import { FastifyInstance } from "fastify"
import { and, eq, ne } from "drizzle-orm"
import { authTenantUsers, authUsers } from "../../db/schema"
import { matrixService } from "../modules/matrix.service"
import { NotificationService, UserDirectory } from "../modules/notification.service"

const getUserDirectory: UserDirectory = async (server: FastifyInstance, userId) => {
    const rows = await server.db
        .select({ email: authUsers.email })
        .from(authUsers)
        .where(eq(authUsers.id, userId))
        .limit(1)

    return rows[0] || null
}

export default async function communicationRoutes(server: FastifyInstance) {
    const matrix = matrixService(server)
    const notifications = new NotificationService(server, getUserDirectory)
    const handleMatrixError = (req: any, reply: any, err: any, fallbackMessage: string) => {
        req.log.error(err)
        return reply
            .code(err.statusCode || 500)
            .send({ error: err.message || fallbackMessage })
    }

    const roomOptionsFromRequest = (req: any) => {
        const params = req.params as { roomKey?: string }
        const body = (req.body || {}) as {
            key?: string
            name?: string
            topic?: string
            type?: string
            entityType?: string | null
            entityId?: number | null
            entityUuid?: string | null
        }

        return {
            key: params.roomKey || body.key,
            name: body.name,
            topic: body.topic,
            type: body.type,
            entityType: body.entityType,
            entityId: body.entityId,
            entityUuid: body.entityUuid,
        }
    }

    const callModeFromRequest = (req: any): "audio" | "video" => {
        const body = (req.body || {}) as { mode?: string }
        return body.mode === "audio" ? "audio" : "video"
    }

    const notifyTenantUsersAboutCall = async (req: any, room: { key?: string; name?: string }, mode: "audio" | "video") => {
        if (!req.user.tenant_id) return

        try {
            const recipientRows = await server.db
                .select({ userId: authTenantUsers.user_id })
                .from(authTenantUsers)
                .where(and(
                    eq(authTenantUsers.tenant_id, req.user.tenant_id),
                    ne(authTenantUsers.user_id, req.user.user_id)
                ))

            const userIds = recipientRows.map((row) => row.userId)
            if (!userIds.length) return

            await notifications.trigger({
                tenantId: req.user.tenant_id,
                userIds,
                eventType: "communication.call.started",
                title: mode === "audio" ? "Audioanruf gestartet" : "Videokonferenz gestartet",
                message: `${room.name || room.key || "Ein Chatraum"} hat eine laufende Besprechung.`,
                payload: {
                    link: "/communication/chat",
                    roomKey: room.key,
                    roomName: room.name,
                    mode,
                },
                channels: ["inapp", "push"],
            })
        } catch (err) {
            req.log.error({ err }, "Call-Benachrichtigung konnte nicht ausgelöst werden")
        }
    }

    server.get("/communication/matrix/status", async () => {
        return matrix.getStatus()
    })

    server.get("/communication/matrix/me", async (req) => {
        const userId = req.user.user_id

        return {
            matrixUserId: await matrix.matrixUserIdForUser(userId, req.user.tenant_id),
            displayName: await matrix.getCurrentUserDisplayName(userId, req.user.tenant_id),
        }
    })

    server.post("/communication/matrix/me/provision", async (req, reply) => {
        try {
            return await matrix.provisionCurrentUser(req.user.user_id, req.user.tenant_id)
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix provisioning failed")
        }
    })

    server.get("/communication/matrix/tenant-space", async (req, reply) => {
        try {
            return await matrix.getTenantSpaceStatus(req.user.tenant_id)
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix tenant space status failed")
        }
    })

    server.post("/communication/matrix/tenant-space/provision", async (req, reply) => {
        try {
            return await matrix.provisionCurrentTenantSpace(req.user.user_id, req.user.tenant_id)
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix tenant space provisioning failed")
        }
    })

    server.get("/communication/matrix/rooms", async (req, reply) => {
        try {
            return await matrix.listTenantRooms(req.user.tenant_id)
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix rooms failed")
        }
    })

    server.post("/communication/matrix/rooms", async (req, reply) => {
        try {
            return await matrix.provisionTenantRoom(
                req.user.user_id,
                req.user.tenant_id,
                roomOptionsFromRequest(req)
            )
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix room provisioning failed")
        }
    })

    server.get("/communication/matrix/rooms/general", async (req, reply) => {
        try {
            return await matrix.getTenantRoomStatus(req.user.tenant_id, "allgemein", "Allgemeiner Chat")
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix room status failed")
        }
    })

    server.post("/communication/matrix/rooms/general/provision", async (req, reply) => {
        try {
            return await matrix.provisionTenantRoom(req.user.user_id, req.user.tenant_id, {
                key: "allgemein",
                name: "Allgemeiner Chat",
            })
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix room provisioning failed")
        }
    })

    server.get("/communication/matrix/rooms/general/messages", async (req, reply) => {
        try {
            return await matrix.getGeneralRoomMessages(req.user.user_id, req.user.tenant_id)
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix messages failed")
        }
    })

    server.get("/communication/matrix/rooms/general/members", async (req, reply) => {
        try {
            return await matrix.getGeneralRoomMembers(req.user.user_id, req.user.tenant_id)
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix members failed")
        }
    })

    server.post("/communication/matrix/rooms/general/session", async (req, reply) => {
        try {
            return await matrix.createElementRoomSession(req.user.user_id, req.user.tenant_id, {
                key: "allgemein",
                name: "Allgemeiner Chat",
            })
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix session failed")
        }
    })

    server.post("/communication/matrix/rooms/general/call-session", async (req, reply) => {
        try {
            const room = {
                key: "allgemein",
                name: "Allgemeiner Chat",
            }
            const session = await matrix.createLiveKitRoomSession(req.user.user_id, req.user.tenant_id, room)
            await notifyTenantUsersAboutCall(req, room, callModeFromRequest(req))
            return session
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix call session failed")
        }
    })

    server.post("/communication/matrix/rooms/general/members/sync", async (req, reply) => {
        try {
            return await matrix.syncTenantRoomMembers(req.user.user_id, req.user.tenant_id, {
                key: "allgemein",
                name: "Allgemeiner Chat",
            })
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix member sync failed")
        }
    })

    server.post("/communication/matrix/rooms/general/messages", async (req, reply) => {
        try {
            const body = req.body as { text?: string }
            return await matrix.sendGeneralRoomMessage(req.user.user_id, req.user.tenant_id, body.text || "")
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix message send failed")
        }
    })

    server.get("/communication/matrix/rooms/:roomKey", async (req, reply) => {
        try {
            const params = req.params as { roomKey: string }
            return await matrix.getTenantRoomStatus(req.user.tenant_id, params.roomKey)
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix room status failed")
        }
    })

    server.post("/communication/matrix/rooms/:roomKey/provision", async (req, reply) => {
        try {
            return await matrix.provisionTenantRoom(
                req.user.user_id,
                req.user.tenant_id,
                roomOptionsFromRequest(req)
            )
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix room provisioning failed")
        }
    })

    server.get("/communication/matrix/rooms/:roomKey/messages", async (req, reply) => {
        try {
            return await matrix.getTenantRoomMessages(
                req.user.user_id,
                req.user.tenant_id,
                roomOptionsFromRequest(req)
            )
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix messages failed")
        }
    })

    server.get("/communication/matrix/rooms/:roomKey/members", async (req, reply) => {
        try {
            return await matrix.getTenantRoomMembers(
                req.user.user_id,
                req.user.tenant_id,
                roomOptionsFromRequest(req)
            )
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix members failed")
        }
    })

    server.post("/communication/matrix/rooms/:roomKey/session", async (req, reply) => {
        try {
            return await matrix.createElementRoomSession(
                req.user.user_id,
                req.user.tenant_id,
                roomOptionsFromRequest(req)
            )
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix session failed")
        }
    })

    server.post("/communication/matrix/rooms/:roomKey/call-session", async (req, reply) => {
        try {
            const room = roomOptionsFromRequest(req)
            const session = await matrix.createLiveKitRoomSession(
                req.user.user_id,
                req.user.tenant_id,
                room
            )
            await notifyTenantUsersAboutCall(req, room, callModeFromRequest(req))
            return session
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix call session failed")
        }
    })

    server.post("/communication/matrix/rooms/:roomKey/members/sync", async (req, reply) => {
        try {
            return await matrix.syncTenantRoomMembers(
                req.user.user_id,
                req.user.tenant_id,
                roomOptionsFromRequest(req)
            )
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix member sync failed")
        }
    })

    server.post("/communication/matrix/rooms/:roomKey/messages", async (req, reply) => {
        try {
            const body = req.body as { text?: string }
            return await matrix.sendTenantRoomMessage(
                req.user.user_id,
                req.user.tenant_id,
                roomOptionsFromRequest(req),
                body.text || ""
            )
        } catch (err: any) {
            return handleMatrixError(req, reply, err, "Matrix message send failed")
        }
    })
}