package php

import (
	"io"
	"os"
	"unsafe"
)

// #include "runtime.h"
// #include "zval.h"
// void context_bind(char *name, zval *value);
import "C"

// Context represents an individual execution context.
type Context struct {
	ioContext
	Path string
}

// DefaultContext returns a context with standard out and error.
func DefaultContext() *Context {
	return &Context{
		ioContext: ioContext{
			Output: os.Stdout,
			Error:  os.Stderr,
		},
	}
}

func Output(output io.Writer) *Context {
	ctx := DefaultContext()
	ctx.Output = output
	return ctx
}

func (ctx *Context) SetPath(path string) *Context {
	ctx.Path = path
	return ctx
}

func (ctx *Context) Bind(name string, value any) *Context {
	n := C.CString(name)
	defer C.free(unsafe.Pointer(n))

	zval := go_to_zval(value)
	defer C.zval_destroy(zval)

	C.context_bind(n, zval)
	return ctx
}

// Exec - Execute a program in the given context.
func (ctx Context) Exec(prog *program) Value {
	return Exec(&ctx, prog)
}