use lazyboy_contracts::{ComputerAction, PointerButton, PointerType, ScrollDirection};

pub fn is_browser_title(title: &str) -> bool {
    let title = title.to_lowercase();
    title.contains("chromium") || title.contains("chrome")
}

use crate::screen::{PRIMARY_DISPLAY, normalize_display};

pub const DISPLAY: &str = PRIMARY_DISPLAY;
pub const HOME: &str = "/home/lazyboy";

fn display_env(display: &str) -> String {
    format!("DISPLAY={}", normalize_display(display))
}

pub fn xdotool_argv(action: &ComputerAction) -> Option<Vec<String>> {
    xdotool_argv_on(PRIMARY_DISPLAY, action)
}

pub fn xdotool_argv_on(display: &str, action: &ComputerAction) -> Option<Vec<String>> {
    let mut argv = vec!["env".into(), display_env(display), "xdotool".into()];
    match action {
        ComputerAction::Pointer {
            x,
            y,
            pointer_type,
            button,
        } => {
            let button_n = match button.unwrap_or(PointerButton::Left) {
                PointerButton::Left => "1",
                PointerButton::Middle => "2",
                PointerButton::Right => "3",
            };
            match pointer_type {
                PointerType::Move => {
                    argv.extend([
                        "mousemove".into(),
                        "--sync".into(),
                        "--".into(),
                        x.to_string(),
                        y.to_string(),
                    ]);
                }
                PointerType::Click => {
                    argv.extend([
                        "mousemove".into(),
                        "--sync".into(),
                        "--".into(),
                        x.to_string(),
                        y.to_string(),
                        "click".into(),
                        "--delay".into(),
                        "40".into(),
                        button_n.into(),
                    ]);
                }
                PointerType::Down => {
                    argv.extend([
                        "mousemove".into(),
                        "--".into(),
                        x.to_string(),
                        y.to_string(),
                        "mousedown".into(),
                        button_n.into(),
                    ]);
                }
                PointerType::Up => {
                    argv.extend([
                        "mousemove".into(),
                        "--".into(),
                        x.to_string(),
                        y.to_string(),
                        "mouseup".into(),
                        button_n.into(),
                    ]);
                }
            }
        }
        ComputerAction::Key { key, modifiers } => {
            let combo = match modifiers {
                Some(items) if !items.is_empty() => format!("{}+{key}", items.join("+")),
                _ => key.clone(),
            };
            argv.extend(["key".into(), "--clearmodifiers".into(), combo]);
        }
        ComputerAction::Clipboard { text } => {
            let quoted = shell_single_quote(text);
            if looks_like_typed_ascii(text) {
                argv.extend([
                    "type".into(),
                    "--delay".into(),
                    "16".into(),
                    "--".into(),
                    text.clone(),
                ]);
            } else {
                return Some(vec![
                    "env".into(),
                    display_env(display),
                    "bash".into(),
                    "-lc".into(),
                    format!(
                        "printf %s {quoted} | xclip -selection clipboard && xdotool key --clearmodifiers ctrl+v"
                    ),
                ]);
            }
        }
        ComputerAction::Scroll { direction, amount } => {
            let button = match direction {
                ScrollDirection::Up => "4",
                ScrollDirection::Down => "5",
            };
            argv.extend([
                "click".into(),
                "--repeat".into(),
                amount.unwrap_or(12).to_string(),
                "--delay".into(),
                "15".into(),
                button.into(),
            ]);
        }
        ComputerAction::Focus { title } => {
            let quoted = shell_single_quote(title);
            return Some(vec![
                "env".into(),
                display_env(display),
                "bash".into(),
                "-lc".into(),
                format!(
                    "wmctrl -a {quoted} || xdotool search --name {quoted} windowactivate --sync windowfocus"
                ),
            ]);
        }
        ComputerAction::Wait { .. }
        | ComputerAction::Open { .. }
        | ComputerAction::Launch { .. }
        | ComputerAction::Ref { .. } => {
            return None;
        }
    }
    Some(argv)
}

fn shell_single_quote(value: &str) -> String {
    format!("'{}'", value.replace('\'', "'\\''"))
}

fn looks_like_typed_ascii(text: &str) -> bool {
    text.len() <= 48
        && text
            .chars()
            .all(|ch| ch.is_ascii() && (!ch.is_control() || ch == '\n' || ch == '\t'))
}

pub fn action_pause_ms(action: &ComputerAction) -> u64 {
    match action {
        ComputerAction::Pointer { pointer_type, .. } => match pointer_type {
            PointerType::Move => 18,
            PointerType::Click => 55,
            PointerType::Down | PointerType::Up => 30,
        },
        ComputerAction::Scroll { .. } => 45,
        ComputerAction::Clipboard { text } if looks_like_typed_ascii(text) => 40,
        ComputerAction::Clipboard { .. } | ComputerAction::Key { .. } => 35,
        ComputerAction::Focus { .. } => 90,
        ComputerAction::Open { .. } | ComputerAction::Launch { .. } => 220,
        ComputerAction::Wait { .. } => 0,
        ComputerAction::Ref { .. } => 55,
    }
}

pub fn pointer_state_command() -> Vec<String> {
    pointer_state_command_on(PRIMARY_DISPLAY)
}

pub fn pointer_state_command_on(display: &str) -> Vec<String> {
    vec![
        "env".into(),
        display_env(display),
        "python3".into(),
        "-c".into(),
        r#"
import json, subprocess
def out(args):
    try:
        return subprocess.check_output(args, stderr=subprocess.DEVNULL, text=True).strip()
    except Exception:
        return ""
vals = {}
for line in out(["xdotool", "getmouselocation", "--shell"]).splitlines():
    if "=" in line:
        key, value = line.split("=", 1)
        vals[key] = value
wid = out(["xdotool", "getactivewindow"])
title = out(["xdotool", "getwindowname", wid]) if wid else ""
print(json.dumps({"x": int(vals.get("X") or 0), "y": int(vals.get("Y") or 0), "id": wid, "title": title}))
"#
        .into(),
    ]
}

pub fn window_list_command() -> Vec<String> {
    window_list_command_on(PRIMARY_DISPLAY)
}

pub fn window_list_command_on(display: &str) -> Vec<String> {
    vec![
        "env".into(),
        display_env(display),
        "python3".into(),
        "-c".into(),
        r#"
import json, subprocess
def out(args):
    try:
        return subprocess.check_output(args, stderr=subprocess.DEVNULL, text=True)
    except Exception:
        return ""
els = []
n = 1
for line in out(["wmctrl", "-lG"]).splitlines():
    parts = line.split(None, 7)
    if len(parts) < 7:
        continue
    try:
        x, y, w, h = int(parts[2]), int(parts[3]), int(parts[4]), int(parts[5])
    except ValueError:
        continue
    if w < 32 or h < 16:
        continue
    title = parts[7].strip() if len(parts) > 7 else parts[6]
    if not title or title in ("Desktop", "xfce4-panel"):
        continue
    els.append({"id": n, "title": title[:80], "kind": "window", "x": max(0, x), "y": max(0, y), "w": w, "h": h})
    n += 1
print(json.dumps(els))
"#
        .into(),
    ]
}

pub fn parse_ui_elements(raw: &str) -> Vec<lazyboy_contracts::UiElement> {
    let value: serde_json::Value =
        serde_json::from_str(raw.trim()).unwrap_or(serde_json::Value::Null);
    let Some(items) = value.as_array() else {
        return Vec::new();
    };
    items
        .iter()
        .filter_map(|item| {
            Some(lazyboy_contracts::UiElement {
                id: item.get("id")?.as_u64()? as u32,
                title: item.get("title")?.as_str()?.to_string(),
                x: item.get("x")?.as_u64()? as u32,
                y: item.get("y")?.as_u64()? as u32,
                w: item.get("w")?.as_u64()? as u32,
                h: item.get("h")?.as_u64()? as u32,
                selector: item
                    .get("selector")
                    .and_then(serde_json::Value::as_str)
                    .filter(|value| !value.is_empty())
                    .map(str::to_string),
                kind: item
                    .get("kind")
                    .and_then(serde_json::Value::as_str)
                    .filter(|value| !value.is_empty())
                    .map(str::to_string),
                role: item
                    .get("role")
                    .and_then(serde_json::Value::as_str)
                    .filter(|value| !value.is_empty())
                    .map(str::to_string),
            })
        })
        .collect()
}

pub fn parse_pointer_state(
    raw: &str,
) -> (
    Option<lazyboy_contracts::CursorPosition>,
    Option<lazyboy_contracts::ActiveWindow>,
) {
    let value: serde_json::Value =
        serde_json::from_str(raw.trim()).unwrap_or(serde_json::Value::Null);
    let cursor = match (
        value.get("x").and_then(serde_json::Value::as_i64),
        value.get("y").and_then(serde_json::Value::as_i64),
    ) {
        (Some(x), Some(y)) => Some(lazyboy_contracts::CursorPosition {
            x: x as i32,
            y: y as i32,
        }),
        _ => None,
    };
    let window = value
        .get("id")
        .and_then(serde_json::Value::as_str)
        .filter(|id| !id.is_empty())
        .map(|id| lazyboy_contracts::ActiveWindow {
            id: id.to_string(),
            title: value
                .get("title")
                .and_then(serde_json::Value::as_str)
                .filter(|title| !title.is_empty())
                .map(str::to_string),
        });
    (cursor, window)
}

pub fn open_argv(path: &str) -> Vec<String> {
    open_argv_on(PRIMARY_DISPLAY, None, path)
}

pub fn open_argv_on(display: &str, profile: Option<&str>, path: &str) -> Vec<String> {
    if path.starts_with("http://") || path.starts_with("https://") {
        return browser_argv(display, profile, Some(path));
    }
    vec![
        "env".into(),
        display_env(display),
        "xdg-open".into(),
        path.into(),
    ]
}

pub fn launch_argv(application: &str, uri: Option<&str>) -> Option<Vec<String>> {
    launch_argv_on(PRIMARY_DISPLAY, None, application, uri)
}

pub fn launch_argv_on(
    display: &str,
    profile: Option<&str>,
    application: &str,
    uri: Option<&str>,
) -> Option<Vec<String>> {
    match application {
        "browser" | "chrome" | "chromium" | "lazyboy-browser" => {
            Some(browser_argv(display, profile, uri))
        }
        "xterm" | "terminal" | "xfce4-terminal" | "lazyboy-terminal" => {
            let mut argv = vec![
                "env".into(),
                display_env(display),
                "lazyboy-terminal".into(),
            ];
            if let Some(uri) = uri {
                argv.push(uri.into());
            }
            Some(argv)
        }
        _ => None,
    }
}

fn browser_argv(display: &str, profile: Option<&str>, uri: Option<&str>) -> Vec<String> {
    let mut argv = vec!["env".into(), display_env(display)];
    if let Some(profile) = profile.filter(|value| !value.is_empty()) {
        argv.push(format!("LAZYBOY_BROWSER_PROFILE={profile}"));
    }
    argv.push("lazyboy-browser".into());
    argv.push(format!(
        "--remote-debugging-port={}",
        crate::devtools_port(display)
    ));
    argv.push("--remote-allow-origins=*".into());
    if let Some(uri) = uri {
        argv.push(uri.into());
    }
    argv
}

pub fn screenshot_command() -> Vec<String> {
    screenshot_command_on(PRIMARY_DISPLAY)
}

pub fn screenshot_command_on(display: &str) -> Vec<String> {
    vec![
        "bash".into(),
        "-lc".into(),
        format!(
            "DISPLAY={} xwd -root -silent | convert xwd:- -quality 60 jpeg:-",
            normalize_display(display)
        ),
    ]
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn click_maps_to_xdotool() {
        let argv = xdotool_argv(&ComputerAction::Pointer {
            x: 12,
            y: 40,
            pointer_type: PointerType::Click,
            button: Some(PointerButton::Left),
        })
        .unwrap();
        assert!(argv.contains(&"click".into()));
        assert!(argv.contains(&"12".into()));
    }

    #[test]
    fn pointer_up_moves_before_release() {
        let argv = xdotool_argv(&ComputerAction::Pointer {
            x: 80,
            y: 90,
            pointer_type: PointerType::Up,
            button: Some(PointerButton::Left),
        })
        .unwrap();
        assert!(argv.contains(&"mousemove".into()));
        assert!(argv.contains(&"80".into()));
        assert!(argv.contains(&"mouseup".into()));
    }

    #[test]
    fn extra_display_is_injected_into_input_commands() {
        let argv = xdotool_argv_on(
            ":2",
            &ComputerAction::Pointer {
                x: 4,
                y: 8,
                pointer_type: PointerType::Move,
                button: None,
            },
        )
        .unwrap();
        assert!(argv.contains(&"DISPLAY=:2".into()));
        let shot = screenshot_command_on(":3");
        assert!(shot.last().unwrap().contains("DISPLAY=:3"));
        assert!(shot.last().unwrap().contains("jpeg:-"));
        let browser = launch_argv_on(
            ":2",
            Some("/home/lazyboy/.browser-profiles/bots/a"),
            "browser",
            None,
        )
        .unwrap();
        assert!(browser.contains(&"DISPLAY=:2".into()));
        assert!(browser.iter().any(|item| item.contains("bots/a")));
        assert!(browser.contains(&"--remote-debugging-port=9223".into()));
    }

    #[test]
    fn parses_window_list_elements() {
        let elements =
            parse_ui_elements(r#"[{"id":1,"title":"Chromium","x":0,"y":24,"w":1280,"h":776}]"#);
        assert_eq!(elements.len(), 1);
        assert_eq!(elements[0].title, "Chromium");
        assert_eq!(elements[0].center(), (640, 412));
    }

    #[test]
    fn parses_dom_element_selector() {
        let elements = parse_ui_elements(
            r#"[{"id":1,"title":"Submit","selector":"[data-lazyboy=\"1\"]","kind":"dom","x":10,"y":20,"w":80,"h":24}]"#,
        );
        assert_eq!(elements[0].kind.as_deref(), Some("dom"));
        assert_eq!(
            elements[0].selector.as_deref(),
            Some("[data-lazyboy=\"1\"]")
        );
    }

    #[test]
    fn parses_a11y_role_and_path() {
        let elements = parse_ui_elements(
            r#"[{"id":2,"title":"push button Open","selector":"0/3/1","kind":"a11y","role":"push button","x":8,"y":9,"w":40,"h":16}]"#,
        );
        assert_eq!(elements[0].kind.as_deref(), Some("a11y"));
        assert_eq!(elements[0].role.as_deref(), Some("push button"));
        assert_eq!(elements[0].selector.as_deref(), Some("0/3/1"));
        assert!(elements[0].has_ref());
    }

    #[test]
    fn browser_titles_match_chromium() {
        assert!(is_browser_title("Example - Chromium"));
        assert!(is_browser_title("chrome"));
        assert!(!is_browser_title("Thunar"));
    }

    #[test]
    fn empty_or_junk_window_list_is_empty() {
        assert!(parse_ui_elements("").is_empty());
        assert!(parse_ui_elements("not-json").is_empty());
    }
}

/// Native clipboard path; text is supplied on stdin, never process arguments.
pub fn paste_command_on(display: &str) -> Vec<String> {
    vec![
        "env".into(),
        display_env(display),
        "python3".into(),
        "-c".into(),
        include_str!("clipboard.py").into(),
    ]
}