use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};

use crate::app::View;

pub enum Action {
  Quit,
  NavigateUp,
  NavigateDown,
  NavigateLeft,
  NavigateRight,
  Select,
  Back,
  Search,
  Import,
  Delete,
  DeleteSelected,
  Open,
  TagView,
  CollectionView,
  AuditView,
  SettingsView,
  DuplicatesView,
  DatabaseView,
  QueueView,
  StatisticsView,
  TasksView,
  BooksView,
  ScanTrigger,
  Refresh,
  NextTab,
  PrevTab,
  PageUp,
  PageDown,
  GoTop,
  GoBottom,
  CreateTag,
  TagMedia,
  UntagMedia,
  Help,
  Edit,
  Vacuum,
  Toggle,
  RunNow,
  Save,
  Char(char),
  Backspace,
  // Multi-select actions
  ToggleSelection,
  SelectAll,
  ClearSelection,
  ToggleSelectionMode,
  BatchDelete,
  ConfirmBatchDelete,
  BatchTag,
  UpdateReadingProgress,
  // Playlists
  PlaylistsView,
  CreatePlaylist,
  DeletePlaylist,
  RemoveFromPlaylist,
  ShufflePlaylist,
  AddToPlaylist,
  // Social / detail
  ToggleFavorite,
  RateMedia,
  AddComment,
  EnrichMedia,
  ToggleSubtitles,
  // Transcode
  ToggleTranscodes,
  CancelTranscode,
  // Admin
  AdminView,
  AdminTabNext,
  AdminTabPrev,
  DeleteUser,
  DeleteDevice,
  TestWebhook,
  None,
}

#[expect(
  clippy::missing_const_for_fn,
  reason = "match arms return non-trivially constructed enum variants"
)]
pub fn handle_key(
  key: KeyEvent,
  in_input_mode: bool,
  current_view: View,
) -> Action {
  if in_input_mode {
    match (key.code, key.modifiers) {
      (KeyCode::Esc, _) => Action::Back,
      (KeyCode::Enter, _) => Action::Select,
      (KeyCode::Char('s'), KeyModifiers::CONTROL) => {
        match current_view {
          View::MetadataEdit => Action::Save,
          _ => Action::Select,
        }
      },
      (KeyCode::Char(c), _) => Action::Char(c),
      (KeyCode::Backspace, _) => Action::Backspace,
      _ => Action::None,
    }
  } else {
    match (key.code, key.modifiers) {
      (KeyCode::Char('q'), _) | (KeyCode::Char('c'), KeyModifiers::CONTROL) => {
        Action::Quit
      },
      (KeyCode::Up | KeyCode::Char('k'), _) => Action::NavigateUp,
      (KeyCode::Down | KeyCode::Char('j'), _) => Action::NavigateDown,
      (KeyCode::Left | KeyCode::Char('h'), _) => Action::NavigateLeft,
      (KeyCode::Right | KeyCode::Char('l'), _) => Action::NavigateRight,
      (KeyCode::Home, _) => Action::GoTop,
      (KeyCode::End, _) => Action::GoBottom,
      (KeyCode::Enter, _) => Action::Select,
      (KeyCode::Esc, _) => Action::Back,
      (KeyCode::Char('/'), _) => Action::Search,
      (KeyCode::Char('?'), _) => Action::Help,
      (KeyCode::Char('i'), _) => Action::Import,
      (KeyCode::Char('d'), _) => {
        match current_view {
          View::Tags | View::Collections => Action::DeleteSelected,
          View::Playlists => Action::DeletePlaylist,
          View::Admin => Action::DeleteUser,
          _ => Action::Delete,
        }
      },
      (KeyCode::Char('o'), _) => Action::Open,
      (KeyCode::Char('e'), _) => {
        match current_view {
          View::Detail => Action::Edit,
          _ => Action::None,
        }
      },
      (KeyCode::Char('p'), _) => {
        match current_view {
          View::Detail => Action::UpdateReadingProgress,
          _ => Action::PlaylistsView,
        }
      },
      (KeyCode::Char('t'), _) => {
        match current_view {
          View::Tasks => Action::Toggle,
          View::Detail => Action::ToggleTranscodes,
          _ => Action::TagView,
        }
      },
      (KeyCode::Char('c'), _) => {
        match current_view {
          View::Detail => Action::AddComment,
          _ => Action::CollectionView,
        }
      },
      // Multi-select: Ctrl+A for SelectAll (must come before plain 'a')
      (KeyCode::Char('a'), KeyModifiers::CONTROL) => {
        match current_view {
          View::Library | View::Search => Action::SelectAll,
          _ => Action::None,
        }
      },
      (KeyCode::Char('a'), _) => Action::AuditView,
      (KeyCode::Char('b'), _) => Action::BooksView,
      (KeyCode::Char('S'), _) => {
        match current_view {
          View::Playlists => Action::ShufflePlaylist,
          _ => Action::SettingsView,
        }
      },
      (KeyCode::Char('B'), _) => Action::DatabaseView,
      (KeyCode::Char('Q'), _) => Action::QueueView,
      (KeyCode::Char('X'), _) => Action::StatisticsView,
      (KeyCode::Char('A'), _) => Action::AdminView,
      // Use plain D/T for views in non-library contexts, keep for batch ops in
      // library/search
      (KeyCode::Char('D'), _) => {
        match current_view {
          View::Library | View::Search => Action::BatchDelete,
          View::Admin => Action::DeleteDevice,
          _ => Action::DuplicatesView,
        }
      },
      (KeyCode::Char('T'), _) => {
        match current_view {
          View::Library | View::Search => Action::BatchTag,
          _ => Action::TasksView,
        }
      },
      // Ctrl+S must come before plain 's' to ensure proper precedence
      (KeyCode::Char('s'), KeyModifiers::CONTROL) => {
        match current_view {
          View::MetadataEdit => Action::Save,
          _ => Action::None,
        }
      },
      (KeyCode::Char('s'), _) => Action::ScanTrigger,
      (KeyCode::Char('r'), _) => Action::Refresh,
      (KeyCode::Char('n'), _) => {
        match current_view {
          View::Playlists => Action::CreatePlaylist,
          _ => Action::CreateTag,
        }
      },
      (KeyCode::Char('+'), _) => {
        match current_view {
          View::Library | View::Search => Action::AddToPlaylist,
          _ => Action::TagMedia,
        }
      },
      (KeyCode::Char('-'), _) => {
        match current_view {
          View::Playlists => Action::RemoveFromPlaylist,
          _ => Action::UntagMedia,
        }
      },
      (KeyCode::Char('v'), _) => {
        match current_view {
          View::Database => Action::Vacuum,
          _ => Action::ToggleSelectionMode,
        }
      },
      (KeyCode::Char('x'), _) => {
        match current_view {
          View::Tasks => Action::RunNow,
          View::Detail => Action::CancelTranscode,
          _ => Action::None,
        }
      },
      (KeyCode::Char('f'), _) => {
        match current_view {
          View::Detail => Action::ToggleFavorite,
          _ => Action::None,
        }
      },
      (KeyCode::Char('R'), _) => {
        match current_view {
          View::Detail => Action::RateMedia,
          _ => Action::None,
        }
      },
      (KeyCode::Char('E'), _) => {
        match current_view {
          View::Detail => Action::EnrichMedia,
          _ => Action::None,
        }
      },
      (KeyCode::Char('U'), _) => {
        match current_view {
          View::Detail => Action::ToggleSubtitles,
          _ => Action::None,
        }
      },
      (KeyCode::Char('w'), _) => {
        match current_view {
          View::Admin => Action::TestWebhook,
          _ => Action::None,
        }
      },
      (KeyCode::Tab, _) => {
        match current_view {
          View::Admin => Action::AdminTabNext,
          _ => Action::NextTab,
        }
      },
      (KeyCode::BackTab, _) => {
        match current_view {
          View::Admin => Action::AdminTabPrev,
          _ => Action::PrevTab,
        }
      },
      (KeyCode::PageUp, _) => Action::PageUp,
      (KeyCode::PageDown, _) => Action::PageDown,
      // Multi-select keys
      (KeyCode::Char(' '), _) => {
        match current_view {
          View::Library | View::Search => Action::ToggleSelection,
          _ => Action::None,
        }
      },
      (KeyCode::Char('u'), _) => {
        match current_view {
          View::Library | View::Search => Action::ClearSelection,
          _ => Action::None,
        }
      },
      _ => Action::None,
    }
  }
}