import { get, writable } from "svelte/store";
import { DataBase, setDatabase } from "../storage/database";
import { downloadFile } from "../storage/globalApi";
import { BufferToText, selectSingleFile } from "../util";
import { alertError } from "../alert";
import { isLite } from "../lite";
import { CustomCSSStore, SafeModeStore } from "../stores";

export interface ColorScheme{
    bgcolor: string;
    darkbg: string;
    borderc: string;
    selected: string;
    draculared: string;
    textcolor: string;
    textcolor2: string;
    darkBorderc: string;
    darkbutton: string;
    type:'light'|'dark';
}


export const defaultColorScheme: ColorScheme = {
    bgcolor: "#282a36",
    darkbg: "#21222c",
    borderc: "#6272a4",
    selected: "#44475a",
    draculared: "#ff5555",
    textcolor: "#f8f8f2",
    textcolor2: "#64748b",
    darkBorderc: "#4b5563",
    darkbutton: "#374151",
    type:'dark'
}

const colorShemes = {
    "default": defaultColorScheme,
    "light": {
        bgcolor: "#f0f0f0",
        darkbg: "#ffffff",
        borderc: "#0f172a",
        selected: "#e0e0e0",
        draculared: "#ff5555",
        textcolor: "#0f172a",
        textcolor2: "#64748b",
        darkBorderc: "#d1d5db",
        darkbutton: "#e5e7eb",
        type:'light'
    },
    "cherry": {
        bgcolor: "#450a0a",
        darkbg: "#7f1d1d",
        borderc: "#ea580c",
        selected: "#d97706",
        draculared: "#ff5555",
        textcolor: "#f8f8f2",
        textcolor2: "#fca5a5",
        darkBorderc: "#92400e",
        darkbutton: "#b45309",
        type:'dark'
    },
    "galaxy": {
        bgcolor: "#0f172a",
        darkbg: "#1f2a48",
        borderc: "#8be9fd",
        selected: "#457b9d",
        draculared: "#ff5555",
        textcolor: "#f8f8f2",
        textcolor2: "#8be9fd",
        darkBorderc: "#457b9d",
        darkbutton: "#1f2a48",
        type:'dark'
    },
    "nature": {
        bgcolor: "#1b4332",
        darkbg: "#2d6a4f",
        borderc: "#a8dadc",
        selected: "#4d908e",
        draculared: "#ff5555",
        textcolor: "#f8f8f2",
        textcolor2: "#4d908e",
        darkBorderc: "#457b9d",
        darkbutton: "#2d6a4f",
        type:'dark'
    },
    "realblack": {
        bgcolor: "#000000",
        darkbg: "#000000",
        borderc: "#6272a4",
        selected: "#44475a",
        draculared: "#ff5555",
        textcolor: "#f8f8f2",
        textcolor2: "#64748b",
        darkBorderc: "#4b5563",
        darkbutton: "#374151",
        type:'dark'
    }

} as const

export const ColorSchemeTypeStore = writable('dark' as 'dark'|'light')

export const colorSchemeList = Object.keys(colorShemes) as (keyof typeof colorShemes)[]

export function changeColorScheme(colorScheme: string){
    let db = get(DataBase)
    if(colorScheme !== 'custom'){
        db.colorScheme = structuredClone(colorShemes[colorScheme])
    }
    db.colorSchemeName = colorScheme
    setDatabase(db)
    updateColorScheme()
}

export function updateColorScheme(){
    let db = get(DataBase)

    let colorScheme = db.colorScheme

    if(colorScheme == null){
        colorScheme = structuredClone(defaultColorScheme)
    }

    if(get(isLite)){
        colorScheme = structuredClone(colorShemes.light)
    }

    //set css variables
    document.documentElement.style.setProperty("--risu-theme-bgcolor", colorScheme.bgcolor);
    document.documentElement.style.setProperty("--risu-theme-darkbg", colorScheme.darkbg);
    document.documentElement.style.setProperty("--risu-theme-borderc", colorScheme.borderc);
    document.documentElement.style.setProperty("--risu-theme-selected", colorScheme.selected);
    document.documentElement.style.setProperty("--risu-theme-draculared", colorScheme.draculared);
    document.documentElement.style.setProperty("--risu-theme-textcolor", colorScheme.textcolor);
    document.documentElement.style.setProperty("--risu-theme-textcolor2", colorScheme.textcolor2);
    document.documentElement.style.setProperty("--risu-theme-darkborderc", colorScheme.darkBorderc);
    document.documentElement.style.setProperty("--risu-theme-darkbutton", colorScheme.darkbutton);
    ColorSchemeTypeStore.set(colorScheme.type)
}

export function exportColorScheme(){
    let db = get(DataBase)
    let json = JSON.stringify(db.colorScheme)
    downloadFile('colorScheme.json', json)
}

export async function importColorScheme(){
    const uarray = await selectSingleFile(['json'])
    if(uarray == null){
        return
    }
    const string = BufferToText(uarray.data)
    let colorScheme: ColorScheme
    try{
        colorScheme = JSON.parse(string)
        if(
            typeof colorScheme.bgcolor !== 'string' ||
            typeof colorScheme.darkbg !== 'string' ||
            typeof colorScheme.borderc !== 'string' ||
            typeof colorScheme.selected !== 'string' ||
            typeof colorScheme.draculared !== 'string' ||
            typeof colorScheme.textcolor !== 'string' ||
            typeof colorScheme.textcolor2 !== 'string' ||
            typeof colorScheme.darkBorderc !== 'string' ||
            typeof colorScheme.darkbutton !== 'string' ||
            typeof colorScheme.type !== 'string'
        ){
            alertError('Invalid color scheme')
            return
        }
        changeColorScheme('custom')
        let db = get(DataBase)
        db.colorScheme = colorScheme
        setDatabase(db)
        updateColorScheme()
    }
    catch(e){
        alertError('Invalid color scheme')
        return
    
    }
}

export function updateTextThemeAndCSS(){
    let db = get(DataBase)
    const root = document.querySelector(':root') as HTMLElement;
    if(!root){
        return
    }
    let textTheme = get(isLite) ? 'standard' : db.textTheme
    let colorScheme = get(isLite) ? 'light' : db.colorScheme.type
    switch(textTheme){
        case "standard":{
            if(colorScheme === 'dark'){
                root.style.setProperty('--FontColorStandard', '#fafafa');
                root.style.setProperty('--FontColorItalic', '#8C8D93');
                root.style.setProperty('--FontColorBold', '#fafafa');
                root.style.setProperty('--FontColorItalicBold', '#8C8D93');
                root.style.setProperty('--FontColorQuote1', '#8BE9FD');
                root.style.setProperty('--FontColorQuote2', '#FFB86C');
            }else{
                root.style.setProperty('--FontColorStandard', '#0f172a');
                root.style.setProperty('--FontColorItalic', '#8C8D93');
                root.style.setProperty('--FontColorBold', '#0f172a');
                root.style.setProperty('--FontColorItalicBold', '#8C8D93');
                root.style.setProperty('--FontColorQuote1', '#8BE9FD');
                root.style.setProperty('--FontColorQuote2', '#FFB86C');
            }
            break
        }
        case "highcontrast":{
            if(colorScheme === 'dark'){
                root.style.setProperty('--FontColorStandard', '#f8f8f2');
                root.style.setProperty('--FontColorItalic', '#F1FA8C');
                root.style.setProperty('--FontColorBold', '#8BE9FD');
                root.style.setProperty('--FontColorItalicBold', '#FFB86C');
                root.style.setProperty('--FontColorQuote1', '#8BE9FD');
                root.style.setProperty('--FontColorQuote2', '#FFB86C');
            }
            else{
                root.style.setProperty('--FontColorStandard', '#0f172a');
                root.style.setProperty('--FontColorItalic', '#F1FA8C');
                root.style.setProperty('--FontColorBold', '#8BE9FD');
                root.style.setProperty('--FontColorItalicBold', '#FFB86C');
                root.style.setProperty('--FontColorQuote1', '#8BE9FD');
                root.style.setProperty('--FontColorQuote2', '#FFB86C');
            }
            break
        }
        case "custom":{
            root.style.setProperty('--FontColorStandard', db.customTextTheme.FontColorStandard);
            root.style.setProperty('--FontColorItalic', db.customTextTheme.FontColorItalic);
            root.style.setProperty('--FontColorBold', db.customTextTheme.FontColorBold);
            root.style.setProperty('--FontColorItalicBold', db.customTextTheme.FontColorItalicBold);
            root.style.setProperty('--FontColorQuote1', db.customTextTheme.FontColorQuote1 ?? '#8BE9FD');
            root.style.setProperty('--FontColorQuote2', db.customTextTheme.FontColorQuote2 ?? '#FFB86C');
            break
        }
    }

    switch(db.font){
        case "default":{
            root.style.setProperty('--risu-font-family', 'Arial, sans-serif');
            break
        }
        case "timesnewroman":{
            root.style.setProperty('--risu-font-family', 'Times New Roman, serif');
            break
        }
        case "custom":{
            root.style.setProperty('--risu-font-family', db.customFont);
            break
        }
    }

    if(!get(SafeModeStore)){
        CustomCSSStore.set(db.customCSS ?? '')
    }
    else{
        CustomCSSStore.set('')
    }
}