import * as z from "zod"

export const AccessSchema = z.union([
    z.object({ token: z.string().regex(/^[A-Za-z0-9_-]{20,64}$/) }),
    z.object({ variantId: z.string().uuid() }),
])

export type AiAccess = z.infer<typeof AccessSchema>

export const ChatRequestSchema = z.object({
    access: AccessSchema,
    mode: z.enum(["chat", "phone"]),
    messages: z
        .array(z.object({ role: z.enum(["user", "assistant"]), content: z.string().trim().min(1).max(2000) }))
        .min(1)
        .max(40),
})

export const CHANNELS = { instagram: "Instagram", facebook: "Facebook", linkedin: "LinkedIn", google: "Google Ads" } as const
export type Channel = keyof typeof CHANNELS

export const TONES = ["Locker", "Professionell", "Emotional", "Witzig"] as const
export type Tone = (typeof TONES)[number]

export const GenerateRequestSchema = z.discriminatedUnion("task", [
    z.object({ task: z.literal("email"), access: AccessSchema, inquiry: z.string().trim().min(10).max(4000) }),
    z.object({ task: z.literal("quote"), access: AccessSchema, inquiry: z.string().trim().min(10).max(4000) }),
    z.object({
        task: z.literal("content"),
        access: AccessSchema,
        topic: z.string().trim().min(3).max(500),
        channel: z.enum(["instagram", "facebook", "linkedin", "google"]),
        tone: z.enum(TONES),
    }),
])

export const BookingSchema = z.object({
    art: z.string(),
    name: z.string(),
    kontakt: z.string(),
    datum: z.string().optional(),
    uhrzeit: z.string().optional(),
    personen: z.string().optional(),
    anliegen: z.string().optional(),
})

export type Booking = z.infer<typeof BookingSchema>

export const QuoteSchema = z.object({
    betreff: z.string(),
    anrede: z.string(),
    einleitung: z.string(),
    positionen: z.array(
        z.object({ titel: z.string(), beschreibung: z.string(), menge: z.number(), einheit: z.string(), einzelpreis: z.number() })
    ),
    hinweise: z.array(z.string()),
    rueckfragen: z.array(z.string()),
    gueltig_tage: z.number(),
    abschluss: z.string(),
})

export type Quote = z.infer<typeof QuoteSchema>

export const ContentSchema = z.object({
    varianten: z.array(
        z.object({ hook: z.string(), text: z.string(), hashtags: z.array(z.string()), cta: z.string(), bildidee: z.string() })
    ),
})

export type ContentResult = z.infer<typeof ContentSchema>

// Zeilenweise JSON (NDJSON) von /api/ai/chat und /api/ai/generate (E-Mail)
export type AiEvent =
    | { type: "text"; text: string }
    | { type: "booking"; data: Booking }
    | { type: "error"; message: string }
    | { type: "done" }