/**
 * @file tailwind.config.js
 * @description Tailwind CSS configuration — content globs and the dashboard's
 * dark/light color tokens. Token values live in `src/index.css` as CSS
 * variables (`:root` = light, `.dark` = dark); this file only wires Tailwind
 * class names to them. RGB-triplet vars (not hex) so `<alpha-value>` keeps
 * opacity modifiers like `bg-surface-2/70` working under either theme.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

/**
 * A status/accent FILL is pre-mixed against one fixed base, never translucent.
 *
 * `bg-status-success/10` used to emit `rgb(var(--status-success) / 0.1)`, which
 * composites with whatever is behind it — so the one "success" chip rendered as
 * five different colours over the five surface steps, and washed out badly on
 * the light theme's near-white cards. Mixing against `--tint-base` (the card
 * surface of the active theme) gives an OPAQUE colour: the same chip reads the
 * same on the page, in a card, in a modal and inside an input row.
 *
 * Applied to `backgroundColor`/`borderColor` only. `text-status-warning/80` and
 * `ring-accent/40` stay genuinely translucent — text and rings sit on top of a
 * fill rather than replacing it — and the surface family keeps its alpha too,
 * or every modal scrim would turn solid.
 */
const tint =
  (variable) =>
  ({ opacityValue }) => {
    const alpha = Number(opacityValue);
    // No modifier at all: Tailwind passes `var(--tw-bg-opacity, 1)` here.
    if (!Number.isFinite(alpha) || alpha >= 1) return `rgb(var(${variable}))`;
    return `color-mix(in srgb, rgb(var(${variable})) ${alpha * 100}%, rgb(var(--tint-base)))`;
  };

const tinted = {
  accent: {
    DEFAULT: tint("--accent"),
    hover: tint("--accent-hover"),
    muted: "color-mix(in srgb, rgb(var(--accent)) 15%, rgb(var(--tint-base)))",
  },
  // The fill behind white text (`.btn-primary`, Switch on, Checkbox tick):
  // `--accent` is a TEXT colour, too light in dark themes to carry white.
  "accent-solid": {
    DEFAULT: tint("--accent-solid"),
    hover: tint("--accent-solid-hover"),
  },
  status: {
    success: tint("--status-success"),
    danger: tint("--status-danger"),
    warning: tint("--status-warning"),
  },
  diff: { mod: tint("--diff-mod") },
  kept: tint("--kept"),
};

/** @type {import('tailwindcss').Config} */
export default {
  darkMode: "class",
  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
  theme: {
    extend: {
      colors: {
        surface: {
          0: "rgb(var(--surface-0) / <alpha-value>)",
          1: "rgb(var(--surface-1) / <alpha-value>)",
          2: "rgb(var(--surface-2) / <alpha-value>)",
          3: "rgb(var(--surface-3) / <alpha-value>)",
          4: "rgb(var(--surface-4) / <alpha-value>)",
          5: "rgb(var(--surface-5) / <alpha-value>)",
        },
        border: {
          DEFAULT: "rgb(var(--border) / <alpha-value>)",
          light: "rgb(var(--border-light) / <alpha-value>)",
        },
        accent: {
          DEFAULT: "rgb(var(--accent) / <alpha-value>)",
          hover: "rgb(var(--accent-hover) / <alpha-value>)",
          muted: "rgb(var(--accent) / 0.15)",
        },
        "accent-solid": {
          DEFAULT: "rgb(var(--accent-solid) / <alpha-value>)",
          hover: "rgb(var(--accent-solid-hover) / <alpha-value>)",
        },
        fg: {
          primary: "rgb(var(--fg-primary) / <alpha-value>)",
          secondary: "rgb(var(--fg-secondary) / <alpha-value>)",
          muted: "rgb(var(--fg-muted) / <alpha-value>)",
        },
        syntax: {
          comment: "rgb(var(--syn-comment) / <alpha-value>)",
          string: "rgb(var(--syn-string) / <alpha-value>)",
          number: "rgb(var(--syn-number) / <alpha-value>)",
          keyword: "rgb(var(--syn-keyword) / <alpha-value>)",
          builtin: "rgb(var(--syn-builtin) / <alpha-value>)",
          function: "rgb(var(--syn-function) / <alpha-value>)",
          operator: "rgb(var(--syn-operator) / <alpha-value>)",
          punctuation: "rgb(var(--syn-punctuation) / <alpha-value>)",
          property: "rgb(var(--syn-property) / <alpha-value>)",
          tag: "rgb(var(--syn-tag) / <alpha-value>)",
          plain: "rgb(var(--syn-plain) / <alpha-value>)",
          add: "rgb(var(--syn-add) / <alpha-value>)",
          del: "rgb(var(--syn-del) / <alpha-value>)",
        },
        status: {
          success: "rgb(var(--status-success) / <alpha-value>)",
          danger: "rgb(var(--status-danger) / <alpha-value>)",
          warning: "rgb(var(--status-warning) / <alpha-value>)",
        },
        diff: { mod: "rgb(var(--diff-mod) / <alpha-value>)" },
        kept: "rgb(var(--kept) / <alpha-value>)",
      },
      backgroundColor: tinted,
      borderColor: tinted,
      // Text a step heavier than stock: regular (and `font-normal`) is 500.
      fontWeight: { normal: "500" },
      fontFamily: {
        sans: ["Inter", "-apple-system", "BlinkMacSystemFont", "Segoe UI", "sans-serif"],
        mono: ["JetBrains Mono", "Fira Code", "Consolas", "monospace"],
        // Tailwind's stock stack minus Georgia: Windows picks Georgia, which has
        // no precomposed Vietnamese glyphs, so Chrome splits "ế" into "ê" + a
        // tone mark it cannot place and the chat reads "Chuyê ́n".
        serif: ["ui-serif", "Cambria", "Times New Roman", "Times", "serif"],
      },
      animation: {
        // Status indicators pulse a few times and rest (never `infinite`: an
        // always-on animation keeps the browser drawing 60 frames a second).
        "pulse-slow": "pulse 3s cubic-bezier(0.4, 0, 0.6, 1) 3",
        ping: "ping 1s cubic-bezier(0, 0, 0.2, 1) 4",
        "fade-in": "fadeIn 0.3s ease-out",
        "slide-up": "slideUp 0.3s ease-out",
      },
      keyframes: {
        fadeIn: {
          "0%": { opacity: "0" },
          "100%": { opacity: "1" },
        },
        slideUp: {
          "0%": { opacity: "0", transform: "translateY(8px)" },
          "100%": { opacity: "1", transform: "translateY(0)" },
        },
      },
    },
  },
  plugins: [],
};