'use strict';

const contractConst = require('../const/contract');
const { buildCatalog } = require('../lib/weapp_contract_catalog');
const moment = require('moment');

async function resolveContractScope(ctx) {
    const spid = typeof ctx.query.spid === 'string' ? ctx.query.spid.trim() : '';
    const tid = ctx.query.tid === undefined ? null : Number(ctx.query.tid);
    if (!spid) throw '缺少项目ID';
    if (tid !== null && (!Number.isSafeInteger(tid) || tid <= 0)) throw '标段ID错误';

    const subProject = await ctx.service.subProject.getDataById(spid);
    if (!subProject || subProject.is_delete || subProject.is_folder ||
        String(subProject.project_id) !== String(ctx.session.sessionProject.id)) {
        throw '项目不存在或无权查看';
    }
    subProject.page_show = ctx.service.subProject.getPageShow(subProject.page_show);
    if (tid ? !subProject.page_show.openTenderContract : !subProject.page_show.openContract) {
        throw tid ? '该项目未开启标段合同管理' : '该项目未开启合同管理';
    }

    const user = ctx.session.sessionUser;
    if (user.is_admin) {
        subProject.permission = ctx.service.subProjPermission.adminPermission;
    } else {
        const permission = await ctx.service.subProjPermission.getSubProjectUserPermission(spid, user.accountId);
        if (!permission || (!tid && ![3, 4, 5].some(value => permission.contract_permission.includes(value)))) {
            throw '当前账号权限不足，请联系管理员添加权限';
        }
        subProject.permission = permission;
    }
    ctx.subProject = subProject;

    if (!tid) return { scope: { spid }, info: subProject, user };
    const tender = await ctx.service.tender.getDataById(tid);
    if (!tender || String(tender.spid) !== spid ||
        String(tender.project_id) !== String(ctx.session.sessionProject.id)) {
        throw '标段不存在或无权查看';
    }
    if (!user.is_admin) {
        const audit = await ctx.service.contractAudit.getDataByCondition({ tid, uid: user.accountId });
        if (!audit) throw '当前账号没有该标段的合同权限';
    }
    return { scope: { tid }, info: tender, user };
}

async function resolveVisibleContract(ctx) {
    const type = ctx.query.type;
    const cid = typeof ctx.query.cid === 'string' ? ctx.query.cid.trim() : '';
    if (!['expenses', 'income'].includes(type) || !cid) throw '合同参数错误';
    const { scope, user } = await resolveContractScope(ctx);
    const contractType = contractConst.type[type];
    const contracts = await ctx.service.contract.getListByUsers({ ...scope, contract_type: contractType }, user);
    const contract = contracts.find(item => String(item.id) === cid);
    if (!contract) throw '合同不存在或无权查看';
    return { scope, contractType, contract };
}

const fileMimeTypes = {
    pdf: 'application/pdf',
    doc: 'application/msword',
    docx: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
    xls: 'application/vnd.ms-excel',
    xlsx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
    ppt: 'application/vnd.ms-powerpoint',
    pptx: 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
    jpg: 'image/jpeg',
    jpeg: 'image/jpeg',
    png: 'image/png',
    gif: 'image/gif',
};

module.exports = app => {
    class WeappContractController extends app.BaseController {
        async tenderList(ctx) {
            try {
                const spid = typeof ctx.query.spid === 'string' ? ctx.query.spid.trim() : '';
                if (!spid) throw '缺少项目ID';
                const subProject = await ctx.service.subProject.getDataById(spid);
                if (!subProject || subProject.is_delete || subProject.is_folder ||
                    String(subProject.project_id) !== String(ctx.session.sessionProject.id)) {
                    throw '项目不存在或无权查看';
                }
                subProject.page_show = ctx.service.subProject.getPageShow(subProject.page_show);
                if (!subProject.page_show.openTenderContract) throw '该项目未开启标段合同管理';
                const user = ctx.session.sessionUser;
                if (!user.is_admin) {
                    const permission = await ctx.service.subProjPermission.getSubProjectUserPermission(spid, user.accountId);
                    if (!permission) throw '您无权查看该项目';
                    subProject.permission = permission;
                }
                ctx.subProject = subProject;
                const accountInfo = await ctx.service.projectAccount.getDataById(user.accountId);
                const tenderList = await ctx.service.tender.getContractList('', null, user.is_admin ? 1 : 0);
                const categoryData = await ctx.service.category.getAllCategory(subProject);
                ctx.body = {
                    code: 0, msg: '', data: {
                        tenderList,
                        categoryData,
                        selfCategoryLevel: accountInfo ? accountInfo.self_category_level : '',
                    },
                };
            } catch (error) {
                this.log(error);
                ctx.body = { code: -1, msg: error.toString(), data: null };
            }
        }

        async catalog(ctx) {
            try {
                const type = ctx.query.type;
                if (!['expenses', 'income'].includes(type)) throw '合同目录参数错误';
                const contractType = contractConst.type[type];
                const { scope, info, user } = await resolveContractScope(ctx);
                const options = { ...scope, contract_type: contractType };
                // Web 端首次打开详情时也会按项目模板初始化目录。
                await ctx.service.contractTree.insertTree(scope, info);
                const folders = await ctx.service.contractTree.getAllDataByCondition({ where: options });
                const contracts = await ctx.service.contract.getListByUsers(options, user);
                const contractIds = [...new Set(contracts.map(contract => contract.id))];
                const fileCounts = await ctx.service.contractAtt.getCounts(contractIds);
                for (const contract of contracts) {
                    contract.fileCount = fileCounts.get(String(contract.id)) || 0;
                }
                ctx.body = { code: 0, msg: '', data: { nodes: buildCatalog(folders, contracts) } };
            } catch (error) {
                this.log(error);
                ctx.body = { code: -1, msg: error.toString(), data: null };
            }
        }

        async summary(ctx) {
            try {
                const { scope, user } = await resolveContractScope(ctx);
                const now = moment().startOf('month');
                const months = Array.from({ length: 6 }, (_, index) => now.clone().subtract(5 - index, 'months').format('YYYY-MM'));
                const start = now.clone().subtract(5, 'months').format('YYYY-MM-DD HH:mm:ss');
                const end = now.clone().add(1, 'month').format('YYYY-MM-DD HH:mm:ss');

                const summarize = async contractType => {
                    const visibleContracts = await ctx.service.contract.getListByUsers({ ...scope, contract_type: contractType }, user);
                    const contracts = [...new Map(visibleContracts.map(item => [item.id, item])).values()];
                    const total = contracts.reduce((sum, item) => ctx.helper.add(sum, item.total_price || 0), 0);
                    const settled = contracts.reduce((sum, item) => ctx.helper.add(sum, item.yf_price || 0), 0);
                    const paid = contracts.reduce((sum, item) => ctx.helper.add(sum, item.sf_price || 0), 0);
                    const unpaid = ctx.helper.sub(total, paid);
                    const percent = total ? ctx.helper.round(ctx.helper.div(settled, total) * 100, 2) : 0;
                    const ids = [...new Set(contracts.map(item => item.id))];
                    const monthly = await ctx.service.contractPay.getMonthlyYfPrice(ids, start, end);
                    const byMonth = new Map(monthly.map(item => [item.month, item.amount]));
                    return { total, paid, unpaid, percent, trend: months.map(month => byMonth.get(month) || 0) };
                };
                const [expenses, income] = await Promise.all([
                    summarize(contractConst.type.expenses),
                    summarize(contractConst.type.income),
                ]);
                ctx.body = { code: 0, msg: '', data: { months, expenses, income } };
            } catch (error) {
                this.log(error);
                ctx.body = { code: -1, msg: error.toString(), data: null };
            }
        }

        async detail(ctx) {
            try {
                const { scope, contractType, contract } = await resolveVisibleContract(ctx);
                const where = { ...scope, contract_type: contractType, cid: contract.id };
                const [pays, files] = await Promise.all([
                    ctx.service.contractPay.getAllDataByCondition({ where, orders: [['create_time', 'desc']] }),
                    ctx.service.contractAtt.getAllDataByCondition({ where, orders: [['upload_time', 'desc']] }),
                ]);
                ctx.body = {
                    code: 0, msg: '', data: {
                        contract: {
                            id: contract.id,
                            c_code: contract.c_code,
                            name: contract.name,
                            create_time: contract.create_time,
                            total_price: contract.total_price,
                            pay_price: contract.pay_price,
                            debit_price: contract.debit_price,
                            yf_price: contract.yf_price,
                            sf_price: contract.sf_price,
                            party_a: contract.party_a,
                            party_a_user: contract.party_a_user,
                            party_b: contract.party_b,
                            party_b_user: contract.party_b_user,
                            sign_date: contract.sign_date,
                            address: contract.address,
                            entity: contract.entity,
                            bank: contract.bank,
                            bank_account: contract.bank_account,
                            settle_code: contract.settle_code,
                            remark: contract.remark,
                        },
                        pays: pays.map(pay => ({
                            id: pay.id,
                            pay_type: pay.pay_type,
                            pay_time: pay.pay_time,
                            sf_price: pay.sf_price,
                        })),
                        files: files.map(file => ({
                            id: file.id,
                            filename: file.filename,
                            filesize: file.filesize,
                            fileext: file.fileext,
                        })),
                    },
                };
            } catch (error) {
                this.log(error);
                ctx.body = { code: -1, msg: error.toString(), data: null };
            }
        }

        async downloadFile(ctx) {
            try {
                const { scope, contractType, contract } = await resolveVisibleContract(ctx);
                const file = await ctx.service.contractAtt.getDataById(ctx.params.fid);
                if (!file || String(file.cid) !== String(contract.id) ||
                    Number(file.contract_type) !== contractType ||
                    (scope.tid && Number(file.tid) !== scope.tid) ||
                    (scope.spid && String(file.spid) !== scope.spid)) {
                    throw '文件不存在或无权查看';
                }
                const ext = String(file.fileext || '').replace(/^\./, '').toLowerCase();
                ctx.response.set({
                    'Content-Type': fileMimeTypes[ext] || 'application/octet-stream',
                    'Content-Disposition': `inline; filename*=UTF-8''${encodeURIComponent(file.filename || 'file')}`,
                });
                ctx.body = await ctx.helper.ossFileGet(file.filepath);
            } catch (error) {
                this.log(error);
                ctx.status = 404;
                ctx.body = { code: -1, msg: error.toString(), data: null };
            }
        }
    }

    return WeappContractController;
};