pub mod focus;
pub mod mixer;
pub mod plugin;
pub mod sampler;

pub use self::focus::*;

use crate::{core::*, handle, App, AppSection};

handle!(App |self, e| {
    if let Some(ref mut modal) = self.modal {
        if modal.handle(e)? {
            self.modal = None;
            return Ok(true)
        };
    }
    let handle_focused = |state: &mut Self|match state.section {
        AppSection::Grid =>
            handle_keymap(state, e, KEYMAP_GRID),
        AppSection::Sequencer =>
            handle_keymap(state, e, KEYMAP_SEQUENCER),
        AppSection::Chain =>
            handle_keymap(state, e, KEYMAP_CHAIN),
    };
    Ok(if self.entered {
        handle_focused(self)?
            || handle_keymap(self, e, KEYMAP)?
            || handle_keymap(self, e, KEYMAP_FOCUS)?
    } else {
        handle_keymap(self, e, KEYMAP)?
            || handle_keymap(self, e, KEYMAP_FOCUS)? 
            || handle_focused(self)?
    })
});

const KEYMAP_FOCUS: &'static [KeyBinding<App>] = keymap!(App {
    [Tab,   NONE,  "focus_next",  "focus next area",     focus_next],
    [Tab,   SHIFT, "focus_prev",  "focus previous area", focus_prev],
    [Esc,   NONE,  "focus_exit",  "unfocus",                 |app: &mut App|{
        app.entered = false;
        Ok(true)
    }],
    [Enter, NONE,  "focus_enter", "activate item at cursor", |app: &mut App|{
        app.entered = true;
        Ok(true)
    }],
});

const KEYMAP: &'static [KeyBinding<App>] = keymap!(App {

    [F(1), NONE, "help_toggle", "toggle help", |_: &mut App| {Ok(true)}],

    [Up,   NONE, "focus_prev",  "focus previous area", focus_prev],
    [Down, NONE, "focus_next",  "focus next area",     focus_next],

    [Char(' '), NONE, "play_toggle",    "play or pause",    |app: &mut App| {
        app.toggle_play()?;
        Ok(true)
    }],
    [Char('r'), NONE, "record_toggle",  "toggle recording", |app: &mut App| {
        app.track_mut().map(|t|t.1.toggle_record());
        Ok(true)
    }],
    [Char('o'), NONE, "overdub_toggle", "toggle overdub",   |app: &mut App| {
        app.track_mut().map(|t|t.1.toggle_overdub());
        Ok(true)
    }],
    [Char('m'), NONE, "monitor_toggle", "toggle monitor",   |app: &mut App| {
        app.track_mut().map(|t|t.1.toggle_monitor());
        Ok(true)
    }],

    [Char('+'), NONE, "quant_inc", "Quantize coarser", |app: &mut App| {
        app.quant = next_note_length(app.quant);
        Ok(true)
    }],
    [Char('_'), NONE, "quant_dec", "Quantize finer",   |app: &mut App| {
        app.quant = prev_note_length(app.quant);
        Ok(true)
    }],

    [Char('='), NONE, "zoom_in",  "Zoom in",  |app: &mut App| {
        app.time_zoom = prev_note_length(app.time_zoom);
        Ok(true)
    }],
    [Char('-'), NONE, "zoom_out", "Zoom out", |app: &mut App| {
        app.time_zoom = next_note_length(app.time_zoom);
        Ok(true)
    }],

    [Char('x'), NONE, "extend", "double the current clip",   |app: &mut App| {
        if let Some(phrase) = app.phrase_mut() {
            let mut notes = BTreeMap::new();
            for (time, events) in phrase.notes.iter() {
                notes.insert(time + phrase.length, events.clone());
            }
            phrase.notes.append(&mut notes);
            phrase.length = phrase.length * 2;
        }
        Ok(true)
    }],

    [Char('l'), NONE, "loop_toggle",       "toggle looping",            |_app: &mut App| {
        // TODO: This toggles the loop flag for the clip under the cursor.
        Ok(true)
    }],
    [Char('['), NONE, "loop_start_dec",    "move loop start back",      |_app: &mut App| {
        // TODO: This moves the loop start to the previous quant.
        Ok(true)
    }],
    [Char(']'), NONE, "loop_start_inc",    "move loop start forward",   |_app: &mut App| {
        // TODO: This moves the loop start to the next quant.
        Ok(true)
    }],
    [Char('{'), NONE, "loop_end_dec",      "move loop end back",        |_app: &mut App| {
        // TODOO: This moves the loop end to the previous quant.
        Ok(true)
    }],
    [Char('}'), NONE, "loop_end_inc",      "move loop end forward",     |_app: &mut App| {
        // TODO: This moves the loop end to the next quant.
        Ok(true)
    }],


    [Char('a'), CONTROL, "scene_add",      "add a new scene",           |app: &mut App| {
        app.add_scene(None)?;
        Ok(true)
    }],
    [Char('t'), CONTROL, "track_add",      "add a new track",           |app: &mut App| {
        app.add_track(None)?;
        Ok(true)
    }],

    [Char('.'), NONE,    "cursor_inc",       "increment value",          increment],
    [Char(','), NONE,    "cursor_dec",       "decrement value",          decrement],
    [Delete,    CONTROL, "cursor_delete",    "delete item at cursor",    delete],
    [Char('d'), CONTROL, "cursor_duplicate", "duplicate scene or track", duplicate],

    //[Char('r'), CONTROL, "rename",         "rename current element",    rename],
//    [Char('s'), NONE,  "stop_and_rewind", "Stop and rewind",          stop_and_rewind],
});

const KEYMAP_GRID: &'static [KeyBinding<App>] = keymap!(App {
    [Up,    NONE, "grid_cursor_up",    "move cursor up",    |app: &mut App| Ok(match app.grid_mode {
        false => {app.scene_cursor = app.scene_cursor.saturating_sub(1); true},
        true  => {app.track_cursor = app.track_cursor.saturating_sub(1); true},
    })],
    [Down,  NONE, "grid_cursor_down",  "move cursor down",  |app: &mut App| Ok(match app.grid_mode {
        false => {app.scene_cursor = app.scenes.len().min(app.scene_cursor + 1); true},
        true  => {app.track_cursor = app.tracks.len().min(app.track_cursor + 1); true},
    })],
    [Left,  NONE, "grid_cursor_left",  "move cursor left",  |app: &mut App| Ok(match app.grid_mode {
        false => {app.track_cursor = app.track_cursor.saturating_sub(1); true},
        true  => {app.scene_cursor = app.scene_cursor.saturating_sub(1); true},
    })],
    [Right, NONE, "grid_cursor_right", "move cursor right", |app: &mut App| Ok(match app.grid_mode {
        false => {app.track_cursor = app.tracks.len().min(app.track_cursor + 1); true},
        true  => {app.scene_cursor = app.scenes.len().min(app.scene_cursor + 1); true},
    })],
    [Enter, NONE, "grid_activate", "activate item at cursor", |app: &mut App| Ok(
        if app.scene_cursor == 0 {
            false
        } else {
            let scene = &app.scenes[app.scene_cursor - 1];
            if app.track_cursor == 0 {
                for (i, track) in app.tracks.iter_mut().enumerate() {
                    track.sequence = scene.clips[i];
                    track.reset = true;
                }
            } else {
                let track = &mut app.tracks[app.track_cursor - 1];
                track.sequence = scene.clips[app.track_cursor - 1];
                track.reset = true;
            };
            true
        }
    )],
    [Char('.'), NONE, "grid_increment", "increment item at cursor", clip_next],
    [Char(','), NONE, "grid_decrement", "decrement item at cursor", clip_prev],
    [Char('`'), NONE, "grid_mode_switch", "switch the display mode", |app: &mut App| {
        app.grid_mode   = !app.seq_mode;
        Ok(true)
    }],
});

const KEYMAP_SEQUENCER: &'static [KeyBinding<App>] = keymap!(App {
    [Up,    NONE, "seq_cursor_up",    "move cursor up", |app: &mut App| {
        app.note_cursor = app.note_cursor.saturating_sub(1);
        Ok(true)
    }],
    [Down,  NONE, "seq_cursor_down",  "move cursor up", |app: &mut App| {
        app.note_cursor = app.note_cursor + 1;
        Ok(true)
    }],
    [Left,  NONE, "seq_cursor_left",  "move cursor up", |app: &mut App| {
        if app.entered {
            app.time_cursor = app.time_cursor.saturating_sub(1);
        } else {
            app.time_start = app.time_start.saturating_sub(1);
        }
        Ok(true)
    }],
    [Right, NONE, "seq_cursor_right", "move cursor up", |app: &mut App| {
        if app.entered {
            app.time_cursor = app.time_cursor + 1;
        } else {
            app.time_start = app.time_start + 1;
        }
        Ok(true)
    }],
    [Char('`'), NONE, "seq_mode_switch", "switch the display mode", |app: &mut App| {
        app.seq_mode   = !app.seq_mode;
        Ok(true)
    }],
//    [Char('a'), NONE,  "note_add",        "Add note",                 note_add],
//    [Char('z'), NONE,  "note_del",        "Delete note",              note_del],
//    [CapsLock,  NONE,  "advance",         "Toggle auto advance",      nop],
//    [Char('w'), NONE,  "rest",            "Advance by note duration", nop],
});

const KEYMAP_CHAIN: &'static [KeyBinding<App>] = keymap!(App {
    [Up,    NONE, "chain_cursor_up", "move cursor up", |_: &mut App| Ok(true)],
    [Down,  NONE, "chain_cursor_down", "move cursor down", |_: &mut App| Ok(true)],
    [Left,  NONE, "chain_cursor_left", "move cursor left", |app: &mut App| {
        if let Some((_, track)) = app.track_mut() {
            track.device = track.device.saturating_sub(1);
            Ok(true)
        } else {
            Ok(false)
        }
    }],
    [Right, NONE, "chain_cursor_right", "move cursor right", |app: &mut App| {
        if let Some((_, track)) = app.track_mut() {
            track.device = (track.device + 1).min(track.devices.len().saturating_sub(1));
            Ok(true)
        } else {
            Ok(false)
        }
    }],
    [Char('`'), NONE, "chain_mode_switch", "switch the display mode", |app: &mut App| {
        app.chain_mode = !app.seq_mode;
        Ok(true)
    }],
});

fn focus_next (app: &mut App) -> Usually<bool> {
    app.section.next();
    Ok(true)
}

fn focus_prev (app: &mut App) -> Usually<bool> {
    app.section.prev();
    Ok(true)
}

fn increment (app: &mut App) -> Usually<bool> {
    Ok(false)
}

fn clip_next (_: &mut App) -> Usually<bool> { Ok(true) }
//fn clip_next (state: &mut Launcher) -> Usually<bool> {
    //if state.cursor.0 >= 1 && state.cursor.1 >= 1 {
        //let scene_id = state.cursor.1 - 1;
        //let clip_id  = state.cursor.0 - 1;
        //let scene = &mut state.scenes[scene_id];
        //scene.clips[clip_id] = match scene.clips[clip_id] {
            //None => Some(0),
            //Some(i) => if i >= state.tracks[clip_id].sequencer.phrases.len().saturating_sub(1) {
                //None
            //} else {
                //Some(i + 1)
            //}
        //};
    //}
    //Ok(true)
//}

fn decrement (app: &mut App) -> Usually<bool> {
    Ok(false)
}

fn clip_prev (_: &mut App) -> Usually<bool> { Ok(true) }
//fn clip_prev (state: &mut Launcher) -> Usually<bool> {
    //if state.cursor.0 >= 1 && state.cursor.1 >= 1 {
        //let scene_id = state.cursor.1 - 1;
        //let clip_id  = state.cursor.0 - 1;
        //let scene = &mut state.scenes[scene_id];
        //scene.clips[clip_id] = match scene.clips[clip_id] {
            //None => Some(state.tracks[clip_id].sequencer.phrases.len().saturating_sub(1)),
            //Some(i) => if i == 0 {
                //None
            //} else {
                //Some(i - 1)
            //}
        //};
    //}
    //Ok(true)
//}

fn delete (app: &mut App) -> Usually<bool> {
    match app.section {
        AppSection::Grid => delete_track(app),
        _ => Ok(false)
    }
}

fn delete_track (app: &mut App) -> Usually<bool> {
    if app.tracks.len() > 0 {
        let track = app.tracks.remove(app.track_cursor);
        app.track_cursor = app.track_cursor.saturating_sub(1);
        app.jack.as_ref().unwrap().as_client().unregister_port(track.midi_out)?;
        return Ok(true)
    }
    Ok(false)
}

fn duplicate (_: &mut App) -> Usually<bool> { Ok(true) }