# -*- coding: utf-8 -*-
from odoo import models, fields, api, _

class GarmentCosting(models.Model):
    _name = 'garment.costing'
    _inherit = ['mail.thread', 'mail.activity.mixin']
    _description = 'Garment Pre-Costing & Post-Costing Sheet'
    _order = 'name desc'

    name = fields.Char(string='Cost Sheet No', required=True, default=lambda self: _('New'), copy=False, tracking=True)
    style_id = fields.Many2one('garment.style', string='Garment Style', required=True, tracking=True)
    buyer_id = fields.Many2one('res.partner', string='Buyer / Customer', tracking=True)
    order_qty = fields.Integer(string='Target Order Quantity (Pcs)', required=True, default=10000)
    company_id = fields.Many2one('res.company', string='Company', default=lambda self: self.env.company)
    currency_id = fields.Many2one('res.currency', string='Currency', default=lambda self: self.env.company.currency_id)
    
    costing_type = fields.Selection([
        ('pre_costing', 'Pre-Costing (Quotation / Estimate)'),
        ('post_costing', 'Post-Costing (Actual Production Variance)'),
    ], string='Costing Stage', default='pre_costing', required=True, tracking=True)
    
    # 1. Raw Materials (Fabric + Dyeing)
    fabric_cost_per_pc = fields.Float(string='Yarn / Raw Fabric Cost / Pc', default=65.0, digits=(16, 2))
    dyeing_finishing_cost_per_pc = fields.Float(string='Dyeing & Bleaching / Pc', default=12.0, digits=(16, 2))
    
    # 2. Trims & Accessories
    trims_accessories_cost_per_pc = fields.Float(string='Trims & Labels / Pc', default=8.5, digits=(16, 2))
    
    # 3. Value Addition
    printing_embroidery_cost_per_pc = fields.Float(string='Chest Print / Embroidery / Pc', default=14.0, digits=(16, 2))
    washing_cost_per_pc = fields.Float(string='Garment Bio-Washing / Pc', default=5.0, digits=(16, 2))
    
    # 4. Manufacturing Labor (CM - Cut & Make)
    cutting_cost_per_pc = fields.Float(string='Cutting Labor / Pc', default=4.0, digits=(16, 2))
    sewing_cm_cost_per_pc = fields.Float(string='Sewing Assembly CM / Pc', default=28.0, digits=(16, 2), help='Standard sewing labor cost')
    
    # 5. Packaging & Forwarding
    packing_carton_cost_per_pc = fields.Float(string='Polybags & Master Cartons / Pc', default=6.5, digits=(16, 2))
    commercial_freight_cost_per_pc = fields.Float(string='Local Freight & Port Handling / Pc', default=3.0, digits=(16, 2))
    
    # 6. Factory Overheads
    factory_overhead_pct = fields.Float(string='Factory Overheads %', default=8.0)
    factory_overhead_cost = fields.Float(string='Overheads Cost / Pc', compute='_compute_totals', store=True)
    
    # Total Costs
    total_cost_per_pc = fields.Float(string='Total Garment Cost / Pc', compute='_compute_totals', store=True)
    total_cost_per_dozen = fields.Float(string='Total Cost / Dozen', compute='_compute_totals', store=True)
    total_order_cost = fields.Float(string='Total Order Cost', compute='_compute_totals', store=True)
    
    # Commercial Pricing & Margins
    target_selling_price = fields.Float(string='Target Selling Price / Pc', default=180.0, required=True, tracking=True)
    gross_margin_amount = fields.Float(string='Gross Margin / Pc', compute='_compute_margins', store=True)
    gross_margin_pct = fields.Float(string='Gross Margin %', compute='_compute_margins', store=True)
    total_expected_profit = fields.Float(string='Total Expected Profit', compute='_compute_margins', store=True)
    
    notes = fields.Text(string='Costing Notes & Assumptions')

    @api.model_create_multi
    def create(self, vals_list):
        for vals in vals_list:
            if vals.get('name', _('New')) == _('New'):
                vals['name'] = self.env['ir.sequence'].next_by_code('garment.costing') or _('COST/%s') % fields.Date.today().strftime('%Y%m%d')
        return super(GarmentCosting, self).create(vals_list)

    @api.depends('fabric_cost_per_pc', 'dyeing_finishing_cost_per_pc', 'trims_accessories_cost_per_pc',
                 'printing_embroidery_cost_per_pc', 'washing_cost_per_pc', 'cutting_cost_per_pc',
                 'sewing_cm_cost_per_pc', 'packing_carton_cost_per_pc', 'commercial_freight_cost_per_pc',
                 'factory_overhead_pct', 'order_qty')
    def _compute_totals(self):
        for rec in self:
            direct_cost = (rec.fabric_cost_per_pc + rec.dyeing_finishing_cost_per_pc +
                           rec.trims_accessories_cost_per_pc + rec.printing_embroidery_cost_per_pc +
                           rec.washing_cost_per_pc + rec.cutting_cost_per_pc +
                           rec.sewing_cm_cost_per_pc + rec.packing_carton_cost_per_pc +
                           rec.commercial_freight_cost_per_pc)
            rec.factory_overhead_cost = round(direct_cost * (rec.factory_overhead_pct / 100.0), 2)
            tot_pc = round(direct_cost + rec.factory_overhead_cost, 2)
            rec.total_cost_per_pc = tot_pc
            rec.total_cost_per_dozen = round(tot_pc * 12.0, 2)
            rec.total_order_cost = round(tot_pc * (rec.order_qty or 1), 2)

    @api.depends('total_cost_per_pc', 'target_selling_price', 'order_qty')
    def _compute_margins(self):
        for rec in self:
            margin = rec.target_selling_price - rec.total_cost_per_pc
            rec.gross_margin_amount = round(margin, 2)
            if rec.target_selling_price > 0:
                rec.gross_margin_pct = round((margin / rec.target_selling_price) * 100.0, 2)
            else:
                rec.gross_margin_pct = 0.0
            rec.total_expected_profit = round(margin * (rec.order_qty or 1), 2)

    def action_load_from_bom(self):
        """Pre-populates raw material and labor costs from the active Garment BOM"""
        self.ensure_one()
        bom = self.env['garment.bom'].search([('style_id', '=', self.style_id.id)], limit=1)
        if bom:
            self.fabric_cost_per_pc = bom.total_fabric_cost
            self.trims_accessories_cost_per_pc = bom.total_trim_cost
            self.sewing_cm_cost_per_pc = bom.total_operation_cost