#![allow(non_snake_case)]

use lazy_static::lazy_static;
use regex::Regex;
use serde::{Deserialize, Serialize};
use yew::prelude::*;
use yewdux::prelude::*;

use crate::components::callbacks::transfer_menu_callbacks;
use plate_tool_lib::transfer_region::Region;
use plate_tool_lib::util::{letters_to_num, num_to_letters};

use super::states::{CurrentTransfer, MainState};

#[function_component]
pub fn TransferMenu() -> Html {
    let (main_state, main_dispatch) = use_store::<MainState>();
    let (ct_state, ct_dispatch) = use_store::<CurrentTransfer>();

    let on_name_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_name_change_callback(ct_dispatch)
    };

    let on_src_region_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_src_region_change_callback(ct_dispatch)
    };

    let on_dest_region_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_dest_region_change_callback(ct_dispatch)
    };

    let on_source_interleave_x_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_source_interleave_x_change_callback(ct_dispatch)
    };

    let on_source_interleave_y_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_source_interleave_y_change_callback(ct_dispatch)
    };
    let on_dest_interleave_x_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_dest_interleave_x_change_callback(ct_dispatch)
    };

    let on_dest_interleave_y_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_dest_interleave_y_change_callback(ct_dispatch)
    };

    let on_volume_change = {
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::on_volume_change_callback(ct_dispatch)
    };

    let new_transfer_button_callback = {
        let main_dispatch = main_dispatch.clone();
        let main_state = main_state.clone();
        let ct_dispatch = ct_dispatch.clone();
        transfer_menu_callbacks::new_transfer_button_callback_callback(
            main_dispatch,
            main_state,
            ct_dispatch,
        )
    };

    let save_transfer_button_callback = {
        let main_dispatch = main_dispatch.clone();
        let main_state = main_state.clone();
        let ct_state = ct_state.clone();
        let new_transfer_button_callback = new_transfer_button_callback.clone();
        transfer_menu_callbacks::save_transfer_button_callback_callback(
            main_dispatch,
            main_state,
            ct_state,
            new_transfer_button_callback,
        )
    };

    let delete_transfer_button_callback = {
        let main_state = main_state.clone();
        let main_dispatch = main_dispatch.clone();
        let ct_state = ct_state.clone();
        let new_transfer_button_callback = new_transfer_button_callback.clone();
        transfer_menu_callbacks::delete_transfer_button_callback(
            main_state,
            main_dispatch,
            ct_state,
            new_transfer_button_callback,
        )
    };

    html! {
        <div class="transfer_menu">
            <form>
            <div>
                <label for="name"><h3>{"Name:"}</h3></label>
                <input type="text" name="name"
                onchange={on_name_change}
                value={ct_state.transfer.name.clone()}/>
            </div>
            // Anything below here is not rendered when a Custom transfer is selected
            if !matches!(&ct_state.transfer.transfer_region.source_region, Region::Custom(_)) {
            <div>
                <label for="src_region"><h3>{"Source Region:"}</h3></label>
                <input type="text" name="src_region"
                onchange={on_src_region_change}
                value={RegionDisplay::from(&ct_state.transfer.transfer_region.source_region).text}/>
            </div>
            <div>
                <label for="dest_region"><h3>{"Destination Region:"}</h3></label>
                <input type="text" name="dest_region"
                onchange={on_dest_region_change}
                value={RegionDisplay::from(&ct_state.transfer.transfer_region.dest_region).text}/>
            </div>
            <div>
            <h3>{"Source Interleave "}</h3>
            <label for="source_interleave_x">{"Row:"}</label>
            <input type="number" name="source_interleave_x"
            onchange={on_source_interleave_x_change}
            value={ct_state.transfer.transfer_region.interleave_source.0.to_string()}/>
            <label for="source_interleave_y">{"Col:"}</label>
            <input type="number" name="source_interleave_y"
            onchange={on_source_interleave_y_change}
            value={ct_state.transfer.transfer_region.interleave_source.1.to_string()}/>
            </div>
            <div>
            <h3>{"Destination Interleave "}</h3>
            <label for="dest_interleave_x">{"Row:"}</label>
            <input type="number" name="dest_interleave_x"
            onchange={on_dest_interleave_x_change}
            value={ct_state.transfer.transfer_region.interleave_dest.0.to_string()}/>
            <label for="dest_interleave_y">{"Col:"}</label>
            <input type="number" name="dest_interleave_y"
            onchange={on_dest_interleave_y_change}
            value={ct_state.transfer.transfer_region.interleave_dest.1.to_string()}/>
            </div>
            <div>
            <label for="volume"><h3>{"Volume"}</h3></label>
            <input type="number" name="volume" class="volume_input"
            min="0" step="0.1"
            onchange={on_volume_change}
            value={ct_state.transfer.volume.to_string()}/>
            </div>
            }
            <div id="controls">
            <input type="button" name="new_transfer" onclick={new_transfer_button_callback}
            value={"New"} />
            <input type="button" name="save_transfer" onclick={save_transfer_button_callback}
            value={"Save"} />
            <input type="button" name="delete_transfer" onclick={delete_transfer_button_callback}
            value={"Delete"} />
            </div>
            </form>
        </div>
    }
}

#[derive(PartialEq, Eq, Debug, Clone, Default, Serialize, Deserialize)]
pub struct RegionDisplay {
    pub text: String,
    pub col_start: u8,
    pub row_start: u8,
    pub col_end: u8,
    pub row_end: u8,
}

impl TryFrom<String> for RegionDisplay {
    type Error = &'static str;

    fn try_from(value: String) -> Result<Self, Self::Error> {
        lazy_static! {
            static ref REGION_REGEX: Regex = Regex::new(r"([A-Z]+)(\d+):([A-Z]+)(\d+)").unwrap();
        }
        if let Some(captures) = REGION_REGEX.captures(&value) {
            if captures.len() != 5 {
                return Err("Not enough capture groups");
            }
            let col_start = letters_to_num(&captures[1]).ok_or("Column start failed to parse")?;
            let col_end = letters_to_num(&captures[3]).ok_or("Column end failed to parse")?;
            let row_start: u8 = captures[2]
                .parse::<u8>()
                .or(Err("Row start failed to parse"))?;
            let row_end: u8 = captures[4]
                .parse::<u8>()
                .or(Err("Row end failed to parse"))?;
            Ok(RegionDisplay {
                text: value,
                col_start,
                row_start,
                col_end,
                row_end,
            })
        } else {
            Err("Regex match failed")
        }
    }
}
impl TryFrom<&str> for RegionDisplay {
    type Error = &'static str;

    fn try_from(value: &str) -> Result<Self, Self::Error> {
        lazy_static! {
            static ref REGION_REGEX: Regex = Regex::new(r"([A-Z]+)(\d+):([A-Z]+)(\d+)").unwrap();
        }
        if let Some(captures) = REGION_REGEX.captures(value) {
            if captures.len() != 5 {
                return Err("Not enough capture groups");
            }
            let col_start = letters_to_num(&captures[1]).ok_or("Column start failed to parse")?;
            let col_end = letters_to_num(&captures[3]).ok_or("Column end failed to parse")?;
            let row_start: u8 = captures[2]
                .parse::<u8>()
                .or(Err("Row start failed to parse"))?;
            let row_end: u8 = captures[4]
                .parse::<u8>()
                .or(Err("Row end failed to parse"))?;
            Ok(RegionDisplay {
                text: value.to_string(),
                col_start,
                row_start,
                col_end,
                row_end,
            })
        } else {
            Err("Regex match failed")
        }
    }
}
impl From<&Region> for RegionDisplay {
    fn from(value: &Region) -> Self {
        match *value {
            Region::Point((col, row)) => {
                RegionDisplay::try_from((col, row, col, row)).ok().unwrap()
            }
            Region::Rect(c1, c2) => RegionDisplay::try_from((c1.0, c1.1, c2.0, c2.1))
                .ok()
                .unwrap(),
            Region::Custom(_) => RegionDisplay {
                text: "CUSTOM".to_string(),
                col_start: 0,
                row_start: 0,
                col_end: 0,
                row_end: 0,
            },
        }
    }
}
impl From<&RegionDisplay> for Region {
    fn from(value: &RegionDisplay) -> Self {
        if value.col_start == value.col_end && value.row_start == value.row_end {
            Region::Point((value.col_start, value.row_start))
        } else {
            Region::Rect(
                (value.col_start, value.row_start),
                (value.col_end, value.row_end),
            )
        }
    }
}
impl TryFrom<(u8, u8, u8, u8)> for RegionDisplay {
    type Error = &'static str;

    fn try_from(value: (u8, u8, u8, u8)) -> Result<Self, Self::Error> {
        // (Column Start, Row Start, Column End, Row End)
        // This can only possibly fail if one of the coordinates is zero...
        let cs = num_to_letters(value.0).ok_or("Column start failed to parse")?;
        let ce = num_to_letters(value.2).ok_or("Column end failed to parse")?;
        Ok(RegionDisplay {
            text: format!("{}{}:{}{}", cs, value.1, ce, value.3),
            col_start: value.0,
            row_start: value.1,
            col_end: value.2,
            row_end: value.3,
        })
    }
}

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

    use super::*;

    #[test]
    #[wasm_bindgen_test]
    fn test_try_from_string_for_regiondisplay() {
        let desired = RegionDisplay {
            text: "A1:E5".to_string(),
            row_start: 1,
            row_end: 5,
            col_start: 1,
            col_end: 5,
        };
        assert_eq!(desired, "A1:E5".to_string().try_into().unwrap());
    }
}