const express = require('express');
const req = require('express/lib/request');

module.exports = function (options) {
    const db = options.db;
    var router = express.Router();

    router.route('/')
        .get(function(request, response, next) {
            db.Entry.findAll({

            }).then(entries => {
                response.display("library", {
                    user: request.user,
                    pageTitle: "Library - Mantra",
                    entries: entries
                })
            }).catch(error => {
                next(error)
            })
        })

    router.route('/add')
        .get(function(request, response, next) {
            if (request.user) {
                response.display("library-form", {
                    user: request.user,
                    pageTitle: "Add Library - Mantra",
                    entry: { }
                })
            } else {
                next()
            }
        })
        .post(function(request, response, next) {
            if (request.user) {
                db.Dialect.findOne({
                    where: {
                        languageId: "en",
                        countryId: "int"
                    }
                }).then(dialect => {
                    if (dialect) {
                        return db.Entry.create({
                            name: request.body.name,
                            url: request.body.url,
                            dialectId: dialect.id,
                            licenseId: "copyright"
                        })
                    } else {
                        response.redirect("/library/add") // TODO: Show error message on missing dialect...
                    }
                    
                }).then(entry => {
                    if (entry) {
                        response.redirect(`/library/${entry.id}`)
                    } else {
                        next()
                    }
                }).catch(error => {
                    next(error)
                })
            } else {
                next()
            }
        })


    router.route('/:id')
        .get(function(request, response, next) {
            db.Entry.findByPk(request.params.id, {
                include: [
                    {
                        association: db.Entry.EntryApproval
                    },
                    {
                        association: db.Entry.Chapters
                    },
                    {
                        association: db.Entry.TranslationEntries
                    }
                ]
            }).then(entry => {
                response.display("entry", {
                    user: request.user,
                    pageTitle: "Library - Mantra",
                    entry: entry
                })
            }).catch(error => {
                next(error)
            })
        })

    router.route('/:id/chapters/add')
        .get(function(request, response, next) {
            db.Entry.findByPk(request.params.id, {
                include: [
                    {
                        association: db.Entry.EntryApproval
                    },
                    {
                        association: db.Entry.Chapters
                    }
                ]
            }).then(entry => {
                if (entry) {
                    response.display("chapter-form", {
                        user: request.user,
                        pageTitle: "Library - Mantra",
                        entry: entry
                    })
                } else {
                    next()
                }
                
            }).catch(error => {
                next(error)
            })
        })
        .post(function(request, response, next) {
            db.Entry.findByPk(request.params.id, {
                include: [
                    {
                        association: db.Entry.EntryApproval
                    },
                    {
                        association: db.Entry.Chapters
                    }
                ]
            }).then(entry => {
                const isString = typeof request.body.text === "string" || request.body.text instanceof String
                if (entry && isString) {
                    const chunks = request.body.text.trim().split(/\r?\n\r?\n/)
                    db.Chapter.create({
                        name: chunks[0].trim(),
                        entryId: entry.id,
                        chunks: chunks.map((chunk,index) => {
                            return {
                                text: chunk,
                                index: index
                            }
                        })
                    }, {
                        include: [
                            {
                                association: db.Chapter.Chunks
                            }
                        ]
                    }).then(chapter => {
                        response.display("chapter-form", {
                            user: request.user,
                            pageTitle: "Library - Mantra",
                            entry: entry
                        })
                    })
                    
                } else {
                    next()
                }
            }).catch(error => {
                next(error)
            })
        })

    router.route('/:id/chapters/:chapterId')
        .get(function(request, response, next) {
            db.Chapter.findByPk(request.params.chapterId, {
                include: [
                    {
                        association: db.Chapter.Chunks
                    },
                    {
                        association: db.Chapter.Entry
                    }
                ]
            }).then(chapter => {
                if (chapter) {
                    response.display("chapter", {
                        user: request.user,
                        pageTitle: "Chapter - Mantra",
                        chapter: chapter
                    })
                } else {
                    next()
                }
            }).catch(error => {
                next(error)
            })
        })

    router.route('/:id/translations/:translationEntryid')
        .get(function(request, response, next) {
            db.TranslationEntry.findByPk(request.params.translationEntryid, {
                include: [
                    {
                        association: db.TranslationEntry.Entry
                    }
                ]
            }).then(translationEntry => {
                if (translationEntry) {
                    response.display("translation-entry", {
                        user: request.user,
                        pageTitle: "Translation Entry - Mantra",
                        translationEntry: translationEntry,
                    })
                } else {
                    next()
                }
            }).catch(error => {
                next(error)
            })
        })

    router.route('/:id/translations/add')
        .get(function(request, response, next) {
            db.Entry.findByPk(request.params.id, {
                include: [
                    {
                        association: db.Entry.EntryApproval
                    },
                    {
                        association: db.Entry.TranslationEntries
                    }
                ]
            }).then(entry => {
                if (entry) {
                    response.display("translation-form", {
                        user: request.user,
                        pageTitle: "Library - Mantra",
                        entry: entry
                    })
                } else {
                    next()
                }
                
            }).catch(error => {
                next(error)
            })
        })
        .post(function(request, response, next) {
            db.Entry.findByPk(request.params.id, {
                include: [
                    {
                        association: db.Entry.EntryApproval
                    },
                    {
                        association: db.Entry.TranslationEntries
                    },
                    {
                        association: db.Entry.Chapters,
                        include: [
                            {
                                association: db.Chapter.Chunks
                            }
                        ]
                    }
                ]
            }).then(async (entry) => {
                if (entry) {
                    const dialectTokens = request.body.dialect?.split(":")
                    if (dialectTokens?.length == 2) {
                        const countryId = dialectTokens[0].split("-")[0]
                        const languageId = dialectTokens[0].split("-")[1]

                        const dialect = await db.Dialect.findOne({
                            where: {
                                countryId: countryId,
                                languageId: languageId
                            }
                        })

                        if (dialect) {
                            const translationEntry = await db.TranslationEntry.create({
                                name: dialect.name,
                                entryId: entry.id,
                                dialectId: dialect.id
                            })

                            if (translationEntry) {
                                return response.redirect(`/library/${entry.id}/translations/${translationEntry.id}`)
                            }
                        } 
                    }
                } 
                next()
            }).catch(error => {
                next(error)
            })
        })
    
    return router;
};