# Part of Odoo. See LICENSE file for full copyright and licensing details.

from odoo import models, fields, api


MILKY_WAY_REGIONS = ['P3X', 'P4X', 'P2X', 'P5C']
PEGASUS_REGIONS = ['M4R', 'P3Y', 'M6R']


class Stargate(models.Model):
    _name = 'test_http.stargate'
    _description = 'Stargate'

    name = fields.Char(required=True, store=True, compute='_compute_name', readonly=False, help="The stargate/planet common name.")
    address = fields.Char(required=True, help="The stargate's 6-glyphs address used by other stargates to dial this one.")
    sgc_designation = fields.Char(store=True, compute='_compute_sgc_designation', help="The SGC designation name of this stargate.")
    galaxy_id = fields.Many2one('test_http.galaxy', required=True, help="The galaxy where this stargate is.")
    has_galaxy_crystal = fields.Boolean(store=True, compute='_compute_has_galaxy_crystal', readonly=False, help="Whether this stargate can dial other galaxies.")
    glyph_attach = fields.Image(attachment=True)
    glyph_inline = fields.Image(attachment=False)

    _sql_constraints = [
        ('address_length', 'CHECK(LENGTH(address) = 6)', "Local addresses have 6 glyphs"),
    ]

    @api.depends('galaxy_id')
    def _compute_has_galaxy_crystal(self):
        milky_way = self.env.ref('test_http.milky_way')
        for gate in self:
            gate.has_galaxy_crystal = gate.galaxy_id == milky_way

    @api.depends('sgc_designation')
    def _compute_name(self):
        for gate in self:
            if not gate.name:
                gate.name = gate.sgc_designation

    @api.depends('address')
    def _compute_sgc_designation(self):
        """ Forge a sgc designation that looks like a real one. """
        for gate in self:
            if gate.galaxy_id.name not in ('Milky Way', 'Pegasus'):
                gate.sgc_designation = False
                continue

            region_part = (
                PEGASUS_REGIONS[gate.id % len(PEGASUS_REGIONS)]
                if gate.galaxy_id.name == 'Pegasus'
                else MILKY_WAY_REGIONS[gate.id % len(MILKY_WAY_REGIONS)]
            )
            local_part = str(int.from_bytes(gate.address.encode(), 'big'))[:3]
            gate.sgc_designation = f'{region_part}-{local_part}'


class Galaxy(models.Model):
    _name = 'test_http.galaxy'
    _description = 'Galaxy'

    name = fields.Char(required=True, help='The galaxy common name.')