"use client"

import React from "react"
import { z } from "zod"
import { AlertTriangle, Plus } from "lucide-react"
import { useForm } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"

import { Button } from "@/shared/components/ui/button"
import { Alert, AlertTitle } from "@/shared/components/ui/alert"
import { FieldGroup } from "@/shared/components/ui/field"
import {
    Rhform,
    RhfTextField,
    RhfTextareaField,
    RhfSelectField,
    RhfAsyncSelectField,
} from "@/shared/components/form"
import { useAuthApi } from "@/shared/useApi"
import { RateType, DEPARTMENT_ROUTES, INVENTORY_ROUTES } from "@garage/api"
import { toast } from "sonner"

// ── Schema ──

const schema = z.object({
    rate_type: z.string().optional(),
    labor_rate: z.object({ value: z.string(), label: z.string() }).nullable().optional(),
    quantity: z.coerce.number().min(1, "Quantity is required"),
    rate: z.string().min(1, "Rate is required"),
    working_hours: z.string().optional(),
    labor_hours: z.string().optional(),
    tax: z.string().optional(),
    chart_of_account: z.string().optional(),
    department: z.object({ value: z.string(), label: z.string() }).nullable().optional(),
    description: z.string().optional(),
})

type FormValues = z.infer<typeof schema>

const DEFAULT_VALUES: FormValues = {
    rate_type: "flat_rate",
    labor_rate: null,
    quantity: 1,
    rate: "",
    working_hours: "",
    labor_hours: "",
    tax: "",
    chart_of_account: "",
    department: null,
    description: "",
}

const RATE_TYPE_OPTIONS = RateType.map((v) => ({
    value: v,
    label: v === "flat_rate" ? "Flat Rate" : "Hourly",
}))

const STORE_OBJECT = { getOptionValue: (o: any) => o, getOptionLabel: (o: any) => o.label }

export type EstimateServiceConfigFormProps = {
    /** The selected service row from the picker dialog */
    service: { id: number; labor_name?: string; selling_price?: string | number }
    estimateId: string
    onSuccess?: () => void
    onCancel?: () => void
}

export function EstimateServiceConfigForm({
    service,
    estimateId,
    onSuccess,
    onCancel,
}: EstimateServiceConfigFormProps) {
    const api = useAuthApi()

    const form = useForm<FormValues>({
        resolver: zodResolver(schema) as any,
        defaultValues: {
            ...DEFAULT_VALUES,
            rate: service.selling_price != null ? String(service.selling_price) : "",
        },
    })

    const [error, setError] = React.useState<string | null>(null)
    const [isPending, setIsPending] = React.useState(false)

    async function handleSubmit(values: FormValues) {
        setError(null)
        setIsPending(true)
        try {
            const promise = api.estimates.addService(estimateId, {
                service_id: service.id,
                rate_type: values.rate_type || undefined,
                labor_rate_id: values.labor_rate ? Number(values.labor_rate.value) : undefined,
                quantity: values.quantity,
                rate: values.rate || undefined,
                working_hours: values.working_hours || undefined,
                labor_hours: values.labor_hours || undefined,
                tax: values.tax || undefined,
                chart_of_account: values.chart_of_account || undefined,
                department_id: values.department ? Number(values.department.value) : undefined,
                description: values.description || undefined,
            })
            toast.promise(promise, {
                loading: "Adding service...",
                success: "Service added successfully",
                error: "Failed to add service",
            })
            await promise
            form.reset()
            onSuccess?.()
        } catch (err: any) {
            setError(err?.message ?? "An unexpected error occurred")
        } finally {
            setIsPending(false)
        }
    }

    return (
        <Rhform form={form} onSubmit={handleSubmit}>
            {error && (
                <Alert variant="destructive" className="mb-4">
                    <AlertTriangle className="me-2 h-4 w-4" />
                    <AlertTitle>Failed to add service</AlertTitle>
                    {error}
                </Alert>
            )}

            <FieldGroup>
                <div className="rounded-md bg-muted px-3 py-2 text-sm font-medium">
                    {service.labor_name ?? `Service #${service.id}`}
                </div>

                <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
                    <RhfTextField
                        name="quantity"
                        label="Quantity"
                        type="number"
                        placeholder="1"
                        required
                    />
                    <RhfTextField
                        name="rate"
                        label="Rate"
                        type="number"
                        placeholder="0.00"
                        required
                    />
                </div>

                <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
                    <RhfSelectField
                        name="rate_type"
                        label="Rate Type"
                        options={RATE_TYPE_OPTIONS}
                    />
                    <RhfAsyncSelectField
                        name="labor_rate"
                        label="Labor Rate"
                        placeholder="Select labor rate"
                        queryKey={[INVENTORY_ROUTES.LABOR_RATES]}
                        listFn={() => api.inventory.listLaborRates()}
                        mapOption={(item: any) => ({
                            value: String(item.id),
                            label: item.title ?? String(item.id),
                        })}
                        {...STORE_OBJECT}
                    />
                </div>

                <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
                    <RhfTextField
                        name="working_hours"
                        label="Working Hours"
                        type="number"
                        placeholder="0.00"
                    />
                    <RhfTextField
                        name="labor_hours"
                        label="Labor Hours"
                        type="number"
                        placeholder="0.00"
                    />
                </div>

                <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
                    <RhfAsyncSelectField
                        name="department"
                        label="Department"
                        placeholder="Select department"
                        queryKey={[DEPARTMENT_ROUTES.INDEX]}
                        listFn={() => api.departments.list()}
                        mapOption={(item: any) => ({
                            value: String(item.id),
                            label: item.name ?? String(item.id),
                        })}
                        {...STORE_OBJECT}
                    />
                    <RhfTextField
                        name="tax"
                        label="Tax (%)"
                        placeholder="e.g. 5"
                    />
                </div>

                <RhfTextField
                    name="chart_of_account"
                    label="Chart of Account"
                    placeholder="e.g. 4000"
                />

                <RhfTextareaField
                    name="description"
                    label="Description"
                    placeholder="Optional description"
                    rows={2}
                />

                <div className="flex justify-end gap-2">
                    {onCancel && (
                        <Button type="button" variant="outline" onClick={onCancel}>
                            Cancel
                        </Button>
                    )}
                    <Button type="submit" disabled={isPending}>
                        {isPending ? "Adding..." : (
                            <>
                                <Plus className="size-4 mr-1" />
                                Add Service
                            </>
                        )}
                    </Button>
                </div>
            </FieldGroup>
        </Rhform>
    )
}