import { asNumber, asRecord } from '@sammo-ts/common';
import type { DatabaseClient, WorldStateRow, InputJsonValue } from '../context.js';

export type InheritPointKey =
    | 'previous'
    | 'lived_month'
    | 'max_domestic_critical'
    | 'active_action'
    | 'combat'
    | 'sabotage'
    | 'dex'
    | 'unifier'
    | 'tournament'
    | 'betting'
    | 'max_belong';

export interface InheritConstants {
    minMonthToAllowInheritItem: number;
    inheritBornSpecialPoint: number;
    inheritBornTurntimePoint: number;
    inheritBornCityPoint: number;
    inheritBornStatPoint: number;
    inheritItemUniqueMinPoint: number;
    inheritItemRandomPoint: number;
    inheritBuffPoints: number[];
    inheritSpecificSpecialPoint: number;
    inheritResetAttrPointBase: number[];
    inheritCheckOwnerPoint: number;
}

const DEFAULT_INHERIT_CONST: InheritConstants = {
    minMonthToAllowInheritItem: 4,
    inheritBornSpecialPoint: 6000,
    inheritBornTurntimePoint: 2500,
    inheritBornCityPoint: 1000,
    inheritBornStatPoint: 1000,
    inheritItemUniqueMinPoint: 5000,
    inheritItemRandomPoint: 3000,
    inheritBuffPoints: [0, 200, 600, 1200, 2000, 3000],
    inheritSpecificSpecialPoint: 4000,
    inheritResetAttrPointBase: [1000, 1000, 2000, 3000],
    inheritCheckOwnerPoint: 1000,
};

const resolveNumberArray = (value: unknown, fallback: number[]): number[] => {
    if (!Array.isArray(value)) {
        return fallback;
    }
    const filtered = value
        .map((item) => (typeof item === 'number' && Number.isFinite(item) ? item : null))
        .filter((item): item is number => item !== null);
    return filtered.length > 0 ? filtered : fallback;
};

export const resolveInheritConstants = (worldState: WorldStateRow): InheritConstants => {
    const config = asRecord(worldState.config);
    const configConst = asRecord(config.const);

    return {
        minMonthToAllowInheritItem: asNumber(
            configConst.minMonthToAllowInheritItem,
            DEFAULT_INHERIT_CONST.minMonthToAllowInheritItem
        ),
        inheritBornSpecialPoint: asNumber(
            configConst.inheritBornSpecialPoint,
            DEFAULT_INHERIT_CONST.inheritBornSpecialPoint
        ),
        inheritBornTurntimePoint: asNumber(
            configConst.inheritBornTurntimePoint,
            DEFAULT_INHERIT_CONST.inheritBornTurntimePoint
        ),
        inheritBornCityPoint: asNumber(
            configConst.inheritBornCityPoint,
            DEFAULT_INHERIT_CONST.inheritBornCityPoint
        ),
        inheritBornStatPoint: asNumber(
            configConst.inheritBornStatPoint,
            DEFAULT_INHERIT_CONST.inheritBornStatPoint
        ),
        inheritItemUniqueMinPoint: asNumber(
            configConst.inheritItemUniqueMinPoint,
            DEFAULT_INHERIT_CONST.inheritItemUniqueMinPoint
        ),
        inheritItemRandomPoint: asNumber(
            configConst.inheritItemRandomPoint,
            DEFAULT_INHERIT_CONST.inheritItemRandomPoint
        ),
        inheritBuffPoints: resolveNumberArray(configConst.inheritBuffPoints, DEFAULT_INHERIT_CONST.inheritBuffPoints),
        inheritSpecificSpecialPoint: asNumber(
            configConst.inheritSpecificSpecialPoint,
            DEFAULT_INHERIT_CONST.inheritSpecificSpecialPoint
        ),
        inheritResetAttrPointBase: resolveNumberArray(
            configConst.inheritResetAttrPointBase,
            DEFAULT_INHERIT_CONST.inheritResetAttrPointBase
        ),
        inheritCheckOwnerPoint: asNumber(
            configConst.inheritCheckOwnerPoint,
            DEFAULT_INHERIT_CONST.inheritCheckOwnerPoint
        ),
    };
};

export const buildResetCost = (baseCosts: number[], level: number): number => {
    const costs = [...baseCosts];
    while (costs.length <= level) {
        const size = costs.length;
        const next = (costs[size - 1] ?? 0) + (costs[size - 2] ?? 0);
        costs.push(next);
    }
    return costs[level] ?? 0;
};

export const readInheritancePoint = async (
    db: DatabaseClient,
    userId: string,
    key: InheritPointKey
): Promise<number> => {
    const row = await db.inheritancePoint.findUnique({
        where: {
            userId_key: {
                userId,
                key,
            },
        },
        select: {
            value: true,
        },
    });
    return row?.value ?? 0;
};

export const setInheritancePoint = async (
    db: DatabaseClient,
    userId: string,
    key: InheritPointKey,
    value: number
): Promise<void> => {
    await db.inheritancePoint.upsert({
        where: {
            userId_key: {
                userId,
                key,
            },
        },
        update: {
            value,
        },
        create: {
            userId,
            key,
            value,
        },
    });
};

export const addInheritancePoint = async (
    db: DatabaseClient,
    userId: string,
    key: InheritPointKey,
    delta: number
): Promise<number> => {
    const current = await readInheritancePoint(db, userId, key);
    const next = current + delta;
    await setInheritancePoint(db, userId, key, next);
    return next;
};

export const appendInheritanceLog = async (
    db: DatabaseClient,
    userId: string,
    year: number,
    month: number,
    text: string
): Promise<void> => {
    await db.inheritanceLog.create({
        data: {
            userId,
            year,
            month,
            text,
        },
    });
};

export const readUserMetaValue = (meta: Record<string, unknown>, key: string): number => {
    const value = meta[key];
    if (typeof value !== 'number' || !Number.isFinite(value)) {
        return 0;
    }
    return value;
};

export const computeDexPoint = (meta: Record<string, unknown>): number => {
    let total = 0;
    for (const [key, value] of Object.entries(meta)) {
        if (!key.startsWith('dex')) {
            continue;
        }
        if (typeof value === 'number' && Number.isFinite(value)) {
            total += value;
        }
    }
    return total * 0.001;
};

export const computeInheritanceItems = async (options: {
    db: DatabaseClient;
    userId: string;
    generalMeta: Record<string, unknown> | null;
    isUnited: boolean;
}): Promise<Record<InheritPointKey, number>> => {
    const previous = await readInheritancePoint(options.db, options.userId, 'previous');
    const unifier = await readInheritancePoint(options.db, options.userId, 'unifier');

    if (options.isUnited) {
        return {
            previous,
            lived_month: 0,
            max_domestic_critical: 0,
            active_action: 0,
            combat: 0,
            sabotage: 0,
            dex: 0,
            unifier,
            tournament: 0,
            betting: 0,
            max_belong: 0,
        };
    }

    const meta = options.generalMeta ?? {};
    const livedMonth = readUserMetaValue(meta, 'inherit_lived_month');
    const maxDomestic = readUserMetaValue(meta, 'max_domestic_critical');
    const activeAction = readUserMetaValue(meta, 'inherit_active_action');
    const combat = readUserMetaValue(meta, 'rank_warnum') * 5;
    const sabotage = readUserMetaValue(meta, 'firenum') * 20;
    const dex = computeDexPoint(meta);

    return {
        previous,
        lived_month: livedMonth,
        max_domestic_critical: maxDomestic,
        active_action: activeAction,
        combat,
        sabotage,
        dex,
        unifier,
        tournament: 0,
        betting: 0,
        max_belong: 0,
    };
};

export const sumInheritanceItems = (items: Record<InheritPointKey, number>): number => {
    return Object.entries(items).reduce((acc, [key, value]) => (key === 'previous' ? acc : acc + value), items.previous);
};

export const readUserStateMeta = async (db: DatabaseClient, userId: string): Promise<Record<string, unknown>> => {
    const row = await db.inheritanceUserState.findUnique({
        where: { userId },
        select: { meta: true },
    });
    return asRecord(row?.meta);
};

export const writeUserStateMeta = async (
    db: DatabaseClient,
    userId: string,
    meta: Record<string, unknown>
): Promise<void> => {
    const jsonMeta = meta as InputJsonValue;
    await db.inheritanceUserState.upsert({
        where: { userId },
        update: { meta: jsonMeta },
        create: { userId, meta: jsonMeta },
    });
};