cwd(), "config", "styles.json");
    if (fs.existsSync(stylesPath)) {
      const fileContent = fs.readFileSync(stylesPath, "utf-8");
      return JSON.parse(fileContent);
    }
  } catch (error) {
    console.warn("Could not load styles.json, returning empty list:", error);
  }
  return [];
}