package asmc

import (
	"strings"

	"git.akyoto.dev/cli/q/src/asm"
	"git.akyoto.dev/cli/q/src/config"
	"git.akyoto.dev/cli/q/src/x86"
)

func (c *compiler) move(x asm.Instruction) {
	switch operands := x.Data.(type) {
	case *asm.RegisterNumber:
		c.code = x86.MoveRegisterNumber(c.code, operands.Register, operands.Number)

	case *asm.RegisterRegister:
		c.code = x86.MoveRegisterRegister(c.code, operands.Destination, operands.Source)

	case *asm.RegisterLabel:
		start := len(c.code)
		c.code = x86.MoveRegisterNumber(c.code, operands.Register, 0x00_00_00_00)
		size := 4
		opSize := len(c.code) - size - start
		regLabel := x.Data.(*asm.RegisterLabel)

		if strings.HasPrefix(regLabel.Label, "data_") {
			c.dataPointers = append(c.dataPointers, &pointer{
				Position: Address(len(c.code) - size),
				OpSize:   uint8(opSize),
				Size:     uint8(size),
				Resolve: func() Address {
					destination, exists := c.dataLabels[regLabel.Label]

					if !exists {
						panic("unknown label")
					}

					return Address(destination)
				},
			})
		} else {
			c.codePointers = append(c.codePointers, &pointer{
				Position: Address(len(c.code) - size),
				OpSize:   uint8(opSize),
				Size:     uint8(size),
				Resolve: func() Address {
					destination, exists := c.codeLabels[regLabel.Label]

					if !exists {
						panic("unknown label")
					}

					return config.BaseAddress + c.codeStart + destination
				},
			})
		}
	}
}