'use strict';

const auditConst = require('../const/audit');
const shenpiConst = require('../const/shenpi');
const crypto = require('crypto');
const TenderApprovalDraft = require('../public/js/shares/tender_approval_draft');

class TenderApprovalSetting {
    constructor(ctx) {
        this.ctx = ctx;
    }

    async load(tid) {
        const ctx = this.ctx;
        if (!ctx.session.sessionUser.is_admin) throw '没有设置权限';
        const tenderId = Number(tid);
        if (!Number.isSafeInteger(tenderId) || tenderId <= 0) throw '参数有误';
        const tender = await ctx.service.tender.getDataById(tenderId);
        if (!tender || tender.spid !== ctx.subProject.id || tender.project_id !== ctx.session.sessionProject.id) {
            throw '标段不存在或不属于当前项目';
        }
        const tenderInfo = await ctx.service.tenderInfo.getTenderInfo(tender.id);
        if (!tenderInfo) throw '标段信息不存在';
        const lastRevise = await ctx.service.ledgerRevise.getLastestRevise(tender.id);
        return {
            tender,
            revising: Boolean(lastRevise && lastRevise.status !== auditConst.revise.status.checked),
            shenpi: await ctx.service.shenpiAudit.getShenpi(tender.id, tenderInfo),
        };
    }

    async loadDraft(tid, code) {
        const current = await this.load(tid);
        const spec = shenpiConst.sp_lc.find(x => x.code === code);
        if (!spec) throw '审批栏目不存在';
        const snapshot = await this.ctx.service.tenderApprovalSetting.getSnapshot(current.tender.id, spec.type, code === 'stage');
        if (!snapshot.info) throw '标段信息不存在';
        const options = await this.getOptions(current, spec);
        return { snapshot: this.toState(snapshot, code, options.accounts), options, version: this.version(snapshot, code) };
    }

    async saveDraft(tid, code, version, operations) {
        const current = await this.load(tid);
        const spec = shenpiConst.sp_lc.find(x => x.code === code);
        if (!spec || !Array.isArray(operations) || operations.length > 1000 || !operations.length) throw '保存参数有误';
        const service = this.ctx.service.tenderApprovalSetting;
        const transaction = await service.beginTransaction();
        try {
            const tenders = await this.ctx.service.tender.getAllDataForUpdate({ id: current.tender.id }, transaction);
            if (!tenders.length || tenders[0].spid !== this.ctx.subProject.id || tenders[0].project_id !== this.ctx.session.sessionProject.id) throw '标段已变更，请刷新';
            current.tender = tenders[0];
            const snapshot = await service.getSnapshot(current.tender.id, spec.type, code === 'stage', transaction);
            if (!snapshot.info || this.version(snapshot, code) !== version) throw '审批配置已被修改，请关闭弹窗后重新编辑';
            const options = await this.getOptions(current, spec);
            const before = this.toState(snapshot, code, options.accounts);
            const draft = new TenderApprovalDraft(before, options);
            for (const operation of operations) draft.apply(operation);
            draft.validate();
            const shenpi = snapshot.info.shenpi ? JSON.parse(snapshot.info.shenpi) : {};
            shenpi[code] = draft.state.status;
            await service.persist(transaction, current.tender.id, spec.type, {
                before: this.databaseRows(before), after: this.databaseRows(draft.state), shenpi,
                stage: code === 'stage', cooperation: draft.cooperation,
            });
            await transaction.commit();
        } catch (error) {
            await transaction.rollback();
            throw error;
        }
        return { saved: true };
    }

    async getOptions(current, spec) {
        const accounts = await this.ctx.service.projectAccount.getAllSubProjectAccount(this.ctx.subProject);
        let ledgerIds = null;
        if (spec.code === 'stage') {
            const ledgers = await this.ctx.service.ledger.getAllDataByCondition({ columns: ['ledger_id', 'b_code'], where: { tender_id: current.tender.id } });
            ledgerIds = ledgers.filter(x => !x.b_code).map(x => String(x.ledger_id));
        }
        return {
            code: spec.code, spType: spec.type, name: spec.name, owner: current.tender.user_id,
            canCooperate: !current.revising && current.tender.ledger_status === auditConst.ledger.status.checked,
            accounts: accounts.map(x => ({ id: x.id, name: x.name, company: x.company, role: x.role })),
            auditTypes: auditConst.auditType.types, ledgerIds,
        };
    }

    toState(snapshot, code, accounts) {
        const shenpi = snapshot.info.shenpi ? JSON.parse(snapshot.info.shenpi) : {};
        const rows = this.databaseRows(snapshot);
        for (const row of rows.groups) row.change_type = row.change_type ? JSON.parse(row.change_type) : null;
        for (const row of rows.audits) {
            const account = accounts.find(x => x.id === row.audit_id);
            Object.assign(row, { name: account ? account.name : '用户' + row.audit_id, company: account ? account.company : '', role: account ? account.role : '' });
        }
        return Object.assign(rows, { status: shenpi[code] || 1 });
    }

    version(snapshot, code) {
        const shenpi = snapshot.info.shenpi ? JSON.parse(snapshot.info.shenpi) : {};
        const rows = this.databaseRows(snapshot);
        for (const key of Object.keys(rows)) rows[key].sort((a, b) => a.id - b.id);
        return crypto.createHash('sha256').update(JSON.stringify({ status: shenpi[code] || 1, rows })).digest('hex');
    }

    databaseRows(state) {
        const fields = {
            groups: ['id', 'name', 'is_select', 'change_type'],
            audits: ['id', 'audit_id', 'sp_status', 'sp_group', 'audit_order', 'audit_type', 'audit_group', 'audit_group_order', 'audit_group_limit', 'audit_checkno_valid', 'audit_group_need', 'audit_ledger_id'],
            assistants: ['id', 'user_id', 'ass_user_id', 'name', 'company', 'role', 'ass_ledger_id'],
        };
        const result = {};
        for (const key of Object.keys(fields)) {
            result[key] = state[key].map(row => {
                const data = {};
                for (const field of fields[key]) {
                    if (row[field] !== undefined) data[field] = row[field];
                }
                if (key === 'groups' && data.change_type && typeof data.change_type !== 'string') data.change_type = JSON.stringify(data.change_type);
                return data;
            });
        }
        return result;
    }

}

module.exports = TenderApprovalSetting;