# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1 (Odoo Proprietary License v1.0)
# Part of the Fusion Plating product family.

from odoo import api, fields, models


class FpBatch(models.Model):
    """A rack or barrel load of parts being processed through a tank.

    Lifecycle:

        draft → loading → in_process → unloading → complete
                                                  ↗
        (any non-complete state) → cancelled
    """
    _name = 'fusion.plating.batch'
    _description = 'Plating Batch (Rack/Barrel Load)'
    _inherit = ['mail.thread', 'mail.activity.mixin']
    _order = 'create_date desc'

    name = fields.Char(
        string='Batch Reference',
        required=True,
        copy=False,
        readonly=True,
        default=lambda self: self.env['ir.sequence'].next_by_code(
            'fusion.plating.batch') or '/',
        tracking=True,
    )
    facility_id = fields.Many2one(
        'fusion.plating.facility',
        string='Facility',
        required=True,
        tracking=True,
    )
    bath_id = fields.Many2one(
        'fusion.plating.bath',
        string='Bath',
        required=True,
        tracking=True,
    )
    tank_id = fields.Many2one(
        'fusion.plating.tank',
        string='Tank',
        related='bath_id.tank_id',
        store=True,
        readonly=True,
    )
    process_type_id = fields.Many2one(
        related='bath_id.process_type_id',
        store=True,
        readonly=True,
    )
    state = fields.Selection(
        selection=[
            ('draft', 'Draft'),
            ('loading', 'Loading'),
            ('in_process', 'In Process'),
            ('unloading', 'Unloading'),
            ('complete', 'Complete'),
            ('cancelled', 'Cancelled'),
        ],
        string='Status',
        default='draft',
        required=True,
        tracking=True,
    )
    rack_ref = fields.Char(string='Rack / Barrel Ref (legacy)')
    rack_id = fields.Many2one(
        'fusion.plating.rack', string='Rack / Fixture',
        domain="[('state', '!=', 'retired')]",
        tracking=True,
    )
    # Phase 6 (Sub 11) — workorder_id / production_id retired (MRP gone).
    # Native equivalents: x_fc_step_id (fp.job.step) + x_fc_job_id (fp.job)
    # are added by fusion_plating_jobs and carry the same traceability.
    part_count = fields.Integer(string='Part Count')
    start_time = fields.Datetime(string='Process Start', tracking=True)
    end_time = fields.Datetime(string='Process End', tracking=True)
    duration_minutes = fields.Float(
        string='Duration (min)',
        compute='_compute_duration',
        store=True,
    )
    chemistry_ids = fields.One2many(
        'fusion.plating.batch.chemistry',
        'batch_id',
        string='Chemistry Readings',
    )
    chemistry_count = fields.Integer(
        string='Readings',
        compute='_compute_chemistry_count',
    )
    operator_id = fields.Many2one(
        'res.users',
        string='Operator',
        default=lambda self: self.env.user,
        tracking=True,
    )
    company_id = fields.Many2one(
        'res.company',
        string='Company',
        default=lambda self: self.env.company,
    )
    notes = fields.Html(string='Notes')
    active = fields.Boolean(default=True)

    # -------------------------------------------------------------------------
    # Compute
    # -------------------------------------------------------------------------
    @api.depends('start_time', 'end_time')
    def _compute_duration(self):
        for rec in self:
            if rec.start_time and rec.end_time:
                delta = rec.end_time - rec.start_time
                rec.duration_minutes = delta.total_seconds() / 60.0
            else:
                rec.duration_minutes = 0.0

    @api.depends('chemistry_ids')
    def _compute_chemistry_count(self):
        for rec in self:
            rec.chemistry_count = len(rec.chemistry_ids)

    # -------------------------------------------------------------------------
    # Actions
    # -------------------------------------------------------------------------
    def action_start_loading(self):
        self.write({'state': 'loading'})

    def action_start_process(self):
        self.write({
            'state': 'in_process',
            'start_time': fields.Datetime.now(),
        })

    def action_start_unloading(self):
        self.write({
            'state': 'unloading',
            'end_time': fields.Datetime.now(),
        })

    def action_complete(self):
        self.write({'state': 'complete'})

    def action_cancel(self):
        self.write({'state': 'cancelled'})