'use strict';

/**
 *
 *
 * @author Mai
 * @date
 * @version
 */

const path = require('path');
const fs = require('fs');
const sendToWormhole = require('stream-wormhole');

module.exports = app => {

    class TemplateController extends app.BaseController {
        /**
         * 下载 各种模板
         * @param ctx
         * @returns {Promise<void>}
         */
        async download(ctx) {
            const file = ctx.params.file;
            if (file) {
                try {
                    let fileName;
                    switch (file) {
                        case '导入分项清单EXCEL格式.xlsx':
                            fileName = path.join(this.app.baseDir, 'app', 'public', 'files', 'template', 'ledger', '导入分项清单EXCEL格式.xlsx');
                            break;
                        case '导入工程量清单EXCEL格式.xls':
                            fileName = path.join(this.app.baseDir, 'app', 'public', 'files', 'template', 'ledger', '导入工程量清单EXCEL格式.xls');
                            break;
                        case '估概预算示例EXCEL格式.xlsx':
                            fileName = path.join(this.app.baseDir, 'app', 'public', 'files', 'template', file);
                            break;
                        case '控制价示例EXCEL格式.xlsx':
                            fileName = path.join(this.app.baseDir, 'app', 'public', 'files', 'template', file);
                            break;
                        default:
                            throw '参数错误'
                    }
                    ctx.body = await fs.readFileSync(fileName);
                } catch (err) {
                    this.log(err);
                    if (err.stack) {
                        ctx.body = '您下载的示例文件不存在';
                    } else {
                        ctx.body = err;
                    }
                }
            } else {
                ctx.body = '参数错误';
            }
        }

        async posCalc(ctx) {
            try {
                const renderData = {
                    validColInfo: ctx.service.calcTmpl.TemplateRela.posCalc.ValidColInfo,
                    jsFiles: this.app.jsFiles.common.concat(this.app.jsFiles.template.posCalc),
                };
                renderData.templateList = await ctx.service.calcTmpl.getAllTemplate(ctx.session.sessionProject.id, 'posCalc');
                await ctx.service.calcTmpl.checkTemplateUsed(renderData.templateList, 'posCalc');
                const specList = await ctx.service.stdExtraList.getList(0);
                renderData.specList = specList.map(x => { return { value: x.id, text: x.name }; });
                await this.layout('template/pos_calc.ejs', renderData, 'template/pos_calc_modal.ejs');
            } catch (err) {
                ctx.log(err);
                ctx.postError(err, '查看模板数据错误');
                ctx.redirect(ctx.request.header.referer);
            }
        }
        async cost(ctx) {
            try {
                const renderData = {
                    validColInfo: ctx.service.calcTmpl.TemplateRela.cost.ValidColInfo,
                    jsFiles: this.app.jsFiles.common.concat(this.app.jsFiles.template.cost),
                };
                renderData.templateList = await ctx.service.calcTmpl.getAllTemplate(ctx.session.sessionProject.id, 'cost');
                await ctx.service.calcTmpl.checkTemplateUsed(renderData.templateList, 'cost');
                await this.layout('template/cost.ejs', renderData, 'template/cost_modal.ejs');
            } catch (err) {
                ctx.log(err);
                ctx.postError(err, '查看模板数据错误');
                ctx.redirect(ctx.request.header.referer);
            }
        }

        //  ------------ 以下方法为所有模板共用 --------------
        async load(ctx) {
            try {
                const data = JSON.parse(ctx.request.body.data);
                const filter = data.filter ? data.filter.split(';') : [];
                const result = {};
                for (const f of filter) {
                    switch(f) {
                        case 'detail':
                            result[f] = await this.ctx.service.calcTmpl.getTemplate(data.id, data.type);
                            break;
                        default:
                            throw '未知数据类型';
                    }
                }
                ctx.body = { err: 0, msg: '', data: result };
            } catch (error) {
                ctx.log(error);
                ctx.ajaxErrorBody(error, '加载数据失败');
            }
        }
        async saveTemplate(ctx) {
            try {
                const data = JSON.parse(ctx.request.body.data);
                const result = await ctx.service.calcTmpl.saveTemplate(data);
                ctx.body = { err: 0, msg: '', data: result };
            } catch (err) {
                ctx.log(err);
                ctx.ajaxErrorBody(err, '修改数据失败');
            }
        }
        async preview(ctx) {
            try {
                const data = JSON.parse(ctx.request.body.data);
                const spreadSetting = this.ctx.service.calcTmpl.calcSpreadCache(data.type, data.col_set, data.multi_header);
                const testData = await this.ctx.service.calcTmpl.getCalcTestData(data.col_set, data.type, 3);
                const calc = this.ctx.service.calcTmpl._getCalcExpr(spreadSetting.cols);
                ctx.body = { err: 0, msg: '', data: { spreadSetting, testData, calc } };
            } catch (error) {
                ctx.log(error);
                ctx.ajaxErrorBody(error, '预览失败');
            }
        }
        async reCalcTemplate(ctx) {
            try {
                const templateId = ctx.query.tid;
                await ctx.service.calcTmpl.reCalcTemplate(templateId, true);
            } catch(error) {
                ctx.log(error);
                ctx.postError(error, '重算模板失败');
            }
            ctx.redirect(ctx.request.header.referer);
        }
        async exportTemplate(ctx) {
            try {
                const template = await ctx.service.calcTmpl.getTemplate(ctx.query.tid);
                if (!template) throw '计算模板不存在';
                if (template.project_id !== ctx.session.sessionProject.id) throw '您无权导出该模板数据';

                const Cpd = require('../lib/crypt').cpd;
                const cpd = new Cpd();
                const filename = `${template.name}.ctd`;
                const filepath = path.join(this.ctx.app.baseDir, 'temp', filename);
                await cpd.encrypt({ type: template.type, col_set: template.col_set, multi_header: template.multi_header }, filepath);
                const userAgent = (ctx.request.header['user-agent'] || '').toLowerCase();
                let disposition = '';
                if (userAgent.indexOf('msie') >= 0 || userAgent.indexOf('chrome') >= 0) {
                    disposition = 'attachment; filename=' + encodeURIComponent(filename);
                } else if (userAgent.indexOf('firefox') >= 0) {
                    disposition = 'attachment; filename*="utf8\'\'' + encodeURIComponent(filename) + '"';
                } else {
                    /* safari等其他非主流浏览器只能自求多福了 */
                    disposition = 'attachment; filename=' + new Buffer(filename).toString('binary');
                }
                ctx.response.set({
                    'Content-Type': 'application/octet-stream',
                    'Content-Disposition': disposition,
                });
                ctx.body = await fs.readFileSync(filepath);
            } catch(err) {
                ctx.log(err);
                ctx.postError(err, '导出模板数据失败');
            }
        }
        async importTemplate(ctx) {
            const template = await ctx.service.calcTmpl.getTemplate(ctx.query.tid);
            if (!template) throw '计算模板不存在';

            const create_time = Date.parse(new Date()) / 1000;
            const filepath = path.join(this.ctx.app.baseDir, 'temp', `计算模板${create_time}.ctd`);
            let stream, index = 0;
            try {
                const parts = ctx.multipart({ autoFields: true });
                stream = await parts();
                while (stream !== undefined) {
                    if (!stream.filename) throw '未发现上传文件!';
                    // 保存文件
                    await ctx.helper.saveStreamFile(stream, filepath);
                    await sendToWormhole(stream);
                    ++index;
                    if (Array.isArray(parts.field.size) && index < parts.field.size.length) {
                        stream = await parts();
                    } else {
                        stream = undefined;
                    }
                }
                const Cpd = require('../lib/crypt').cpd;
                const cpd = new Cpd();
                const data = await cpd.decrypt(filepath);
                if (template.type !== data.type) throw '导入的模板文件与当前模板类型不一致，不可导入';

                const result =await ctx.service.calcTmpl.saveTemplate({ update: { id: template.id, col_set: data.col_set, multi_header: data.multi_header } });
                ctx.body = { err: 0, mgs: '', data: result };
            } catch (err) {
                // 失败需要消耗掉stream 以防卡死
                if (stream) await sendToWormhole(stream);
                ctx.log(err);
                ctx.ajaxErrorBody(err, '导入模板文件失败');
            }
        }
        // ---------------------------------------------------

        async saveLedgerTemplate(ctx) {
            try {
                const data = JSON.parse(ctx.request.body.data);
                const result = await ctx.service.ledgerTemplate.saveTemplate(data);
                ctx.body = { err: 0, msg: '', data: result };
            } catch (err) {
                ctx.log(err);
                ctx.ajaxErrorBody(err, '修改数据失败');
            }
        }
    }

    return TemplateController;
};