///<reference path="../../../src/types/core.d.ts" />
'use strict';

(function () {
    // 负责勇士技能：学习
    const values = {
        1: ['crit'],
        6: ['n'],
        7: ['hungry'],
        8: ['together'],
        10: ['courage'],
        11: ['charge']
    };

    const cannotStudy = [9, 12, 14, 15, 24];

    function canStudySkill(number) {
        const s = (core.status.hero.special ??= { num: [], last: [] });
        if (core.plugin.skillTree.getSkillLevel(11) === 0) return false;
        if (s.num.length >= 1) return false;
        if (s.num.includes(number)) return false;
        if (cannotStudy.includes(number)) return false;
        return true;
    }

    function studySkill(enemy, number) {
        core.status.hero.special ??= { num: [], last: [] };
        const s = core.status.hero.special;
        const specials = core.getSpecials();
        let special = specials[number - 1][1];
        if (special instanceof Function) special = special(enemy);
        if (!canStudySkill(number)) {
            if (!main.replayChecking) {
                core.tip('error', `无法学习${special}`);
            }
            return;
        }
        s.num.push(number);
        s.last.push(core.plugin.skillTree.getSkillLevel(11) * 3 + 2);
        const value = values[number] ?? [];
        for (const key of value) {
            s[key] = enemy[key];
        }
    }

    function forgetStudiedSkill(num, i) {
        const s = core.status.hero.special;
        const index = i !== void 0 && i !== null ? i : s.num.indexOf(num);
        if (index === -1) return;
        s.num.splice(index, 1);
        s.last.splice(index, 1);
        const value = values[number] ?? [];
        for (const key of value) {
            delete s[key];
        }
    }

    function declineStudiedSkill() {
        const s = (core.status.hero.special ??= { num: [], last: [] });
        s.last = s.last.map(v => v - 1);
    }

    function checkStudiedSkill() {
        const s = core.status.hero.special;
        for (let i = 0; i < s.last.length; i++) {
            if (s.last[i] <= 0) {
                this.forgetStudiedSkill(void 0, i);
                i--;
            }
        }
    }

    core.plugin.study = {
        canStudySkill,
        studySkill,
        forgetStudiedSkill,
        declineStudiedSkill,
        checkStudiedSkill
    };
})();