-- Paper Tonic Modern - LSP Highlight Groups
-- LSP diagnostics, references, and UI elements

local c = require('paper-tonic-modern.colors')

return {
  -- ============================================================================
  -- LSP Diagnostics
  -- ============================================================================
  
  -- Error diagnostics (red)
  DiagnosticError = { fg = c.alert_strong },  -- Bright red #d70000
  DiagnosticUnderlineError = { sp = c.alert_strong, undercurl = true },
  DiagnosticSignError = { fg = c.alert_strong, bg = c.bg },
  DiagnosticFloatingError = { fg = c.alert_strong },
  DiagnosticVirtualTextError = { fg = c.alert_strong, bg = c.bg_error_weak },
  
  -- Warning diagnostics (orange)
  DiagnosticWarn = { fg = c.alert },  -- Orange-red #d75f00
  DiagnosticUnderlineWarn = { sp = c.alert, undercurl = true },
  DiagnosticSignWarn = { fg = c.alert, bg = c.bg },
  DiagnosticFloatingWarn = { fg = c.alert },
  DiagnosticVirtualTextWarn = { fg = c.alert, bg = c.bg_fail },
  
  -- Info diagnostics (blue)
  DiagnosticInfo = { fg = c.modified },  -- Blue #8989af
  DiagnosticUnderlineInfo = { sp = c.modified, underline = true },
  DiagnosticSignInfo = { fg = c.modified, bg = c.bg },
  DiagnosticFloatingInfo = { fg = c.modified },
  DiagnosticVirtualTextInfo = { fg = c.modified, bg = c.bg_modified },
  
  -- Hint diagnostics (green)
  DiagnosticHint = { fg = c.success },  -- Green #89af89
  DiagnosticUnderlineHint = { sp = c.success, underline = true },
  DiagnosticSignHint = { fg = c.success, bg = c.bg },
  DiagnosticFloatingHint = { fg = c.success },
  DiagnosticVirtualTextHint = { fg = c.success, bg = c.bg_success },
  
  -- ============================================================================
  -- LSP References (document highlight)
  -- ============================================================================
  
  -- Text under cursor (current symbol)
  LspReferenceText = { bg = c.bg_hl_special_weak },  -- Subtle cyan #e0eaff
  
  -- Read references (where symbol is read)
  LspReferenceRead = { bg = c.bg_hl_special },  -- Cyan #d4f0ff
  
  -- Write references (where symbol is written/modified)
  LspReferenceWrite = { bg = c.bg_hl_special_strong },  -- Strong cyan #a3e0ff
  
  -- ============================================================================
  -- LSP Signature Help
  -- ============================================================================
  
  LspSignatureActiveParameter = { fg = c.primary_strong, bold = true },
  
  -- ============================================================================
  -- LSP Semantic Tokens (fallback groups)
  -- ============================================================================
  
  -- These are fallback groups for LSP semantic tokens
  -- TreeSitter groups take precedence when both are available
  ['@lsp.type.class'] = '@type',
  ['@lsp.type.decorator'] = '@function',
  ['@lsp.type.enum'] = '@type',
  ['@lsp.type.enumMember'] = '@constant',
  ['@lsp.type.function'] = '@function',
  ['@lsp.type.interface'] = '@type',
  ['@lsp.type.macro'] = '@macro',
  ['@lsp.type.method'] = '@function.method',
  ['@lsp.type.namespace'] = '@module',
  ['@lsp.type.parameter'] = '@variable.parameter',
  ['@lsp.type.property'] = '@property',
  ['@lsp.type.struct'] = '@type',
  ['@lsp.type.type'] = '@type',
  ['@lsp.type.typeParameter'] = '@type',
  ['@lsp.type.variable'] = '@variable',
}