# -*- coding: utf-8 -*-
from odoo import models, fields, api
from .constants import TERRAIN_SELECTION


class YtWorldTile(models.Model):
    """地表地块：本期实际持久化内容（坐标 + 高度 + 属性 + 微观世界关联位）。"""
    _name = 'yt.world.tile'
    _description = '地表地块'
    _rec_name = 'coord'

    world_id = fields.Many2one('yt.world', string='所属世界',
                               required=True, ondelete='cascade')
    q = fields.Integer(string='轴向坐标Q', required=True)
    r = fields.Integer(string='轴向坐标R', required=True)
    terrain = fields.Selection(TERRAIN_SELECTION, string='地形', index=True)
    height = fields.Integer(string='高度等级')              # heightLevel 1-12
    flags = fields.Json(string='地表标记')                 # {claimed, decorated}
    micro_world_id = fields.Many2one('yt.world.tile.micro',
                                    string='微观世界', ondelete='set null')
    updated_at = fields.Datetime(string='更新时间', default=fields.Datetime.now)
    coord = fields.Char(string='坐标标识', compute='_compute_coord', store=True)

    _sql_constraints = [
        ('uniq_tile', 'unique(world_id, q, r)',
         '同一世界内 (坐标) 的地块必须唯一'),
    ]

    @api.depends('q', 'r')
    def _compute_coord(self):
        for t in self:
            t.coord = "%s,%s" % (t.q, t.r)

    @api.model
    def create(self, vals):
        rec = super(YtWorldTile, self).create(vals)
        rec._ensure_micro()
        return rec

    def _ensure_micro(self):
        """新建地块时同步建 1:1 微观世界占位。"""
        for t in self:
            if not t.micro_world_id:
                m = self.env['yt.world.tile.micro'].create({'tile_id': t.id})
                t.micro_world_id = m

    @api.model
    def write(self, vals):
        # 任何编辑都刷新 updated_at
        if 'updated_at' not in vals:
            vals['updated_at'] = fields.Datetime.now()
        return super(YtWorldTile, self).write(vals)