import type { TriggerValue } from '../domain/entities.js';

const DEX_LEVEL_THRESHOLDS = [
    0,
    350,
    1375,
    3500,
    7125,
    12650,
    20475,
    31000,
    44625,
    61750,
    82775,
    108100,
    138125,
    173250,
    213875,
    260400,
    313225,
    372750,
    439375,
    513500,
    595525,
    685850,
    784875,
    893000,
    1010625,
    1138150,
    1275975,
];

export const clamp = (value: number, min: number, max: number): number =>
    Math.max(min, Math.min(value, max));

export const clampMin = (value: number, min: number): number =>
    value < min ? min : value;

export const clampMax = (value: number, max: number): number =>
    value > max ? max : value;

export const round = (value: number): number => Math.round(value);

export const getMetaNumber = (
    meta: Record<string, TriggerValue>,
    key: string,
    fallback = 0
): number => {
    const value = meta[key];
    return typeof value === 'number' && Number.isFinite(value) ? value : fallback;
};

export const getMetaString = (
    meta: Record<string, TriggerValue>,
    key: string
): string | null => {
    const value = meta[key];
    return typeof value === 'string' ? value : null;
};

export const setMetaNumber = (
    meta: Record<string, TriggerValue>,
    key: string,
    value: number
): void => {
    meta[key] = round(value);
};

export const increaseMetaNumber = (
    meta: Record<string, TriggerValue>,
    key: string,
    delta: number
): number => {
    const next = getMetaNumber(meta, key) + delta;
    meta[key] = round(next);
    return next;
};

export const getDexLevel = (dex: number): number => {
    if (!Number.isFinite(dex) || dex < 0) {
        return 0;
    }

    let level = 0;
    for (let idx = 0; idx < DEX_LEVEL_THRESHOLDS.length; idx += 1) {
        const threshold = DEX_LEVEL_THRESHOLDS[idx]!;
        if (dex < threshold) {
            break;
        }
        level = idx;
    }
    return level;
};

export const getDexLog = (dex1: number, dex2: number): number =>
    (getDexLevel(dex1) - getDexLevel(dex2)) / 55 + 1;

export const parseConflict = (
    raw: TriggerValue | undefined
): Record<number, number> | null => {
    if (raw === undefined || raw === null) {
        return null;
    }
    if (typeof raw === 'string') {
        try {
            const parsed = JSON.parse(raw) as Record<string, number>;
            const result: Record<number, number> = {};
            for (const [key, value] of Object.entries(parsed)) {
                const id = Number(key);
                if (!Number.isFinite(id) || typeof value !== 'number') {
                    continue;
                }
                result[id] = value;
            }
            return Object.keys(result).length ? result : null;
        } catch {
            return null;
        }
    }
    return null;
};

export const stringifyConflict = (
    conflict: Record<number, number> | null
): string => {
    if (!conflict) {
        return '{}';
    }
    const sorted = Object.entries(conflict)
        .map(([key, value]) => [Number(key), value] as const)
        .filter(([key, value]) => Number.isFinite(key) && typeof value === 'number')
        .sort(([, lhs], [, rhs]) => rhs - lhs);

    const ordered: Record<string, number> = {};
    for (const [key, value] of sorted) {
        ordered[String(key)] = value;
    }

    return JSON.stringify(ordered);
};

export const sortConflict = (
    conflict: Record<number, number>
): Record<number, number> => {
    const ordered: Record<number, number> = {};
    const entries = Object.entries(conflict)
        .map(([key, value]) => [Number(key), value] as const)
        .filter(([key, value]) => Number.isFinite(key) && typeof value === 'number')
        .sort(([, lhs], [, rhs]) => rhs - lhs);

    for (const [key, value] of entries) {
        ordered[key] = value;
    }

    return ordered;
};

export const simpleSerialize = (...values: Array<string | number>): string => {
    const result: string[] = [];
    for (const value of values) {
        if (typeof value === 'string') {
            result.push(`str(${value.length},${value})`);
            continue;
        }
        if (Number.isInteger(value)) {
            result.push(`int(${value})`);
            continue;
        }
        const floatValue = value.toLocaleString('en-US', {
            maximumFractionDigits: 6,
            useGrouping: false,
        });
        result.push(`float(${floatValue})`);
    }
    return result.join('|');
};