//! Config access: cached KDL config lookup, color/font/dimension readers,
 //! and resolution of the ccectl binary.
 //!
 //! Every key is read by an explicit JSON pointer — the canonical nesting in
 //! config.kdl. A key at a non-canonical location simply does not resolve.
 //! (The legacy fuzzy search that split snake_case keys across nesting was
 //! deleted after a release of quiet fallback-warning logs.)
 //!
 //! Color space: text colors stay **raw sRGB** — they end up as `[u8; 3]` for
 //! cosmic-text (see `StyledLabel`), which expects sRGB. Quad/box colors are
 //! converted with [`cce_ui::color::srgb_to_linear`] because the Vulkan pipeline
 //! samples them in linear space.
 
 pub(crate) fn get_cached_config() -> serde_json::Value {
     cce_ui::config::cached_config()
 }
 
 fn cfg_f32(pointer: &str) -> Option<f32> {
     get_cached_config().pointer(pointer).and_then(|v| v.as_f64()).map(|n| n as f32)
 }
 
 fn cfg_string(pointer: &str) -> Option<String> {
     get_cached_config().pointer(pointer).and_then(|v| v.as_str()).map(|s| s.to_string())
 }
 
 /// A text color: raw sRGB RGB with alpha forced to 1.0 (cosmic-text consumes
 /// text colors as sRGB `[u8; 3]`; alpha is not carried by the text path).
 pub(crate) fn text_color_from(val: &serde_json::Value, pointer: &str) -> Option<[f32; 4]> {
     let s = val.pointer(pointer)?.as_str()?;
     let [r, g, b, _] = cce_ui::color::parse_hex_rgba(s)?;
     Some([r, g, b, 1.0])
 }
 
 /// A quad/box color: RGB converted sRGB→linear for the Vulkan pipeline, alpha
 /// kept raw.
 pub(crate) fn quad_color_from(val: &serde_json::Value, pointer: &str) -> Option<[f32; 4]> {
     let s = val.pointer(pointer)?.as_str()?;
     cce_ui::color::parse_hex_rgba_linear(s)
 }
 
 fn cfg_text_color(pointer: &str) -> Option<[f32; 4]> {
     text_color_from(&get_cached_config(), pointer)
 }
 
 fn cfg_quad_color(pointer: &str) -> Option<[f32; 4]> {
     quad_color_from(&get_cached_config(), pointer)
 }
 
 pub(crate) fn read_normal_color_from_config() -> Option<[f32; 4]> {
     // App-native `module { text_color }` first (a TEXT color — raw sRGB, per
     // the color-space split in CLAUDE.md), then the shared status key.
     cfg_text_color("/module/text_color")
         .or_else(|| cfg_text_color("/style/status/normal_color"))
 }
 
 pub(crate) fn read_disabled_color_from_config() -> Option<[f32; 4]> {
     cfg_text_color("/style/status/disabled_color")
 }
 
 pub(crate) fn read_status_font_from_config() -> String {
     // App-native `module { font }` first (a family; an embedded size ranks
     // below module { font_size } in the size chain), then the shared key.
     if let Some(font_str) = cfg_string("/module/font") {
         return font_str;
     }
     if let Some(font_str) = cfg_string("/style/status/font") {
         return font_str;
     }
 
     // The third rung used to be fontconfig's `status-interface` alias — a cce
     // invention squatting in fontconfig's family namespace, and one this
     // precedence chain had already demoted to a last resort. It is gone along
     // with the settings app's Fonts page; the DE's families now live in the
     // shared config's `fonts { }` block.
     cce_ui::layout::read_preferred_fonts().0
 }
 
 pub(crate) fn read_status_height_from_config() -> f32 {
     // App-native `module { height }` first — the compositor reads the same
     // key for the arrange pass's segment height and reserved strip, so the
     // two sides always agree — then the shared layout { bar_height }.
     cfg_f32("/module/height")
         .or_else(|| cfg_f32("/layout/bar_height"))
         .unwrap_or(28.0)
 }
 
 pub(crate) fn read_status_font_size_from_config() -> f32 {
     // App-native `module { font_size }` wins over everything — including the
     // size embedded in the shared font string ("Chivo Mono 14"), which stays
     // the fallback along with the shared status_font_size key.
     if let Some(size) = cfg_f32("/module/font_size") {
         return size;
     }
     if let Some(font_str) = cfg_string("/module/font") {
         let (_, parsed_size) = cce_ui::layout::parse_font_string(&font_str);
         if let Some(size) = parsed_size {
             return size;
         }
     }
     if let Some(font_str) = cfg_string("/style/status/font") {
         let (_, parsed_size) = cce_ui::layout::parse_font_string(&font_str);
         if let Some(size) = parsed_size {
             return size;
         }
     }
 
     cfg_f32("/style/status/font_size").unwrap_or(11.0)
 }
 
 pub(crate) fn read_status_padding_from_config() -> f32 {
     // App-native `module { padding }` first (the text inset inside each
     // module box — bar-side only), then the shared status key.
     cfg_f32("/module/padding")
         .or_else(|| cfg_f32("/style/status/padding"))
         .unwrap_or(8.0)
 }
 
 pub(crate) fn read_status_module_spacing_from_config() -> f32 {
     // App-native `module { spacing }` first (the same value the compositor
     // reads for the gap BETWEEN segments — this reader only matters for the
     // intra-surface layout of a multi-module bar), then the shared key.
     cfg_f32("/module/spacing")
         .or_else(|| cfg_f32("/style/status/module_spacing"))
         .unwrap_or(8.0)
 }
 
 
 /// The DE-wide light angle, canonical at `window_manager { light_source_position }`.
 /// Radians normally; a value above 2π is taken as legacy degrees (e.g. `135`)
 /// and converted. (This unifies the two previous readers, one of which only
 /// degree-converted integer values.)
 pub(crate) fn light_source_position_from(val: &serde_json::Value) -> f32 {
     let raw = val
         .pointer("/window_manager/light_source_position")
         .and_then(|v| v.as_f64())
         .map(|f| f as f32)
         .unwrap_or(2.356_194_5); // 135°, the compositor default
     if raw > 2.0 * std::f32::consts::PI {
         raw.to_radians()
     } else {
         raw
     }
 }
 
 pub(crate) fn read_light_source_position_from_config() -> f32 {
     light_source_position_from(&get_cached_config())
 }
 
 pub(crate) fn read_status_background_blur_from_config() -> f32 {
     cfg_f32("/style/status/background_blur").unwrap_or(0.0)
 }
 
 pub(crate) fn read_status_box_background_color_from_config() -> Option<[f32; 4]> {
     // App-native `module { background_color }` first (a quad color — the
     // sRGB→linear conversion applies, per the color-space split in
     // CLAUDE.md), then the shared status key, then the built-in default.
     let mut color = cfg_quad_color("/module/background_color")
         .or_else(|| cfg_quad_color("/style/status/background_color"))
         .unwrap_or_else(|| {
             let c = cce_ui::color::srgb_to_linear(0x15 as f32 / 255.0);
             let b = cce_ui::color::srgb_to_linear(0x20 as f32 / 255.0);
             [c, c, b, 0.9]
         });
 
     let blur = read_status_background_blur_from_config();
 
     // Scale RGB by (1.0 - blur) to apply tint factor while keeping alpha as full opacity for the blur shader
     color[0] *= 1.0 - blur;
     color[1] *= 1.0 - blur;
     color[2] *= 1.0 - blur;
 
     Some(color)
 }
 
 /// `module { droplet "sag=0.45 belly=0.75 gleam=1.2 ..." }` — the water-drop
 /// module style ([`cce_ui::scene::paint::Prim::Droplet`]). The key's PRESENCE
 /// turns the style on (an empty string takes every default); its value is
 /// whitespace-separated `k=v` pairs onto [`DropletSpec`]'s fields, in the DE's
 /// spec-string idiom. Unknown keys warn and are skipped, so a typo shows up in
 /// the log instead of silently reverting one knob.
 pub(crate) fn read_droplet_from_config() -> Option<cce_ui::scene::paint::DropletSpec> {
     // The parser is shared with the compositor (whose scenefx droplet node
     // refracts the backdrop behind each segment from the same spec).
     Some(cce_ui::scene::paint::DropletSpec::parse(&cfg_string("/module/droplet")?))
 }
 
 /// `module { text_raise }` — lifts module text above vertical center by this
 /// many logical px (negative lowers it). Bar-side only; every module's text
 /// baseline funnels through `centered_text_y`, which subtracts this.
 pub(crate) fn read_text_raise_from_config() -> f32 {
     cfg_f32("/module/text_raise").unwrap_or(0.0)
 }
 
 /// `module { icon_size }` — the glyph height, logical px, for the modules
 /// that read out as a cce-icons glyph beside their value (cpu, memory,
 /// brightness, volume, battery). Default `TRAY_ICON_SIZE`: the readout
 /// glyphs and the tray icons share the strip and read as one set only at
 /// one size (bar height − 6 was tried first and read a size larger).
 pub(crate) fn read_icon_size_from_config() -> f32 {
     cfg_f32("/module/icon_size").unwrap_or(TRAY_ICON_SIZE).max(4.0)
 }
 
 /// The tray's icon size, logical px — fixed, and what the readout glyphs
 /// default to.
 pub(crate) const TRAY_ICON_SIZE: f32 = 16.0;
 
 /// `module { icon_font_size }` — the size of the number beside a glyph.
 /// Defaults to the module font size, so the readouts match the clock.
 pub(crate) fn read_icon_font_size_from_config(font_size: f32) -> f32 {
     cfg_f32("/module/icon_font_size").unwrap_or(font_size).max(1.0)
 }
 
 /// `module { icon_gap }` — logical px between a glyph and its number
 /// (default 4). Narrower than `icon_spacing` so each pair reads as one.
 pub(crate) fn read_icon_gap_from_config() -> f32 {
     cfg_f32("/module/icon_gap").unwrap_or(4.0).max(0.0)
 }
 
 /// `module { icon_spacing }` — logical px between readouts sharing a bubble
 /// (the `stats` segment). Defaults to the gap between segments, so the
 /// combined bubble is spaced like the strip it replaced.
 pub(crate) fn read_icon_spacing_from_config() -> f32 {
     cfg_f32("/module/icon_spacing")
         .unwrap_or_else(read_status_module_spacing_from_config)
         .max(0.0)
 }
 
 /// `module { icon_weight }` — OpenType weight of the number beside a glyph
 /// (700 = bold); unset leaves the face's regular, like every other label.
 pub(crate) fn read_icon_weight_from_config() -> Option<u16> {
     cfg_f32("/module/icon_weight").map(|w| w.clamp(1.0, 1000.0) as u16)
 }
 
 /// `module { icon_alpha }` — opacity 0-1 of the glyph (default 1). The
 /// glyph is tinted the number's color, so this is the one lever for making
 /// it read lighter than the digits.
 pub(crate) fn read_icon_alpha_from_config() -> f32 {
     cfg_f32("/module/icon_alpha").unwrap_or(1.0).clamp(0.0, 1.0)
 }
 
 pub(crate) fn read_status_box_corner_radius_from_config() -> f32 {
     // App-native ONLY (~/.config/cce/cce-status-interface/config.kdl,
     // merged over the shared config by cce-ui): `module { corner_radius }`.
     // Unlike the other module styling keys there is deliberately no shared
     // `style { status ... }` fallback — the radius is purely bar-side
     // cosmetics (the old `status_box_corner_radius` rung was removed).
     cfg_f32("/module/corner_radius").unwrap_or(4.0)
 }
 
 /// Bevel treatment for the module boxes.
 #[derive(Clone, Copy, PartialEq, Debug)]
 pub(crate) enum StatusBoxBevel {
     /// A lit plate lip — the box rises out of the bar.
     Raised,
     /// A carved recess rim — the box sinks into the bar.
     Inset,
 }
 
 /// `style { status box_bevel="raised"|"inset" }`; absent, `"none"`, or any
 /// other value keeps the flat boxes.
 pub(crate) fn read_status_box_bevel_from_config() -> Option<StatusBoxBevel> {
     match cfg_string("/style/status/box_bevel")?.to_ascii_lowercase().as_str() {
         "raised" => Some(StatusBoxBevel::Raised),
         "inset" => Some(StatusBoxBevel::Inset),
         _ => None,
     }
 }
 
 /// `style { status box_bevel_depth=(f64)N }` — the roll width of the bevel lip
 /// in logical px. The DE-wide `bevel_width` (~9px) is window-scale; module
 /// boxes in a ~24px bar want a much tighter lip.
 pub(crate) fn read_status_box_bevel_depth_from_config() -> f32 {
     cfg_f32("/style/status/box_bevel_depth").unwrap_or(3.0)
 }
 
 pub(crate) fn get_ccectl_cmd() -> String {
     if let Ok(home) = std::env::var("HOME") {
         let path = format!("{}/.local/bin/ccectl", home);
         if std::path::Path::new(&path).exists() {
             return path;
         }
     }
     "ccectl".to_string()
 }
 
 #[cfg(test)]
 mod tests {
     use super::*;
 
     fn assert_rgba_close(actual: [f32; 4], expected: [f32; 4]) {
         for i in 0..4 {
             assert!(
                 (actual[i] - expected[i]).abs() < 1e-3,
                 "channel {} differs: actual {:?} vs expected {:?}",
                 i,
                 actual,
                 expected
             );
         }
     }
 
     fn parse_kdl(content: &str) -> serde_json::Value {
         cce_ui::config::parse_kdl_to_json(content)
     }
 
     #[test]
     fn test_status_config() {
         let val = parse_kdl(
             r##"
 style {
     status normal_color=(color)"#ccccd8" background_color=(color)"#151520e6" background_blur=(f64)0.8 font="Berkeley Mono 14"
 }
 "##,
         );
 
         assert_eq!(
             val.pointer("/style/status/background_color").and_then(|v| v.as_str()),
             Some("#151520e6")
         );
         assert_eq!(
             val.pointer("/style/status/background_blur").and_then(|v| v.as_f64()),
             Some(0.8)
         );
         assert_eq!(
             val.pointer("/style/status/font").and_then(|v| v.as_str()),
             Some("Berkeley Mono 14")
         );
     }
 
     #[test]
     fn test_box_bevel_config() {
         let val = parse_kdl(
             r##"
 style {
     status box_bevel="raised" box_bevel_depth=(f64)2.5
 }
 "##,
         );
         assert_eq!(
             val.pointer("/style/status/box_bevel").and_then(|v| v.as_str()),
             Some("raised")
         );
         assert_eq!(
             val.pointer("/style/status/box_bevel_depth").and_then(|v| v.as_f64()),
             Some(2.5)
         );
     }
 
     // --- pointer-only lookup ---
 
     #[test]
     fn non_canonical_locations_do_not_resolve() {
         // A key parked somewhere other than its canonical nesting is simply
         // absent — the fuzzy search that used to find these is gone.
         let val = serde_json::json!({"stray": {"status_normal_color": "#222222"}});
         assert!(text_color_from(&val, "/style/status/normal_color").is_none());
     }
 
     // --- light_source_position ---
 
     #[test]
     fn light_source_position_canonical_and_units() {
         // Canonical location, radians as-is.
         let val = parse_kdl("window_manager {\n    light_source_position (f64)2.5\n}");
         assert!((light_source_position_from(&val) - 2.5).abs() < 1e-6);
 
         // A value above 2π is legacy degrees.
         let val = parse_kdl("window_manager {\n    light_source_position (f64)135.0\n}");
         assert!((light_source_position_from(&val) - 135.0f32.to_radians()).abs() < 1e-6);
 
         // Absent: the compositor's 135° default.
         let val = serde_json::json!({});
         assert!((light_source_position_from(&val) - 2.356_194_5).abs() < 1e-6);
     }
 
     // --- color space (spec: text = raw sRGB, quads = linearized) ---
 
     #[test]
     fn text_colors_stay_srgb_and_quad_colors_are_linearized() {
         let val = parse_kdl(
             r##"
 style {
     status normal_color=(color)"#808080" background_color=(color)"#80808080"
 }
 "##,
         );
         let raw = 128.0f32 / 255.0;
         let linear = cce_ui::color::srgb_to_linear(raw);
 
         // Text color: raw sRGB, alpha forced to 1.0 (cosmic-text takes sRGB u8).
         let text = text_color_from(&val, "/style/status/normal_color").unwrap();
         assert_rgba_close(text, [raw, raw, raw, 1.0]);
 
         // Quad color: RGB linearized for the Vulkan pipeline, alpha raw.
         let quad = quad_color_from(&val, "/style/status/background_color").unwrap();
         assert_rgba_close(quad, [linear, linear, linear, raw]);
     }
 }