-- Paper Tonic Modern - Color Palette
-- Extracted from original Paper Tonic colorscheme
-- Supports both light (paper-like) and dark modes

local M = {}

-- Color format: { hex, 256-color, ansi }
-- hex: Hexadecimal color code for GUI (GVim/MacVim/terminal with true color)
-- 256: Integer 0-255 for 256-color terminals
-- ansi: ANSI color name for basic 16-color terminals

-- Detect current background mode
local is_dark = vim.o.background == 'dark'

-- ============================================================================
-- Background Colors
-- ============================================================================

if is_dark then
  -- Dark mode: soft dark backgrounds
  M.bg = {'#1a1a1a', 234, 'black'}
  M.bg_darkest = {'#ffffff', 255, 'white'}  -- Inverted: lightest for strong contrast
  M.bg_ui = {'#2a2a2a', 236, 'darkgray'}
else
  -- Light mode: pure white paper
  M.bg = {'#ffffff', 255, 'white'}
  M.bg_darkest = {'#505050', 244, 'gray'}
  M.bg_ui = {'#efefef', 0, 'darkgray'}
end

-- ============================================================================
-- Highlight Backgrounds (general)
-- ============================================================================

if is_dark then
  -- Dark mode: lighter backgrounds for highlights
  M.bg_hl_strong = {"#3a3a3a", 237, "darkgray"}
  M.bg_hl = {"#2a2a2a", 236, "darkgray"}
  M.bg_hl_weak = {"#252525", 235, "darkgray"}
  
  -- Special highlight backgrounds (cyan/blue tones)
  M.bg_hl_special_strong = {"#1a4a5a", 24, "darkblue"}
  M.bg_hl_special = {"#0a3a4a", 23, "darkblue"}
  M.bg_hl_special_weak = {"#1a3545", 23, "darkblue"}
  
  -- Alternative special highlight (green tones)
  M.bg_hl_special_alt_strong = {"#1a5a2a", 28, "darkgreen"}
  M.bg_hl_special_alt = {"#0a4a1a", 22, "darkgreen"}
else
  -- Light mode: neutral gray tones
  M.bg_hl_strong = {"#dddddd", 17, "white"}
  M.bg_hl = {"#eeeeee", 250, "white"}
  M.bg_hl_weak = {"#f7f2f2", 250, "white"}
  
  -- Special highlight backgrounds (cyan/blue tones)
  M.bg_hl_special_strong = {"#a3e0ff", 17, "cyan"}
  M.bg_hl_special = {"#d4f0ff", 250, "cyan"}
  M.bg_hl_special_weak = {"#e0eaff", 250, "cyan"}
  
  -- Alternative special highlight (green tones)
  M.bg_hl_special_alt_strong = {"#74f283", 17, "cyan"}
  M.bg_hl_special_alt = {"#bff2cd", 250, "cyan"}
end

-- ============================================================================
-- Status Backgrounds (error, success, modified, fail)
-- ============================================================================

if is_dark then
  -- Dark mode: darker tinted backgrounds
  M.bg_error = {'#4a2020', 52, 'darkred'}
  M.bg_error_weak = {'#3a1a1a', 52, 'darkred'}
  M.bg_success = {'#1a3a1a', 22, 'darkgreen'}
  M.bg_modified = {'#1a1a3a', 17, 'darkblue'}
  M.bg_fail = {'#3a1a1a', 52, 'darkred'}
else
  -- Light mode: light tinted backgrounds
  M.bg_error = {'#ffd7d7', 196, 'white'}
  M.bg_error_weak = {'#ffefef', 196, 'white'}
  M.bg_success = {'#e0ece0', 196, 'white'}
  M.bg_modified = {'#e0e0ec', 196, 'white'}
  M.bg_fail = {'#ece0e0', 196, 'white'}
end

-- ============================================================================
-- Foreground Colors (text)
-- ============================================================================

if is_dark then
  -- Dark mode: light text (inverted from light mode)
  M.fg_stronger = {'#e0e0e0', 253, 'white'}     -- Lightest text
  M.fg_strong = {'#c0c0c0', 250, 'white'}       -- Light text
  M.fg = {'#a0a0a0', 248, 'gray'}               -- Normal text (default)
  M.fg_weak = {'#808080', 244, 'gray'}          -- Dimmer text (comments, less important)
  M.fg_weaker = {'#606060', 241, 'darkgray'}    -- Dimmest text (very subtle)
  M.fg_exception = {'#d08080', 174, 'red'}      -- Light reddish for errors/exceptions
else
  -- Light mode: dark text on paper
  M.fg_stronger = {'#444444', 236, 'darkgrey'}  -- Darkest text
  M.fg_strong = {'#666666', 236, 'darkgrey'}    -- Dark text
  M.fg = {'#8c8c8c', 244, 'gray'}               -- Normal text (default)
  M.fg_weak = {'#9d9d9d', 251, 'gray'}          -- Light text (comments, less important)
  M.fg_weaker = {'#bbbbbb', 251, 'gray'}        -- Lightest text (very subtle)
  M.fg_exception = {'#7c4444', 251, 'gray'}     -- Reddish-brown for errors/exceptions
end

-- ============================================================================
-- Status Foreground Colors (Git/Diff - muted natural tones)
-- ============================================================================

if is_dark then
  -- Dark mode: lighter muted tones
  M.success = {'#a0d0a0', 114, 'green'}    -- Success/addition (muted green)
  M.modified = {'#a0a0d0', 110, 'blue'}    -- Modified/change (muted blue)
  M.fail = {'#d0a0a0', 174, 'red'}         -- Fail/deletion (muted red)
else
  -- Light mode: natural muted colors
  M.success = {'#89af89', 196, 'white'}    -- Success/addition (muted green)
  M.modified = {'#8989af', 196, 'white'}   -- Modified/change (muted blue)
  M.fail = {'#af8989', 196, 'white'}       -- Fail/deletion (muted red)
end

-- ============================================================================
-- Quickfix/Location List Diagnostic Colors (Muted tones like git/diff)
-- ============================================================================

if is_dark then
  -- Dark mode: lighter muted tones
  M.qf_error = {'#d07070', 167, 'red'}     -- Error (lighter muted red)
  M.qf_warn = {'#d0a080', 173, 'yellow'}   -- Warning (muted orange)
  M.qf_info = {'#80b0d0', 110, 'blue'}     -- Info (muted blue)
  M.qf_hint = {'#80d0d0', 116, 'cyan'}     -- Hint (lighter muted cyan)
else
  -- Light mode: darker muted tones
  M.qf_error = {'#af3f3f', 196, 'white'}   -- Error (darker muted red for more contrast)
  M.qf_warn = {'#af7f5f', 196, 'white'}    -- Warning (muted orange)
  M.qf_info = {'#5f8faf', 196, 'white'}    -- Info (muted blue)
  M.qf_hint = {'#5fafaf', 196, 'white'}    -- Hint (lighter muted blue)
end

-- ============================================================================
-- Diagnostic/Alert Colors (Fluorescent/Neon - intentionally jarring)
-- ============================================================================

-- These colors are designed to be NOTICED, not blend in with code
-- Fluorescent/neon aesthetic
-- In light mode: bright, synthetic, stands out on white paper ("highlighter marker")
-- In dark mode: slightly toned down but still prominent

if is_dark then
  -- Dark mode: still bright but not as harsh
  M.diag_error = {'#ff4488', 204, 'red'}        -- Bright pink-red
  M.diag_warn = {'#ff8833', 208, 'yellow'}      -- Bright orange
  M.diag_info = {'#44ccff', 81, 'cyan'}         -- Bright cyan
  M.diag_hint = {'#88ddff', 117, 'cyan'}        -- Softer cyan
  M.diag_hint_dark = {'#44aacc', 74, 'cyan'}    -- Medium cyan
  M.diag_weak = {'#ffaa66', 215, 'yellow'}      -- Lighter orange
  
  -- Diagnostic backgrounds
  M.bg_diag_error = {'#3a1a25', 52, 'darkred'}
  M.bg_diag_warn = {'#3a2a1a', 58, 'brown'}
  M.bg_diag_info = {'#1a2a3a', 17, 'darkblue'}
  M.bg_diag_hint = {'#1a2f3a', 23, 'darkblue'}
  
  M.question = {'#44ccff', 81, 'cyan'}
else
  -- Light mode: fluorescent colors for maximum visibility
  M.diag_error = {'#ff0066', 197, 'red'}        -- Hot pink-red (screams "error!")
  M.diag_warn = {'#ff6600', 202, 'red'}         -- Fluorescent orange (warnings)
  M.diag_info = {'#00ccff', 45, 'cyan'}         -- Bright fluorescent cyan (info)
  M.diag_hint = {'#66e0ff', 81, 'cyan'}         -- Softer fluorescent cyan (hint)
  M.diag_hint_dark = {'#0099cc', 38, 'cyan'}    -- Darker cyan for UI elements
  M.diag_weak = {'#ff9933', 208, 'yellow'}      -- Lighter orange (spelling, etc.)
  
  -- Diagnostic backgrounds
  M.bg_diag_error = {'#ffe6f0', 224, 'white'}
  M.bg_diag_warn = {'#fff0e6', 223, 'white'}
  M.bg_diag_info = {'#e6f9ff', 195, 'white'}
  M.bg_diag_hint = {'#f0fcff', 195, 'white'}
  
  M.question = {'#00ccff', 45, 'cyan'}
end

-- ============================================================================
-- Primary Accent Colors (brownish-red tones)
-- ============================================================================

-- Primary accent: For "base" languages
-- Used for: PHP, JavaScript, Python, etc.
if is_dark then
  -- Dark mode: lighter brownish-red tones
  M.primary_stronger = {"#d0a0a0", 181, "white"}
  M.primary_strong = {"#c09090", 181, "white"}
  M.primary = {"#b08080", 138, "gray"}
  M.primary_weak = {"#a07070", 131, "darkgray"}
else
  -- Light mode: darker brownish-red tones
  M.primary_stronger = {"#7f4b4b", 236, "black"}
  M.primary_strong = {"#5a4444", 236, "black"}
  M.primary = {"#6b5555", 244, "gray"}
  M.primary_weak = {"#7c6666", 248, "darkgray"}
end

-- ============================================================================
-- Language-Specific Color Palettes (for mixed-language contexts)
-- ============================================================================

-- IMPORTANT: Each language maintains its color identity regardless of where it appears.
-- A language always uses the same color, whether standalone or embedded in another language.
-- This creates consistent visual language recognition across all contexts.
--
-- Example: In a PHP file with HTML and CSS:
--   - PHP code: primary (brownish-red) - everywhere, including <?php ?> blocks
--   - HTML tags: c3 (blue) - everywhere, whether in .html or embedded in PHP
--   - CSS rules: c2 (green) - everywhere, whether in .css or <style> tags

if is_dark then
  -- Dark mode: lighter tones
  -- Color 2: Green tones - CSS syntax
  M.c2_weak = {"#90d090", 114, "green"}
  M.c2 = {"#70c070", 77, "green"}
  M.c2_strong = {"#50a050", 71, "darkgreen"}
  
  -- Color 3: Blue tones - HTML syntax
  M.c3_weak = {"#80b0e0", 110, "blue"}
  M.c3 = {"#60a0d0", 74, "blue"}
  M.c3_strong = {"#4080b0", 67, "darkblue"}
  
  -- Color 4: Cyan tones - Reserved/Future use
  M.c4_weak = {"#a0d0e0", 152, "cyan"}
  M.c4 = {"#80c0d0", 116, "cyan"}
  M.c4_strong = {"#60a0c0", 74, "darkcyan"}
  
  -- Color 5: Magenta/Pink tones - Template syntax
  M.c5_weak = {"#e080c0", 213, "magenta"}
  M.c5 = {"#d060a0", 170, "magenta"}
  M.c5_strong = {"#b04080", 133, "darkmagenta"}
else
  -- Light mode: darker tones
  -- Color 2: Green tones - CSS syntax
  M.c2_weak = {"#5e955e", 28, "darkgreen"}
  M.c2 = {"#008700", 22, "darkgreen"}
  M.c2_strong = {"#005a00", 22, "darkgreen"}
  
  -- Color 3: Blue tones - HTML syntax
  M.c3_weak = {"#2d78b7", 20, "blue"}
  M.c3 = {"#005faf", 19, "blue"}
  M.c3_strong = {"#004f92", 17, "darkblue"}
  
  -- Color 4: Cyan tones - Reserved/Future use
  M.c4_weak = {"#78b7d5", 20, "blue"}
  M.c4 = {"#56acd7", 19, "blue"}
  M.c4_strong = {"#1596d7", 17, "darkblue"}
  
  -- Color 5: Magenta/Pink tones - Template syntax
  M.c5_weak = {"#e846ac", 164, "magenta"}
  M.c5 = {"#d70087", 164, "magenta"}
  M.c5_strong = {"#ad006d", 164, "magenta"}
end

-- ============================================================================
-- Helper Constants
-- ============================================================================

-- Common constants for transparent/inherited values
M.NONE = 'NONE'
M.FG = 'FG'
M.BG = 'BG'

return M