local ls = require('luasnip')

local s = ls.snippet
local t = ls.text_node

return {
  -- Superscripts
  s(
    { trig = [[\^+]], wordTrig = false },
    t('⁺')
  ),
  s(
    { trig = [[\^-]], wordTrig = false },
    t('⁻')
  ),
  s(
    { trig = [[\^0]], wordTrig = false },
    t('⁰')
  ),
  s(
    { trig = [[\^1]], wordTrig = false },
    t('¹')
  ),
  s(
    { trig = [[\^2]], wordTrig = false },
    t('²')
  ),
  s(
    { trig = [[\^3]], wordTrig = false },
    t('³')
  ),
  s(
    { trig = [[\^4]], wordTrig = false },
    t('⁴')
  ),
  s(
    { trig = [[\^5]], wordTrig = false },
    t('⁵')
  ),
  s(
    { trig = [[\^6]], wordTrig = false },
    t('⁶')
  ),
  s(
    { trig = [[\^7]], wordTrig = false },
    t('⁷')
  ),
  s(
    { trig = [[\^8]], wordTrig = false },
    t('⁸')
  ),
  s(
    { trig = [[\^9]], wordTrig = false },
    t('⁹')
  ),

  -- Subscripts
  s(
    { trig = [[\_+]], wordTrig = false },
    t('₊')
  ),
  s(
    { trig = [[\_-]], wordTrig = false },
    t('₋')
  ),
  s(
    { trig = [[\_0]], wordTrig = false },
    t('₀')
  ),
  s(
    { trig = [[\_1]], wordTrig = false },
    t('₁')
  ),
  s(
    { trig = [[\_2]], wordTrig = false },
    t('₂')
  ),
  s(
    { trig = [[\_3]], wordTrig = false },
    t('₃')
  ),
  s(
    { trig = [[\_4]], wordTrig = false },
    t('₄')
  ),
  s(
    { trig = [[\_5]], wordTrig = false },
    t('₅')
  ),
  s(
    { trig = [[\_6]], wordTrig = false },
    t('₆')
  ),
  s(
    { trig = [[\_7]], wordTrig = false },
    t('₇')
  ),
  s(
    { trig = [[\_8]], wordTrig = false },
    t('₈')
  ),
  s(
    { trig = [[\_9]], wordTrig = false },
    t('₉')
  ),
  s(
    { trig = [[\_a]], wordTrig = false },
    t('ₐ')
  ),
  s(
    { trig = [[\_i]], wordTrig = false },
    t('ᵢ')
  ),
  s(
    { trig = [[\_j]], wordTrig = false },
    t('ⱼ')
  ),
  s(
    { trig = [[\_k]], wordTrig = false },
    t('ₖ')
  ),
  s(
    { trig = [[\_m]], wordTrig = false },
    t('ₘ')
  ),
  s(
    { trig = [[\_n]], wordTrig = false },
    t('ₙ')
  ),

  -- Lists
  s(
    { trig = [[\.]], wordTrig = false },
    t('·')
  ),
  s(
    { trig = [[\circ]], wordTrig = false },
    t('∘')
  ),

  -- Arrows
  s(
    { trig = [[\d]], wordTrig = false },
    t('↓')
  ),
  s(
    { trig = [[\l]], wordTrig = false },
    t('←')
  ),
  s(
    { trig = [[\lr]], wordTrig = false },
    t('↔')
  ),
  s(
    { trig = [[←r]], wordTrig = false },
    t('↔')
  ),
  s(
    { trig = [[\r]], wordTrig = false },
    t('→')
  ),
  s(
    { trig = [[\u]], wordTrig = false },
    t('↑')
  ),

  -- Greek letters
  s(
    { trig = [[\a]], wordTrig = false },
    t('α')
  ),
  s(
    { trig = [[\b]], wordTrig = false },
    t('β')
  ),
  s(
    { trig = [[\g]], wordTrig = false },
    t('γ')
  ),
  s(
    { trig = [[\e]], wordTrig = false },
    t('ε')
  ),
  s(
    { trig = [[\pi]], wordTrig = false },
    t('π')
  ),
  s(
    { trig = [[\s]], wordTrig = false },
    t('σ')
  ),
  s(
    { trig = [[\z]], wordTrig = false },
    t('ζ')
  ),

  -- Other operators
  s(
    { trig = [[\not]], wordTrig = false },
    t('¬')
  ),
  s(
    { trig = [[\and]], wordTrig = false },
    t('∧')
  ),
  s(
    { trig = [[αnd]], wordTrig = false },
    t('∧')
  ),
  s(
    { trig = [[\or]], wordTrig = false },
    t('∨')
  ),
  s(
    { trig = [[\iff]], wordTrig = false },
    t('⇔')
  ),
  s(
    { trig = [[\imp]], wordTrig = false },
    t('⇒')
  ),
  s(
    { trig = [[\cap]], wordTrig = false },
    t('∩')
  ),
  s(
    { trig = [[\cup]], wordTrig = false },
    t('∪')
  ),
  s(
    { trig = [[\leq]], wordTrig = false },
    t('≤')
  ),
  s(
    { trig = [[←eq]], wordTrig = false },
    t('≤')
  ),
  s(
    { trig = [[\geq]], wordTrig = false },
    t('≥')
  ),
  s(
    { trig = [[γeq]], wordTrig = false },
    t('≥')
  ),
  s(
    { trig = [[\in]], wordTrig = false },
    t('∈')
  ),
  s(
    { trig = [[\notin]], wordTrig = false },
    t('∉')
  ),
  s(
    { trig = [[¬in]], wordTrig = false },
    t('∉')
  ),
}